Crescentless internal gear pump

Details Crescentless internal gear pump Crescentless internal gear pump

1999-01-22

2000-08-01

Denion, Thomas

Rotary expansible chamber devices

Moving cylinder

Rotating

418112, 418113, 418124, F01C 110

Patent

active

060957824

ABSTRACT:
A crescentless internal gear pump includes a housing with an intake connection and a pressure connection. An internally toothed internal gear has an outside surface and is disposed for rotation within the housing. Each tooth includes a head and a base, the internal gear having radial openings that form a conducting connection between a tooth base and the outside surface. A pinion, which is rotatably disposed within the housing and meshing with the internal gear, has teeth with each tooth including a head. The teeth of one of the internal gear and pinion, includes a profile groove with a base provided in the heads into which a sealing element is disposed and which slides on an opposing tooth head. The sealing element has a sealing surface and includes a channel that produces a conducting connection between the profile groove base and the sealing surface. The sealing element is slightly movable in the profile groove in the radial direction to form a controlled gap.

REFERENCES:
patent: 2790394 (1957-04-01), Mori
patent: 3429269 (1969-02-01), Walter
patent: 5354188 (1994-10-01), Arbogast et al.
patent: 5399079 (1995-03-01), Peiz et al.
patent: 5540573 (1996-07-01), Arbogast et al.

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