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Common Accelerator-Brake Pedal

Use Same pedal as brake and Accelerator
Patent application no. -  225/BOM/98
The common accelerator brake Pedal for automatic transmission vehicles since these types of vehicles are controlled using two Pedals i.e. Accelerator pedal and brake pedal. In integrated Pedal system only one Pedal perform two functions of accelerator and brake.
Invention (What is New)
The pedal is built so that an un-pressed Pedal (released fully) apply full brakes of the vehicle remain. A half pressed pedal releases the brakes completely. The pedal starts working as accelerator when pressed past half position. The pedal would be more suitable for vehicle that has no clutch pedal.(Automatic Transmission or Auto Gearshift vehicles).
Accelerator Pedal
Diagram 1In diagram I '1' is a master cylinder of the brakes system. '2' is a piston operating inside the cylinder, '3' is a connecting rod that connect brake with the pedal. A spring '4' fitted on the body of vehicle.

Shaft '3' move freely through the hole guide '5'. The spring '4' has enough tension to fully apply the brakes in pushed condition. .

The pedal '9' (not shown complete in the diagram) moves around axis shown as '14'. The Pedal '9' is fitted with a cam at it's axis as shown in the diagram. The cam moves with the Pedal '9' around axis 14'. Cam is shown as '8'.

The cam '8' has a groove '7' on it's periphery. '6' is a follower, that moves along groove '7' following the movements of cam ‘8’. Follower '6' is attached to shaft '3' as shown in the diagram I.
The shape of cam '8' is as shown in the diagrams II, III, and IV on the drawing page II. When Pedal is un-pressed and the applied completely (position A).
As the Pedal is pressed, cam '8' moves around axis '14'. Due to the shape of the cam, the follower '6' climbs up and the brakes are gradually released as the piston in the master cylinder is pulled out.

When Pedal is half pressed, the follower climbs the distance equal to the radius of the cam '8' and brakes are released fully. Thus till half pressed position, Pedal is used as a brake Pedal.
As the Pedal is pressed further, brakes remain released due to semicircular shape of cam ‘8’ and follower remains steady.

The movement of Pedal moves limb '15' around axis '14'. When Pedal is pressed more than half pressed position the limb '15' is connected with the accelerator '11' and accelerator is pulled with the movement of the Pedal. Thus the Pedal works as accelerator when pressed past half position.

When Pedal is released it moves toward its normal from position the accelerator is brought to idle position.

When Pedal is released further, the accelerator '11' is disconnected from limb '15' and follower '6' climbs down and starts applying brakes.
Pedal 2
Diagram II, III & IV
Thus one Pedal is used for two functions of accelerator and brake (automatic transmission vehicle). The Pedal operates with both the functions in mutually exclusive way