THE PATENTS ACT 1970 [39 OF 1970] AND The Patents Rules, 2003 COMPLETE SPECIFICATION [See section 10 and rule 13] TITLE OF THE INVENTION A WHEEL CHOCK FOR A VEHICLE APPLICANT(S) TATA MOTORS LIMITED an Indian company having its registered office at Bombay house, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001, Maharashtra, India. PREAMBLE TO THE DESCRIPTION The following specification particularly describes the invention and the manner in which it is to be performed.

TITLE OF THE INVENTION
A WHEEL CHOCK FOR A VEHICLE
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wheel chock for a vehicle and more particularly, the present invention relates to the wheel chock for the vehicle especially to chock the tires of different size for any moving vehicle including commercial vehicles like trucks etc.
BACKGROUND OF THE INVENTION
It is a common knowledge within the field that the wheel chocks are useful for preventing or making it more difficult for a vehicle, such as a truck, to start moving unintentionally when parked on a small slope or hill. When used, the wheel chocks are usually moved from a storage space on the vehicle to a suitable position at the wheels. Wheel chocks for vehicles are designed according to different principles. One variant is made in one piece probably of rubber having a shape which is suitable to be placed behind a vehicle wheel. Another variant is the one which with stripped metals form different legs of the chock. Both these type of chocks are specific to one type of tire and therefore cannot be used for tires of different sizes. For example, a wheel chock for trucks cannot be used for passenger cars, as a result separate wheel chocks are constructed for each category of vehicle that needs huge machinery to set up and also additional cost to manufacture.
The US patent publication US6478525B2 discloses a wheel chocking device which includes a base member to be positioned on the driveway and a guide member, which is longitudinal to the base member. The wheel chocking device also includes a chock positioned laterally outward relative to the base member and

is connected to the guide member. The wheel of any dimension can be chocked by this wheel chock when the wheel is received on the base member by moving the guide member. However, there is a limitation with the wheel chocking device of US document, that the length of the chocking remains the same and only horizontal movement is available to entire chock by moving guide member. Since the dimension of the chock remains the same, the choking device may not be able to stop or prevent the back roll of the vehicle efficiently when compared to a chock for passenger vehicle with that of trucks or heavy vehicles.
Therefore, the problem to be solved is to provide a wheel chock for a vehicle that provides a variable length for receiving and chocking tires of different dimension ranging from a car to heavy trucks etc. and the problem is solved in the present invention by a wheel chock that includes a wheel engaging member to receive or engage with the wheel, a first and a second member movably connected with each other and with the wheel engaging member. The wheel chock includes an adjustable mechanism, which is structured in at least any one of wheel engaging member, first and second member. The adjustable mechanism comprises of first and second sliding member such that in order to vary the length of the members of the wheel chock, the first sliding member receives second sliding member and engages by an engaging member when openings on the second sliding member receives the engaging member for engaging the first and the second sliding member to vary the length of at least one of wheel engaging member, first member and the second member.
OBJECTS OF THE DISCLOSURE
One object of the present disclosure is to provide a wheel chock of a vehicle with variable lengths of wheel engaging member, first and the second member to receive wheel of varying dimensions.

Another object of the present disclosure is to provide a wheel chock of a vehicle with locking plates to support the wheel engaging member to receive the wheel of any dimensions.
BRIEF SUMMARY OF THE INVENTION
An embodiment of the present invention discloses a wheel chock for a vehicle comprising: a wheel engaging member configured to receive a wheel of the vehicle; a first member having a first end movably connected with one end of said wheel engaging member; a second member having a first end movably connected to said first member and a second end movably connected to other end of the wheel engaging member; and an adjustable mechanism structured on at least one of said wheel engaging member, said first member and said second member to vary length of at least one of said wheel engaging member, said first member and said second member to receive the wheel of different dimensions, said adjustable mechanism includes a first sliding member and a second sliding member such that said first sliding member is structured to receive and circumferentially cover said second sliding member, said second sliding member includes a plurality of opening to receive an engaging member structured on said first sliding member to engage said first sliding member with said second sliding member with desired length, wherein said first sliding member receives said second sliding member such that one of the opening on said second sliding member receives said engaging member to engage said first sliding member with said second sliding member forming desired length of at least one of said wheel engaging member, said first member and said second member.
In an embodiment of the present invention the wheel engaging member includes said adjustable mechanism to vary length of said wheel engaging member.
In an embodiment of the present invention the wheel engaging member, said first member and said second member include said adjustable mechanism to vary

