Methods of and apparatus for controlling hydraulic equipment

Details Methods of and apparatus for controlling hydraulic equipment Methods of and apparatus for controlling hydraulic equipment

1976-02-13

1977-08-16

Nilson, Robert G.

Motors: expansible chamber type

With motive fluid valve

Expanding chamber inlet controlled by contracting chamber...

91471, G05D 1600, F15B 1108

Patent

active

040418413

ABSTRACT:
A control for hydraulic equipment including a pressure fluid feed and a pressure fluid return, includes a spool valve arranged to sense the pressure of the pressure fluid in the return and to connect pressure fluid in the feed to exhaust should the sensed pressure fall below a preselected level.

REFERENCES:
patent: 3656560 (1972-04-01), Catterfeld
patent: 3908688 (1975-09-01), Gandrud
patent: 3951162 (1976-04-01), Wilke

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