Gear pump with improved inlet port

Details Gear pump with improved inlet port Gear pump with improved inlet port

2011-04-12

2011-04-12

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Moving cylinder

Rotating

C418S189000, C418S190000

Reexamination Certificate

active

07922468

ABSTRACT:
A gear pump is provided and includes an inlet port which terminates, in the pumping direction of the rotor set, in a radially inwardly extending ramp portion. The ramp portion operates to direct working fluid from an inlet radially inwardly into a pumping chamber of the rotor set which is passing over the ramp portion. By closing the pumping chamber at a radially inwardly point, the filling efficiency of the pumping chamber is improved, reducing cavitation and/or operating noise of the pump.

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