length of said wheel engaging member, said first member and said second member.
In an embodiment of the present invention the first end of the first member is movably connected with one end of said wheel engaging member by a hinge joint to form a foldable connection.
In an embodiment of the present invention the first end of the second member is movably connected with said first member by a hinge joint to form a foldable connection.
In an embodiment of the present invention the second end of the second member is movably connected with the wheel engaging member by a hinge joint to form a foldable connection.
In an embodiment of the present invention the second member includes a hinge joint to enable folding of said second member.
In an embodiment of the present invention the first member includes a hinge joint forming a movable contact of said first member with a first locking plate.
In an embodiment of the present invention the second member includes a first stopper to lock said first locking plate for supporting said second member.
In an embodiment of the present invention the first locking plate includes said adjustable mechanism to vary length of said first locking plate.
In an embodiment of the present invention the wheel engaging member includes a hinge joint forming a movable contact of said wheel engaging member with a second locking plate.

In an embodiment of the present invention the first member includes a plurality of second stopper to support said wheel engaging member against said wheel by locking said second locking plate on said first member.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING(S)
FIG. 1 discloses an embodiment of the present invention depicting perspective view of the wheel chock in open condition.
FIG. 2 discloses an embodiment of the present invention depicting side view of the adjustable mechanism structured on the wheel engaging member.
FIG. 3 discloses an embodiment of the present invention depicting side view of the adjustable mechanism.
FIG. 4 discloses an embodiment of the present invention depicting side view of the wheel chock in folded condition.
Reference Numeral

