FORM2
THE PATENTS ACT 1970 [39 OF 1970]
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10 and Rule 13]
TITLE: “A SEATING ARTICLE”
NAME AND ADDRESS OF THE APPLICANT:
COMFORT GRID TECHNOLOGIES PRIVATE LIMITED, 7th Floor, Unit 7A, Techweb Centre,
New Link Road, Near Raigad Military School, Jogeshwari West, Mumbai, Mumbai Suburban,
Maharashtra, 400102
NATIONALITY: Indian.
The following specification particularly describes the invention and the manner in which it is to
be performed.
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TECHNICAL FIELD
Present disclosure in general relates to furniture systems. Particularly, but not exclusively, the
present disclosure relates to a seating article in the furniture systems. Further, embodiments of the
present disclosure discloses a backrest sub-assembly for use in the seating article.
BACKGROUND OF THE DISCLOSURE
Generally, seating articles are designed to provide a comfortable sitting position for a user. The
seating article may be any one of a chair, a sofa, a couch and many more. The seating articles have
evolved over several decades to provide optimum comfort and focus nowadays is directed towards
making the seating articles plusher and more luxurious for the user. To provide the desired comfort,
the seating articles include various features including arm rests, headrests, recliner leg rest or
recliner seats. The seating articles are employed and used in various spaces including residential
spaces, recreational facilities, and also office spaces. Typically in the office spaces, reclining chairs
are preferred as the same can be quite comfortable for the users. In the office space, the user may
spend extended periods of time inter time interacting directly with input devices and video displays
typically while sitting at some kind of desk or computer supporting workstation. Hours upon hours
are spent in an upright sitting posture, remaining relatively static and perhaps occasionally shifting
positions in small and incidental ways, all while staring at a screen and making small repetitive
motions of the hands and fingers with the arms and hands and the back and neck held in positions
of varying degrees of discomfort and stress. The final outcome is an escalating trend of injuries
related to repetitive strain and overuse, which primarily stem from workplace activities. While
most of the reclining chairs are designed to provide a comfortable sitting position for the user,
most designs force the user’s body into unhealthy seating postures. Specifically, the conventional
reclining chairs having a back frame that may not be adequately designed and may force the user
sitting into the unhealthy postures lead to the lower back pain of the user during prolonged sitting
thereby increasing the chances of causing an health condition like herniated disc, osteoporosis, etc.
The present disclosure is directed to overcome one or more limitations stated above or any other
limitation associated with conventional arts.
The drawbacks/difficulties/disadvantages/limitations of the conventional techniques explained in

the background section are just for exemplary purpose and the disclosure would never limit its
scope only such limitations. A person skilled in the art would understand that this disclosure and
below mentioned description may also solve other problems or overcome the other
drawbacks/disadvantages of the conventional arts which are not explicitly captured above.
SUMMARY OF THE DISCLOSURE
The shortcomings of the prior art are overcome, and additional advantages are provided through
the provision of cushioning component of the present disclosure. Additional features and
advantages are realized through the techniques of the present disclosure. Other embodiments and
aspects of the disclosure are described in detail herein.
In one non-limiting embodiment of the present disclosure a backrest sub-assembly for a seating
article is disclosed. The backrest sub-assembly includes a connecting arm, one end of the
connecting arm may be pivotably connectable to a seat sub-assembly of the seating article. A
backrest frame that may be connectable to the connecting arm on an other end opposite to the one
end. The backrest frame may be displaceable between an extended position and a retracted
position. The subassembly further includes a suspension module that may be structured to connect
the backrest frame and the connecting arm. The suspension module may be configured to displace
the backrest frame between the extended position and the retracted position relative to the
connecting arm.
In an embodiment, the backrest frame includes a top frame portion, a bottom frame portion, at
least one curved arm and a non-curved arm extending between the top frame portion and the
bottom frame portion.
In an embodiment, the connecting arm may be defined with a first portion extending rearwardly
about a horizontal axis (X-X) up to a defined distance and transitioning into a second portion
extending substantially vertically from the first portion.
In an embodiment, the backrest frame includes an intermediate frame portion defined between the
top frame portion and the bottom frame portion.
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In an embodiment, the suspension module includes a housing secured to the connecting arm and
defined with an opening on either ends. One of the opening of the housing may be structured to
receive a tensioner and remaining of the opening of structured to receive a connecting shaft
extending from the intermediate frame portion.
In an embodiment, the at least one resilient member may be disposed in the housing between the
tensioner and the connecting shaft.
In an embodiment, the housing may be defined with a key seat on an interior circumference of the
housing and the key seat may be structured to receive a key of the connecting shaft protruding
outwardly from an outer surface of the connecting shaft. The key seat and the key are structured
to prevent the rotation of the connecting shaft with respect to the housing.
In an embodiment, the suspension module includes a locking unit configured to selectively lock
the backrest frame between the extended portion and the retracted portion.
In an embodiment, the tensioner may be structured to rotate in a clockwise direction and an
anticlockwise direction to selectively increase or decrease the tension of the at least one resilient
member. The suspension module is at least one of a hydraulic system or a pneumatic system.
In an embodiment, the backrest frame is defined with a front face structured to receive a cushioning
component. The cushioning component is a mesh and is receivable on the front face of the backrest
frame.
In an embodiment, the cushioning component may be an elastomeric cushioning member defined
with a top cushioning surface and a bottom base surface. The elastomeric cushioning member
includes a plurality of buckling walls of at least one of an intersecting configuration and an nonintersecting configuration defining a grid structure having an array of openings. The plurality of
buckling walls are structured to buckle on application of load, for uniformly distributing the load
across the cushioning component and return to an original state upon removal of the load.

