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:
Nov. 29, 2016
Filed:
Jul. 24, 2014
Applicant:
Jtekt Corporation, Osaka-shi, JP;
Inventors:
Assignee:
JTEKT CORPORATION, Osaka-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01C 21/18 (2006.01); F03C 2/08 (2006.01); F04C 2/08 (2006.01); F04C 15/06 (2006.01); F04C 2/10 (2006.01); F04C 15/00 (2006.01);
U.S. Cl.
CPC ...
F04C 2/10 (2013.01); F04C 2/086 (2013.01); F04C 2/102 (2013.01); F04C 15/0026 (2013.01); F04C 15/0049 (2013.01); F04C 2250/101 (2013.01);
Abstract
In a gear pump, an outer rotor and an inner rotor are disposed in a rotor installation chamber defined by a pump body and a pump cover. A suction port groove and a discharge port groove are formed in at least one of the pump body and the pump cover. A narrowing portion is formed at a portion of a radially outer side wall portion of the suction port groove, the portion being close to a terminal end wall portion of the suction port groove. The narrowing portion narrows the groove width in the radial direction. A pressurizing region that pressurizes oil in the gear chamber is formed between the narrowing portion and the terminal end wall portion.