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:
Nov. 30, 1993
Filed:
Nov. 08, 1991
Applicant:
Inventors:
Yuji Nishimura, Odawara, JP;
Tsuyoshi Takahashi, Odawara, JP;
Masahiko Sega, Hiratsuka, JP;
Jyousei Shimizu, Odawara, JP;
Tomio Suzuki, Hiratsuka, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360106 ; 310 13 ;
Abstract
In a voice coil motor having a voice coil, and a magnetic circuit which generates a magnetic flux traversing the voice coil; the magnetic circuit includes a yoke which is divided so as to form a plurality of magnetic paths traversing the voice coil and which is provided with hollows, and adjustment members which are inserted into the hollows so as to adjust the magnetic fluxes of the magnetic paths independently of one another.