In an embodiment, the elastomeric cushioning member is manufactured from a material including
one of an elastomeric material, a thermoplastic elastomer, a natural rubber, a synthetic elastomer,
a blend of natural and synthetic elastomers.
In an embodiment, the cushioning member may be manufactured from a material including a foam,
a polyurethane, a latex, a memory foam.
In an embodiment, a stabilizing fabric secured to at least the top cushioning surface and the bottom
base surface of the elastomeric cushioning member.
In an embodiment, an auxiliary pad provided between the cushioning component and the
intermediate frame portion.
In an embodiment, the top frame portion is defined with a receiving portion structured to receive
and secure a headrest.
In an another non-limiting embodiment a chair is disclosed. The chair includes a seat subassembly, a backrest sub-assembly connected to the seat sub-assembly. The sub-assembly includes
a connecting arm, one end of the connecting arm pivotably connectable to a seat sub-assembly of
the seating article, a backrest frame that may be connectable to the connecting arm on an other end
opposite to the one end. The backrest frame may be displaceable between an extended position
and a retracted position. The subassembly further includes a suspension module that may be
structured to connect the backrest frame and the connecting arm. The suspension module may be
configured to displace the backrest frame between the extended position and the retracted position
relative to the connecting arm.
In an embodiment, the seat sub-assembly of the chair includes a base plate defined with a top
surface and a bottom surface. The top surface is structured to receive a cushioning component.
In an embodiment, the chair includes a control sub-assembly disposed on the bottom surface of
the seat sub-assembly and is configured to receive the connecting arm. The control sub-assembly
may be configured to recline the backrest sub-assembly and rotate the seat subassembly about a
vertical axis (Y-Y).
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In an embodiment, the control sub-assembly of the chair includes a height-adjusting mechanism
extending vertically downward and configured to selectively adjust the height of the seat
subassembly. The height-adjusting mechanism is at least one of a hydraulic system or a pneumatic
system.
In an embodiment, the chair includes a plurality of legs extending substantially perpendicularly
from the height-adjusting mechanism and a free end of the plurality of legs is provided with a
castor wheel.
In an embodiment, the chair includes a handrest connected to lateral ends of the base plate. The
height of the handrest is selectively adjusted as per the requirement.
In an embodiment, the top surface of the seat subassembly of the chair is structured to receive a
cushioning component. The cushioning component is a mesh and is receivable on the top surface
of the seat subassembly.
In an embodiment, the cushioning component receivable on the top surface of the seat assembly
of the chair is an elastomeric cushioning member. The elastomeric cushioning member defined
with a top cushioning surface; and a bottom base surface. The elastomeric cushioning member
includes a plurality of buckling walls of at least one of an intersecting configuration and a nonintersecting configuration defining a grid structure having an array of openings. The plurality of
buckling walls are being structured to buckle on application of load, for uniformly distributing the
load across the cushioning component and return to an original state upon removal of the load.
In an embodiment, the elastomeric cushioning member is manufactured from a material including
one of an elastomeric material, a thermoplastic elastomer, a natural rubber, a synthetic elastomer,
a blend of natural and synthetic elastomers, silica gel, polymer, and liquid silicon.
In an embodiment, the chair includes a stabilizing fabric secured to at least the top cushioning
surface and the bottom base surface of the elastomeric cushioning member.
It is to be understood that the aspects and embodiments of the disclosure described above may be
used in combination with each other. Several of the aspects and embodiments may be combined

to form a further embodiment of the disclosure.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In
addition to the illustrative aspects, embodiments, and features described above, further aspects,
embodiments, and features will become apparent by reference to the drawings and the following
detailed description.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The novel features and characteristics of the disclosure are set forth in the appended claims. The
disclosure itself, however, as well as a preferred mode of use, further objectives, and advantages
thereof, will best be understood by reference to the following detailed description of an illustrative
embodiment when read in conjunction with the accompanying figures. One or more embodiments
are now described, by way of example only, with reference to the accompanying figures wherein
like reference numerals represent like elements and in which:
Fig. 1 illustrates a side view of the seating article , in accordance with an embodiment of the
present disclosure;
Fig. 2 illustrates a back view of the seating article of Fig 1, in accordance with an embodiment of
the present disclosure;
Fig. 3 illustrates a side view of a backrest sub assembly of the seating article of Fig 1, in accordance
with an embodiment of the present disclosure;
Fig. 4 illustrates an isometric view of a backrest sub assembly of the seating article of Fig 1, in
accordance with an embodiment of the present disclosure;
Fig. 5 illustrates a side view of a suspension module of a backrest subassembly of the seating
article of Fig 1 in an extended position, in accordance with an embodiment of the present
disclosure;
Fig. 6 illustrates a side view of the suspension module of the backrest subassembly of the seating
article of Fig 1 in a retracted position , in accordance with an embodiment of the present disclosure;
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Fig. 7 illustrates a sectional isometric view of the suspension module of the backrest subassembly
of the seating article of Fig 1, in accordance with an embodiment of the present disclosure;
Fig. 8 illustrates an exploded bottom view of a key and a key seat of the suspension module of the
seating article of Fig 1, in accordance with an embodiment of the present disclosure;
Fig. 9 illustrates a schematic perspective top view of a cushioning component of the seating
article of Fig 1, in accordance with an embodiment of the present disclosure; and
Fig. 10 illustrates a schematic top view of the cushioning component of the seating article of Fig
1, in accordance with an embodiment of the present disclosure.
The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in
the art will readily recognize from the following description that alternative embodiments of the
structures and methods illustrated herein may be employed without departing from the principles
of the disclosure described herein.
DETAILED DESCRIPTION
The foregoing has broadly outlined the features and technical advantages of the present disclosure
in order that the detailed description of the disclosure that follows may be better understood.
Additional features and advantages of the disclosure will be described hereinafter which forms the
subject of the claims of the disclosure. It should be appreciated by those skilled in the art that the
conception and specific embodiment disclosed may be readily utilized as a basis for modifying or
designing other alternatives for carrying out the same purposes of the present disclosure. It should
also be realized by those skilled in the art that such equivalent constructions do not depart from
the scope of the disclosure as set forth in the appended claims. The novel features which are
believed to be characteristic of the disclosure, both as to its organization and method of operation,
together with further objects and advantages will be better understood from the following
description when considered in connection with the accompanying figures. It is to be expressly
understood, however, that each of the figures is provided for the purpose of illustration and
description only and is not intended as a definition of the limits of the present disclosure.

