Rotary expansible chamber devices – With mechanical sealing – Seal on working member periphery separates inlet and outlet...
Patent
1994-12-16
1996-07-30
Vrablik, John J.
Rotary expansible chamber devices
With mechanical sealing
Seal on working member periphery separates inlet and outlet...
418168, F04C 210, F04C 1500
Patent
active
055405738
ABSTRACT:
The invention is directed to a sickleless internal gear pump with an internal ring gear and a pinion meshing with the ring gear. The ring gear has radial apertures for the medium being pumped, and sealing elements radially movably disposed in an appropriate profile groove, and inserted in respective tooth heads of the ring gear, or in the tooth heads of the pinion. The sealing elements are able to slide on the opposite tooth heads of the pinion, or of the ring gear. The head shape of the sealing element and the shape of the tooth space bottom of the ring gear, or of the pinion, are configured such that the sealing element establishes a seal between the pressure space and the suction space in the area of dead center.
REFERENCES:
patent: 748348 (1903-12-01), Cooley
patent: 2790394 (1957-04-01), Mori
patent: 2866417 (1958-12-01), Nubling
patent: 3306226 (1967-02-01), Walter
patent: 3429269 (1969-02-01), Walter
patent: 3619089 (1971-11-01), Pierrat
patent: 5135371 (1992-08-01), Arbogast
patent: 5354188 (1994-10-01), Arbogast et al.
Arbogast Franz
Peiz Peter
J.M. Voith & GmbH
Vrablik John J.
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