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:
Jun. 13, 2006
Filed:
Aug. 06, 2001
Kazuo Okamura, Mie-ken, JP;
Yasuhiro Yamamoto, Kuwana, JP;
Isao Komori, Kuwana, JP;
Natsuhiko Mori, Mie-ken, JP;
Makoto Shiranami, Inazawa, JP;
Kazuo Okamura, Mie-ken, JP;
Yasuhiro Yamamoto, Kuwana, JP;
Isao Komori, Kuwana, JP;
Natsuhiko Mori, Mie-ken, JP;
Makoto Shiranami, Inazawa, JP;
NTN Corporation, Osaka, JP;
Abstract
The porous oil-impregnated bearingcomprises a bearing bodymade of a porous material, and oil retained in the pores of the bearing bodyby impregnation with lubricating oil or lubricating grease. The inner peripheral surface of the bearing bodyis formed with a bearing surfaceopposed to an outer peripheral surface of a shaft to be supported, with a bearing clearance defined therebetween. The bearing surfacehas a first region min which a plurality of hydrodynamic pressure generating groovesinclined in one direction with respect to the axial direction are circumferentially disposed, a second region mwhich is axially spaced from said first region mand in which a plurality of hydrodynamic pressure generating groovesinclined in the other direction with respect to the axial direction are circumferentially disposed, and an annular smooth region n disposed between the first and second regions mand m