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. 25, 2014
Filed:
Jun. 30, 2010
Nobuyoshi Yamashita, Kuwana, JP;
Natsuhiko Mori, Kuwana, JP;
Toshiyuki Mizytani, Kuwana, JP;
Takeshi Shimazaki, Awara, JP;
Koji Yamagata, Awara, JP;
Nobuyoshi Yamashita, Kuwana, JP;
Natsuhiko Mori, Kuwana, JP;
Toshiyuki Mizytani, Kuwana, JP;
Takeshi Shimazaki, Awara, JP;
Koji Yamagata, Awara, JP;
NTN Corporation, Osaka, JP;
Fukui Byora Co., Ltd., Fukui, JP;
Abstract
A low-cost shaft member for hydrodynamic bearing apparatuses restores the pressure balance in a thrust bearing gap formed on both axial sides of the flange portion in an early stage. A shaft material integrally having a shaft portion and a flange portion with a through-hole between both end faces of the flange portion is formed in a common forging step. As a result, the through-hole is formed to open to an inner diameter side of the bearing gaps avoiding the thrust bearing gaps formed on both end faces of the flange portion of the shaft member as a finished product.