FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10, rule 13]
TITLE: “A DOOR OF A VEHICLE”
NAME AND ADDRESS OF THE APPLICANT:
TATA MOTORS LIMITED of 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001 Maharashtra, India
Nationality: Indian
The following specification particularly describes the invention and the manner in which it is to be performed.

TECHNICAL FIELD
Present disclosure generally relates to a field of automobiles. Particularly, but not exclusively the present disclosure relates to a door of a vehicle. Further, embodiments of the present disclosure discloses a window assembly for the door of the vehicle.
BACKGROUND
Generally, vehicles such as passenger vehicles and commercial vehicles are designed with doors to cover an opening in a body of the vehicle. Typically, such doors of the vehicles are defined with window frames which are configured to receive a window glass or panel. Generally, the door includes a single piece glass to selectively cover the window frame.
A lifting mechanism is provisioned in the door to lift and lower the window glass relative to the window frame. The lifting mechanism is a complex mechanism involving multiple parts which are adapted to slide the glass up and down relative to the window frame. Additionally, a lever or a knob is provided on the door to operate the mechanism and thereby facilitate glass movement. Further, the mechanism requires regular maintenance and is costly to manufacture and assembly due to the complexity of the mechanism, which is undesired. Moreover, the moving parts of the mechanism leads to hazardous environment within the cabin, which calls for covering the mechanism by a door pad. However, addition of the door pad increases the costs involved in manufacturing and complexity during carrying out maintenance, which is again undesired.
Present disclosure is directed to overcome one or more limitations stated above or any other limitations associated with the known 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
The one or more shortcomings of the prior art are overcome by a door as claimed and additional advantages are provided through the features as claimed in 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 and are considered a part of the claimed disclosure.
In a non-limiting embodiment of the disclosure, a door of a vehicle is disclosed. The door includes a body and a window frame defined in the body. The window frame includes a first set of provisions and a second set of provisions. Further, the door includes a window assembly disposed on the body which is configured to displace relative to the window frame. The window assembly includes a first panel which is pivotally connected to the body. The first panel is adapted to arcuately displace along the window frame between a first position and a second position. The first panel in the first position is configured to lock with at least one of the first set of provisions. Furthermore, the window assembly includes a second panel which is pivotally connected to the body. The second panel is adapted to arcuately displace along the window frame between the second position and a third position. This configuration of providing two panels in the window assembly enables partial opening of the window as per requirement of the user/operator. That is, the operator may open only a portion of the window by operating either one of the first panel and the second panel. Additionally, the window assembly enables the operator to selectively open only a portion of the window frame as desired by the operator. Furthermore, the window assembly in the door is simple in construction and easy to manufacture. Also, as the window assembly include less moving parts a door pad is not required thereby decreasing the manufacturing costs of the door. Additionally, the door may be defined with simple profile as there is no requirement to accommodate complex window operating mechanisms.
In an embodiment, the first panel and the second panel are pivotally connected to the body through a fastener.
In an embodiment, the door includes a lever which is coupled to the fastener. The lever is operable to lock the first panel in the first position and second position, and lock the second panel in the third position and the second position.
In an embodiment, the door includes a first locking member which is disposed on the first panel to lock the first panel with at least one of the first set of provisions.

