Patent ID: 6183230
Filing Date: 2001-02-06
Classification: F04C,Y10T

Abstract:
An oil pump for an internal combustion engine comprising a splined hub directly rotatable by a source of rotational input and having male splines extending about the outer perimeter of said splined hub, a pump body housing a gerotor pump set, said gerotor pump set including an internally lobed pumping annulus and a pump rotor having lobes along the outer surface of said pump rotor, to engage said internally lobed pumping annulus, and female splines along the inner surface of said pump rotor which compliment and receive said male splines of said splined hub for meshing engagement to operatively connect said splined hub and said gerotor pump set, and a splined isolator ring disposed between said pump rotor and said splined hub wherein the inner periphery of said isolator ring is configured for meshing engagement with said male splines of said splined hub and the outer periphery of said isolator ring is configured for meshing engagement with said female splines of said pump rotor and wherein said isolator ring is formed of a compliant material to minimize noise generation upon impacts between said splined hub and said pump rotor.