Apparatus for driving piston by fluid pressure

Details Apparatus for driving piston by fluid pressure Apparatus for driving piston by fluid pressure

1991-01-29

1991-09-24

Look, Edward K.

Motors: expansible chamber type

Cyclically operable

Working member controlled motive fluid for distributor motor

91313, 91307, 417392, 417398, 417401, 417402, F01L 2502

Patent

active

050504827

ABSTRACT:
An apparatus for driving a piston by fluid pressure in which a piston (8) is reciprocated upward and downward by supplying and discharging pressure fluid to and from an actuation chamber (9) disposed in a cylinder (7) through a pilot valve (18) and a fluid pressure supply-discharge valve (13). Above a supply-discharge valve member (30) of the supply-discharge valve (13) there is provided a cylinder chamber (70a), into which a pilot valve casing (71) is inserted so as to hermetically slide up and down. The fluid pressure in the discharge actuation chamber (35) disposed above the supply-discharge valve member (30) allows the pilot valve casing (71) to ascend against a return spring (73).

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