In the present disclosure, the word "exemplary" is used herein to mean "serving as an example,
instance, or illustration." Any embodiment or implementation of the present subject matter
described herein as "exemplary" is not necessarily to be construed as preferred or advantageous
over other embodiments.
While the disclosure is susceptible to various modifications and alternative forms, specific
embodiments thereof have been shown by way of example in the drawings and will be described
in detail below. It should be understood, however that it is not intended to limit the disclosure to
the forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents,
and alternative falling within the spirit and the scope of the disclosure.
The terms “comprises”, “comprising”, or any other variations thereof, are intended to cover a nonexclusive inclusion, such that an arrangement, or process that comprises a list of components or
steps does not include only those components or steps but may include other components or steps
not expressly listed or inherent to such setup or device or process. In other words, one or more
elements in an arrangement proceeded by “comprises… a” does not, without more constraints,
preclude the existence of other elements or additional elements in the arrangement.
Embodiment of the present disclosure discloses a backrest sub-assembly for a seating article. The
seating article may be designed to provide a comfortable sitting position for the user. Also, the
seating article may be configured to provide adequate support to lumbar support to the user seated
on the seating article. The seating article of the present disclosure may provide proper body posture
and adequate lumbar support over variety of seating positions even during prolonged use, thereby
improving spinal health of the user.
The backrest sub-assembly may include a connecting arm. One end of the connecting arm may be
pivotably connectable to a component of the seating article which will be illustrated in the
forthcoming embodiments. The backrest sub-assembly includes a backrest frame that may be
connectable to the connecting arm on an other end of the connecting arm that is opposite to the
one end connected to the component of the seating article. The backrest frame is displaceable
between an extended position and a retracted position. The backrest sub-assembly further includes
a suspension module that may be provided on the other end of the connecting arm opposite to the
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one end. The suspension module may be structured to connect the backrest frame to the connecting
arm and the backrest frame may be displaceable between the extended position and the retracted
position relative to the connecting arm by the suspension module. In the forthcoming paragraphs,
the seating article and the backrest subassembly is illustrated in detail in conjunction with figures.
The following detailed description is merely exemplary in nature and is not intended to limit
application and uses. Furthermore, there is no intention to be bound by any theory presented in the
preceding background or summary or the following detailed description. It is to be understood that
the disclosure may assume various alternative orientations except where expressly specified to the
contrary. It is also to be understood that the specific devices or components illustrated in the
attached drawings and described in the following specification are simply exemplary embodiments
of the inventive concepts defined in the appended claims. Hence, specific dimensions or other
physical characteristics relating to the embodiments that may be disclosed are not to be considered
as limiting, unless the claims expressly state otherwise. Hereinafter, preferred embodiments of the
present disclosure will be descried referring to the accompanying drawings. While some specific
terms directed to a specific direction will be used, the purpose of usage of these terms or words is
merely to facilitate understanding of the present invention referring to the drawings. Accordingly,
it should be noted that the meaning of these terms or words should not improperly limit the
technical scope of the present invention.
Further, the term of approximation such as “substantially” when used in reference to physical
characteristics in the present disclosure, should be understood to contemplate a range of deviations
that would be appreciated by one of ordinary skill in the art to operate satisfactorily for a
corresponding use, function, purpose, or the like. The term “substantially” is a descriptive term
commonly used in disclosures to avoid a strict numerical boundary to the specified parameter. The
term “substantially” should be read in conjunction with the terms “perpendicular”, “central”,
“circular”, “vertical”, etc. Unless the context of the disclosure describes or indicates a different
interpretation, any reference to an object in the specification that is preceded by a definite or
indefinite article, such as 'the', 'a', or 'an', should be understood to encompass both the singular and
the plural forms of the object”. Accordingly, “a” means “at least one/ one or more”. The phrase
“a/an X” may be construed as “at least one/one or more X”.

