FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION Engine Roll Restrictor device for a vehicle & method of testing thereof


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
Piyush Kende, Deelip Wagh, Sonchal Chirag
and Amit Jain all Indian national 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


FIELD OF INVENTION
The present invention is related to Engine Rolling of a vehicle and more particularly it relates to Engine roll restrictor device for a vehicle.
BACKGROUND OF INVENTION
Generally during the engine start up and switch off, there is a tendency of the engine
to roll.
In a normal running of the vehicle, customer sometimes does the abusive start of the
vehicle, but not purposely. One of the abuse operations is while taking the vehicle in
reverse direction, if clutch is fully pressed and released suddenly; there is a tendency
to create a sudden jerk on the vehicle by the Engine.
During abusive operation of the vehicle i.e. during reversing the vehicle if the
customer released the clutch suddenly it creates a jerk, which causes the engine to roll
heavily in clockwise direction. Due to said engine rolling and packaging configuration
between said engine and C-mount which is fitted between engine and sub-frame , said
C- mount tends to rotates in anticlockwise direction and fouls with the sub-frame, if
the impact is more C-mount gets damaged.
During C-mount rolling, the distance of c-mount rolls is more than the predetermined
gap- kept between C-mount bracket and sub frame. As the C-mount travels more
angular distance than the predetermined distance, it impacts on the sub-frame and the
said sub frame is damaged or brakes down.
In order to address the above said disadvantage, engine roll restrictor device is
developed which prevents the C-mount bracket fouling with the sub frame.
OBJECTS OF INVENTION
The main object of the present invention is to provide an engine roll restrictor device for a vehicle.

Another object of the present invention is to provide an engine roll restrictor device for a vehicle which prevents the C-mount bracket fouling with the sub-frame. Yet another object of the present invention is to provide an engine roll restrictor device for a vehicle which is simple in construction and cost effective.
STATEMENT OF INVENTION
Accordingly the present invention discloses an engine roll restrictor assembly device
for a vehicle comprising;
a bracket facilitated with integrated flange member configured for mounting on gear
box casing with mounting means;
said bracket is fitted between said engine and sub-frarne to maintain a predetermined
distance between the sub-frame and C-mount;
a nut and a bolt with an integral resilient member provided on bolt head configured to
absorb impact and shock on said C mount to prevent fouling of said C mount with sub
frame;
a locking nut for providing below said nut to prevent said bolt from loosening during
impact;
wherein said integrated flange member comprising
hole provided therein for disposing said bolt;
a nut concentrically welded on bottom of said hole facilitated for mounting of said
bolt.
BRIEF DESCRIPTION OF INVENTION
In accordance with present invention, engine roll restrictor assembly device for a vehicle comprises; a bracket mounted on gear box casing, said bracket having integrated flange member , mounting means for mounting said bracket on said gear box casing, nut and bolt with integral round shaped resilient head provided on top,

said integrated flange member having hole provided therein for disposing said bolt, wherein said bracket is fitted between said engine and sub-frame in such a way that it maintains a predetermined distance between said C-mount and sub-frame so that impact and shock on the said sub frame during jerk is absorbed by said resilient head to prevent fouling of said C-mount with sub frame.
BRIEF DESCRIPTION OF DRAWINGS
In accordance to the present invention, Figure-01 is the side view of the roll restrictor device. Figure-02 is sectional view at X-X of roll restrictor device. Figure-03 is assembly of roll restrictor device in vehicle.
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, engine roll restrictor assembly device for a vehicle comprises; a bracket (1) mounted on gear box casing, said bracket having integrated flange member (2), mounting means(2') for mounting said bracket (1) on said gear box casing, nut and bolt (4) with integral round shaped resilient head (3) provided on top, said integrated flange member (2) having hole(5) provided therein for disposing said bolt (4), wherein said bracket (1) is fitted between said engine and sub-frame in such a way that it maintains a predetermined distance between said C-mount and sub-frame so that impact and shock on the said sub frame during jerk is absorbed by said resilient head to prevent fouling of said C-mount with sub frame.

