Sickleless internal gear pump

Details Sickleless internal gear pump Sickleless internal gear pump

1995-06-07

1996-12-10

Freay, Charles G.

Rotary expansible chamber devices

With mechanical sealing

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

418 79, 418168, 418171, F01C 1906

Patent

active

055825141

ABSTRACT:
A sickleless internal gear pump with an internally toothed ring gear and a pinion meshing with the ring gear, the two fitted rotatably in a common casing. The ring gear includes radial conduits for the medium to be pumped and elements which are radially movably fitted in grooves in the tooth heads of the ring gear or pinion. The sealing elements slide on the opposing tooth head of the pinion or ring gear and include control spaces on which pressure is applied from the rear. For pressure application in the control spaces there is machined at least one control slot in the area of the pressure buildup zone, on at least one side of the part of the casing which laterally bounds the ring gear and pinion.

REFERENCES:
patent: 2866417 (1958-12-01), Nubling
patent: 3680989 (1972-08-01), Brundage
patent: 5451150 (1995-09-01), Arbogast et al.

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