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. 04, 2002
Filed:
Mar. 31, 2000
Takafumi Suzuki, Chiba, JP;
Hiromitsu Goto, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A motor has a support member, a bearing member mounted in a hollow space of the support member for undergoing rotation, a rotor member having a shaft portion disposed in a hollow space of the bearing member for rotation therewith, at least one magnet connected to one of the support member and the rotor member, and electromagnets connected to the other of the support member and the rotor member and in confronting relation to the magnet for generating a rotational magnetic field that coacts with the magnet to rotate the rotor member. At least one of an inner peripheral surface of the bearing member and an outer peripheral surface of the shaft portion of the rotor member has contact portions disposed in contact with the other of the inner peripheral surface and the outer peripheral surface to form lubricating gaps each disposed between an adjacent pair of contact portions and between the inner and outer peripheral surfaces.