Combined fixed and variable displacement pump system

Details Combined fixed and variable displacement pump system Combined fixed and variable displacement pump system

1975-04-23

1976-10-12

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Plural pumps with individual or relative control

417286, 417287, 417426, 60428, F04B 4900, F04B 2304

Patent

active

039854728

ABSTRACT:
A hydraulic pump arrangement and control circuit for supplying fluid at high volume and a high pressure to a work circuit. The system utilizes a fixed displacement pump, a variable displacement pump, a dual pressure compensator, and an unloading valve working together to provide high pressure fluid delivery while reducing the horsepower requirements of the fixed displacement pump and the variable displacement pump. High flow is provided through the utilization of the combined pumps and high pressure is attained through the unloading of the fixed displacement pump through the unloading valve and destroking of the variable displacement pump in response to signals provided by the dual pressure compensator.

REFERENCES:
patent: 2546034 (1951-03-01), Lansing
patent: 3060858 (1962-10-01), Shoosmith
patent: 3526468 (1970-09-01), Moon et al.
patent: 3695783 (1972-10-01), Soyland et al.
patent: 3723026 (1973-03-01), Soyland et al.
patent: 3732036 (1973-05-01), Busbey et al.
patent: 3841795 (1974-10-01), Ferre et al.

Affiliated with

Also associated with

Rating

Combined fixed and variable displacement pump system does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-939333