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:
May. 09, 2000
Filed:
May. 05, 1998
Yuzuru Suzuki, Asaba-cho, JP;
Sakae Fujitani, Asaba-cho, JP;
Hiroto Nakamata, Asaba-cho, JP;
Haruyoshi Hino, Asaba-cho, JP;
Minebea Co., Ltd., Nagano, JP;
Abstract
A claw pole type synchronous motor has two cylindrical stator assembles arranged back-to-back and a magnetized rotor provided coaxially with the stator assemblies. The rotor has a length larger than the total thickness of the stator assemblies and always covers the inner peripheral surfaces of the stator assemblies so as to reduce vibration due to axial movements of the rotor with respect to the stator assemblies. The motor also has an electrical phase angle defined between the center lines of the corresponding claw poles of the adjacent stator assemblies made equal to the theoretical electrical phase angle minus an electrical angel within a range more than 0.degree. and less than 10.degree..