Rotary expansible chamber devices – With mechanical sealing – Axially movable end wall or end wall portion
Patent
1994-03-08
1995-05-23
Bertsch, Richard A.
Rotary expansible chamber devices
With mechanical sealing
Axially movable end wall or end wall portion
418135, F01C 1908
Patent
active
054175569
ABSTRACT:
A floating bearing having an oval body located in a cavity along with a fixed bearing retains a pair of intermeshing gear members in the cavity in a housing of a pump. A spacer member engages an axial rib on the oval body to form a control chamber between the spacer member and the oval body. A resilient member provides an initial force which urges the floating bearing into engagement with the pair of intermeshing gears and forms a gap between the spacer and the oval body. Entrance fluid pressure from an entrance chamber is communicated to the control chamber while discharge fluid pressure from a discharge chamber is communicated to the gap. The entrance and discharge fluid pressures act on the floating bearing to provides a secondary force which urges the floating bearing into engagement with the pair of intermeshing gears to seal the entrance chamber from the discharge chamber.
REFERENCES:
patent: 2665641 (1954-01-01), Lauck
patent: 3294028 (1966-12-01), Dahl
patent: 3490382 (1970-01-01), Joyner
patent: 3664777 (1972-05-01), Aoki
patent: 4097206 (1978-06-01), Schonherr
Allied-Signal Inc.
Bertsch Richard A.
Freay Charles G.
McCormick Jr. Leo H.
Palguta Larry J.
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