Rotary expansible chamber devices – Self-acting unidirectional flow with reverse rotation or...
Patent
1978-10-18
1981-01-27
Vrablik, John J.
Rotary expansible chamber devices
Self-acting unidirectional flow with reverse rotation or...
F04C 210, F04C 1502
Patent
active
042472679
ABSTRACT:
The pump drive shaft may rotate in either direction. The pump discharges liquid from the same port, regardless of the direction of rotation. A port on the pump mounting pad, which receives the discharge from the pump, may be in any of various locations. The pump has plural discharge ports at different locations on its base plate, one of which is aligned with the receiving port on the mounting pad. Any discharge port not used in any particular embodiment is blocked. The pump includes a base plate, a pump plate and a cover plate, aligned in a stack. In one modification, all fluid passages and a valve means which controls the direction of the flow are located in the base plate. In other modifications, a valve plate is provided, and the valve means is located in the valve plate. The fluid passages may be completely in the valve plate or partly in some of the other plates. All valves are simple structures trapped in chambers between or within the plates. Some modifications have noise reduction means, including a tortuous inlet passage and pump gear teeth wide enough to block that passage periodically. One embodiment has a valve which opens easily to a restricted flow position to facilitate purging of air from the pump.
REFERENCES:
patent: 1595381 (1926-08-01), Christensen
patent: 2148561 (1939-02-01), Kempton et al.
patent: 2277270 (1942-03-01), Schmitter et al.
patent: 2781726 (1957-02-01), Bangs
patent: 3208392 (1965-09-01), Garrison et al.
patent: 3960469 (1976-06-01), Lindtveit
Sid Harvey, Inc.
Vrablik John J.
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