Patent ID: 7029241

Claim:
A pump apparatus comprising: a) a first housing section having a concave surface portion; b) a second housing section having a concave surface portion; c) a first shaft for rotating with the first housing section about a first axis; d) a second shaft for rotating the second housing section about a second axis that forms an obtuse angle with the first axis; e) a spherically shaped bearing member that engages the respective concave surface portion of the first and second housing sections, said spherically shaped bearing member being intersected by both axes and defining a center of rotation for both the first and the second housing sections; f) a plurality of valved pistons positioned circumferentially around said spherically shaped bearing member, each piston having a first portion on the first housing section and a second portion on the second housing section, the pistons interconnecting the first and second housing sections so that when one housing section is rotated, the other housing section rotates with it; g) means for rotating one of the shafts; and h) a fluid flow path that transmits fluid through the housing sections using the pistons, wherein each piston reciprocates to pump fluid under pressure as the housing sections rotate.