FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
PROVISIONAL SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION
BOLT ABLE TAILGATE ASSEMBLY FOR A VEHICLE
APPLICANTS
TATA MOTORS LIMITED, an Indian company
having its registered office at Bombay House,
24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
INVENTORS
Mr. Pratul Dixit & Mr. Abhay Dandekar
both Indian Nationals
of 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 describes the invention

Field of invention:
The present invention relates to the tailgates for vehicles and more particularly relates to boltable type tailgate for vehicles.
Background of Invention:
A conventional Tailgate Assembly comprises of Tailgate Inner & Tailgate Outer. This construction also facilitate fitment of Glass. In openable Tailgate, (Hatchback cars) Tailgate is hinged at top or on either side of body which can be opened and closed. It also has a latch at bottom or on either side of Body . In some Old cars Tailgate was a part of Body which was welded. As described the first conventional scheme is too costlier & complex while the other method reduces the accessibility inside the vehicle from the tail end.
Objects of this invention:
The main object of this invention is to provide a Boltable tailgate assembly for a
vehicle.
Yet another object of this invention is to provide a Boltable tailgate assembly for a
vehicle which requires minimum cycle time for assembly on a vehicle.
Yet another object of this invention is to provide a Boltable tailgate assembly for a
vehicle which is simple in construction and cost effective.
Brief description of Invention:
Boltable tailgate assembly for a vehicle in accordance with this invention basically comprises of outer panel, Assembly Tailgate Inner Panel which are assembled together by clinching & welding. Two Reinforcements with Studs are welded at bottom of Assembly Inner Panel while two reinforcements with weld nuts are


welded at top of Assembly Inner Panel. Plurality of slots are provided on vehicle body, two are at bottom side & two on top. Studs are inserted from bottom and bolted from inside by two Wing Nuts while on top Wing bolts are used for Tightening. These Bolts & Nuts are Hand Tightened making Assembly tailgate mounting much simpler on Body than conventional method as no special tools are required for assembling and dismantling.
Detailed description of invention:
Referring now to the images & sectional views showings the areas, only for the
purpose of illustrating the invention, and not for the purpose of Limiting the same.
Fig 1 shows exploded view of tail gate assembly
Fig2 shows exploded view of assembly tail gate inner panel
Fig3 shows sectional view of tail gate assembly mounted on vehicle body from top
side
Fig4 shows sectional view of tail gate assembly mounted on vehicle body from
bottom side
Fig5 shows rear view of vehicle showing the provisions of mounting the tail gate in
accordance with this invention.
Fig6 shows rear view of vehicle with tail gate assembly mounted therein.
Referring figs 1 to 6
Fig. 1 Shows Exploded view of Assembly Tailgate complete. It comprises of Tailgate
Outer Panel (1) and Assembly Tailgated Inner Complete (2). Tailgate outer Panel &
Assembly Inner Panel are clinched & welded together to form Tailgate Assembly
complete.
Fig. 2 Shows Exploded view of Assembly Tailgate Inner Panel completes (2). It
consists of Tailgate Inner Panel (3), Assembly Tailgate mounting reinforcement
Upper LH (4), Assembly Tailgate mounting reinforcement Upper RH (5), Assembly
Tailgate mounting reinforcement Lower LH (6), Assembly Tailgate mounting


reinforcement Lower RH (7). Assembly Tailgate mounting reinforcements at top LH & RH (4) & (5) consists of reinforcement and weld nuts while the Assembly Reinforcements at Bottom LH & RH (6) & (7) consists of Reinforcement and weld studs. All assembly reinforcements (4), (5,) (6) & (7) are spot welded to Tailgate Inner Panel (3).
Fig. 3 shows Sectional view of Tailgate mounting scheme at Top. Assembly Tailgate Complete (1) is bolted with help of Wing Bolt (13) from Inside of the Body at top. Wing Bolt passes through Sleeve (12) which is welded with Body (8) and gets fasten with weld nut of Assembly Tailgate mounting reinforcement Top (4).
Fig. 4 shows Sectional view of Tailgate mounting Scheme at Bottom. Assembly Tailgate Complete (1) is bolted with help of Wing Nut (14) at Bottom. At Bottom the Studs of Assembly Reinforcement Tailgate mounting bottoms passes through body and are fastened with Wing Nut (14) as shown from Inside of the Body.
Figure 5 shows rear view of vehicle. It shows Tailgate mounting points (slots) on body (8), Tail lamp(9), Backlight Glass (10) & Rear Bumper (11), As we can see after BIW Assembly body forms a frame like structure on which 4 mountings (slots) are given which facilitates bolting of Tailgate Assembly on Body.
While fitment of Assembly Tailgate on Vehicle The bottom Studs on Assembly Tailgate Complete (1) are inserted in the slots provided on body (8). These studs also help to confirm proper position of Assembly Tailgate (l)on the Vehicle. Slots are provided on Body (8) for Adjustment of Assembly Tailgate (1). Once The Tailgate is located inside the Body (8) Gap & Flushness with adjacent parts like Tail lamp (9), Rear Bumper (11) & Backlight glass (10) are checked, and then it is tightened on "bottom by Wing Nut (14) & at top Wing studs (13).


These Wing nuts (14) and studs (13) are tightened by hand so no special tools are
required which makes the fitment simpler.
Advantages:
1) Much more cost effective than any other conventional methods
2) Number of Parts required are less compared to conventional vehicles
3) Very Easy to Assemble and dismantle the Tailgate service and customer point of view.
4) Cycle Time required for assembly is less.
The foregoing description is a specific embodiment of the present invention. It should be appreciated that this embodiment is described for purpose of illustration only, and that numerous alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the invention. It is intended that all such modifications and alterations be included insofar as they come within the scope of the invention as claimed or the equivalents thereof.