Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber
Patent
1975-05-19
1976-06-29
Halvosa, George E. A.
Brakes
Internal-resistance motion retarder
Having a thrust member with a variable volume chamber
188279, 188315, 188322, F16F 919, F16F 934
Patent
active
039660303
ABSTRACT:
A vehicle shock absorber of the hydraulic cylinder and piston type, including a control valve which, during compressive movement, limits pressure of the hydraulic fluid and thereby the damping force of the device in accordance with the rate of compressive movement above a predetermined rate. Operation of the valve may be controlled by pressure generated by obstructing the flow back to the reservoir of fluid displaced by the piston rod entering the cylinder on compressive movement, which pressure will vary in accordance with the rate of compression and consequently the rate of entry of the rod into the cylinder. A pressure control device is provided to limit the damping force during expansion of the shock absorber to thereby permit better road holding ability of the vehicle, with the relative strong damping force at the beginning of the following compressive movement acting to control oscillation of the suspended mass of the vehicle.
REFERENCES:
patent: 2035954 (1936-03-01), Focht
patent: 2320314 (1943-05-01), Trask
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