FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION A Mechanism To Discharge Static Electricity In 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
Sanjib Roy, Alankrita Medha, Amrendra Kumar
All 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.

FIELD OF INVENTION
This invention relates to a mechanism for discharging static electricity in vehicles.
BACKGROUND OF INVENTION
Static electricity refers to the buildup of electric charge on the surface of objects. The static charges remain on an object until they either bleed off to ground or are quickly neutralized by a discharge. The spark associated with static electricity is caused by electrostatic discharge, or simply static discharge, as excess charge is neutralized by a flow of charges from or to the surroundings. Discharge of static electricity can create severe hazards in automobiles as they are dealing with flammable substances, where a small electrical spark may ignite explosive mixtures. Electrostatic discharge while fueling with gasoline is a present danger at gas stations.
It is beneficial to have a discharge mechanism to get rid of the accumulated static electricity on the vehicle.
The current practice aims at solving this problem by providing electrical link between the vehicle body and the ground. This is generally achieved by hanging a metallic chain or strap provided with a pointed metallic triangular end to an electrically conducting part of the vehicle. These straps and chains provide a discharge path for the accumulated static electricity from the vehicle to ground.
However, straps and chains are quickly worn out or damaged by constant contact with the ground as the vehicle travels at high speed over a range of terrains, which requires the straps or chains to be regularly maintained. The straps and chains are also liable to cause loose materials on the road to be ejected in a predominantly rearwards direction, thus potentially causing damage to trailing vehicles. It has been observed that the vehicle owners sometimes tie this chain with the vehicle

instead of dragging it all along in order to reduce the wear and tear of the pointed metallic element. Thus the dangers of static electricity discharge remains intact.
OBJECTS OF INVENTION
The primary object of the present invention is to provide a mechanism to discharge the static electricity in the vehicles.
Yet another object of the present invention is to reduce the wear and tear of the metallic end provided in the discharge mechanism and to ensure the regular discharge of static electricity.
SUMMARY OF INVENTION
The embodiments herein relate to provide a mechanism to discharge static electricity in vehicles. The mechanism comprises a pneumatic cylinder mounted on vehicle body by mounting bracket. A pair of holding brackets is provided for holding said pneumatic cylinder on said mounting bracket. A drying and distribution unit (DDU) is connected between a brake pedal and one end of a release valve, other end of said release valve is connected to said pneumatic cylinder by pneumatic pipeline. A metallic chain with its one end is fastened to the piston of said pneumatic cylinder and other end with pointed triangular tip is suspended freely to discharge static electricity when said brake pedal is pressed by driver.
The pneumatic cylinder with a metallic chain attached to its piston is mounted on the vehicle body. A connection from the vehicle braking systems DDU (Drying and Distribution Unit) unit is provided to this cylinder. Thus whenever the driver presses the brake due to the pneumatic power supply from the DDU unit the piston of the cylinder goes down, the chain hanging from it comes in contact with the ground; an electrical discharge path is provided and the accumulated static electricity is thus discharged. As soon as the brake pedal is released the relief valve

in the pneumatic supply line relieves the pneumatic pressure and the piston retracts to its original position. By this mechanism we reduce the wear and tear of the metallic conical end and ensure regular discharge of static electricity.
BRIEF DESCRIPTION OF THE DRAWINGS
For a more complete understanding, reference is now made to the following description taken in conjunction with the accompanying drawings in which: Fig. 1 illustrates the mechanism used in vehicles for Static Electricity Discharge
according to PRIOR ART; Fig.2a - 2e illustrates a vehicle equipped with a static discharge mechanism, in
accordance with the disclosure. Fig.2a shows the Front view of the vehicle Assembly. Fig.2b is the Right side view of the vehicle Assembly. Fig.2c shows the Left side view of the vehicle Assembly. Fig.2d illustrates the Isometric view of the vehicle Assembly (With Frame). Fig.2e shows the Top view of the vehicle Assembly Figs. 3a - 3e illustrate the invention assembly and aggregates comprising the DDU
connected to a pneumatic cylinder; with a metallic chain attached to its
piston , as described in the disclosure. Fig. 3a shows the front view of the vehicle assembly. Fig. 3b shows the top perspective view of the invention Assembly. Fig. 3c shows the Left side view of the invention Assembly Fig 3d shows the Right side view of the invention Assembly Fig 3e shows the Isometric view of the invention Assembly.
DETAILED DESCRIPTION
Referring now to the drawings, wherein like reference numbers used herein to designate like elements throughout, the various views and embodiments of a STATIC ELECTRICITY DISCHARGE SYSTEM. The figures are not necessarily drawn to scale, and in some instances the drawings have been exaggerated and/or

