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:
Jul. 02, 2019
Filed:
Aug. 04, 2015
Applicant:
Toyooki Kogyo Co., Ltd., Okazaki-shi, Aichi, JP;
Inventor:
Noritaka Watanabe, Okazaki, JP;
Assignee:
TOYOOKI KOGYO CO., LTD., Okazaki-Shi, Aichi, JP;
Primary Examiner:
Int. Cl.
CPC ...
F04C 2/08 (2006.01); F04C 2/10 (2006.01); F04C 15/00 (2006.01); F04C 18/08 (2006.01); F04C 18/10 (2006.01);
U.S. Cl.
CPC ...
F04C 2/084 (2013.01); F04C 2/10 (2013.01); F04C 15/00 (2013.01); F04C 18/084 (2013.01); F04C 18/10 (2013.01); F04C 2240/20 (2013.01); F04C 2250/301 (2013.01);
Abstract
Provided is an internal gear pump. The shape of any one of a plurality of external teeth and a plurality of internal teeth of the pump is formed on the basis of formulae (1)-(5).·cos θ,  Formula (1):=()+1/4{1−cos(2θ)},  Formula (2):=1/4{−2θ+sin(2θ)},  Formula (3):·cos θ,  Formula (4):·sin θ  Formula (5):.