Device for controlling the pressure in a hydraulic pressure syst

Details Device for controlling the pressure in a hydraulic pressure syst Device for controlling the pressure in a hydraulic pressure syst

1990-10-23

1992-07-28

Look, Edward K.

Power plants

Pressure fluid source and motor

Condition responsive control of motive fluid flow

60468, 60459, 417295, F15B 710, G05D 1604

Patent

active

051331861

ABSTRACT:
Device for controlling the pressure in a hydraulic pressure system in which the output of a constantly running pump which feeds pressure medium to a pressure system is controlled by means of a suction throttle valve which itself is actuated as a function of the pressure in the pressure system of the vacuum in the connection between pump and suction throttle valve.
An over pressure in the pump output acts to close the throttle valve, while under vacuum in the pump outlet acts to open the throttle valve, thus allowing for a two point control without additional control valves.

REFERENCES:
patent: 3182596 (1965-05-01), Prijatel
patent: 3210939 (1965-10-01), Nuss
patent: 4237926 (1980-12-01), Walker
patent: 4413472 (1983-11-01), Lang
patent: 4470427 (1984-09-01), Maillochaud
patent: 4731999 (1988-03-01), Niemiec
Manuscript: "Grundlase der Olhydraulik" Prof. Dr. -Ing. W. Backe--6. Auflage Aug. 1986 pp. 7-40, 7-41.

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