FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003


COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION REAR UNDER PROTECTION DEVICE FOR VEHICLES
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. Vivek Dwivedi and Mr. Brijesh Gupta
Both are 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 particularly describes the invention and the manner
in which it is to be performed.

25 NOV 2008

FIELD OF INVENTION
The present invention relates to a Rear under protection device for vehicles.
BACKGROUND OF INVENTION
Heavy commercial vehicles usually have a high ground clearance, which poses a serious risk to smaller vehicles like cars, three wheelers. In the event of a collision with the rear end of a heavy truck the front portion of smaller vehicles penetrates inside the rear of the heavy vehicle and may get wedged between the road and underside of the heavy vehicle, causing serious injury to the occupants of the smaller vehicle. As a solution to the above problem it has been proposed to have a load-bearing member at a relevant height, which will prevent smaller vehicles from under-riding, the rear end of larger vehicles. Generally Rear under protection device (RUPD) is provided at the rear end of the commercial vehicle for preventing under running of smaller vehicle. Typical RUPD for commercial vehicles comprises of a load bearing cross member fixed to frame by intermediate mountings brackets. Some arrangements have a foldable RUPD arrangement. However most of the RUPD arrangements cannot be commonised to a wide variety of vehicle models because of different height of frames due to suspension or tyres options .A simplified RUPD arrangement with a vertical height adjustment of RUPD using the same components to cater to the different tyre and suspension options is required.
OBJECT OF INVENTION
Main object of the present invention is provide rear under protection device for vehicles.
2

Another object of the present invention is to provide rear under protection device for vehicles which provides an improved simplified under -run protection arrangement with a vertical height adjustment provision
Another object of the present invention is to provide rear under protection device for vehicles which facilitates commonisation of cross member assembly for different vehicle models with different support brackets .
BRIEF DESCRIPTION OF INVENTION
In accordance with present Invention, rear under protection device comprises; frame long member, at least two mounting bracket member with rows of mounting holes at both side which is connected to the rear end of said long member frame, at least two support bracket member at both side for connecting to the said mounting bracket member, cross member, at least two reinforcement plates welded to cross member & support bracket member , at least two end cap at both sides of said cross member for closing the end portion Further the mounting bracket are used for different vehicle categories with other components being common.
BRIEF DESCRIPTION OF DRAWINGS
Figure-01 shows the isometric view of rear under protection device, with smaller
bracket (2A).
Figure-02 shows the isometric view of rear under protection device, with bigger
bracket (2) with position-1 & position-2.
Figure 03 shows the side view of rear under protection device, with bigger
bracket of position-1 & position-2.
3

Figure-04 shows the rear view of rear under protection device, with bigger
bracket (2).
Figure-05 shows the side view of RUPD with adjustable holes on the long
member frame.
Figure-06 shows the rear view of the rear under protection device, with smaller
bracket (2A).
DETAILED DESCRIPTION OF INVENTION
Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same,
In accordance with present Invention, rear under protection device comprises; frame long member (1), at least two mounting bracket member (2) or (2A) at both side which is connected to the rear end of said long member frame (1) , at least two support bracket member(3) at both side for connecting the said mounting bracket member (2) or (2A) , cross member (4) , at least two reinforcement plates (5) for holding said cross member (4) to support bracket member (3) , at least two end cap (6)at both of said cross member (4) for closing the end portion of the cross member.
Said Mounting bracket members (2) or (2A) are formed from sheet of E34 grade steel having thickness of about 6mm thickness. Brackets are mirror image of one another.
Said Support bracket members (3) are formed from sheet of E34 grade steel having thickness of about 5mm thickness. Brackets are mirror image of one another
4

Said Cross member(4) consists of reinforcement plate(5) which is welded to the said support bracket members (3) having a length greater than the said support bracket members, which extends to the extreme end to the wheel tires to the both end.
Plurality of Bolts (7) is provided for mounting the said Mounting bracket members (2) or (2A) to the said long member frame (1). For RUPD cross member height adjustment mounting holes (8) are provided at the lower end of the said mounting bracket members (2) for adjusting the height between road surface and the said cross member (4) by suitably using the mounting holes arrangement.
Bolted connections (9) are provided for joining Said Support bracket members (3) and said Mounting bracket members (2) or (2A).
The rear end of the said long member frame (1) comprises Adjustable hole (10) for mounting said mounting bracket members (2)or (2A) at suitable positions to the said long member frame (1).
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

WE CLAIM
1) A rear under protection device for heavy vehicles comprising:
at least two mounting bracket members connected to both sides of the rear end of long member frames of said vehicle;
at least two support bracket members for connecting the said mounting bracket members to a cross member;
at least two reinforcement plates for holding said cross member to support bracket members;
wherein said long members, mounting bracket members and support bracket members are provided with plurality of holes at predetermined locations to enable fitment of said cross member at required height from the ground by means of fixedly joining at appropriate locations of said holes.
2) The device as claimed in claim 1, wherein at least two end caps are provided at both ends of said cross member for closing the end portions of said cross member
3) The device as claimed in claim 1 wherein said mounting bracket members are formed from sheet of steel of appropriate grades such as E 34 grade having thickness of about 6mm thickness.
4) The device as claimed in claim 1 wherein said support bracket members are formed from sheet of steel of appropriate grade such as E34 grade having thickness of about 5mm thickness.
5) The device as claimed in claim 1 wherein said reinforcement plates are welded to said support bracket members and have a length greater than said support bracket members.
6

6) The device as claimed in claim 1 wherein plurality of fasteners are provided for mounting said mounting bracket members to the said long member frame.
7) The device as claimed in claim 1 wherein mounting holes are provided at the lower end of the said mounting bracket members to enable adjusting the height between road surface and the said cross member by suitably adapting the mounting holes arrangement.
8) The device as claimed in claim 1 wherein bolted connections are provided for joining said support bracket members and said mounting bracket members.
9) The device as claimed in claim 1 wherein said reinforcement plates are welded to said cross member and said support bracket members are welded to the said cross member at the location of the said reinforcement plates.
10) A Rear under protection device for heavy vehicle as claimed in above claims and as described in the specifications and as illustrated in accompanying drawings.
11) A vehicle fitted with Rear under protection device as claimed in any one of the preceding claims.
Dated this 25th day of November 2008