Vehicle fenders – With car control – Fluid brake
Patent
1988-12-29
1990-06-12
Cherry, Johnny D.
Vehicle fenders
With car control
Fluid brake
293 30, 293134, B60R 1902
Patent
active
049326970
ABSTRACT:
A shock absorbing system for an automotive vehicle having a chassis and front and rear bumpers which are movable relative to the chassis is provided. The system comprises an hydraulic oil circuit which includes a storage tank for storing hydraulic oil, a pump for pumping hydraulic oil from the tank into the circuit and an electric motor for driving the pump. An actuator for extending or retracting the front and rear bumpers away or toward the chassis is provided downstream of the pump and comprises an upper oil chamber and a lower oil chamber, the arrangement being such that when a predetermined oil pressure is maintained in the upper chamber, the bumpers are maintained in a retracted position relative to the chassis and when the pressure is switched to the lower oil chamber, the bumpers are moved to positions in which they are extended from the chassis. A solenoid valve is provided for alternately connecting either the upper oil chamber or the lower oil chamber of the actuator to the hydraulic oil flow downstream of the pump. Switching means is provided for activating the solenoid valve. An accumulator for absorbing the pressure shock imported to the front or rear bumper due to a collision of the vehicle with another vehicle or object is included in the system. The accumulator comprises a cylinder and a piston in the cylinder dividing the cylinder into an oil chamber, which is connected to the hydraulic return line, and a gas chamber which is connected to a source of pressurized gas for cushioning the shock of a collision.
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Cherry Johnny D.
Hoge Gary C.
LandOfFree
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