Hydraulic control valve with maintenance-facilitating feature

Details Hydraulic control valve with maintenance-facilitating feature Hydraulic control valve with maintenance-facilitating feature

1983-06-06

1985-04-09

Garrett, Robert E.

Motors: expansible chamber type

With motive fluid valve

For double-acting motor

91 41, 91418, 13762427, F15B 13042, F15B 1526

Patent

active

045094071

ABSTRACT:
The control valve for an hydraulic actuator is provided with a particular operating state for venting the hydraulic system, which state is attainable positively whenever the hydraulic pressure is inadequate, e.g., in the case of venting or presence of air bubbles; a pressure-monitoring element permits positively the slide element of the control valve to be placed into the venting disposition, in that a particular stop on the slide rod cooperates with a plunger extending from the monitoring cylinder and being subject to the differential force between a spring and system pressure.

REFERENCES:
patent: 2276979 (1942-03-01), Jacobi
patent: 3285284 (1966-11-01), Junck et al.
patent: 3680583 (1972-08-01), Clair
patent: 3698434 (1972-10-01), Nelson

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