Arrangement for influencing the operating quantity of a servomot

Details Arrangement for influencing the operating quantity of a servomot Arrangement for influencing the operating quantity of a servomot

1981-10-26

1982-12-21

Michalsky, Gerald A.

Motors: expansible chamber type

With motive fluid valve

Contracting chamber exhaust valve controlled by expanding...

91447, 1375961, F15B 1304

Patent

active

043643043

ABSTRACT:
The invention relates to a fluid pressure supply and exhaust system for controlling a two part servomotor wherein relative loads are anticipated for one side of the servomotor. The system has a switching valve unit for selecting parallel supply and exhaust branches to direct supply fluid to the servomotor side subjected to negative loading. There are pressure regulating and throttling valves in the supply branch and a reducing valve in the exhaust branch. The supply pressure downstream from the throttle valve is directed to the reducing valve with a valve closing effect so that a sharp negative load will simultaneously reduce the supply pressure to the servomotor while increasing the throttling of the return flow.

REFERENCES:
patent: 3559534 (1971-02-01), Munro
patent: 3633461 (1972-01-01), Komatsu
patent: 3882896 (1975-05-01), Budzich
patent: 4008731 (1977-02-01), Katz
patent: 4018136 (1977-04-01), Kaetterhenry
patent: 4020867 (1977-05-01), Sumiyoshi

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