Reversible gerotor pump

Details Reversible gerotor pump Reversible gerotor pump

1978-02-16

1980-03-18

Vrablik, John J.

Rotary expansible chamber devices

Self-acting unidirectional flow with reverse rotation or...

418171, F04C 106, F04C 1502

Patent

active

041937465

ABSTRACT:
A reversible gerotor pump is shown which delivers a lubricant in a predetermined manner regardless of direction of rotation. The reversibility is provided by an eccentric collar having a cylindrical opening encircling the pump rotor and which is rotatable through a 180.degree. arc by frictional engagement with the rotor. To ensure this frictional engagement is greater than the frictional engagement between the collar and an adjacent stationary face plate which opposes rotation of the eccentric collar, the surface of the collar in facing engagement with the plate defines slight protrusions projecting therefrom. The protrusions abut the plate for a limited surface engagement therebetween and therefore provide limited frictional engagement. In this manner the friction between the collar and the stationary plate is minimized and the eccentric collar is relatively free to be rotated to either of two extreme positions within the 180.degree. arc depending upon the direction of the rotation of the rotor.

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