Patent ID: 9291133
Filing Date: 2016-03-22
CPC Classification: F02M,F04B,Y10T

Claim Text:
1. A pump assembly to couple to a rotatable member, comprising: a pump housing having a housing chamber; a center shaft extending at least partially through the housing chamber and rotatable about a longitudinal axis; a plurality of reciprocating pistons disposed within the housing chamber radially about the center shaft; a cam unit, a central bore extending through the cam unit about the longitudinal axis to receive a portion of the center shaft, a distal end having a camming surface extending radially outward to engage each of the reciprocating pistons, a proximal end opposite the distal end having a shoulder portion; one or more bearing assemblies disposed along the cam unit between the distal and proximal ends of the cam unit; an adapter having a central opening extending therethrough about the longitudinal axis to engage the proximal end of the cam unit, a distally facing surface having a radial flange extending radially beyond the shoulder portion of the cam unit to abut the bearing assembly, and an outer radial surface to engage to a rotatable member; and a clamping device insertable through the central opening of the adapter and the central bore of the cam unit to fixedly attach to the center shaft.