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. 09, 1992
Filed:
Sep. 18, 1990
Hisaya Nakagawa, Komagane, JP;
Sankyo Seiki Mfg. Co., Ltd., Nagano, JP;
Abstract
An oil impregnated sintered bearing suitably used for a spindle motor, which rotatably supports a shaft in a longitudinal opening of the bearing for supporting the motor shaft. The longitudinal opening is formed by at least three inwardly projecting surfaces defining a portion of the longitudinal opening and being arranged symmetrically with respect to a central longitudinal axis of the opening. The surfaces are almost tangential to a motor shaft disposed in the opening such that the surfaces have a clearance relative to the shaft which is smaller than that of other inner peripheral portions defining the opening. A wedge-like clearance is formed between the shaft and a side of the projecting surfaces toward which the shaft rotates.