Power plants – Pressure fluid source and motor – Pulsator
Patent
1981-01-23
1984-04-03
Hershkovitz, Abraham
Power plants
Pressure fluid source and motor
Pulsator
60560, 60567, 60591, B60T 1300
Patent
active
044399863
ABSTRACT:
There is disclosed an air operated demand only hydraulic power unit for supplying hydraulic fluid under presure to one or more hydraulic working motors, comprising an extensible pneumatic power motor including an extensible power transmitting member, an extensible hydraulic slave motor including an extensible slave member powered by said power transmitting member, said slave motor being connected to each said hydraulic working motor to power same, valving for controlling the supply of air and oil to said power and slave motors, and a reset valve for insuring full volume cycling of said slave member in said slave motor. In one embodiment the reset is indicated by sensing the various pressure changes after all working motors are extended and then valving leftover oil to a reservoir. A second embodiment accomplishes the reset on a time delay basis. There is also disclosed an optional intensifier for two-stage operation of said working motors and an optional intensifier for the retract stroke of said power unit to insure full retraction of the hydraulic working motors if so desired. Further included in the disclosure is a mechanism for readily and selectively limiting the working volume of the extensible pneumatic power motors as desired in relation to the number of working motors utilized.
REFERENCES:
patent: 2032185 (1936-02-01), Sciaky
patent: 2240287 (1941-04-01), Croll, Jr.
patent: 2759330 (1956-08-01), van Broekhoven
patent: 3001369 (1961-09-01), Allais
patent: 3257810 (1966-06-01), Hanni
patent: 3407601 (1968-10-01), Beck
patent: 3513656 (1970-05-01), Engle
patent: 3643725 (1972-02-01), Fismer
patent: 3942323 (1976-03-01), Maillet
patent: 4144904 (1969-03-01), Dits
patent: 4170876 (1979-10-01), Dits et al.
patent: 4187762 (1980-02-01), Buzby
patent: 4241581 (1980-12-01), Chace
patent: 4351153 (1982-09-01), Kosmala
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