Hydraulic actuator

Details Hydraulic actuator Hydraulic actuator

1978-03-27

1979-03-06

Schwadron, Martin P.

Motors: expansible chamber type

Cyclically operable

Pulsator-actuated distributor

91321, 91327, F01L 2502

Patent

active

041424476

ABSTRACT:
A hydraulically operated reciprocating piston and a differential force operated valve are both in continuous fluid contact with a pressurized cushion chamber as well as the piston chamber pressure. The valve position is a function of the cushion chamber pressure. The cushion chamber pressure is a function of the axial position of the piston. The values of these functions are such that the piston is reciprocated when the machine is operated. The valve may, for example, be a sleeve coaxial with the piston or a valve transversely spaced from the piston.

REFERENCES:
patent: 1350342 (1920-08-01), Smith
patent: 2867191 (1959-01-01), Herrmann
patent: 2921559 (1960-01-01), Herrmann
patent: 2932175 (1960-04-01), May
patent: 2937621 (1960-05-01), Herrmann
patent: 3774502 (1973-11-01), Arndt

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