Variable displacement pump control

Details Variable displacement pump control Variable displacement pump control

1977-08-31

1979-03-06

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Having condition responsive pumped fluid control

F04B 4900, F04B 130

Patent

active

041428412

ABSTRACT:
A variable displacement pump control having, in addition to a pressure compensator (with or without an auxiliary modulator), a multi-purpose valve which is open at pump startup to purge air therefrom, which is automatically closed after purging of the air, and which is opened in the manner of a relief valve responsive to a sudden rise in pump discharge pressure caused as by rapid closing of a directional control valve. The control is further characterized in that the pressure compensating pilot valve also constitutes a pilot valve for the multi-purpose valve to permit opening of a relief passage by the latter when pump discharge pressure suddenly rises.

REFERENCES:
patent: 3082693 (1963-03-01), Budzich
patent: 3512178 (1976-05-01), Russell
patent: 3726093 (1973-04-01), Malott
patent: 3866419 (1975-02-01), Paul
patent: 3908519 (1975-09-01), Born et al.
patent: 3941513 (1976-03-01), Malott
patent: 3945764 (1976-03-01), Marietta
patent: 3948147 (1976-04-01), Schweiberdingen

Affiliated with

Also associated with

Rating

Variable displacement pump control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable displacement pump control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable displacement pump control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-919412