Pumps – Expansible chamber type – Pumping member position controlled port
Patent
1987-09-15
1989-08-08
Vrablik, John J.
Pumps
Expansible chamber type
Pumping member position controlled port
417500, 418 68, F04B 706, F04B 3910
Patent
active
048548375
ABSTRACT:
A rotary pump or motor is disclosed which includes a housing which defines a substantially cylindrical cavity having a central axis. A pair of stators are secured at each end of the cylindrical cavity and each stator has a cam surface defined by at least a pair of surface peaks circumferentially alternating with at least a pair of surface valleys, the stator cam surfaces being spaced apart and opposed to one another. A substantially cylindrical rotor having length and diameter dimensions is disposed for rotation within the cavity between the stators. The rotor includes first and second end cam surfaces configured for mating engagement with adjacent stator cam surfaces. Each rotor end face is a cam surface defined by at least a pair of surface peaks circumferentially alternating with at least a pair of surface valleys. A shaft is connected to the rotor for rotation therewith within the cavity while permitting axial movement between the shaft and the rotor. The rotor is spaced between the stators so as to reciprocate along the shaft between alternate mating engagement with each stator cam surface to define at least a pair of chambers between the rotor and each stator. Finally, a port mechanism is disposed in the housing to control the intake and discharge of fluid from the pair of chambers defined on each side of the rotor, the reciprocating rotor opening and closing the chambers and the port mechanism as it rotates and reciprocates within the cavity.
REFERENCES:
patent: 908916 (1909-01-01), Weinat
patent: 1229590 (1917-06-01), Dawe
patent: 3697201 (1972-10-01), Eickmann
patent: 4067668 (1978-01-01), Nimell
Cordray International Corporation
Isaac John L.
Margolis Donald W.
Vrablik John J.
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