Rotary expansible chamber devices – With changeable working chamber magnitude – Intermeshing rotary members
Patent
1986-08-11
1988-04-26
Vrablik, John J.
Rotary expansible chamber devices
With changeable working chamber magnitude
Intermeshing rotary members
418 26, 418 27, 418 74, F04C 218, F04C 1504
Patent
active
047401427
ABSTRACT:
A gear pump in which one rotating, toothed pump gear is supported axially displaceable in the pump casing and engaging an axially displaceable sliding part at least on the one face wall of the pump gear. The sliding part is adapted to overlap the operating space or zone of engagement of the displaceable pump gear against the other, axially stationary pump gear, with hydraulic relief provided by the pump casing and/or the sliding part by pocket-like recesses on the side diametrically opposing the pressure side of the pump across the displaceable pump gear, the recesses hydraulically communicating with the pressure side of the pump.
REFERENCES:
patent: 2079375 (1937-05-01), McCollum
patent: 2212994 (1940-08-01), Vrolix
patent: 2293126 (1942-08-01), Fersing
patent: 2526830 (1950-10-01), Purcell
patent: 3029739 (1962-04-01), Nagely
Reimann Jochen
Rohs Hans-Gunther
Rohs Ulrich
Voigt Dieter
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