Piston pump with a rotating piston

Details Piston pump with a rotating piston Piston pump with a rotating piston

1984-01-12

1985-07-30

Smith, Leonard E.

Pumps

Expansible chamber type

Pumping member position controlled port

74 41, 74 49, 74 22R, F04B 904

Patent

active

045318972

ABSTRACT:
A piston pump with a rotating piston is driven by a motor. A crank is provided on the motor shaft and has a first rolling surface on its front side. A further rolling surface engages the first rolling surface, the further rolling surface being provided on an arm which is connected fixedly to the pump piston. In one preferred embodiment, the crank is coupled with the piston in such a manner that a projection on a part connected fixedly with the piston engages a recess in the crank. An arrangement is provided for maintaining the contact between the rolling surfaces during the suction stroke of the pump. The piston controls an inlet opening and an outlet opening to the chamber in which it is movably supported. The transmission of forces during the discharge stroke through surfaces which roll on one another results in a long lifetime of the pump and quiet running.

REFERENCES:
patent: 3168872 (1965-02-01), Pinkerton
patent: 3382812 (1968-05-01), Smith

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