Suction-controlled gear ring pump

Details Suction-controlled gear ring pump Suction-controlled gear ring pump

1990-10-04

1992-03-17

Bertsch, Richard A.

Rotary expansible chamber devices

Moving cylinder

Rotating

418 15, 418189, F04C 1504, F04C 210

Patent

active

050963970

ABSTRACT:
A suction controlled gear ring pump effects a continuous decrease of the vacuum occurring in the feed cells of the pump at higher rotational speeds due to the long movement path of the feed cells from the end of the suction region to the beginning of the discharge opening and the thereby occurring diminution of the feed cells. In order to prevent squeeze oil when working at a lower rotating speed, the feed cells positioned successively in the feed direction are connected between the teeth respectively with the neighboring feed cells by overflow channels extending through the gear teeth, check valves in said overflow channels preventing a flow against the feed direction.

REFERENCES:
patent: 2468373 (1949-04-01), Makaroff
patent: 4233003 (1980-11-01), Jeng
patent: 4443169 (1984-04-01), Merz
patent: 4750867 (1988-06-01), Hertell et al.
patent: 4850814 (1989-07-01), Hertell et al.

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