FORM 2
THE PATENTS ACT, 1970
[39 OF 1970]
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10; rule 13]
TITLE: “A SUSPENSION DEVICE OF A VEHICLE”
Name and Address of the Applicant:
TATA MOTORS PASSENGER VEHICLES LIMITED; an Indian company having a registered address at Floor 3, 4, Plot-18, Nanavati Mahalaya, Mudhana Shetty Marg, BSE, Fort, Mumbai, Mumbai City, Maharashtra, 400001
Nationality: Indian
The following specification particularly describes the invention and the manner in which it is to be performed.

TECHNICAL FIELD
[001] The present disclosure relates to the field of automobiles. Particularly, but not exclusively, the present disclosure relates to a suspension device of a vehicle.
BACKGROUND OF THE DISCLOSURE
[002] Generally, vehicles are equipped with a shock-absorber or suspension device. The suspension device is configured to isolate the rider from road shocks and vibrations, making the ride more comfortable. The suspension device allows for upward and downward movement of the wheels to absorb shocks and vibrations from rough and uneven roads while the vehicle is in motion. Additionally, the suspension device provides a stable wheel contact with the ground, improving control and steerability.
[003] The suspension device, in general, includes a housing connectable to a vehicle chassis and wheel assembly of the vehicle. The housing includes an upper housing and a lower housing, the lower housing is slidable within the upper housing. Further, the housing defines a chamber configured to store a damping fluid. The suspension device further includes a piston connectable to the upper housing and is configured to reciprocate within the lower housing. The piston divides the chamber into an upper chamber and a lower chamber. The damping fluid is configured to damp the vibration from the wheels and absorb shock. However, during motion of the vehicle in extreme uneven roads, at least one chamber may be subjected to high pressure, resulting in failure of the suspension device.
[004] With the advent of technology, to enhance the damping effect and to effectively absorb shock, various attempts have been made to modify configuration of the suspension device. One such modification in conventional suspension device may be by defining a through hole to fluidically couple the first chamber and the second chamber. Such through hole is configured to allow exchange of damping fluid between the first chamber and the second chamber. Further, a valve may be incorporated proximal to the through hole to selectively open and close the through hole and to regulate the exchange of the damping fluid. However, in such conventional suspension device, there may a possibility of oil leakage when the damping fluid is subjected to a higher pressure. Consequently, there may be an excessive rise in temperature within the chamber due to high pressure. Such high pressure and excessive temperature may affect performance of the suspension device whereby requiring frequent servicing or replacement of the suspension device.

[005] The present disclosure is directed to overcome one or more limitations stated above or any other limitations associated with the aspect of the precleaner of the vehicle.
SUMMARY OF THE DISCLOSURE
[006] One or more shortcomings of the conventional suspension device are overcome by a suspension device of a vehicle, as described. 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 and are considered a part of the claimed disclosure.
[007] In a non-limiting embodiment of the disclosure, a suspension device of a vehicle is disclosed. The suspension device includes a housing having an upper housing and a lower housing. The lower housing is slidable within the upper housing. The suspension device further includes a piston rod suspended within and connected to one end portion of the housing. Furthermore, the suspension device includes a piston connected to an end of the piston rod. The piston is configured to reciprocate inside the lower housing on movement of the lower housing relative to the upper housing. The piston includes a barrier, slidably coupled to an inner wall of the lower housing. The barrier is configured to separate the lower housing into a first chamber and a second chamber. The piston further includes an enclosure connectable to and extendable on either sides of the barrier. The enclosure is defined with a first channel and a second channel, to fluidly interact with the first chamber and the second chamber. In addition, the piston includes a movable body disposable in the enclosure. The movable body being defined with at least one primary conduit and at least one secondary conduit. The at least one primary conduit is in fluid communication with the first channel and the second channel.
[008] In an embodiment, the enclosure is defined with a third channel and a fourth channel, wherein the at least one secondary conduit is in fluid communication with the third channel and the fourth channel.
[009] In an embodiment, the first channel and the fourth channel are defined proximal to a first end of the enclosure, and the second channel and the third channel are defined proximal to a second end of the enclosure.
[0010] In an embodiment, the at least one primary conduit is configured to establish fluid communication with the second channel, when pressure of the damping fluid in the first chamber exceeds a first predetermined pressure value.

