Feed pump for a hydraulic system

Details Feed pump for a hydraulic system Feed pump for a hydraulic system

1994-01-04

1994-12-20

Bertsch, Richard A.

Pumps

Expansible chamber type

Having means for holding pressure responsive distributor open

137316, 137539, F04B 700

Patent

active

053741676

ABSTRACT:
A feed pump for a hydraulic system that is equipped with at least one outlet valve whose valve-closing body is loaded by a valve spring. The valve-closing body is held at a distance form its valve seat by means of a gas-filled hollow-body ring so that the feed pump can be evacuated through its outlet valve for subsequent filling with a hydraulic pressure medium. With a first increase in pressure in the system, the hollow-body ring is pressed together, so that the valve-closing body slips through the hollow-body ring and reaches its valve seat, thus making the outlet valve operational. The feed pump is suitable for use as a return pump for anti-skid systems of hydraulic brake systems.

REFERENCES:
patent: 865151 (1907-09-01), Andrew
patent: 3771908 (1973-11-01), Rosen
patent: 5123819 (1992-06-01), Schuller et al.

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