Output regulation in hydraulic and hydropneumatic systems

Details Output regulation in hydraulic and hydropneumatic systems Output regulation in hydraulic and hydropneumatic systems

1977-01-31

1978-10-03

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

With condition responsive control of pump fluid valve

417 43, 417213, 60431, 60468, F09B 4908, F16D 3102

Patent

active

041181492

ABSTRACT:
Apparatus for regulating the output of a system feed with a fluid medium irrespective of the instantaneous pressure in the system comprising a regulating device including an adjustable throttling connected in the inlet line of the system. A preset non-return valve is connected downstream of the throttling and a spring loaded non-return valve is connected in series with the preset non-return valve and is fitted with a leakage connection extending to a reservoir tank. A control line is connected between the pre-set non-return valve and the spring loaded non-return valve and it senses pressure drop at the throttling so that when the pressure drop reaches a predetermined value the non-return valve opens so that fluid medium is transferred and pressure in the control line increases. A central device is connected in the control line for regulating a quantity of flow to the primary line and the control device comprises a spring loaded piston actuated by increased pressure in the control line.

REFERENCES:
patent: 3067693 (1962-12-01), Lambeck
patent: 3635021 (1972-01-01), McMillen et al.
patent: 3768928 (1973-10-01), Miller et al.
patent: 3812676 (1974-05-01), Smith
patent: 3820920 (1974-06-01), Klimaszewski et al.
patent: 3856436 (1974-12-01), Lonnemo
patent: 3921503 (1975-11-01), Kubik
patent: 3986357 (1976-10-01), Hoffman
patent: 3987625 (1976-10-01), Swatty

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