[0011] In an embodiment, the at least one secondary conduit is configured to establish fluid communication with the fourth channel, when pressure of the damping fluid in the second chamber exceeds a second predetermined pressure value.
[0012] In an embodiment, the barrier is defined with at least one check valve configured to exchange damping fluid between the first chamber and the second chamber.
[0013] In an embodiment, the enclosure comprises at least one resilient member positioned within and connectable to the at least one end of the enclosure.
[0014] In an embodiment, a base valve positioned within the lower housing and proximal to the second end of the housing.
[0015] In an embodiment, downward movement of the piston exerts pressure on damping fluid in the second chamber, due to which the movable body moves upward within the lower housing to transfer the damping fluid from the second chamber to the first chamber.
[0016] In an embodiment, upward movement of the piston exerts pressure on damping fluid in the first chamber, due to which the movable body moves downward within lower housing to transfer the damping fluid from the first chamber to the second chamber.
[0017] 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
[0018] The novel features and characteristics of the disclosure are set forth in the appended description. 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:
[0019] Figure 1 illustrates a sectional view of a suspension device of a vehicle, according to an embodiment of the present disclosure.

[0020] Figure 2 illustrates a sectional view of a piston of the suspension device of Figure 1, according to an embodiment of the present disclosure.
[0021] Figure 3 illustrates a magnified sectional view of the piston when pressure of the damping fluid in a first chamber and a second chamber are within a predetermined pressure value, according to an embodiment of the present disclosure.
[0022] Figure 4 illustrates a magnified sectional view of the piston when pressure of the damping fluid in the second chamber exceeds predetermined pressure value, according to an embodiment of the present disclosure.
[0023] Figure 5 illustrates a magnified sectional view of the piston when pressure of the damping fluid in the first chamber exceeds predetermined pressure value, according to an embodiment of the present disclosure.
[0024] Figure 6 illustrates a comparative chart of damping characteristics, according to an embodiment of the present disclosure.
[0025] 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 precleaner assembly and the air intake system illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
[0026] While the embodiments in the disclosure are subject to various modifications and alternative forms, specific embodiments thereof have been shown by the way of example in the figures and will be described below. It should be understood, however that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternatives falling within the scope of the disclosure.
[0027] It is to be noted that a person skilled in the art would be motivated from the present disclosure and modify various features of the suspension device, without departing from the scope of the disclosure. Therefore, such modifications are considered to be part of the disclosure. Accordingly, the drawings show only those specific details that are pertinent to understand the embodiments of the present disclosure, so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skilled in the art having benefit of the description herein. Also, the suspension device of the present disclosure may be employed in any kind of vehicles including commercial vehicles, passenger vehicles, two-wheeled vehicles,

three-wheeled vehicles, and among others. However, no vehicle is illustrated in the drawings of the disclosure is for the purpose of simplicity.
[0028] The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover non-exclusive inclusions, such that a device, assembly, mechanism, system, and method that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, or assembly, or device. In other words, one or more elements in a device proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the device.
[0029] The phrase “fluidically connected” used in the disclosure signifies the transfer of fluid from one component/element to another directly by means of groves, channels, cuts, trench, and among others, or indirectly by means of intermediate components/elements, such as, but not limited to hoses, channels, canals, tubes, and among others.
[0030] Embodiments of the present disclosure discloses a suspension device of a vehicle. The suspension device includes a housing having an upper housing and a lower housing. The lower housing is slidable within the upper housing. The suspension device further includes a piston rod suspended within and connected to one end portion of the housing. Furthermore, the suspension device includes a piston connected to an end of the piston rod. The piston is configured to reciprocate inside the lower housing on movement of the lower housing relative to the upper housing. The piston includes a barrier, slidably coupled to an inner wall of the lower housing. The barrier is configured to separate the lower housing into a first chamber and a second chamber. The piston further includes an enclosure connectable to and extendable on either sides of the barrier. The enclosure is defined with a first channel and a second channel, to fluidly interact with the first chamber and the second chamber. In addition, the piston includes a movable body disposable in the enclosure. The movable body being defined with at least one primary conduit and at least one secondary conduit. The at least one primary conduit is in fluid communication with the first channel and the second channel. Such configuration of the suspension device of the present disclosure provides additional channel for the flow of damping fluid between the first chamber and the second chamber, thereby limiting overall high forces within the housing of the suspension device.
[0031] The following paragraphs describe the present disclosure with reference to Figures. 1 to 6. In the figures, the same element or elements which have similar functions are indicated

