Motors: expansible chamber type – Cyclically operable – Working member controlled motive fluid for distributor motor
Patent
1979-08-03
1981-01-13
Bleutge, Robert L.
Motors: expansible chamber type
Cyclically operable
Working member controlled motive fluid for distributor motor
91318, 91319, 91321, F01L 2506, F01B 718
Patent
active
042442745
ABSTRACT:
A cylinder control device of a hydraulic cylinder apparatus including a main directional control valve having a pilot chamber for controlling the reciprocatory movement of the piston, and a first valve including a plurality valve members for selectively communicating the pilot chamber, via an auxiliary directional control valve, to the fluid discharging tank side of the working fluid circuit when the piston reaches a predetermined position in its rearward stroke. The pilot chamber is brought into communication, via a passage, to the pump side of the working fluid circuit by a second valve when the piston reaches the end of its forward stroke. A control valve using the pump side pressure as a pilot pressure is mounted in the passage connecting the second valve to the pilot chamber or in the passage connecting the pilot chamber to the auxiliary directional control valve.
REFERENCES:
patent: 3540348 (1970-11-01), Pennther
patent: 3916765 (1975-11-01), Hilton
patent: 4062639 (1977-12-01), Conlee
Bleutge Robert L.
Kawasaki Jukogyo Kabushiki Kaisha
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