Internal gear pump with recesses on the gear bearing surfaces

Details Internal gear pump with recesses on the gear bearing surfaces Internal gear pump with recesses on the gear bearing surfaces

2006-05-23

2006-05-23

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Moving cylinder

Rotating

C418S075000, C418S077000, C418S079000

Reexamination Certificate

active

07048524

ABSTRACT:
A positive-displacement pump, in particular for use in machines or dispensing fluids, including two elements that are with respect to one another and which mesh with one another (20, 30), each of them being rotatably mounted in the pump with centered coupling without interference with a corresponding centering body (18, 11a). At least one of the two above-mentioned ratable elements has a plurality of undercut regions (26, 34, 35) at the location of the centering walls. The undercut regions (26, 34, 35) comprise a wall portion which is spaced with respect to the facing wall of the respective centering body.

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