Hydraulic actuator controlled by meter-in valves and variable pr

Details Hydraulic actuator controlled by meter-in valves and variable pr Hydraulic actuator controlled by meter-in valves and variable pr

1989-08-30

1992-02-18

Look, Edward K.

Motors: expansible chamber type

With motive fluid valve

Pilot valve

F15B 1104

Patent

active

050883844

ABSTRACT:
A hydraulic control system comprising a hydraulic actuator having opposed openings adapted to alternately function as inlets and outlets for moving an element of the actuator in opposite directions, a pump for supplying fluid to the actuator. A meter-in valve individual to each opening is provided to which fluid from the pump is supplied and a pair of lines extending from the respective meter-in valves to the respective openings of the actuator. A controller alternately supplies pressure to the respective meter-in valves for controlling the direction of movement of the load. A second pair of lines extends from the first pair of lines to tank and a variable pressure relief valve is positioned in each line of the second pair of lines. When the controller is moved to actuate one of the meter-in valves for supplying fluid to one of the openings of the actuator, the controller also actuates the variable relief valve associated with the line of the first pair of lines extending from the other of the openings of actuator to control the flow out of the other opening. The controller thus simultaneously controls the fluid flow and the pressure to the actuator and the fluid pressure from the actuator, thereby simultaneously controlling the driving and braking functions of the system.

REFERENCES:
patent: 4201052 (1980-05-01), Breeden et al.
patent: 4407122 (1983-10-01), Nanda
patent: 4475442 (1984-10-01), Breeden

Affiliated with

Also associated with

Rating

Hydraulic actuator controlled by meter-in valves and variable pr does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydraulic actuator controlled by meter-in valves and variable pr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic actuator controlled by meter-in valves and variable pr will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1815719