Spring devices – Fluid – Expansible-contractible chamber device
Patent
1986-08-26
1988-05-10
Kashnikow, Andres
Spring devices
Fluid
Expansible-contractible chamber device
137536, 137538, 137540, 267 6428, 267130, F16F 902, F16F 700, F16K 1500
Patent
active
047429976
ABSTRACT:
For use in a system comprising a source of pressurized fluid and a plurality of lines extending to a plurality of gas springs, a gas spring comprising a cylindrical body with a bore, a piston rod positioned in the body and having an end projecting beyond one end of the body, a base closing the other end of the body, the cylindrical body and piston rod interengaging one another to limit relative outward movement of the piston rod with respect to the body. The gas spring includes a radial inlet through the wall of the cylindrical body into the base. A one-way valve is positioned in the base within the inlet and an axial inlet pressure passage extends from the outlet end of the valve to the interior of the cylinder. A radial bore is provided in the base and communicates at one end through an axial pressure relief passage to the interior of the cylinder. A pressure relief shuttle piston is positioned in the radial bore and a radial passage extends from the end of the shuttle piston remote from the axial pressure relief passage to the radial inlet of the cylindrical body. A spring yieldingly urges the pressure relief piston toward the axial pressure relief passage.
REFERENCES:
patent: 3250526 (1966-05-01), Kress
patent: 4056965 (1977-11-01), Heiser
patent: 4550899 (1985-11-01), Holley
patent: 4662616 (1987-05-01), Hennells
patent: 4664362 (1987-05-01), Hennells
Kashnikow Andres
Oberleitner Robert J.
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