by the same reference signs. With general reference to the drawings, the suspension device of a vehicle is illustrated and generally identified with reference numeral (200). The suspension device (200) may be operatively associated with the vehicle [not shown]. It will be understood that the teachings of the present disclosure are not limited to any particular vehicle and may be employed in a myriad of category of vehicles including, but not limited to, commercial vehicles, passengers, vehicles, and among others.
[0032] As illustrated in Figures 1 and 2, the suspension device (200) includes a housing (201) having an upper housing (202) and a lower housing (203), both the upper housing (202) and the lower housing (203) being defined with a profile, such as, but not limited to, a cylindrical profile, a square profile, a rectangular profile, a cuboidal profile, a polyhedral profile, and among others. The lower housing (203) is slidable within the upper housing (203). The suspension device (200) further includes a piston rod (204) suspended within and connected to one end portion (201a) of the housing (201) by at least one of fastening, press fitting, cotter joining, welding, brazing, soldering, riveting, and among others. Furthermore, the suspension device (200) includes a piston (206) connected to an end of the piston rod (204). The piston (206) is configured to reciprocate inside the lower housing (203) on movement of the lower housing (203) relative to the upper housing (202). The piston (206) includes a barrier (11), slidably coupled to an inner wall (1) of the lower housing (203). The barrier (11) is configured to separate the lower housing (203) into a first chamber (3) and a second chamber (4). The piston (206) further includes an enclosure (2) connectable to and extendable on either sides of the barrier (11). In an embodiment, the lower housing (203) and the upper housing (203) are cylindrical in shape. The diameter of the lower housing (203) is lesser than the diameter the upper housing (203). Further, the lower housing (203) may be made of concentric cylindrical tubes.
[0033] In addition, the suspension device (200) includes a base valve (205) positioned within the lower housing (203) and proximal to a second end (2b) of the housing (201). In one embodiment, a first end (201a) of the suspension device (100) may be coupled to a chassis of the vehicle and the second end (201b) may be coupled to a steering knuckle of the vehicle. Also, such coupling may be by means of at least one of fastening, press fitting, cotter joining, welding, brazing, soldering, riveting, and among others. However, the suspension device (200) may be coupled to any other components of the vehicle based on the requirement, for instance, to an axle of the vehicle. Therefore, such coupling of the suspension device (200) to the vehicle cannot be considered as limitation of the present disclosure.

[0034] As depicted in Figure 3, the barrier (11) is defined with at least one check valve (12) configured to exchange damping fluid between the first chamber (3) and the second chamber (4). Further, the enclosure (2) of the piston (206) is defined with a first channel (7) and a second channel (10), to fluidly interact with the first chamber (3) and the second chamber (4). In addition, the enclosure (2) is defined with a third channel (8) and a fourth channel (9). The first channel (7) and the fourth channel (9) are defined proximal to the first end (2a) of the enclosure (2). The second channel (10) and the third channel (8) are defined proximal to the second end (2b) of the enclosure. The damping fluid is configured to dampen at least one of vibrations, impact, and shock received from the wheels of the vehicle. The damping fluid may be air, synthetic oil, mineral oil, smart fluids such as electrorheological (ER) fluids and magnetorheological (MR) fluid, silicon oil, and among others.
[0035] The piston (206) further includes a movable body (13) disposable in the enclosure (2). The movable body (13) may be defined with at least one primary conduit (14) and at least one secondary conduit (15). In addition, the enclosure (2) includes at least one resilient member (5, 6) positioned within and connectable to the at least one end (2a, 2b) of the enclosure. In an illustrative embodiment, as depicted in Figure 3, the enclosure (2) includes a first resilient member (5) and a second resilient member (6). The first resilient member (5) is positioned within and connectable to the first end (2a) of the enclosure (2) and the second resilient member (6) is positioned within and connectable to the second end (2b) of the enclosure (2). The at least one resilient member (5, 6) is configured to store energy when the at least one resilient member (5, 6) is subjected to a compressive force, i.e., upward/downward movement of the movable body (13), and release the stored energy once compression force is withdrawn.
[0036] The at least one secondary conduit (15) may be in fluid communication with the third channel (8) and the fourth channel (9) as depicted in Figure 4. The at least one secondary conduit (15) is configured to establish fluid communication with the fourth channel (9), when pressure of the damping fluid in the second chamber (4) exceeds a second predetermined pressure value. In an operational embodiment, when the piston (206) is adapted to move downward with certain velocity, the piston (206) may be configured to exert pressure on damping fluid in the second chamber (4), due to which the movable body (13) tends to move in an upward direction within the lower housing (203), to transfer the damping fluid from the second chamber (4) to the first chamber (3). In other words, when the piston (206) moves in a downward direction, the damping fluid in the second chamber (4) is subjected to higher pressure than a normal pressure of the damping fluid. The high pressure exerts high force on

