Gas spring including hydraulic locking means

Details Gas spring including hydraulic locking means Gas spring including hydraulic locking means

1981-10-14

1984-05-01

Butler, Douglas C.

Spring devices

Vehicle

Comprising compressible fluid

267 6415, 267114, 248404, 248550, 248566, 188283, 188300, 108144, F16F 906, A47B 910

Patent

active

044456719

ABSTRACT:
A gas spring for height adjustment of drawing-tables or the like includes an arrangement for hydraulically locking the gas spring against sudden collapse due to overloading or loss of internal gas pressure. The hydraulic locking mechanism includes a pressure responsive valve which operates, in response to an excess pressure differential between the gas spring cavity and the pressurized gas chamber, either to prevent flow of the hydraulic locking medium out of the cylinder cavity or to restrict such flow to a slow, safe rate.

REFERENCES:
patent: 2239112 (1941-04-01), Nickelson
patent: 2691503 (1954-10-01), Bigelow
patent: 2853159 (1958-09-01), Kuhn, Jr.
patent: 2953122 (1960-09-01), Zagar
patent: 3711054 (1973-01-01), Bauer
patent: 3880465 (1975-04-01), Scheben
patent: 3991863 (1976-11-01), Lee
patent: 4074887 (1978-02-01), Hale
patent: 4153237 (1979-05-01), Supalla

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