Rotary expansible chamber devices – Miscellaneous
Patent
1987-06-08
1988-07-19
Freeh, William L.
Rotary expansible chamber devices
Miscellaneous
1375135, 137855, F16K 1514, F04C 2344
Patent
active
047581417
ABSTRACT:
A vane pump having a plurality of working chambers each of whose volume changes from a minimum to a maximum value and back again during one revolution, and wherein intake and delivery ports open axially into the working cells and are formed with cross sections adapted for fluid conveyance without internal compression. Such compression is achieved by a valve plate which forms a non-return and is formed with a resilient tongue valve which, commencing from the starting end of the delivery port controls, upon proper pump operation, about two-thirds of the cross section of the mouth of the delivery port.
REFERENCES:
patent: 1555192 (1926-09-01), Dennedy
patent: 2151746 (1939-03-01), Cody
patent: 3256831 (1966-06-01), Eickmann
patent: 3306226 (1967-02-01), Walter
patent: 4514157 (1985-04-01), Nakamura
patent: 4696263 (1987-09-01), Boyesen
Freeh William L.
Pierburg GmbH
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