Inner gear being biased to pump cover due to meshing of...

Details Inner gear being biased to pump cover due to meshing of... Inner gear being biased to pump cover due to meshing of...

2011-01-11

2011-01-11

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

C418S132000, C418S171000, C418S181000, C475S296000, C192S003280

Reexamination Certificate

active

07866965

ABSTRACT:
A gear pump has a pump housing formed with a gear receiving recess, a pump cover coupled with the pump housing to cover the gear receiving recess, a hydraulic passage that uses the gear receiving recess as a passage part thereof, and annular inner and outer gears operatively installed in the gear receiving recess. The inner and outer gears are of a bevel type and meshed with each other in such a manner as to bias the inner gear in a direction to reduce the thickness of the passage part when the inner gear is rotated while turning the outer gear therearound.

REFERENCES:
patent: 3695791 (1972-10-01), Brundage
patent: 5759013 (1998-06-01), Miyazaki et al.
patent: 6758786 (2004-07-01), Lepelletier
patent: 7445438 (2008-11-01), Ronk et al.
patent: 2004/0045752 (2004-03-01), Omote et al.
patent: 2005/0210971 (2005-09-01), Satoh
patent: 2003-172269 (2003-06-01), None

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