1. Field of the Invention
The present invention relates to compressors, pumps, and engines. More particularly, the present invention relates to a pumping apparatus that includes two housing or rotor sections that engage a spherical bearing that enables each housing section to rotate together but about different axes of rotation. These axes intersect to form an obtuse angle. Valved pistons on the housing sections pump fluid as the housing sections are rotated.
2. General Background of the Invention
The three predominate forms of pumping, driving and compressing that are available on the market at the time of this document are reciprocating, mechanical screw and rotary and centrifugal.
The following patent documents are incorporated herein by reference:
U.S. Pat. Nos.: 3,945,766; 4,277,228; 4,858,480; 5,249,512; 5,647,729; 6,352,418; 6,368,072; JP 02305381A and US2001/0014288.
U.S. Published patent application Ser. No. US2001/0014288 discloses a pump with a back and forth piston motion (see FIG. 12).