Delay return gas spring

Details Delay return gas spring Delay return gas spring

1997-06-13

1998-10-20

Young, Lee W.

Spring devices

Vehicle

Comprising compressible fluid

188282, F16F 500

Patent

active

058235132

ABSTRACT:
A gas spring that momentarily dwells in its retracted position after the retraction force is removed. The gas spring has a casing, a first piston received within the casing, a piston rod protruding from the casing and connected to the first piston, and a second piston received within the casing. A compressible gas is received within the casing between the second piston and the other end of the casing. A hydraulic fluid is received within the casing between the first and second pistons and between the first piston and the one end of the casing. A delay valve and a check valve carried by the first piston controllably transfer hydraulic fluid between the two fluid chambers, the delay valve causing the first piston and rod to dwell in the retracted position by delaying the free transfer of fluid between chambers.

REFERENCES:
patent: 2982538 (1961-05-01), Carbon
patent: 3534870 (1970-10-01), Daugherty, Jr.
patent: 4383595 (1983-05-01), Schnitzius
patent: 4503951 (1985-03-01), Imaizumi
patent: 5303804 (1994-04-01), Spiess
patent: 5507475 (1996-04-01), Seel et al.

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