Shock absorber with resiliently biased adjustment piston

Details Shock absorber with resiliently biased adjustment piston Shock absorber with resiliently biased adjustment piston

1985-12-03

1988-10-11

Butler, Douglas C.

Brakes

Internal-resistance motion retarder

Position of thrust member relative to chamber

16 66, 92172, 188297, 188301, F16F 948, F16F 902, E05F 300, F16J 100

Patent

active

047764406

ABSTRACT:
A shock absorber comprises a cylinder with a cylindrical bore, an actuator piston with a rod slidably received in the bore, and an adjustment piston slidably received in the bore and resiliently kept in a predetermined position. The adjustment piston cooperates with the actuator piston to define an adjustment chamber therebetween. The adjustment piston is movable in response to pressure developing within the adjustment chamber to vary a rate of air flow between the adjustment chamber and the ambient atmosphere so as to decelerate the actuator piston during its extending movement relative to the cylinder, thus providing a slow and gradual extending movement of the actuator piston.

REFERENCES:
patent: 334105 (1886-01-01), Burch et al.
patent: 1254106 (1918-01-01), Young
patent: 1744514 (1930-01-01), Thompson
patent: 3218849 (1965-11-01), Marvinney et al.
patent: 3307842 (1967-03-01), Ellis, Jr.
patent: 3531065 (1970-09-01), Brown

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