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:
Oct. 23, 1984
Filed:
Apr. 21, 1982
Kiyohiko Watanabe, Chiryu, JP;
Kazuma Matsui, Toyohashi, JP;
Yoshiyuki Hattori, Toyoake, JP;
Toshihiro Takei, Kariya, JP;
Toshiaki Nakamura, Anjo, JP;
Shunsaku Ohnishi, Toyota, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A pump apparatus has a regenerative pump and a motor for driving the regenerative pump. A substantially annular flow passage is formed in the pump housing of the regenerative pump and communicated with a discharge port and a suction port. An impeller is rotatably housed in the pump housing. A plurality of radial vane grooves are formed circumferentially spaced in the outer peripheral portion of each surface of the impeller. A recess is formed in the portion of one of side surfaces of the flow passage aligned axially with the discharge port formed in the other side face of the flow passage.