Also, it is to be understood that the phraseology and terminology used herein is for description and
should not be regarded as limiting. Unless specified or limited otherwise, the terms “connected”
and “coupled” are not restricted to physical or mechanical connections or couplings. It is to be
understood that this disclosure is not limited to the specific assemblies, methods, applications,
conditions, or parameters described and/or shown herein and that the terminology used herein is
to describe particular embodiments by way of example and is not intended to be limiting of the
claimed invention. Hereinafter in the following description, various embodiments will be
described. For purposes of explanation, specific configurations and details are outlined to provide
a thorough understanding of the embodiments. However, it will also be apparent to one skilled in
the art that the embodiments may be practiced without the specific details. Furthermore, wellknown features may be omitted or simplified in order not to obscure the embodiment being
described. Henceforth, the seating article (100) and its components are elucidated in detail making
reference to Fig. (s) 1 to 8 in conjunction.
Referring to Fig. 1 and Fig. 2 which illustrate a side view and a back view of a seating article and
is identified with reference numeral 100. The seating article may provide a person(s) [hereinafter
referred to as user] with a seating surface or a seat, and a back support or back rest. The seating
article (100) may be used in a work environment, including an office space/area or lounge setting.
The term “seating article” refers to an article that may be configurable to support the user engaged
in various tasks. The seating article (100) may be at least one of a chair, a sofa, a couch and like.
In the present disclosure, the seating article (100) may be a reclining chair or a reclining swivel
chair. Thus, the seating article (100) may hereinafter be referred to as the chair and may be
interchangeably used. The chair (100) of the present disclosure among other components may
include a backrest sub-assembly (1), a seat sub-assembly (3), and a control sub-assembly (24). The
backrest sub-assembly (1) may be structured to support back of the user, while the seat subassembly (3) may be configured to accommodate the user in the seating position. In an
embodiment, the control sub-assembly (24) may be integrated with the seat sub-assembly (3) and
may be a unibody component which may be configured to receive the backrest sub-assembly (1).
In another implementation, the seat sub-assembly (3), the control sub-assembly (24), and the
backrest subassembly (1) may be individual components secured to each other without deviating
from the scope of the present disclosure. Each of the backrest sub-assembly (1), the seat sub-
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assembly (3), and the control sub-assembly (24) will be elucidated in the forthcoming paragraphs.
The other components of the chair (100) is not illustrated in detail in the present disclosure and
also not illustrated in figures in order as to not obscure the intricacies of the chair (100) of the
present disclosure.
As described above and referring to Fig. 3 and Fig. 4 illustrates, the backrest sub-assembly (1) may
be structured to support back i.e., cervical region, a thoracic region, a lumbar region of the user.
The backrest sub-assembly (1) of the present disclosure may include a backrest frame (4). The
backrest frame (4) may be made of materials such as but not limiting to metals, non-metals, and
composites. For instance, the backrest frame (4) may be made of aluminum. In yet another
instance, the backrest frame (4) may be made of hard plastics. In an embodiment, the backrest
frame (4) may be made of combination of materials without deviating from the scope of the present
disclosure. The backrest frame (4) may include a top frame portion (4a), and a bottom frame
portion (4b). The top frame portion (4a) and the bottom frame portion (4b) may extend up to a
defined distance in the lateral orientation. That is, the top frame portion (4a) and the bottom frame
portion (4b) may extend away from a midline of the body of the user (considering user’s body for
reference and ease of understanding). Further, the top frame portion (4a) and the bottom frame
portion (4b) being separated by a length (L) [as evident from Fig. 2 and Fig. 3]. The length (L) of
the backrest frame (4) may depend on the user for which it may be structured to accommodate.
That said the length (L) of the backrest frame (4) for a toddler may be different and the length (L)
of the backrest frame (4) for an adult may be different. The backrest frame (4) may define a width
(W). The width (W) may be variable based upon the design of the seating article (100). The
backrest frame (4) further includes at least one curved arm (4c) extending between the top frame
portion (4a) and the bottom frame portion (4b). In another embodiment, the backrest frame (4)
may include at least one non-curved arm, wherein the non-curved arm is a straight arm extending
between the top frame portion (4a) and the bottom frame portion (4b). In an embodiment, the at
least one curved arm (4c) may include a single arm extending from the top frame portion (4a) and
the bottom frame portion (4b). The single arm may extend from between the top frame portion
(4a) and the bottom frame portion (4b) at a substantially central portion or may extend between
diagonal ends of top frame portion (4a) and the bottom frame portion (4b). In another embodiment,
the at least one curved arm (4c) may include a pair of curved arms. The pair of curved arms may

