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:
Sep. 22, 1998
Filed:
Mar. 07, 1997
Hitachi Powdered Metals Co., Ltd., Chiba, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A hydrodynamic thrust porous bearing having excellent sliding characteristics under the use conditions of not only radial load but also thrust load, which bearing is approximately cylindrical in configuration and receives thrust load on its axial end face and is characterized in that the bearing includes protruded portions disposed radially relative to its center, tapered portions formed on at least one side of the protruded portions, and depressed portions defined by the bottom part of the tapered portions in at least three positions in the thrust receiving axial end face, and the bearing further includes grooves in the inner peripheral surface at the positions corresponding to the depressed portions.