Rotary toothed oil pump having rotor positioning protrusions

Details Rotary toothed oil pump having rotor positioning protrusions Rotary toothed oil pump having rotor positioning protrusions

1997-08-29

2000-02-15

Vrablik, John J.

Rotary expansible chamber devices

Moving cylinder

Rotating

F04C 210

Patent

active

060245506

ABSTRACT:
An oil pump of the type which includes a pump housing formed with an axial bore for support of an input shaft and a cylindrical recess the center of which is eccentrically displaced from the center of the axial bore, an inner rotor formed at its inner periphery with at least a pair of diametrically opposed radial projections for engagement with the input shaft disposed in the axial bore and at its outer periphery with a plurality of external teeth and being mounted on the input shaft within the pump housing for rotation therewith in a condition where opposite side faces of the inner rotor are slidable in contact with a pair of axially opposed internal side faces of the pump housing, and an outer rotor formed at its inner periphery with a plurality of internal teeth for engagement with the external teeth of the inner rotor and being coupled within the cylindrical recess of the pump housing, wherein the diametrically opposed radial projections of the inner rotor are integrally formed at their one ends with an axial protrusion respectively to be coupled with the axial bore of the pump housing for positioning the inner rotor in place without causing any frictional contact therewith.

REFERENCES:
patent: 2694367 (1954-11-01), Seavey
patent: 5314319 (1994-05-01), Nilsson et al.

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