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:
Apr. 11, 1989
Filed:
Feb. 26, 1988
Toshinori Hijiya, Tokyo, JP;
Katumi Saitou, Tokyo, JP;
Copal Company Limited, Tokyo, JP;
Abstract
A dynamic pressure-type fluid bearing usable in a polygon mirror scanner for a laser beam printer includes a sleeve having an inner peripheral surface and a bottom face, and a journal having an outer peripheral surface cooperating with the inner peripheral surface of the sleeve across a predetermined clearance, and an end face cooperating with the bottom face of the sleeve. In an embodiment, the sleeve is rotatable relative to the journal and is held by a magnetic retaining force in such a manner that a predetermined gap is formed between the bottom face of the sleeve and the end face of the journal even when the bearing is at rest. The bottom face of the sleeve includes a porous body so that the gap between the bottom face and end is communicated with the outside of the bearing.