Time delay device for a gas spring

Details Time delay device for a gas spring Time delay device for a gas spring

1990-05-01

1991-12-31

Oberleitner, Robert J.

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

267 6412, 267114, 267130, F16F 500

Patent

active

050764047

ABSTRACT:
The present invention relates to an arrangement for a gas spring (1). This comprises a cylinder (2) with a piston (3) capable of being displaced axially therein, which marks the boundary of an inner space (4) of the cylinder (2) filled with a compressible gas-oil mixture. The space (4) varies in volume in accordance with a force (F) acting upon a piston rod connected to the piston. The invention is characterized in that the inner space is so arranged as to communicate via an openable and closable valve (13) with a closed space (10). The arrangement includes a control device (12) for actuating the valve (13), which control device is so arranged as to close the valve (13) once the piston (3) has moved past a predetermined axial position in the cylinder (2), and as to open it at a predetermined time after the moment of closing.

REFERENCES:
patent: 4061295 (1979-07-01), Somm
patent: 4720085 (1988-01-01), Shinbori et al.
patent: 4774865 (1988-10-01), Wallis

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