Gas spring actuator

Details Gas spring actuator Gas spring actuator

1991-01-16

1992-08-25

Look, Edward K.

Motors: expansible chamber type

Hydro-pneumatic

91417R, 92134, F15B 2104, F01B 3100

Patent

active

051408945

ABSTRACT:
A gas spring actuator which, when attached to a valve, will return the valve to its initial position after the valve has been moved to a second position by application of a pressurized fluid that opposes the gas spring. The gas spring is charged to a predetermined gas pressure. A hydraulic fluid is applied in an opposing manner to drive the piston in one direction to operate the valve and simultaneously pressurize the gas in the gas spring. Upon removal of the hydraulic pressure, the pressurized gas returns the piston, and the valve, to its initial position.

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patent: 4777800 (1988-10-01), Hay, II
patent: 4961316 (1990-10-01), Corke et al.

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