Internal gear pump for wide speed range

Details Internal gear pump for wide speed range Internal gear pump for wide speed range

1994-03-03

1995-05-09

Bertsch, Richard A.

Rotary expansible chamber devices

Moving cylinder

Rotating

418170, 418 78, F01C 110

Patent

active

054134706

ABSTRACT:
In an internal gear pump, which can also be constructed as pump with suction control, to reduce the undesired cavitation effects in the pressure region and to permit the oil to flow off from the diminishing displacement cells between the teeth of the gears, and impedance-controlled overflow passage is provided, the openings of which towards the moving displacement cells are alternately opened and closed by the teeth of at least one of the gears.

REFERENCES:
patent: 2544144 (1951-03-01), Ellis
patent: 4767296 (1988-08-01), Satomoto et al.

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