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, 2007
Filed:
May. 20, 2003
Tsuneo Maruyama, Niigata, JP;
Junichi Iguchi, Niigata, JP;
Kenji Nishio, Kosai, JP;
Tooru Itoh, Kosai, JP;
Takeshi Tanaka, Kosai, JP;
Tsuneo Maruyama, Niigata, JP;
Junichi Iguchi, Niigata, JP;
Kenji Nishio, Kosai, JP;
Tooru Itoh, Kosai, JP;
Takeshi Tanaka, Kosai, JP;
Mitsubishi Materials PMG Corporation, Tokyo, JP;
ASMO Co., Ltd., Kosai-shi, JP;
Abstract
The present invention is for providing an oil-impregnant sintered bearing, which can reliably preserve an oil film on a sliding face, and a method for manufacturing the oil-impregnant sintered bearing. An oil-impregnant sintered bearing is made by providing an internal diameter, which a rotating axis member is inserted through, in a bearing main body, formed by a porous sintered alloy having internal pores therein, and providing a sliding face in one region of the inner peripheral face of the internal diameter, the sliding face being obtained by closing the pores which have been opened in the inner peripheral face. The density in a section preserving oil pressure, which extends from the sliding face of the bearing main body toward the outer side of the diameter, is made higher than the density in other sections of the bearing main body.