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:
Mar. 26, 1996
Filed:
Nov. 28, 1994
Applicant:
Inventors:
Tetsuyuki Ogawa, Handa, JP;
Hideki Nakayoshi, Kariya, JP;
Assignee:
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Primary Examiner:
Int. Cl.
CPC ...
F01C / ;
U.S. Cl.
CPC ...
418171 ; 418 71 ;
Abstract
In an oil pump having an inner rotor and an outer rotor supported in a housing, pressure in a pumping chamber whose volume is at maximum presses the inner rotor inwardly and the outer rotor outwardly. An oil groove which communicates with a discharge port via a lubricating groove is formed in an inner surface of the housing at the circumferential position of the pumping chamber whose volume is at maximum. The oil groove has axial sealing surfaces.