Internal gear pump and an inner rotor of such a pump

Details Internal gear pump and an inner rotor of such a pump Internal gear pump and an inner rotor of such a pump

2004-07-07

2008-08-05

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Moving cylinder

Rotating

C074S462000, C475S180000

Reexamination Certificate

active

07407373

ABSTRACT:
An inner motor is structured to increase the discharge rate of an internal gear pump by making it possible to freely adjust the eccentricity e between the inner and outer rotors. Each tooth of the inner rotor includes a tooth bottom defined by hypocycloidal curves, an engaging portion to be brought into engagement with the outer rotor and defined by involute curves, and a tooth top defined by a predetermined curve such as a part of a circle or an oval or an epicycloidal curve.

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Chinese Office Action, with English Translation, issued in Chinese Patent Application No. CN 200480018532.2, issued on Jan, 11, 2008.

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