Sickleless internal gear pump with cross-sectionally mushroom-sh

Details Sickleless internal gear pump with cross-sectionally mushroom-sh Sickleless internal gear pump with cross-sectionally mushroom-sh

1993-12-06

1995-09-19

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

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

418124, 418168, F04C 210, F04C 1500

Patent

active

054511500

ABSTRACT:
The invention relates to a sickleless internal gear pump with an internally toothed ring gear and a pinion meshing with the ring gear. The pinion and ring gear are rotatably mounted in a housing having a suction port and a pressure port. The ring gear includes radial ports for the medium to be pumped. The tooth heads of the ring gear or the tooth heads of the pinion have a profile groove into which a plurality of sealing elements are respectively inserted. The sealing elements are able to slide on the radially opposite tooth of the pinion or ring gear. The invention is characterized by a profile groove, viewed in axially perpendicular section, which has no ports. The individual sealing elements are provided with a channel establishing a fluid connection between the interior of the profile groove and the sealing face of the sealing element. The channel, viewed in the direction of rotation of the pinion, is enveloped by the material of the sealing element.

REFERENCES:
patent: 726896 (1903-05-01), Franzen
patent: 748348 (1903-12-01), Cooley
patent: 2866417 (1958-12-01), Nubling
patent: 3429269 (1969-02-01), Walter
patent: 3758243 (1973-09-01), Fox, Jr.
patent: 5135371 (1992-08-01), Arbogast
U.S. application Ser. No. 07/988,039, Peiz, Filed Dec. 7, 1992.

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