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. 08, 2001
Filed:
Nov. 05, 1997
Applicant:
Inventors:
Takashi Ishida, Narashino, JP;
Shigeru Ooki, Narashino, JP;
Assignee:
Seiko Seiki Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 3/300 ; H02K 3/500 ;
U.S. Cl.
CPC ...
H02K 3/300 ; H02K 3/500 ;
Abstract
To provide a reciprocation motor capable to detect rotation angle of rotor accurately. Rotor,is a magnet having two poles to radial direction and comprises half-cylindrical magnets. Driving coils,and,are bound equally at coil board,Magnetic sensor,is fixed at outside and under side of driving coil,on coil board,Such a construction makes magnetic sensor hard to be influenced by flux generating caused by current flowing through driving coil,Therefore, it is possible to improve position detecting accuracy of rotor