Fluid pressure device and improved Geroler.RTM. for use therein

Details Fluid pressure device and improved Geroler.RTM. for use therein Fluid pressure device and improved Geroler.RTM. for use therein

1976-08-23

1978-04-04

Croyle, Carlton R.

Pumps

With condition responsive pumped fluid control

Bypass or relief valve controls venting by movable pump...

417310, 418 61B, 418157, F04B 4900, F04C 102

Patent

active

040824802

ABSTRACT:
A rotary fluid pressure device such as a motor or pump of the type utilizing a Geroler.RTM. gear set. The internal teeth of the Geroler.RTM. are tubular members mounted on bearings to be slightly movable. Between each adjacent pair of tubular teeth is a check valve in the form of a roller which is mounted to be movable slightly more than are the tubular teeth. A resilient band surrounds the rollers, biasing each of them inwardly toward engagement with the adjacent teeth, but permitting each of the roller check valves to move out of sealing engagement with the adjacent teeth when the fluid pressure in the adjacent volume chamber exceeds the combined biasing force of the resilient band and the fluid in the outer fluid chamber. The invention provides a low cost Geroler.RTM. gear set permitting greater manufacturing tolerances, and having improved low speed characteristics and volumetric efficiency, resulting from minimized tooth-tip leakage.

REFERENCES:
patent: 2912937 (1959-11-01), Insley
patent: 3139835 (1964-07-01), Wilkinson
patent: 3778197 (1973-12-01), Takagi
patent: 3964842 (1976-06-01), White, Jr.

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