Internal gear pump with radial openings

Details Internal gear pump with radial openings Internal gear pump with radial openings

1991-03-11

1992-08-04

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

Seal on working member periphery separates inlet and outlet...

418168, F04C 210

Patent

active

051353717

ABSTRACT:
A crescent-less internal gear pump. The internally geared wheel has a plurality of radial openings from its peripheral surface into the tooth gaps at the tooth base. The axial width of the pinion and/or the internally geared wheel is at least as great as the diameter of the rolling circle of the pinion. The filling of the inside of the pump through radial openings makes it possible to make the internally geared wheel as axially wide as the suction connection or as that part of the housing which receives the active gear parts participating in the formation of the delivery stream. It is possible to develop the axial width of the toothing considerably larger than the diameter of the rolling circle of the pinion. Complete filling of the tooth gaps with pressure fluid is assured without the occurrence of flow velocities at which the formation of noise or other disadvantages is to be expected. The pump can also be provided with two internally geared wheels arranged alongside each other.

REFERENCES:
patent: 748348 (1903-12-01), Cooley
patent: 1004776 (1911-10-01), Green
patent: 2458958 (1949-01-01), Pigott et al.
patent: 2790394 (1957-04-01), Mori
patent: 4028023 (1977-06-01), Labus
patent: 4934913 (1990-06-01), Pippes

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