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:
Aug. 10, 2004
Filed:
Mar. 06, 2003
Shigeyuki Takahashi, Kodaira, JP;
Takanori Nanya, Sayama, JP;
Takayasu Machida, Iruma, JP;
Kazuo Suzuki, Tokorozawa, JP;
Takeaki Shimanouchi, Hanno, JP;
Citizen Watch Co., Ltd, Tokyo, JP;
Abstract
A stator ( ) is made up by bonding a first stator part ( ) made of a high-permeability material to a second stator part ( ) made of a high-permeability material respectively by welding through the intermediary of connections ( ) made of a low-permeability material or a nonmagnetic material, interposed therebetween. Paired recesses ( ) serving as holding torque setting means for holding a rotor ( ) by a magnetic action are formed on the inner periphery of a rotor hole ( ) defined inside the stator ( ) at the position forming an initial phase angle (&thgr; ). A field coil ( ) for excitation is magnetically bonded to opposite ends of the stator ( ), thereby forming a two-pole step motor for a timepiece.