Reference Numeral Description
Wheel Chock 10
Wheel engaging member 20
First member 30
Second member 40
Adjustable Mechanism 50
First sliding member 52
Second sliding member 54
Opening 56
Engaging member 58
Hinge joint 60
First locking plate 70
First Stopper 80
Second locking plate 90
Second stopper 92
DETAILED DESCRIPTION OF THE INVENTION
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 structures 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 spirit and 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.
An embodiment of the present invention discloses a wheel chock (10) for a vehicle. The wheel chock (10) for the vehicle comprises of three members including a wheel engaging member (20), a first member (30) and a second member (40). The wheel engaging member (20) is a diagonal member which is configured to receive the wheel of the vehicle. The first member (30) is the horizontal member that is in contact with the ground while supporting the wheel of the vehicle. The second member (40) is the vertical member angled from the first member (30). The first member (30) can be perpendicular to the second member (40) or at any other angle from the first member (30). The first end of the first member (30) is movably connected with one of the two ends of the wheel engaging member (20) by a hinge joint (60). The hinge joint (60) between the 5 wheel engaging member (20) and the first member (30) make them foldable over each other. The other end of the wheel engaging member (20) is also movable connected with the second member (40) by the hinge joint (60). The hinge joint (60) between the second member (40) and the wheel engaging member (20) make them foldable over each other. Both the first member (30) and the second member (40) also movably connected to each other by a hinge joint (60), thereby making them also foldable over each other.
The wheel chock (10) also comprises of an adjustable mechanism (50) which makes the length of the members’ variable i.e. the length of the wheel engaging member (20) or first member (30) or second member (40) can be varied as per the size of the wheel or tire. The adjustable mechanism (50) can be structured on at least any one of the wheel engaging member (20), first member (30) and a second member (40). In the present invention, the adjustable mechanism (50) is structured on wheel engaging member (20), first member (30) and second member 20 (40). Thereby, making the length of these three members variable to receive tyre of any dimension as desired.
The second member (40) as shown in Fig. 1, is a two part structure such that the second member (40) can be folded from somewhere near the centre to reduce the size or length of the second member (40) all together for its folding. The second member includes a hinge joint (60) at the centre or near the centre that makes the second member (40) foldable from the centre, thereby reducing overall length of the second member (40) while folding wheel chock (10). The first member (30) also includes a hinge joint (60) to form a movable contact with a first locking plate. The first locking plate is an elongated structure which from one end is hinged on the first member (30) and the other end is open or free. The second member (40) includes a first stopper (80) which receives the free end of the first locking plate (70) to lock the first locking plate (70) for supporting the second member (40) when the wheel chock (10) receives the wheel. The first stopper (80) is a projection shaped structure on the inner surface of the second member (40)which locks the first locking plate (70). The first locking plate (70) also includes an adjustable mechanism (50) to vary the length of the first locking plate (70) with the length of the second member (40) i.e. if the length of the second member (40) is increased in case of wheels with larger size, the length of the first locking plate (70) is also increased to ensure proper locking of the first locking plate (70) with 10 the second member (40) and vice versa. This enables efficient support to the second member (40) by the first locking plate (70).
The wheel engaging member (20) of the wheel chock (10) as shown in Fig. 1, includes a hinge joint (60) near its centre which forms a movable contact of the wheel engaging member (20) with the second locking plate (90). The hinge joint (60) between the wheel engaging member (20) and the second locking plate (92) enables free movement of the second locking plate (90) as only one end of the second locking plate (90) is hinged with the wheel engaging member (20) whereas the other end is free or open. The first member (30) includes a plurality of second stopper (92) structured on the surface of the first member (30) at predefined distances. The second stopper (92) are a projected surface to receive and lock the free end of the second locking plate (90) and thereby ensuring supporting of the wheel engaging member (20) when the wheel engaging member (20) receives the wheel of the vehicle.
As shown in Fig 2, the wheel engaging member (20) is a diagonal and flexible structure to engage with the wheel of the vehicle. The wheel engaging member (20) also includes the adjustable mechanism (50) to vary the length of the wheel engaging member (20) based on the size or dimension of the wheel or tyre. Based 30 on the length of the wheel engaging member (20), the second locking plate (90) is

locked by one of the plurality of the second stopper (92) to ensure that the wheel
engaging member (20) has sufficient support to engage with the wheel of the vehicle.
As shown in Fig. 3, the adjustable mechanism (50) includes a first sliding member 5 (52) and a second sliding member (54). The first sliding member (52) is a longitudinal structure with size or dimension greater than the second sliding member (54) such that the first sliding member (52) can receive the second sliding member (54) in a way to circumferentially cover the second sliding member (54) up to an extent as desired. The second sliding member (54) includes a plurality of 10 opening (56) on its surface, whereas the first sliding member (52) includes an engaging member (58), which is a longitudinal structure. The opening (56) on the second sliding member (54) receives the engaging member (58) to engage the first sliding member (52) with the second sliding member (54). For example, in cases where the greater length is desired, the engaging member (58) is received by the 15 opening (56) which is closest from the first sliding member (52), thereby making rest of the opening (56) not covered by the first sliding member (52). In such case, the engaging member (58) engages first sliding member (52) with the second sliding member (54) to form a greater length as desired. In cases where, shorter length is desired, the engaging member (58) is received by the opening (56) of the 20 second sliding member (54) which is farthest from the first sliding member (52), thereby enabling covering of the remaining opening (56) by the first engaging member (58). In this case, the engaging member (58) will engage the first sliding member (52) with the second sliding member (54) to provide shortest length as desired. 25
As shown in Fig. 4, the wheel chock (10) can be folded and easily stored in the vehicle unlike conventional wheel chocks which are bolted on the chassis. The hinge joint (60) between different members enables folding of the wheel chock (10). The hinge joint (60) on the second member (40) enables folding of the 30 second member (40) into two parts i.e. one covering the other, whereas the hinge 11

