Self unloading pump circuit for an automatic transmission having

Details Self unloading pump circuit for an automatic transmission having Self unloading pump circuit for an automatic transmission having

1988-03-04

1989-07-25

Smith, Leonard E.

Pumps

With condition responsive pumped fluid control

Plural pump units with individual or relative control

60422, 60430, F04B 2304

Patent

active

048508136

ABSTRACT:
A pump and regulator valve assembly having multiple pump and multiple regulator valve means that establish pressures of two or more operating pressure levels in a control system wherein the valve means has multiple valves that selectively respond to varying flow demands of the different regions of the control system to connect one or more pumps to reduced pressure regions when the flow demands of higher pressure regions are satisfied.

REFERENCES:
patent: 2769458 (1956-11-01), Misch
patent: 3309939 (1967-03-01), Pierce, Jr.
patent: 3385312 (1968-05-01), Kinnamon et al.
patent: 3446098 (1969-03-01), Searles
patent: 3692432 (1972-09-01), Liang et al.
patent: 3951575 (1976-04-01), Motomura et al.
patent: 4514147 (1985-04-01), Borman et al.
patent: 4609330 (1986-09-01), Fahey et al.

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