Gear pump

Details Gear pump Gear pump

2005-05-24

2005-05-24

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Moving cylinder

Rotating

C418S015000, C418S075000, C418S078000, C418S189000

Reexamination Certificate

active

06896500

ABSTRACT:
A bottom portion of an intake port is provided with a sloped bottom surface formed of a plane such that sloped bottom surface approaches the side surfaces of external teeth and internal teeth from an upstream side to a downstream side in rotational direction of two rotors. Fluid that flows in the intake port is regulated by the sloped bottom surface and smoothly guided into individual inter-teeth chambers that are expanding. Since the sloped bottom surface on the bottom portion of the intake port is formed of a plane without spiral or twisting, design and manufacturing of a gear pump is extremely easy.

REFERENCES:
patent: 5413470 (1995-05-01), Eisenmann
patent: 4227301 (1994-02-01), None
patent: 61-061992 (1984-09-01), None
patent: 2588113 (1989-10-01), None
patent: 01273887 (1989-11-01), None
patent: 2854903 (1989-11-01), None
patent: 03189390 (1991-08-01), None
patent: 05180174 (1993-07-01), None
patent: 6-67876 (1994-09-01), None
patent: 9-4569 (1997-01-01), None

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