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:
Apr. 26, 2011
Filed:
Jun. 12, 2007
Applicants:
Takeshi Ueki, Tochigi, JP;
Shingo Ishige, Tochigi, JP;
Inventors:
Takeshi Ueki, Tochigi, JP;
Shingo Ishige, Tochigi, JP;
Assignee:
Showa Corporation, Gyoda-Shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01C 20/20 (2006.01); F01C 20/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a variable displacement pump, an outer peripheral surface approximately in an opposite side to a portion supported to an oscillation supporting point in a cam ring with respect to a pump shaft is formed as a convex surface portion holding a seal member brought into slidable contact with an inner peripheral surface of an outer case, and an inner peripheral surface of the outer case with which the seal member held to the convex surface portion of the cam ring is brought into slidable contact is formed as a circular arc surface around the oscillation supporting point.