joint (60) between the first member (30) and the second member (40) enables folding of the second member (40) on the first member (30). The first stopper (80) and the second stopper (92) can release or unlock the first locking plate (70) and the second locking plate (90) respectively. Further, the first locking plate (70) is hinged on the first member (30) and the second locking plate (90) hinged on the 5 wheel engaging member (20) fold accordingly to enable folding of the wheel chock (10).
We Claim:
1. A wheel chock (10) for a vehicle comprising:

a wheel engaging member (20) configured to receive a wheel of the vehicle;
a first member (30) having a first end movably connected with one end of said wheel engaging member (20);
a second member (40) having a first end movably connected to said first member (30) and a second end movably connected to other end of the wheel engaging member (20); and
an adjustable mechanism (50) structured on at least one of said wheel engaging member (20), said first member (30) and said second member (40) to vary length of at least one of said wheel engaging member (20), said first member (30) and said second member (40) to receive the wheel of different dimensions, said adjustable mechanism (50) includes a first sliding member (52) and a second sliding member (54) such that said first sliding member (52) is structured to receive and circumferentially cover said second sliding 15 member (54), said second sliding member (54) includes a plurality of opening (56) to receive an engaging member (58) structured on said first sliding member (52) to engage said first sliding member (52) with said second sliding member (54) with desired length,
wherein said first sliding member (52) receives said second sliding member (54) such that one of the opening (56) on said second sliding member (54) receives said engaging member to engage said first sliding member (52) with said second sliding member (54) forming desired length of at least one of said wheel engaging member (20), said first member (30) and said second member (40).
2. The wheel chock (10) as claimed in claim 1, wherein said wheel engaging member (20) includes said adjustable mechanism (50) to vary length of said wheel engaging member (20).

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3. The wheel chock (10) as claimed in claim 1, wherein said wheel engaging member (20), said first member (30) and said second member (40) include said adjustable mechanism (50) to vary length of said wheel engaging member (20), said first member (30) and said second member (40).

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4. The wheel chock (10) as claimed in claim 1, wherein the first end of the first member (30) is movably connected with one end of said wheel engaging member (20) by a hinge joint (60) to form a foldable connection.

5. The wheel chock (10) as claimed in claim 1, wherein the first end of the second member (40) is movably connected with said first member (30) by a hinge joint (60) to form a foldable connection.

6. The wheel chock (10) as claimed in claim 1, wherein the second end of the second member (40) is movably connected with the wheel engaging member (20) by a hinge joint (60) to form a foldable connection.

7. The wheel chock (10) as claimed in claim 1, wherein said second member (40) includes a hinge joint (60) to enable folding of said second member (40).

8. The wheel chock (10) as claimed in claim 1, wherein said first member (30) includes a hinge joint (60) forming a movable contact of said first member (30) with a first locking plate (70).

9. The wheel chock (10) as claimed in claim 8, wherein said second member (40) includes a first stopper (80) to lock said first locking plate for supporting said second member (40).

10. The wheel chock (10) as claimed in claim 9, wherein said first locking plate includes said adjustable mechanism (50) to vary length of said first locking plate (70).

11. The wheel chock (10) as claimed in claim 1, wherein said wheel engaging member (20) includes a hinge joint (60) forming a movable contact of said wheel engaging member (20) with a second locking plate (90).

12. The wheel chock (10) as claimed in claim 11, wherein said first member (30) includes a plurality of second stopper (92) to support said wheel engaging member (20) against said wheel by locking said second locking plate (90) on said first member (30).