the movable body (13) proximal to the second end (2b) of the enclosure (2). Due to such higher force, the movable body (13) is adapted to move upward within the enclosure (2) by compressing the first resilient member (5). The at least one secondary conduit (15) of the movable body (13) is configured to establish fluid communication with the fourth channel (9), when the force reaches or exceeds the second predetermined force value, and thereby transferring the damping fluid from the second chamber (4) to the first chamber (3).
[0037] As depicted in Figure 5, the at least one primary conduit (14) may be in fluid communication with the first channel (7) and the second channel (10). The at least one primary conduit (14) is configured to establish fluid communication with the second channel (10), when pressure of the damping fluid in the first chamber (3) tends to exceed a first predetermined pressure value. In an operational embodiment, when the piston (206) is adapted to move in the upward direction with a predefined velocity, the piston (206) tends to exert pressure on the damping fluid in the first chamber (3), due to which the movable body (13) may move in the downward direction within the lower housing (203) to transfer the damping fluid from the first chamber (3) to the second chamber (4). In other words, when the piston (206) moves upward, the damping fluid in the first chamber (3) is subjected to higher pressure than the normal pressure of the damping fluid. The high pressure exerts high force on the movable body (13) proximal to the first end (2a) of the enclosure (2). Due to such higher force, the movable body
(13) moves downward within the enclosure (2) by compressing the second resilient member
(6). When the force reaches or exceeds a first predetermined force value, the at least one
primary conduit (14) of the movable body (13) is configured to establish fluid communication
with the second channel (10) and thereby transferring the damping fluid from the first chamber
(3) to the second chamber (4). Due to such transfer of the damping fluid as described above
with respect to the Figures 4 and 5, temperature of the damping fluid can be maintained, i.e.,
excessive rise in temperature can be avoided, thereby mitigating oil seal leakages within the
suspension device (200).
[0038] In an illustrative embodiment as depicted in Figures 4 and 5, both the at least one primary conduit (14) and the at least one secondary conduit (15) includes one transverse channel and one longitudinal channel. However, such configuration of the conduits (14, 15) cannot be considered as limitation of the present disclosure. The at least one primary conduit
(14) and the at least one secondary conduit (15) may include at least one of a curved profile, a
wavy profile, a zig-zag profile, a serpentine profile, and among others.

[0039] Such transfer of damping fluid as explained above provides additional channels for the flow of damping fluid between the first chamber (3) and the second chamber (4), thereby limiting overall high forces within the housing of the suspension device (200) as depicted in Figure 6. When the piston (206) is moved with high velocity, for instance, when the vehicle is moving in an uneven terrain or encounters an obstacle or pothole on said terrain, the suspension device (200) of the present disclosure is configured to limit the overall high forces, thereby maintaining temperature of the damping fluid, i.e., avoiding excessive rise in temperature, in turn mitigating oil seal leakages within the suspension device (200). In an illustrative embodiment, as depicted in Figure 6, the damping characteristics of the suspension device (200) of the present disclosure is limited within the range of approximately +100 kgf (compression force) and -150 kgf (rebound force) for any velocities higher than 1.5 m/s during compression and 1 m/s during rebound, respectively. In other words, the second predetermined force value is approximately 100 kgf, upon which the damping fluid is configured to transfer to the first chamber (3) from the second chamber (4) by means of the at least one secondary conduit (15). In similar way, the first predetermined force value is approximately -150 kgf, upon which the damping fluid is configured to transfer to the second chamber (4) from the first chamber (3) by means of the at least one primary conduit (14).
[0040] In an embodiment, the suspension device (200) of the present disclosure provides additional channel for the flow of damping fluid between the first and the second chambers, thereby limiting overall high forces within the housing of the suspension device (200). Such configuration of the suspension device (200) facilitates in maintaining temperature of the damping fluid, i.e., avoid excessive rise in temperature, thereby mitigating oil seal leakages within the suspension device (200). The suspension device (200) provides better control over handling frequencies, for instance <5Hz, and rest of the frequencies can be shorted. In addition, such configuration of the suspension device (200) improves the damping effect and shocks absorbing effect, thereby providing extreme comfort to the rider of the vehicle.
[0041] It is to be understood that a person of ordinary skill in the art may develop a suspension device (200) of similar configuration without deviating from the scope of the present disclosure. Such modifications and variations may be made without departing from the scope of the present invention. Therefore, it is intended that the present disclosure covers such modifications and variations provided they come within the ambit of the appended claims and their equivalents.