In an embodiment, the door includes a second locking member which is disposed on the second panel to lock the second panel with at least one of the second set of provisions.
In an embodiment, the first locking member and the second locking member is a spring loaded latch.
In an embodiment, the door includes a seal member which is fixed to at least one of the first panel and the second panel.
In an embodiment, the window assembly includes at least one spacer which is disposed on the fastener between the first panel and the second panel.
In an embodiment, the first panel in the first position is adapted to cover a portion of the window frame proximal to a rear end of the door.
In an embodiment, the second panel in the third position is adapted to cover a portion of the window frame proximal to a front end of the door.
In a non-limiting embodiment of the disclosure, a vehicle is disclosed. The vehicle includes a chassis and a vehicle body supported on the chassis. Further, the vehicle includes a door operably coupled to the vehicle body. The door includes a body and a window frame defined in the body. The window frame includes a first set of provisions and a second set of provisions. Further, the door includes a window assembly disposed on the body which is configured to displace relative to the window frame. The window assembly includes a first panel which is pivotally connected to the body. The first panel is adapted to arcuately displace along the window frame between a first position and a second position. The first panel in the first position is configured to lock with at least one of the first set of provisions. Furthermore, the window assembly includes a second panel which is pivotally connected to the body. The second panel is adapted to arcuately displace along the window frame between a third position and the second position. The second panel in the third position is configured to lock with at least one of the second set of provisions.
It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined together 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 FIGURES
The novel features and characteristic 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 perspective view of a door, according to an embodiment of the present disclosure.
Fig. 2, illustrate an exploded view of the door, according to an embodiment of the present disclosure.
Fig. 3 illustrates a side view of a first locking member engaging with a first set of provisions defined in a frame of the door, according to an embodiment of the present disclosure.
Fig. 4 illustrates a side view of a second locking member engaging with a second set of provisions defined in the frame of the door, according to an embodiment of the present disclosure.
Fig. 5 illustrates a side view of a first panel and a second panel pivotally fixed to the door, according to an embodiment of the present disclosure.
Figs. 6a-6c illustrates perspective views of the door with the second panel being operated from a third position and a second position, according to an embodiment of the present disclosure.
Figs. 6d and 6e illustrates perspective views of the door with the first panel being operated between a first position and the second position, according to 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 form 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 method 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.
The terms “comprises”, “comprising”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that an mechanism, assembly, device or method 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 mechanism or device or method. In other words, one or more elements in a device or apparatus or method proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the device or apparatus or method.
Reference will now be made to the exemplary embodiments of the disclosure, as illustrated in the accompanying drawings. Wherever possible, same numerals have been used to refer to the same or like parts. The following paragraphs describe the present disclosure with reference to Figs. 1-6e.

Figs. 1 and 2, are exemplary embodiments of the present disclosure illustrating a door (100) of a vehicle [not shown in Figs]. As an example, the vehicle may be any passenger or a commercial vehicle having a door (100). The vehicle may include a chassis [not shown in Figs] which may be configured to support components of the vehicle and provide stability to the vehicle. Further, the vehicle may include a vehicle body [not shown in Figs]. The vehicle body may be supported on the chassis of the vehicle. The vehicle body may be made of suitably metal and metal alloys as per requirement of the vehicle. In an embodiment, the vehicle body may define a cabin inside which various components of the vehicle may be enclosed. Furthermore, the vehicle may be include a door (100) which may be operably coupled to the vehicle body. The door (100) may be adapted to cover an opening in the vehicle body. In an embodiment, the door (100) may be pivotally fixed to the vehicle body, however, this should not be considered as a limitation as the door (100) may be slidably fixed to the vehicle body as well, based on the vehicle requirement.
As seen in Fig. 1, the door (100) may include a body (1). The body (1) may be manufactured with at least one of a metal, a metal alloy and a non-metal to form the door (100). The body (1) of the door (100) may be defined with a profile which may correspond to a profile of the opening defined in the vehicle body (1). Further, the door (100) may include a window frame (2) which may be defined in the body (1). In an embodiment, the window frame (2) may define a cutout in the door (100) which may form a window. The window frame (2) may be a separate part which may be fixed to the body (1) or may be integrally formed in the body (1) of the door (100). The window frame (2) may be defined with any shape and profile based on the vehicle’s structural requirement. Additionally, the window frame (2) may include a first set of provisions (5a, 5b) and a second set of provisions (6). In an illustrated embodiment, the first set of provisions (5a, 5b) and the second set of provisions (6a, 6b, 6c) may be formed in the window frame (2) proximal to a top portion of the door (100), however, this should not be considered as a limitation as the first set of provisions (5a, 5b) and the second set of provisions (6a, 6b, 6c) may be formed at any location along a peripheral edge of the window frame (2).
Referring again to Fig. 1 along with Fig. 2, the door (100) may include a window assembly (200). The window assembly (200) may be disposed on the body (1) and may be configured to displace relative to the window frame (2). The window assembly (200) may be adapted to cover and uncover the window frame (2) [thus, the window]. The window assembly (200) may include a first panel (3) and a second panel (4) which may be pivotally connected to the body