extend between either respective ends or the diagonal ends of the top frame portion (4a) and the
bottom frame portion (4b) without deviating from the scope of the present disclosure. The at least
one curved arm (4c) may be designed to correspond to the cervical region, the thoracic region, the
lumbar region of the user. Although, provision of curved arms is described, the same should not
be limiting to the scope of the present disclosure.
The backrest frame (4) having the top frame portion (4a), the bottom frame portion (4b) and the at
least one curved arm (4c) may be defined with a front face (4e) and a rear face (4f). The front face
(4e) of the backrest frame (4) may be facing the back of the user, while the rear face (4f) may be
facing away from the user. The front face (4e) may be structured to receive a cushioning
component (101). In an implementation, the cushioning component (101) may be a mesh which
may be secured to the front face (4e) of the backrest frame (4). The mesh may configured to support
the back of the user. The mesh may include a plurality of pores that may allow the airflow between
the back of the user and the backrest frame (4). The plurality of pores may be of any size and shape
without deviating from the scope of the present disclosure. In an embodiment, the cushioning
component (101) may be an elastomeric cushioning member (102). The elastomeric cushioning
member (102) will be elucidated in detail in the forthcoming paragraphs of the present disclosure.
The cushioning component (101) provided between the top frame portion (4a), and the bottom
frame portion (4b) is configured to support a curvature of the back of the user in-turn adequately
cushioning the cervical region, a thoracic region, a lumbar region. In an embodiment, the top frame
portion (4a) may be defined with a receiving portion (16) on the rear face (4f) of the backrest frame
(4). The receiving portion (16) may be a slot or a groove that may be configured to receive and
secure the headrest (18). The head rest may be configured to support a portion of the cervical
region of the user. The headrest (18) may be secured to the receiving portion (16) through any
lock. The headrest (18) may be configured to support to the cervical curvature of the back of the
user. In the fort coming paragraph the other components of the backrest sub assembly (1) is
elucidated in detail. In an embodiment, the backrest frame (4) may further include an intermediate
frame portion (4d) defined at a substantially central region between the top frame portion (4a) and
the bottom frame portion (4b). The intermediate frame portion (4d) may protrude curvedly from
the rear face (4f) of the backrest frame (4) and may be substantially parallel to the top frame portion
(4a) and the bottom frame portion (4b). The intermediate frame portion (4d) is defined with a
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connecting shaft (9). The connecting shaft (9) may extend perpendicularly from the intermediate
frame portion (4d) and may be receivable by a suspension module (6). The suspension module (6)
may be enable the displacement of the backrest frame (4) between an extended position (A) [as
illustrated in Fig. 5] and a retracted position (B) [as illustrated in Fig. 6]. In other words, the
backrest frame (4) may be displaceable between the extended position (A) and the retracted
position (B) relative to the suspension module (6). In the extended position (A), the backrest frame
(4) may be in a foremost position [relative to the seat sub-assembly] and in the retracted position,
the backrest frame (4) may be in the rearmost position [relative to the seat sub-assembly].
Reference is now made to Fig. 5 to Fig. 8 in conjunction with Fig(s). 1 to 4, which depict the
suspension module (6) structured to receive the connecting shaft (9) of the backrest frame (4). Said
suspension module (6) may be secured to a connecting arm (2). In an embodiment, the connecting
arm (2) may be defined with a first portion (2c), and a second portion (2d). The first portion (2c)
of the connecting arm (2) may extend rearwardly about a horizontal axis (X-X) up to a defined
distance and may then transition into the second portion (2d) that may extend substantially
vertically from the first portion (2c). The defined distance of the first portion (2c) and the second
portion (2d) may vary according to the dimension of the seating article (100). The connecting arm
(2) may resemble a L-shaped member. One end (2a) of the connecting arm (2) may be pivotably
connectable to the components of the seating article (100). For instance, the one end (2a) of the
connecting arm (2) may be secured to the seat sub-assembly (3) and/or the control sub-assembly
(24). The suspension module (6) may be secured to the connecting arm (2) on an other end (2b)
that may be opposite to the one end (2a) that is connectable to the seating article (100). The
suspension module (6) may include a housing (6a) disposed on the other end of the connecting
arm (2) of the backrest sub assembly (1). In an embodiment, the housing (6a) may be defined
integral to the connecting arm (2). In another embodiment, the housing (6a) may be secured to the
connecting arm (2) on the other end by know joining process without deviating from the scope of
the present disclosure. Shape of the housing (6a) may be substantially cylindrical with a throughhole defined therein. However, other shape of the housing (6a) may be contemplated herein
without deviating from the scope of the present disclosure.
As described above, the housing (6a) may be of cylindrical shape with the through-hole defined
therein. The housing (6a) may be defined with an opening on either ends. One of the opening (6b)

of the housing (6a) may be structured to receive a tensioner (8) and remaining of the opening (6c)
being structured to receive the connecting shaft (9) extending from the backrest frame (4).
Referring to Fig. 8, the housing (6a) may be defined with a key seat (34) about an inner
circumferential surface and may be defined throughout a length of the housing (6a). The key seat
(34) may be structured to receive a key (10) defined on the connecting shaft (9). The key of the
connecting shaft (9) may protrude outwardly from an outer circumferential surface of the
connecting shaft (9) and may be receivable in the key seat (34). The key (10) of the connecting
shaft (9) may engage with the key seat (34) to prevent the rotation of the connecting shaft (9)
relative to the housing (6a). The suspension module (6) may further include a locking unit (12).
The locking unit (12) may be at the region of the housing (6a) defined with the key seat (34). The
locking unit (12) may be rotated to selectively lock the backrest frame (4) between the extended
position (A), the retracted position (B), and one or more positions between the extended position
(A) and the retracted position (B). The locking unit (12) may include a lock pin (36) that may be
displaced between a locking position and an unlocking position by the user of the seating article.
The lock pin (36) may be actuated to the locking position to engage the lock pin (36) with a lock
hole. In an embodiment, the connecting shaft (9) may be defined with a plurality of lock holes
(38). The lock pin (36) may be engageable with any of the lock hole of the plurality of lock holes
(38) to lock the backrest frame (4) between the extended position (A), the retracted position (B),
and any position therebetween.
The suspension module (6) may include at least one resilient member (14). The housing (6a) of
the suspension module (6) may be configured to receive the at least one resilient member (14). The
at least one resilient member (14) may be disposed between the tensioner (8) and the connecting
shaft (9). The at least one resilient member (14) may be a helical spring, conical spring and like.
However, other feasible resilient members may be contemplated herein without deviating from the
scope of the present disclosure. The at least one resilient member (14) may be configured to bias
the backrest frame (4) to the extended position (A) from the retracted position. In an embodiment,
the tension on the resilient member (14) may be increased or decreased based on requirement of
the user. The user may alter the tension on the resilient member (14) through the tensioner (8)
mounted on the housing (6a) based upon the amount of play the user would require from the
backrest frame (4). The tensioner (8) may be rotatable in a clockwise direction and an
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anticlockwise direction. The rotation of the tensioner (8) in the clockwise direction may decrease
the free length of the at least one resilient member (14) thereby increasing the tension of the at
least one resilient member (14). Similarly, the rotation of the tensioner (8) in the anticlockwise
direction may allow the at least one resilient member (14) to recover it’s free length thereby
decreasing the tension of the at least one resilient member. The free length herein may be
contemplated as an actual length of the at least one resilient member (14) when no force is applied
on it. In another embodiment, the suspension module (6) may include at least one of a hydraulic
module or a pneumatic module or an electric module. In a present embodiment, the backrest subassembly (1) may be provided with an auxiliary pad (37). The auxiliary pad (37) may be provided
between the cushioning component (101) and the intermediate frame portion (4d). The auxiliary
pad (37) may provide an extra layer of comfort and support to the lumbar curvature of the back of
the user.
Referring back to Fig. 1 and Fig. 2, the seating article (100) of a present disclosure as disclosed
above, may include the seat sub-assembly (3) that may be configured to accommodate the user in
the seating position. The seat sub-assembly (3) may include a base plate (27) having a top surface
(27a) and a bottom surface (27b). The top surface (27a) of the seat subassembly (3) may be
structured to receive the cushioning component (101). The cushioning component (101) may be
the elastomeric cushioning member (102) and the elastomeric cushioning component (102) is
elucidated in the forthcoming embodiments. Further, the bottom surface (27b) of the seat subassembly may be secured to the control sub-assembly (24). As described above, the control subassembly (24) may be an integral component to the seat sub-assembly (3). In another
implementation, the control sub-assembly (24) may be unitary/individual component that may be
securable to the seat sub-assembly (3) without deviating from the scope of the present disclosure.
The control sub-assembly (24) may be configured to pivotally receive the one end (2a) of the
connecting arm (2) of the backrest sub assembly (1). The control sub-assembly (24) may allow the
backrest sub assembly (1) to swivel between an upright position, a reclined position and one or
more positions between the upright position and the reclined position. Also, the control subassembly (24) may be configured to rotate seat subassembly (3) about a vertical axis (Y-Y). In an
embodiment, the control sub-assembly (24) of the present disclosure may be provided with a
height-adjusting mechanism (22) extending vertically downward from the control sub-assembly

