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:
May. 30, 2006
Filed:
Jul. 10, 2003
Applicants:
Masaru Amano, Kiryu, JP;
Kenichi Fujiki, Kiryu, JP;
Yasunori Ono, Kiryu, JP;
Inventors:
Assignee:
Yamada Manufacturing Co., Ltd., Kiryu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04C 18/00 (2006.01); F04C 2/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
To reduce noise caused by pulsation generated when fluid is expelled, in a trochoidal pump comprising an inner rotor and outer rotor having trochoidal toothed shapes. [Means of Solution] The inner rotorand outer rotorhaving trochoidal toothed shapes are set in such a manner that when they are in a mutually intermeshing state, a tip clearance dis created between the respective tooth crestsof the inner rotorand the outer rotor. In at least one position of this group of tip clearances d, a large clearance dforming a large interval is provided.