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:
Sep. 04, 2007
Filed:
Jan. 21, 2005
Frederick J. Rozario, Fenton, MI (US);
Dennis Kitching, Clarkston, MI (US);
William A. Berry, Davison, MI (US);
Allen G. Sheppard, St. Catherines, CA;
Frederick J. Rozario, Fenton, MI (US);
Dennis Kitching, Clarkston, MI (US);
William A. Berry, Davison, MI (US);
Allen G. Sheppard, St. Catherines, CA;
General Motors Corporation, Detroit, MI (US);
Abstract
A pump includes a housing defining an internal chamber having an axial inlet passage, a generally radial passage with an outlet to a volute. A rotatable impeller, disposed within the chamber, has a conical rear shroud sloping away from the axial inlet to define a rear recess. A shaft seal is disposed within the recess to minimize the axial length of the pump. A front surface of the shroud carries vanes operable to impel fluid from the axial inlet passage to the volute. Portions of the vanes extend forward into the axial inlet passage to induce coolant pre-rotation in the inlet passage and to improve pump efficiency. Pump efficiency may be further increased by a conical wall defining the axial inlet passage, a sloped wall defining the radial passage and a large radius between the axial inlet and the sloped wall to smooth fluid flow between the axial inlet passage and the volute.