(24). The height-adjusting mechanism may be configured to selectively adjust height of the seat
subassembly (3). The height-adjusting mechanism (22) may be at least one of a hydraulic system
or a pneumatic system. However, other feasible height-adjusting mechanism (22) [for e.g.,
electrical actuators] may be employed without deviating from the scope of the present disclosure.
Further, the control sub-assembly (24) may be provided with one or more levers that may be
configured to lock the backrest subassembly (1) in the upright position, or the reclined position, or
any position between the upright position and the reclined position. The one or more levers may
also aid in increasing or decreasing the height of the seat subassembly (3). The one or more levers
may also be assigned with various functions including but not limiting to locking of rotation of the
seat sub-assembly (3)and the like.
Further, the chair (100) may include a plurality of legs (30) (as evident from Fig. 1 and Fig. 2)
extending substantially perpendicularly from an end of the height-adjusting mechanism (22)
opposite to the end connected to the control sub-assembly (24). A free end of each of the plurality
of legs (30) may be configured to receive a castor wheel (24), thereby enabling the chair (100) to
be displaced from one position to another. The plurality of legs (30) may be structured to support
the seating article (100) on a surface.. In a present disclosure, the chair (100) may include a
handrest (32) that be connected to lateral ends of the base plate (27). The handrest (32) may provide
a comfortable support to the user hands in the sitting position of the user. Also, the height of the
handrest (32) maybe selectively adjustable by the user as per the requirement. In the forthcoming
paragraphs, the cushioning component (101) i.e., the elastomeric cushioning component (102) is
elucidated in conjunction with Fig. 9 and Fig. 10.
The elastomeric cushioning member (102) may be a flexible member having a top surface and a
bottom surface. The top surface is defined as a top cushioning surface (102a) and the bottom
surface is defined as a bottom base surface (102b). The elastomeric cushioning member (102)
includes a plurality of buckling walls (BW) defining a grid structure having an array of openings
(20). The buckling walls (BW) are structured to buckle on application of load for uniformly
distributing the load across the cushioning component (101) and return to an original state upon
removal of the load. As shown in Fig. 8, the cushioning component (101) includes the plurality of
buckling walls (BW) that are kept adjacent to each other to define the non-intersecting
configuration. One of a buckling wall of the plurality of buckling walls (BW) form an angle (α)
18
with an adjacent buckling wall of the plurality of buckling walls (BW) to form the non-intersecting
configuration. Further, the angle (α) may be at least one of an obtuse angle or an acute angle i.e.
the angle may be greater than 90° and less than 180° or the angle may be less than 90°. The nonintersecting configuration of the cushioning component (101) may include shapes such as but not
limiting to at least one of a pentagon, rhombus, hexagon, heptagon, nonagon, decagon and octagon..
The elastomeric cushioning member (102) may be manufactured using an elastomeric material
which may include an elastomeric polymer. The elastomericmaterial may be a gelatinous elastomer
(also referred to in the art as gel, elastomer gel, or elastomeric gel), a thermoplastic elastomer, a
natural rubber, a foam, a polyurethane, a latex, a synthetic elastomer, a blend of natural and
synthetic elastomers, a silica gel, a polymer, a liquid silicon, a polypropylene, a silicon, and any
suitable material that provides durability and elasticity to the elastomeric cushioning member
(102). In an embodiment, the elastomeric cushioning member (102) is manufactured by a
thermoplastic molding process.
In a present disclosure a stabilizing fabric may be secured to at least the top cushioning surface
(102a) and the bottom base surface (102b) of the elastomeric cushioning member (102). The
stabilizing fabric prevents the deformation of the plurality of buckling walls (BW). The chair (100)
having the cushioning component (101) defined with the elastomeric cushioning member (102)
allows object/ user to sink deeply because of the buckling of the grids structure when subjected to
the load while sitting of the user. Further, the dense grid structure provides a surface area to expand
and resist higher load/weights. Further, the cushioning component (101) with the angle between
the buckling walls (BW) to be at least of an obtuse and an acute angle prevents breaking of the
buckling walls during loading, thereby improves usage life of the cushioning component (101).
In an present embodiment, the seating article (100) may be designed to provide a comfortable
sitting position for the user. Also, the seating article may be configured to provide adequate support
to lumbar support to the user seated on the seating article. The seating article of the present
disclosure may provide proper body posture and adequate lumbar support over variety of seating
positions even during prolonged use, thereby improving spinal health of the user.
Equivalents:

