Pumps – With condition responsive pumped fluid control – Inlet throttle or stop valve
Patent
1989-01-24
1990-03-27
Koczo, Michael
Pumps
With condition responsive pumped fluid control
Inlet throttle or stop valve
137488, F04B 4902
Patent
active
049116150
ABSTRACT:
An unloader device for controlling the output of a hydraulic pump, for example, in a constant pressure-type motor vehicle braking circuit. Delivery to hydraulic accumulators in the circuit is halted by a resilient seal defining an annulus forming part of the inlet fluid flow path to the pump and to which the pump delivery pressure is applied to expand the seal in the sense to close the annulus, by a valve operable when the delivery pressure reaches a predetermined value.
REFERENCES:
patent: 2594132 (1952-04-01), Dalrymple
patent: 3304872 (1967-02-01), English
patent: 4371317 (1983-02-01), Heibel
Clayton Dewandre & Co. Ltd.
Falce G. J.
Koczo Michael
Makosy Douglas J.
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