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:
Mar. 31, 2009
Filed:
Apr. 19, 2006
Naoto Sesita, Kawasaki, JP;
Katuyuki Tanaka, Kawasaki, JP;
Yusuke Mizukoshi, Kawasaki, JP;
Hiroyuki Kurihara, Fujisawa, JP;
Yoshihisa Watanabe, Yokohama, JP;
Hiroshi Sato, Nirasaki, JP;
Naoto Sesita, Kawasaki, JP;
Katuyuki Tanaka, Kawasaki, JP;
Yusuke Mizukoshi, Kawasaki, JP;
Hiroyuki Kurihara, Fujisawa, JP;
Yoshihisa Watanabe, Yokohama, JP;
Hiroshi Sato, Nirasaki, JP;
Igarashi Electric Works Ltd., Kawasake-shi, JP;
Mitsui Mining and Smelting Co., Ltd., Tokyo, JP;
Abstract
A motor comprises a yoke as casing, a shaft extending along a center of the yoke, an annular stator fixed to the yoke and an armature fixed to the shaft to rotate with the shaft inside the stator. The armature comprises a plurality of teeth on the outer circumferential surface. A wire is wound on any of the teeth to form a normal coil. Another wire is wound on another of the teeth to form a brake coil that is a short circuit. When the motor rotates much faster, the brake coil produces magnetic flux which acts as load against the rotation of the motor to allow the motor to rotate slower.