Fluid circuit for operating a bidirectional hydraulic motor with

Details Fluid circuit for operating a bidirectional hydraulic motor with Fluid circuit for operating a bidirectional hydraulic motor with

1984-08-30

1986-12-16

Chambers, A. Michael

Power plants

Pressure fluid source and motor

Condition responsive control of motive fluid flow

60468, 60494, F16D 3102

Patent

active

046286900

ABSTRACT:
A hydraulic circuit is disclosed for driving a bidirectional hydraulic motor from a pump via a hand operated directional control valve, as for propelling an earthmover or actuating an implement assembly thereon. For mitigating an abrupt pressure rise as when the motor is set into or out of rotation, the circuit has a pair of oppositely directed dual pressure relief valves connected in parallel with each other between a pair of main lines extending between motor and directional control valve. Each dual pressure relief valve is normally conditioned to pass at a predetermined lower pressure the pressurized fluid from one of the main lines and to pass at a predetermined higher pressure the pressurized fluid from the other main line. When pilot operated from a timing valve responsive to a pressure differential between the main lines, that one of the relief valves which has been bleeding off the pressurized fluid at the low pressure is closed, with the result that the pressurized fluid is then released at the high pressure through the other relief valve, thereby causing two stepwise pressure rises for the reduction of a shock. The invention proposes the provision of a variable resistor between the timing valve and each main line for variably delaying the pilot actuation of the relief valves by the timing valve.

REFERENCES:
patent: 3636708 (1972-01-01), Karmon et al.
patent: 3945457 (1976-03-01), Olsen
patent: 3948146 (1976-04-01), Mauer et al.
patent: 4202175 (1980-05-01), Hale et al.
patent: 4212229 (1980-07-01), Johnson
patent: 4362018 (1982-12-01), Torii
patent: 4520625 (1985-06-01), Sato et al.

Affiliated with

Also associated with

Rating

Fluid circuit for operating a bidirectional hydraulic motor with does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fluid circuit for operating a bidirectional hydraulic motor with, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid circuit for operating a bidirectional hydraulic motor with will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-237652