Three position fluid-controlled actuator

Details Three position fluid-controlled actuator Three position fluid-controlled actuator

1989-05-31

1991-06-04

Kwon, John T.

Expansible chamber devices

Mutually relatively movable cylinder or sleeve, member...

Cylinder or sleeve forms working member

92117A, 192 85C, 192 86, F01B 720

Patent

active

050204190

ABSTRACT:
A three-position hydraulic actuator comprising an outer body defining a cylindrical inner cavity; a dual-rod piston sliding inside the cavity; a pair of stop rings mounted in respective central annular seats in the lateral wall of the cavity and on the piston; and a pair of bushes sliding in sealed manner between the piston and the lateral wall of the cavity and located on axially opposite sides in relation to the stop rings.

REFERENCES:
patent: 2806449 (1957-09-01), Simmons
patent: 3875849 (1975-04-01), Patel
patent: 3945265 (1976-03-01), Bell et al.
patent: 4002105 (1977-01-01), Bell et al.
patent: 4593606 (1986-06-01), Klatt et al.
patent: 4716815 (1988-01-01), Stewart
patent: 4773300 (1988-09-01), Klatt et al.

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