(1). In an illustrated embodiment, two panels have been illustrated to cover the window frame (2), however, this should not be considered as a limitation as the window assembly (200) may include less than or more than two panels to cover the window frame (2). In an embodiment, the first panel (3) and the second panel (4) may be made of including but not limited to glass, fibres, polymers and the like, which may be capable of covering the window.
Further, the first panel (3) may be adapted to arcuately displace along the window frame (2) between a first position (FP) and a second position (SP). In an embodiment, the first position (FP) may correspond to a position which may be proximal to a top rear portion of the door (100), when the door (100) is fixed to the vehicle body (1). That is, the first panel (3) in the first position (FP) is adapted to cover a portion of the window frame (2) proximal to a rear end of the door (100). Further, the first panel (3) in the first position (FP) is configured to lock with at least one of the first set of provisions (5a, 5b) [as seen in Fig. 3]. In another embodiment, the second position (SP) may correspond to a position which may be proximal to a front portion of the door (100), when the door (100) is fixed to the vehicle body. That is, the first panel (3) in the second position (SP) may be positioned out of the window frame (2) to uncover the window frame (2) [as seen in Fig. 6e]. This configuration of providing two panels in the window assembly (200) enables partial opening of the window as per requirement of the user/operator.
Further, the second panel (4) may be adapted to arcuately displace along the window frame (2) between the second position (SP) and a third position (TP). In an embodiment, the third position (TP) may correspond to a position which may be proximal to a top central portion of the door (100), when the door (100) is fixed to the vehicle body. That is, the second panel (4) in the third position (TP) is adapted to cover a portion of the window frame (2) proximal to a front end of the door (100). Furthermore, the second panel (4) in the third position (TP) is configured to lock with at least one of the second set of provisions (6a, 6b, 6c) [as seen Fig. 4]. Additionally, the second panel (4) in the second position (SP) may be positioned out of the window frame (2) to uncover the window frame (2) [as see in Fig. 6c]. That is, the operator may open only a portion of the window by operating either one of the first panel (3) and the second panel (4). Additionally, the window assembly (200) enables the operator to selectively open only a portion of the window frame (2) as desired by the operator.
Referring now to Fig. 3, the window assembly (200) may include a first locking member (11) which may be disposed on the first panel (3). In an embodiment, the first locking member (11)

may be fixed to an edge of the first panel (3). The first locking member (11) may be configured to selectively lock and unlock the first panel (3) with at least one of the first set of provisions (5a, 5b). Further, as seen in, Fig. 4, the window assembly (200) may include a second locking member (12) which may be disposed on the second panel (4). In an embodiment, the second locking member (12) may be fixed to an edge of the second panel (4). The second locking member (12) may be configured to selectively lock and unlock the second panel (4) with at least one of the second set of provisions (6a, 6b, 6c). In an embodiment, the first locking member (11) and the second locking member (12) may be a latch, which may be suitable for locking and unlocking operation. As an example, the first locking member (11) and the second locking member (12) may be a spring loaded latch, which may require manual force to unlock the first panel (3) and the second panel (4), and may automatically lock the first panel (3) and the second panel (4). Furthermore, as seen in Figs. 6c-6e, the first locking member (11) and the second locking member (12) may also function as a stopper, as the first locking member (11) and the second locking member (12) may come in contact with the window frame (2) when the first panel (3) and the second panel (4) may be in the second position (SP). The first locking member (11) and the second locking member (12) retains the first panel (3) and the second panel (4) at the second position (SP). In an embodiment, the window frame (2) may be defined with a dedicated groove (13) [as seen in Fig. 1] which may be adapted to receive the first locking member (11) and the second locking member (12) when they come in contact with the window frame (2). The groove (13) aids in preventing further displacement of the first panel (3) and the second panel (4) beyond the second position (SP).
Referring now to Figs. 2 and 5, the window assembly (200) may include a fastener (7). The first panel (3) and the second panel (4) may be pivotally connected to the body (1) through the fastener (7). For example, the fastener (7) may be including but not limited to a bolt, a screw, a nut, a rivet, a pin, a shaft and the like. In an embodiment, the first panel (3) and the second panel (4) may be pivotally connected at a portion of the body (1) which may be below the window frame (2) such that first panel (3) and the second panel (4) may be capable of being arcuately displaced to cover and uncover the window frame (2). Further, the first panel (3) and the second panel (4) may be disposed parallel to each other on the fastener (7). Additionally, the window assembly (200) may include at least one spacer (10) which may be disposed on the fastener (7) between the first panel (3) and the second panel (4). In an embodiment, the spacer (10) may be made of including but not limited to a polymeric material, a metallic material, a alloy material, a synthetic material and the like. For example, the at least one spacer (10) may