simplified in places for illustrative purposes only. One of ordinary skill in the art will appreciate the many possible applications and variations based on the following examples of possible embodiments.
Fig 1 depicts the most common method of Static Electricity Discharge, i.e. hanging a metallic chain 6P with a triangular end 8P on the vehicle 7. This method provides a constant discharge path for the Static electricity. It will be appreciated that the metallic chain 6P gets dragged along all through the journey and its metallic triangular end 8P gets worn out quickly overtime. Also the entire assembly of Fig 1 may not be aesthetically appealing.
Referring now to Fig 2a - 2e which shows the vehicle Assembly in accordance with the disclosure. The vehicle assembly includes a brake pedal 10, a pneumatic pipe line 2, a drying and distribution unit (DDU) 1, pneumatic cylinder 5 and vehicle body 7. The pneumatic cylinder 5 includes a metallic chain 6 with a conical metallic end 8. The metallic chain 6 is mounted on the pneumatic cylinder 5 by a threaded stud 14. A C-bracket 3 is mounted on the vehicle body 7 by hex nuts and bolts 12 which further attaches to the pneumatic cylinder 5. The pair of brackets 4 attaches the pneumatic cylinder 5 with the C-bracket 3. According to present invention the pneumatic cylinder is mounted on the rear cross member of the vehicle. The proper length of pneumatic pipeline is selected with a bore diameter of approximately 10mm to be used for the connection of the Pneumatic Cylinder with the DDU.
The pneumatic cylinder 5 is connected to the DDU unit 1 by pneumatic pipeline 2. The pneumatic pipeline 2 is such that when the Brake Pedal 10 is pressed, the pneumatic air pressure from the DDU 1 actuates the pneumatic cylinder 5 such that there is ground (G) contact of the conical metallic end 8. This provides a discharge path for the static electricity accumulated on the vehicle body 7

When the Brake Pedal 10 is released the quick release valve 9 relives the pneumatic pressure in the pneumatic pipeline 2. This ensures the metallic end 8 to retract to its original position immediately.
Referring now to Fig 3a - 3e which shows the invention Assembly in accordance with the disclosure. The invention assembly includes a brake pedal 10, pneumatic pipe line 2, DDU unit 1 and pneumatic cylinder 5. The pneumatic cylinder 5 includes a metallic chain 6 with a conical metallic end 8. The metallic chain 6 is mounted on the pneumatic cylinder 5 by a threaded stud 14. A C-bracket 3 is mounted on the vehicle body 7 by hex nuts and bolts 12 which further attaches to the pneumatic cylinder 5. The pair of brackets 4 attaches the pneumatic cylinder 5 with the C-bracket 3 with hex nut and bolt 11.
Fig 3 a depicts the two extreme positions of the brake pedal 10 along with the metallic chain 6 with the pointed conical metallic end 8. The actuation position is showed in dotted lines. The normal position is shown in bold lines.
ADVANTAGES
• The mechanism according to present invention is provided to discharge the accumulated static electricity on the vehicle.
• It reduces the wear and tear of the metallic end provided in the discharge mechanism and ensures the regular discharge of static electricity.
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 mechanism to discharge static electricity in vehicles, comprising:
a pneumatic cylinder mounted on vehicle by mounting bracket;
a pair of holding brackets provided for holding said pneumatic cylinder on said mounting bracket;
a drying and distribution unit (DDU) connected between a brake pedal and one end of a release valve, other end of said release valve is connected to said pneumatic cylinder by pneumatic pipeline;
a metallic chain with its one end is fastened to the piston of the said pneumatic cylinder and other end with pointed triangular tip is suspended freely to discharge static electricity when said brake pedal is pressed.
2. The mechanism according to claim 1, wherein when said brake pedal is pressed by driver due to the pneumatic air pressure from said DDU unit actuates piston is said pneumatic cylinder which simultaneously moves the metallic chain with triangular tip hanging from it to come in contact with the ground to discharge the accumulated static electricity on the vehicle.
3. The mechanism according to claim 1, wherein when said brake pedal is released the release valve in said pneumatic supply line relieves the pneumatic pressure to retract said piston to its original position.
4. The mechanism according to claim 1, wherein said metallic chain is mounted on the pneumatic cylinder by a threaded stud.
5. The mechanism according to claim 1, wherein said mounting bracket provided for mounting said pneumatic cylinder on vehicle body is a C-bracket.

6. The mechanism to discharge static electricity as herein described with reference to accompanying drawings.