Pneumatic counterbalance stay

Details Pneumatic counterbalance stay Pneumatic counterbalance stay

1992-12-22

1994-02-01

Le, Mark T.

Spring devices

Fluid

Expansible-contractible chamber device

267 6411, 188277, F16F 900

Patent

active

052826090

ABSTRACT:
A partitioning body is fixed to an inner wall of a gas-charged cylinder to separate the cylinder into an actuating chamber and a pressure accumulating chamber, and a thermo-actuator is provided in the partitioning body. A plunger valve device comprising a plunger valve and a valve seat is provided in the partitioning body. A piston rod of a piston is slidably mounted in actuating chamber of the cylinder, an end of the piston rod is projected from the actuating chamber. The plunger valve is arranged to be engaged with the valve seat to close the plunger valve device when projected from the partitioning body by the thermo-actuator, and arranged to be disengaged from the valve seat to open the plunger valve device when retracted by the piston.

REFERENCES:
patent: 2723006 (1955-11-01), Wyeth
patent: 2971212 (1961-02-01), Voster et al.
patent: 4176786 (1979-12-01), Braukmann
patent: 4408751 (1983-10-01), Dodson et al.
patent: 4595046 (1986-06-01), Iino
patent: 5033865 (1991-07-01), Kuze

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