EQUIVALENTS
[0042] 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.
[0043] In addition, where features or aspects of the disclosure are described in terms of Markush groups, those skilled in the art will recognize that the disclosure is also thereby described in terms of any individual member or subgroup of members of the Markush group.
[0044] 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.
[0045] 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 includes the 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 suspension device (200)) having at least one of A, B, and C” would include but not be limited to device 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 suspension device (200) having at least one of A, B, or C” would include but not be limited to pistons 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 NUMERICALS

Numerical Particulars
1 Inner wall of the lower housing
2 Enclosure
2a First end of the enclosure
2b Second end of the enclosure
3 First chamber
4 Second chamber
5 First resilient member
6 Second resilient member
7 First channel

8 Third channel
9 Fourth channel
10 Second channel
11 Barrier
12 At least one check valve
13 Moveable body
14 At least one primary conduit
15 At least one secondary conduit
200 Suspension device
201 Housing
201a First end of the housing
201b Second end of the housing
202 Upper housing
203 Lower housing
204 Piston rod
205 Base valve
206 Piston

We claim:
1. A suspension device (200) of a vehicle, the suspension device (200) comprising:
a housing (201) comprises an upper housing (202) and a lower housing (203), the lower housing (203) is slidable within the upper housing (202);
a piston rod (204) suspended within and connected to one end portion (201a) of the housing (201);
a piston (206) connected to an end of the piston rod (204), the piston (206) being
configured to reciprocate inside the lower housing (203) on movement of the lower
housing (203) relative to the upper housing (202), wherein the piston (206) comprising:
a barrier (11), slidably coupled to an inner wall (1) of the lower housing
(203), the barrier (11) configured to separate the lower housing (203) into a first
chamber (3) and a second chamber (4);
an enclosure (2) connectable to and extendable on either sides of the
barrier (11), the enclosure (2) defined with a first channel (7) and a second
channel (10), to fluidly interact with the first chamber (3) and the second
chamber (4); and
a movable body (13) disposable in the enclosure (2), the movable body
(13) being defined with at least one primary conduit (14) and at least one
secondary conduit (15), wherein the at least one primary conduit (14) is in fluid
communication with the first channel (7) and the second channel (10).
2. The suspension device (200) as claimed in claim 1, wherein the enclosure (2) defined with a third channel (8) and a fourth channel (9), wherein the at least one secondary conduit (15) is in fluid communication with the third channel (8) and the fourth channel (9).
3. The suspension device (200) as claimed in claim 1, wherein the first channel (7) and the fourth channel (9) are defined proximal to a first end (2a) of the enclosure (2), and the second channel (10) and the third channel (8) are defined proximal to a second end (2b) of the enclosure (2).
4. The suspension device (200) as claimed in claim 1, wherein the at least one primary conduit (14) is configured to establish fluid communication with the second channel

(10), when pressure of the damping fluid in the first chamber (3) exceeds a first predetermined value.
5. The suspension device (200) as claimed in claim 1, wherein the at least one secondary conduit (15) is configured to establish fluid communication with the fourth channel (9), when pressure of the damping fluid in the second chamber (4) exceeds a second predetermined value.
6. The suspension device (200) as claimed in claim 1, wherein the barrier (11) is defined with at least one check valve (12) configured to exchange damping fluid between the first chamber (3) and the second chamber (4).
7. The suspension device (200) as claimed in claim 1, wherein the enclosure (2) comprises at least one resilient member (5, 6) positioned within and connectable to the at least one end (2a, 2b) of the enclosure (2).
8. The suspension device (200) as claimed in claim 1, comprises a base valve (205) positioned within the lower housing (203) and proximal to the second end of the housing (201b).
9. The suspension device (200) as claimed in claim 1, wherein downward movement of the piston (206) exerts pressure on damping fluid in the second chamber (4), due to which the movable body (13) moves upward within the lower housing (203) to transfer the damping fluid from the second chamber (4) to the first chamber (3).
10. The suspension device (200) as claimed in claim 1, wherein upward movement of the piston (206) exerts pressure on damping fluid in the first chamber (3), due to which the movable body (13) moves downward within lower housing (203) to transfer the damping fluid from the first chamber (3) to the second chamber (4).