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:
Feb. 17, 2009
Filed:
Aug. 04, 2006
Applicants:
Martin A. Clements, North Royalton, OH (US);
Lowell D. Hansen, Sagamore Hills, OH (US);
Inventors:
Martin A. Clements, North Royalton, OH (US);
Lowell D. Hansen, Sagamore Hills, OH (US);
Assignee:
Argo-Tech Corporation, Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F03C 2/00 (2006.01); F04C 14/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
Vane pump () mechanical losses are reduced by removing vane friction losses and replacing them with lower magnitude journal bearing fluid film viscous drag losses. A freely rotating cam ring () is supported by a journal bearing (). A relatively low sliding velocity is imposed between the cam ring and the vanes (). This permits the use of less expensive and less brittle materials in the pump by allowing the pump to operate at much higher speeds without concern for exceeding vane tip velocity limits.