be provided between the body (1) and the panels, in between the first panel (3) and the second panel (4), and between the panels and the end of the fastener (7). The at least one spacer (10) may be adapted to maintain a gap between each of the first panel (3) and the second panel (4) such that friction between the first panel (3) and the second panel (4) may be mitigated. Furthermore, the spacer (10) may be configured to mitigate any vibrations from being transferred onto the first panel (3) and the second panel (4), thereby decreasing noise, vibrations and harshness (NVH) levels in the vehicle.
Additionally, the window assembly (200) may include a lever (8) [as seen in Figs. 2 and 5]. The lever (8) may be coupled to the fastener (7) and may be positioned on the door (100) which may be facing the cabin. The lever (8) may be operable to lock the first panel (3) at the first position (FP), at the second position (SP), and at any other location between the first position (FP) and the second position (SP). Further, the lever (8) may be operable to lock the second panel (4) at the third position (TP), at the second position (SP), and at any other location between the third position (TP) and the second position (SP). In an embodiment, the lever (8) may be adapted to tighten or loosen the fastener (7), thereby locking or unlocking the first panel
(3) and the second panel (4). That is, upon tightening the fastener (7) by operating the lever (8), the first panel (3) and the second panel (4) may be locked at their respective positions and upon operating the lever (8) to loosen the fastener (7), the first panel (3) and the second panel
(4) may be un-locked. The lever (8) enables a user to secure the first panel (3) and the second panel (4) at the required locations and also ensure that vibrations may be prevented in the first panel (3) and the second panel (4).
In an embodiment, as seen in Figs. 1 and 2, the window assembly (200), may include a seal member (9) which may be fixed to at least one of the first panel (3) and the second panel (4). The seal member (9) may be configured to provide a seal between the first panel (3) and the second panel (4), thereby mitigating unwanted particles and liquids from entering the cabin of the vehicle when the first panel (3) and the second panel (4) may be covering the window frame (2). Additionally, the seal member (9) may facilitate in reducing NVH levels in the cabin of the vehicle.
In embodiment, operation of the window assembly (200) has been illustrated in Figs. 1 and 6a-6e. The window in the covered condition as seen in Fig. 1, corresponds to both the first panel (3) and the second panel (4) to be positioned in the first position (FP) and the third position (TP), respectively. In the first position (FP) the first locking member (11) may be

locked into a provision (5a) of the first set of provisions (5a, 5b) and the second locking member (12) may be locked into a provision (6a) of the second set of provisions (6a, 6b, 6c). In order to operate either the first panel (3) and/or the second panel (4), the operator/user may loosen the fastener (7) by operating the lever (8). Further, upon displacing first panel (3) and/or the second panel (4) to the required position the operator may then operate the lever (8) to tighten the fastener (7). Referring now to Fig. 6a, the operator may operate the second locking member (12) to unlock the second panel (4) from the provision (6a) and may displace the second panel (4) towards the second position (SP) such that the second locking member (12) may latch into a provision (6b) of the second set of provisions (6a, 6b, 6c). This results in positioning the second panel (4) at an intermediate position between the third position (TP) and the second position (SP) and facilitate the operator to partially open the second panel (4). The same way the operator may operate the second locking member (12) and the second panel (4) to lock the second locking member (12) at a provision (6c) based on the operator’s requirement [as seen in Fig. 6b]. This results in positioning the second panel (4) at another intermediate position between the third position (TP) and the second position (SP) and facilitate the operator to partially open the second panel (4). In an embodiment, the operator may also operate the second locking member (12) and the second panel (4) such that the second panel (4) may be disposed at the second position (SP) by resting the second locking member (12) on the window frame (2) [as seen in Fig. 6c]. Furthermore, the operator may operate the second locking member (12) and the second panel (4) in the opposite direction from the second position (SP) to the third position (TP) to cover the window frame (2).
Referring now to Fig. 6d, the operator may operate the first locking member (11) to unlock the first panel (3) from the provision (5a) and may displace the first panel (3) towards the second position (SP) such that the first locking member (11) may latch into a provision (5b) of the first set of provisions (5a, 5b). This results in positioning the first panel (3) at an intermediate position between the first position (FP) and the second position (SP) and facilitate the operator to partially open the first panel (3). The same way the operator may operate the first locking member (11) and the first panel (3) to lock the first locking member (11) at any other provision of the first set of provisions (5a, 5b) based on the operator’s requirement. In an embodiment, the operator may also operate the first locking member (11) and the first panel (3) such that the first panel (3) may be disposed at the first position (FP) by resting the first locking member (11) on the window frame (2) [as seen in Fig. 6e]. Furthermore, the operator may operate the

