VANE-TYPE OIL PUMP Russian patent published in 2011 - IPC F04C2/344 

FIELD: engines and pumps.

SUBSTANCE: pump includes housing 1, rotor 2 with radial slots 3 in which operating plates 5 are located. In housing 1 there is cavity with inlet and delivery holes 7 and 9, which is formed with two pairs of symmetrically located arches of larger and smaller radii. Operating plates 5 are equipped with T-shaped heads. For better contact with inner surface of cavity of housing 1 the central part of outer surface of head has the radius which is equal to smaller radius of cavity of housing 1, and side parts have the radius which is equal to larger radius of cavity of housing 1. On rotor there are cavities 11 which are companion with respect to heads, and inner ends of radial slots are connected to each other by means of groove 4.

EFFECT: higher reliability and enlarged service life of pump owing to enlarged surface area of contact of heads.

2 dwg