With respect to the use of substantially any plural and/or singular terms herein, those having skill
in the art can translate from the plural to the singular and/or from the singular to the plural as is
appropriate to the context and/or application. The various singular/plural permutations may be
expressly set forth herein for sake of clarity.
It will be understood by those within the art that, in general, terms used herein, and especially in
the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms
(e.g., the term “including” should be interpreted as “including but not limited to,” the term
“having” should be interpreted as “having at least,” the term “includes” should be interpreted as
“includes but is not limited to,” etc.). It will be further understood by those within the art that if a
specific number of an introduced claim recitation is intended, such an intent will be explicitly
recited in the claim, and in the absence of such recitation no such intent is present. For example,
as an aid to understanding, the following appended claims may contain usage of the introductory
phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such
phrases should not be construed to imply that the introduction of a claim recitation by the indefinite
articles “a” or “an” limits any particular claim containing such introduced claim recitation to
inventions containing only one such recitation, even when the same claim includesthe introductory
phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or
“an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true
for the use of definite articles used to introduce claim recitations.
In addition, even if a specific number of an introduced claim recitation is explicitly recited, those
skilled in the art will recognize that such recitation should typically be interpreted to mean at least
the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically
means at least two recitations, or two or more recitations). Furthermore, in those instances where
a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction
is intended in the sense one having skill in the art would understand the convention (e.g., “a system
having at least one of A, B, and C” would include but not be limited to systems that have A alone,
B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C
together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.”
is used, in general such a construction is intended in the sense one having skill in the art would
understand the convention (e.g., “a system having at least one of A, B, or C” would include but
20
not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together,
B and C together, and/or A, B, and C together, etc.). It will be further understood by those within
the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms,
whether in the description, claims, or drawings, should be understood to contemplate the
possibilities of including one of the terms, either of the terms, or both terms. For example, the
phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.”
While various aspects and embodiments have been disclosed herein, other aspects and
embodiments will be apparent to those skilled in the art. The various aspects and embodiments
disclosed herein are for purposes of illustration and are not intended to be limiting, with the true
scope and spirit being indicated by the following claims

Referral Numeral:
Referral numerals Description
1 Backrest sub-assembly
2 Connecting arm
2a One end of the connecting arm
2b Other end opposite to the one end of the connecting arm
2c First portion of the connecting arm
2d Second portion of the connecting arm
3 Seat sub-assembly
4 Backrest frame
4a Top frame portion
4b Bottom frame portion
4c At least one curved arm
4d Intermediate frame portion
4e Front face
4f Rear face
6 Suspension module
6a Housing
6b One of the opening of the housing
6c Remaining of the opening of the Housing
8 Tensioner
9 Connecting shaft
10 Key
12 Locking unit
14 Ateast one resilient member
16 Receiving portion
18 Headrest
20 Openings
22 Height adjusting mechanism
24 Control sub-assembly
22
26 Castor wheel
27 Base plate
27a Top surface
27b Bottom surface
30 Legs
32 Handrest
34 Key seat
36 Lock pin
37 Auxiliary Pad
38 Plurality of lock holes
100 Seating Article/Chair
101 Cushioning component
102 Elastomeric cushioning component
102a Top cushioning surface
102b Bottom base surface
L Length of the backrest frame
W Width of the backrest frame
Y-Y Vertical axis
X-X Horizontal Axis

We claim:

1) A backrest sub-assembly (1) for a seating article (100), the sub-assembly (1) comprising:
a connecting arm (2), one end (2a) of the connecting arm (2) pivotably connectable to the
seating article (100);
a backrest frame (4) being connectable to the connecting arm (2) on an other end (2b) opposite
to the one end (2a) and displaceable between an extended position (A) and a retracted position (B);
and
a suspension module (6) structured to connect the backrest frame (4) and the connecting arm
(2), the suspension module (6) being configured to displace the backrest frame (4) between the
extended position (A) and the retracted position (B) relative to the connecting arm (2).

2) The sub-assembly (1) as claimed in claim 1, wherein the backrest frame (4) having a top frame
portion (4a), a bottom frame portion (4b), at least one of arm (4c) extending between the top frame
portion (4a) and the bottom frame portion (4b).

3) The sub-assembly (1) as claimed in claim 1, wherein the connecting arm (2) is defined with a first
portion (2c) extending rearwardly about a horizontal axis (X-X) up to a defined distance and
transitioning into a second portion (2d) extending substantially vertically from the first portion (2c).

4) The sub-assembly (1) as claimed in claim 1, wherein the backrest frame (4) comprises an
intermediate frame portion (4d).

5) The sub-assembly (1) as claimed in claim 1, wherein the suspension module (6) comprises a
housing (6a) secured to the connecting arm (2) and defined with an opening on either ends, one of
the opening of the housing (6a) being structured to receive a tensioner (8) and remaining of the
opening of structured to receive a connecting shaft (9) extending from the intermediate frame
portion (4d).

6) The sub-assembly (1) as claimed in claim 1, wherein the at least one resilient member (14) is
disposed in the housing (6a) between the tensioner (8) and the connecting shaft (9).

7) The sub-assembly (1) as claimed in claim 5, wherein the housing (6a) is defined with a key seat on
an interior circumference of the housing (6a) and the key seat is structured to receive a key of the

connecting shaft (9) protruding outwardly from an outer surface of the connecting shaft (9), wherein
the key seat and the key are structured to prevent the rotation of the connecting shaft (9) with respect
to the housing (6a).

