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:
Jul. 09, 1996
Filed:
Oct. 11, 1994
Hiroshi Makino, Ebina, JP;
Teiji Sata, Ebina, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
Disclosed is the improvement in a dynamic air pressure bearing in which a rotor is supported at high speed in the non-contact state. In an optical deflector, a stationary shaft is planted at the center portion of a housing. A stator core is disposed on a stud. A magnet yoke is integrated with a sleeve rotated relative to the stationary shaft. The magnet yoke contains an inner magnet and an outer magnet. A rotary polygonal mirror is mounted on a flange fixed on the sleeve by means of a center screw and a mirror cap. The rotary polygonal mirror is rotated at high speed together with the sleeve relative to the stationary shaft, thus constituting a dynamic air pressure bearing between the shaft and the sleeve. The stationary shaft is constituted of a main body and a ring-like bearing member fitted in the main body. The bearing member is formed of a ceramic material and formed with grooves for generating dynamic air pressure. The sleeve is preferably constituted of a main body and a bearing member of ceramic.