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. 01, 1984
Filed:
Apr. 26, 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 fuel pump apparatus has an electric motor and a regenerative pump having a pump housing and an impeller rotated by the motor shaft journalled by a bearing to the pump housing. The impeller is operative to produce in the pump housing a fluid pressure which is unbalanced in the circumferential direction of the impeller and forms circumferentially unbalanced radially inward forces the resultant force of which is applied through the impeller to a first side of the peripheral surface of the shaft. The discharge port of the pump is open to the interior space within the motor. An opening is formed in the bearing and has an inner end faced to a second side of the peripheral surface of the motor shaft substantially diametrically opposite to the first side, whereby the discharge pressure of the pump is applied through the motor interior space and through the opening in the bearing to the second side of the motor shaft to counterbalance to the resultant force of the circumferentially unbalanced radially inward forces applied to the motor shaft.