8) The sub-assembly (1) as claimed in claim 1, wherein the suspension module (6) includes a locking
unit (12 ) configured to selectively lock the backrest frame (4) between the extended portion (A)
and the retracted portion (B).

9) The sub-assembly (1) as claimed in claim 5, wherein the tensioner (8) is structured to rotate in a
clockwise direction and an anticlockwise direction to selectively increase or decrease the tension
of the at least one resilient member (14).

10) The sub-assembly (1) as claimed in claim 1, wherein the suspension module (6) is at least one of a
hydraulic system or a pneumatic system.

11) The sub-assembly (1) as claimed in claim 1, wherein the backrest frame (4) is defined with a front
face (4e) structured to receive a cushioning component (101).

12) The sub-assembly (1) as claimed in claim 11, wherein the cushioning component (101) is a mesh
and is receivable on the front face of the backrest frame (4).

13) The sub-assembly (1) as claimed in claim 11, wherein the cushioning component (101) is an
elastomeric cushioning member (102), defined with:
a top cushioning surface (102a); and
a bottom base surface (102b);
wherein, the elastomeric cushioning member (102) comprises a plurality of buckling walls
(BW) of at least one of an intersecting configuration and an non-intersecting configuration defining
a grid structure having an array of openings (20), the plurality of buckling walls (BW) are being
structured to buckle on application of load, for uniformly distributing the load across the cushioning
component (101) and return to an original state upon removal of the load.

14) The sub-assembly (1) as claimed in claim 13, wherein the elastomeric cushioning member (102) is
manufactured from a material including one of an elastomeric material, a thermoplastic elastomer,

a natural rubber, a synthetic elastomer, a blend of natural and synthetic elastomers, silica gel,
polymer, and liquid silicon.

15) The sub-assembly (1) as claimed in claim 13 comprises a stabilizing fabric secured to at least the
top cushioning surface and the bottom base surface of the elastomeric cushioning member.

16) The sub-assembly (1) as claimed in claim 1 comprises an auxiliary pad (37) provided between the
cushioning component (101) and the intermediate frame portion (4d).

17) The sub-assembly (1) as claimed in claim 1, wherein the top frame portion (4a) is defined with a
receiving portion (16) structured to receive and secure a headrest (18).

18) A chair (100), comprising:
a seat sub-assembly (3),
a backrest sub-assembly (1) connected to the seat sub-assembly (3), the sub-assembly (1)
comprising:
a connecting arm (2), one end (2a) of the connecting arm (2) pivotably connectable to
the seating article (100);
a backrest frame (4) being connectable to the connecting arm (2) on an other end (2b)
opposite to the one end (2a) and displaceable between an extended position (A) and a
retracted position (B); and
a suspension module (6) structured to connect the backrest frame (4) and the connecting
arm (2), the suspension module (6) being configured to displace the backrest frame (4)
between the extended position (A) and the retracted position (B) relative to the connecting
arm (2).

19) The chair (100) as claimed in claim 18, wherein the seat sub-assembly (3) comprises a base plate
(27) defined with a top surface (27a) and a bottom surface (27b), wherein the top surface (27a) is
structured to receive a cushioning component (101).

20) The chair (100) as claimed in claim 19 comprises a control sub-assembly (24) disposed on the
bottom surface (27b) of the seat sub-assembly (3) and is configured to receive the connecting arm
(2), wherein the control sub-assembly (24) is configured to recline the backrest sub-assembly (1)
and rotate the seat subassembly (3) about a vertical axis (Y-Y).

21) The chair (100) as claimed in claim 20, wherein the control sub-assembly (24) comprises a heightadjusting mechanism (22) extending vertically downward and configured to selectively adjust the
height of the seat subassembly (3).

22) The chair (100) as claimed in claim 21, wherein the height-adjusting mechanism (22) is at least one
of a hydraulic system or a pneumatic system.

23) The chair (100) as claimed in claim 21 comprises a plurality of legs (30) extending substantially
perpendicularly from the height-adjusting mechanism (22) and a free end of the plurality of legs
(30) is provided with a castor wheels (26).

24) The chair (100) as claimed in claim 18 comprises a handrest (32) connected to lateral ends of the
base plate (27) wherein the height of the handrest (32) is selectively adjusted as per the requirement.

25) The chair (100) as claimed in claim 19, wherein the top surface (27a) of the seat subassembly (3)
is structured to receive a cushioning component (101).

26) The chair (100) as claimed in claim 25, wherein the cushioning component (101) is a mesh and is
receivable on the top surface (27a) of the seat subassembly (3).

27) The chair (100) as claimed in claim 25, wherein the cushioning component (101) is an elastomeric
cushioning member (102), defined with:
a top cushioning surface (102a); and
a bottom base surface (102b);
wherein, the elastomeric cushioning member (102) comprises a plurality of buckling walls
(BW) of at least one of an intersecting configuration and a non-intersecting configuration defining
a grid structure having an array of openings (20), the plurality of buckling walls (BW) are being
structured to buckle on application of load, for uniformly distributing the load across the cushioning
component (101) and return to an original state upon removal of the load.

28) The chair (100) as claimed in claim 25, wherein the elastomeric cushioning member (102) is
manufactured from a material including one of an elastomeric material, a thermoplastic elastomer,
a natural rubber, a synthetic elastomer, a blend of natural and synthetic elastomers, silica gel,
polymer, and liquid silicon.

29) The chair (100) as claimed in claim 25 comprises a stabilizing fabric secured to at least the top
cushioning surface and the bottom base surface of the elastomeric cushioning member.

Dated this 9th day of August 2024