first locking member (11) and the first panel (3) in the opposite direction from the second position (SP) to the first position (FP) to cover the window frame (2).
In an embodiment, the window assembly (200) in the door (100) is simple in construction and easy to manufacture. Further, the window assembly (200) is easy to operate and maintain. Additionally, the window assembly (200) includes less moving parts and thereby may be provided in the door (100) without hampering aesthetics of the cabin of the vehicle. Also, as the window assembly (200) include less moving parts a door (100) pad is not required thereby decreasing the manufacturing costs of the door (100). Additionally, the door (100) may be defined with simple profile as there is no requirement to accommodate complex window operating mechanisms.
In an embodiment, the window assembly (200) may be retrofitted into existing doors. Further, the first panel (3) and the second panel (4) may be coupled to actuators for electrically operating the window assembly (200).
It should be imperative that the door, the window assembly and any other elements described in the above detailed description should not be considered as a limitation with respect to the figures. Rather, variation to such system and method should be considered within the scope of the detailed description.
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 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 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 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.”
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.
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.

Referral Numerals:

Reference Number Description
100 Door
200 Window assembly
1 Body
2 Frame
3 First panel
4 Second panel
5a, 5b First set of provisions
6a, 6b, 6c Second set of provisions
7 Fastener
8 Lever
9 Seal member
10 Spacer
11 First locking member
12 Second locking member
13 Groove
FP First position
SP Second position
TP Third position

We Claim:
1. A door (100) of a vehicle, comprising:
a body (1);
a window frame (2) defined in the body (1), and having a first set of provisions (5a, 5b) and a second set of provisions (6a, 6b, 6c);
a window assembly (200) disposed on the body (1) and configured to displace relative to the window frame (2), the window assembly (200) comprising;
a first panel (3) pivotally connected to the body (1), the first panel (3) being adapted to arcuately displace along the window frame (2) between a first position (FP) and a second position (SP), wherein the first panel (3) in the first position (FP) is configured to lock with at least one of the first set of provisions (5a, 5b); and
a second panel (4) pivotally connected to the body (1), the second panel (4) adapted to arcuately displace along the window frame (2) between the second position (SP) and a third position (TP), wherein the second panel (4) in the third position (TP) is configured to lock with at least one of the second set of provisions (6a, 6b, 6c).
2. The door (100) as claimed in claim 1, wherein the first panel (3) and the second panel (4) are pivotally connected to the body (1) through a fastener (7).
3. The door (100) as claimed in claim 2, comprising a lever (8) coupled to the fastener (7), the lever (8) is operable to lock the first panel (3) in the first position (FP) and second position (SP), and lock the second panel (4) in the second position and the third position (TP).
4. The door (100) as claimed in claim 1, comprising a first locking member (11) disposed on the first panel (3) to lock the first panel (3) with at least one of the first set of provisions (5a, 5b).
5. The door (100) as claimed in claim 1, comprising a second locking member (12) disposed on the second panel (4) to lock the second panel (4) with at least one of the second set of provisions (6a, 6b, 6c).

6. The door (100) as claimed in claims 4 and 5, wherein the first locking member (11) and the second locking member (12) is a spring loaded latch.
7. The door (100) as claimed in claim 1, comprising a seal member (9) fixed to at least one of the first panel (3) and the second panel (4).
8. The door (100) as claimed in claim 1, wherein the window assembly comprises at least
one spacer (10) disposed on the fastener (7) between the first panel (3) and the second
panel (4).
9. The door (100) as claimed in claim 1, wherein the first panel (3) in the first position (FP) is adapted to cover a portion of the window frame (2) proximal to a rear end of the door (100).
10. The door (100) as claimed in claim 1, wherein the second panel (4) in the third position (TP) is adapted to cover a portion of the window frame (2) proximal to a front end of the door (100).
11. A vehicle, comprising:
a chassis;
a vehicle body supported on the chassis; and
a door (100) operably coupled to the vehicle body, the door (100) comprising:
a body (1);
a window frame (2) defined in the body (1), and having a first set of provisions (5a, 5b) and a second set of provisions (6a, 6b, 6c);
a window assembly (200) disposed on the body (1) and configured to displace relative to the window frame (2), the window assembly (200) comprising;
a first panel (3) pivotally connected to the body (1), the first panel (3) being adapted to arcuately displace along the window frame (2) between a first position (FP) and a second position (SP), wherein the

first panel (3) in the first position (FP) is configured to lock with at least one of the first set of provisions (5a, 5b); and
a second panel (4) pivotally connected to the body (1), the second panel (4) adapted to arcuately displace along the window frame (2) between the second position (SP) and a third position (TP), wherein the second panel (4) in the third position (TP) is configured to lock with at least one of the second set of provisions (6a, 6b, 6c).