The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1983
Filed:
Jun. 08, 1981
Leonard N Franklin, Jr, Reese, MI (US);
Gary G Hegler, Chesaning, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A vane type hydraulic pump has a pressure plate, thrust plate, cam ring, rotor and vanes, which when assembled, are denoted as the pump rotating group. The thrust plate, pressure plate and cam ring are maintained in axial and angular alignment by a pair of dowel pins which extend between the plates and through the cam ring with a close fit relationship. The plates and cam ring are restrained from rotation by a dowel pin which extends between a close fit in the pump housing and a loose fit in the pressure plate. The rotating group is disposed in a cylindrical cavity in the pump housing which cavity has a diametral dimension cooperating with the outer diameter of the pressure plate and thrust plate to provide a sliding pilot fit at assembly thereby sharing the axial alignment constraint of the pair of dowel pins.