Gear pump arrangement with erosion resistant insert

Details Gear pump arrangement with erosion resistant insert Gear pump arrangement with erosion resistant insert

2006-05-12

2009-10-27

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Interengaging rotating members

Like rotary members

C418S132000, C418S206800, C418S178000, C418S179000

Reexamination Certificate

active

07607906

ABSTRACT:
A gear pump arrangement comprising a pair of intermeshing gears (16, 18) located between bearing blocks (24) and rotatable to pump fluid from an inlet (12) to an outlet (14), wherein at least one of the bearing blocks (24) comprises a body (28) formed with a recess (32) within which an insert (34) is located, the recess (32) and insert (34) being shaped so as to be of smaller dimensions at a bearing surface (30) of the bearing block (24) than at a point remote therefrom.

REFERENCES:
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patent: 1991562 (1935-02-01), Lucas
patent: 3632240 (1972-01-01), Dworak
patent: 4036540 (1977-07-01), Seufert
patent: 4184722 (1980-01-01), Henniges
patent: 4253808 (1981-03-01), White
patent: 4523365 (1985-06-01), Richmond
patent: 6716010 (2004-04-01), Eaton et al.
patent: 2003/0053923 (2003-03-01), Eaton et al.
patent: 2027192 (1970-09-01), None
patent: 2262576 (1993-06-01), None
patent: 1360951 (1987-12-01), None
European Search Report dated Jun. 19, 2008.

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