Self contained gas spring

Details Self contained gas spring Self contained gas spring

1991-10-28

1992-12-22

Oberleitner, Robert J.

Spring devices

Fluid

Expansible-contractible chamber device

267 6428, 267130, F16F 500

Patent

active

051728923

ABSTRACT:
A self contained gas spring comprising a housing having a closed end and an open end, and a cylindrical bore. A cylindrical sleeve is inserted into the bore of the housing. The sleeve has at least a portion thereof forming an internal cylindrical surface. A piston rod has a piston within the cylindrical surface. The sleeve defines a space between the sleeve and the bore of the housing. This space communicates with the space of said cylindrical surface at the piston end of the piston rod. A charging valve is provided in the closed end of said housing for charging the space at the piston end of said piston rod and the space between the sleeve and the housing with gas under pressure. Preferably, the die cylinder includes sufficient volumetric space such that the pressures in the self contained gas spring do not increase substantially during the movement of the piston within the cylinder.

REFERENCES:
patent: 3079897 (1963-03-01), Kirsch
patent: 3279781 (1966-10-01), Rumsey
patent: 3281138 (1966-10-01), Oster
patent: 3694111 (1972-09-01), Braun
patent: 4550899 (1985-11-01), Holley
patent: 4664362 (1987-05-01), Hennells
patent: 4742997 (1988-05-01), Wallis
patent: 4815718 (1989-03-01), Kadis

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