Fluid actuators

Details Fluid actuators Fluid actuators

1994-02-18

1996-06-25

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

F01L 902

Patent

active

055290302

ABSTRACT:
A fluid actuated engine valve assembly comprising a fluid actuator (10) including a chamber (14) in which a piston assembly (17) reciprocates. The piston assembly (17) includes a pair of spaced pistons (18,19) which divide the chamber (12) into three sections (20 21,22) and a passageway (29) which supports a slide valve member (30). Movement of the slide valve member (30) in one direction causes fluid to be directed to the chamber section (20) to cause movement of the piston assembly (14) in one direction. Movement of the valve member (30) in the opposite direction vents the chamber (20) and permits spring (34) and/or spring (42) to move the piston assembly 17 in the opposite direction.

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patent: 5248123 (1993-09-01), Richeson et al.
patent: 5253619 (1993-10-01), Richeson et al.
patent: 5287829 (1994-02-01), Rose

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