Summation power output regulating system for at least two hydros

Details Summation power output regulating system for at least two hydros Summation power output regulating system for at least two hydros

1987-10-30

1989-11-14

Smith, Leonard E.

Pumps

Condition responsive control of drive transmission or pump...

Plural pumps with individual or relative control

60421, F04B 4908

Patent

active

048803596

ABSTRACT:
In a summation power output regulating system for first and second hydrostatic machines (3, 4), having a common drive and comprising at least two hydrostatic transmissions (1, 2), each of the machines (3, 4) having a hydraulic control device (7, 8), wherein the second machine (4) is provided with a hydraulic power output regulator (24) which regulates the pressure acting on the control device (8) in dependence on the power output of the second machine at that time and a control pressure, dependant on the working pressure of the first machine, is transmitted by means of a hydraulic actuator to the power output regulator (24), substantially 100% utilization of the power available is attained with a simple construction and function by providing the first machine (3) with a power output measuring valve (34; 63, 64) which determines the power output at the time and regulates the control pressure (P.sub.3) in dependence on the power output of the first machine.

REFERENCES:
patent: Re29333 (1977-08-01), Pewsa
patent: 3968650 (1976-07-01), Bacquie
patent: 4065228 (1977-12-01), McMillian
patent: 4379389 (1983-04-01), Leisener
patent: 4461148 (1984-07-01), Krusche
patent: 4750866 (1988-06-01), Entwistle

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