Hydraulic control system for off-highway self-propelled work mac

Details Hydraulic control system for off-highway self-propelled work mac Hydraulic control system for off-highway self-propelled work mac

1981-05-29

1984-05-22

Hershkovitz, Abraham

Power plants

Pressure fluid source and motor

Servo-motor having externally operated control valve sets...

60420, 60452, 60465, F16H 3946

Patent

active

044493665

ABSTRACT:
A hydraulic excavator is disclosed which includes two sets of manual control valves for selectively placing a pair of variable displacement pumps in and out of communication with hydraulically driven components such as propelling motors, arm cylinders and boom cylinders. In order to minimize the per-cycle displacement of the pumps when same are discommunicated from all the driven components, a sensing valve is provided which is pilot operated from the sets of manual control valves. When all the manual control valves are in neutral, the sensing valve directs pressurized fluid from a charging pump to a pump-displacement adjustment mechanism thereby causing same to reduce the per-cycle displacement of the pumps to a minimum.

REFERENCES:
patent: 4129987 (1978-12-01), Blume
patent: 4199942 (1980-04-01), Kasper

Affiliated with

Also associated with

Rating

Hydraulic control system for off-highway self-propelled work mac 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 control system for off-highway self-propelled work mac, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic control system for off-highway self-propelled work mac will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1472077