Said C-mount is connected to said sub-frame and gear box casing. Said C-mount
absorbs the jerk Produced during the engine ON and off condition. Said C- mount is
provided to absorb the vibrations of the engine.
One end of the said bracket (1) is having two pierced hole (2') for mounting said
bracket on the gear box casing. One end of said bracket is fitted to the said gear box
casing with the help of tightening of the fastener means like bolts. Other end of the
said bracket is free and having a pierced hole (5) on the said flange (2).
Said bracket (1) is made by pressing operation i e the bracket is pressed part. A Nut
(6) is welded at the bottom of the hole (5).
A resilient member (3) is a rubber button which is molded and fitted on the top of the
said nut of bolt (4).
The said bolt (4) with rubber button (3) can be fastened to said welded nut (6)
provided on bottom of the said flange member (2).
The locking nut (6') is provided below the welded nut (6) for preventing the said bolt
(4) with rubber button (3) from loosening during impact loading on the said bolt (4).
Said Rubber button (3) is molded on the threaded bolt (4) which gets tighten through
the threaded hole (5). Nut (6) is welded at bottom of said flange member (2) of said
bracket (1).
Required height of the said rubber button is adjusted by adjusting the said bolt (4).
The said locking nut (6') provided for tightening the rubber button (3) and avoiding
the loosening of rubber button assembly.
The said bracket is fitted on the said gear box casing by fastening means like bolts .
The said bracket (1) is fitted parallel to C-mount (7). During reversing the vehicle
and sudden release of the clutch, heavy jerk will cause the "Engine roll restrictor"
bracket rubber to impact with the Sub-frame(8); this will absorbed the impact due to
rolling of engine (9).

Method for testing vehicle with the roll resistor device:
Providing said roll resistor device on vehicle,
Taking the vehicle on a predetermined road,
Keeping the vehicle at Neutral gear condition,
Starting the Engine of vehicle.
Pressing the clutch completely of the vehicle
Engaging the gear into Reverse condition,
Accelerating the vehicle at an engine rpm to 1800.
Releasing the clutch suddenly and immediately pressing the clutch so that vehicle
will not stop.
Checking the C- mount fouling or damage after every 10 cycle,
Repeating the trials till 120 Cycles.
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. An engine roll restrictor assembly device for a vehicle comprising;
a bracket facilitated with integrated flange member configured for mounting on gear box casing with mounting means;
said bracket is fitted between said engine and sub-frame to maintain a predetermined distance between the sub-frame and C-mount;
a nut and a bolt with an integral resilient member provided on bolt head configured to absorb impact and shock on said C mount to prevent fouling of said C mount with sub frame;
a locking nut for providing below said nut to prevent said bolt from loosening during impact;
wherein said integrated flange member comprising hole provided therein for disposing said bolt;
a nut concentrically welded on bottom of said hole facilitated for mounting of said bolt.
2. The device as claimed in claim 1, wherein said resilient member is a round shaped rubber button molded and fitted on the top of said head of the bolt.
3. The device as claimed in claim 1, wherein said bolt is configured to fasten to said welded nut provided on bottom of said flange member.
4. The device as claimed in claim 1, wherein required height of said rubber button can be adjusted by adjusting said bolt.

5. The device as claimed in claim 1, wherein said bracket is fitted parallel to the C mount of said vehicle.
6. The device as claimed in claim 1, wherein said C mount is provided to absorb engine vibration.
7. The device as claimed in claim 1, wherein at least two holes provided at the end of the bracket facilitated for mounting said bracket on said gear box casing by fastening means.
8. The method of testing engine roll restrictor assembly device comprising the steps of;
providing said roll resistor device on vehicle,
taking the vehicle on a predetermined road;
keeping the vehicle at neutral gear condition;
starting the engine of vehicle;
pressing the clutch of the vehicle completely;
engaging the gear into reverse condition;
accelerating the vehicle at an engine rpm to 1800;
releasing the clutch suddenly and immediately pressing the clutch so that
vehicle will not stop;
checking the C- mount fouling or damage after every 10 cycle;
repeating the trials till 120 cycles .
9. An engine roll restrictor assembly device for a vehicle substantially as herein
above described and as illustrated in accompanying drawings.

10. A method of testing engine roll restrictor assembly device substantially as herein described.
Dated this 25th day of March 2009
TATA MOTORS LIMITED By their Agent & Attorney

Karuna Goleria of DePENNING & DePENNING