Variable torque fluid device

Details Variable torque fluid device Variable torque fluid device

1976-06-30

1978-08-22

Freeh, William L.

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Separate motive fluid control for each working chamber

F01B 1304

Patent

active

041080491

ABSTRACT:
A variable displacement device for converting fluid power into shaft power and vice versa. The fluid displacement device includes a body having a plurality of chambers and having ports for allowing fluid to be received in and expelled from the plurality of chambers. Plungers are associated with the plurality of chambers in a manner so as to vary the displacement volume of the plurality of chambers. A shaft is associated with the plungers for rotation in unison with the movement of the plungers. Valves are associated with the plurality of chambers for selectively allowing fluid to flow between a first port and at least one of the plurality of chambers and between a second port and at least one of the plurality of chambers. An actuating mechanism is provided for selectively moving the valves between a first position in which fluid is allowed to flow between the first port and at least one of the plurality of chambers and a second position in which fluid is allowed to flow between the second port and at least one of the plurality of chambers.

REFERENCES:
patent: 748083 (1903-12-01), Lemp et al.
patent: 751924 (1904-02-01), Relly
patent: 832830 (1906-10-01), Witham
patent: 2088582 (1937-08-01), Bishop
patent: 2391575 (1945-12-01), Huber
patent: 2844002 (1958-07-01), Pavesi
patent: 3426523 (1969-02-01), Straub
patent: 3741076 (1973-06-01), Tulp
patent: 3757647 (1973-09-01), Abramopaulos
patent: 4041843 (1977-08-01), Mischenko

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