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:
Apr. 29, 2008
Filed:
Sep. 28, 2006
Atushi Iiduka, Kyoto, JP;
Kunio Shimauchi, Kyoto, JP;
Nobuyuki Yoshikuwa, Kyoto, JP;
Shimadzu Corporation, Kyoto-Fu, JP;
Abstract
Disclosed is an electromagnetic-force-balancing-type electronic balance having a magnetic circuit which includes a yoke, a first permanent magnet, a pole piece, a second permanent magnetand a cover. A connection membermade of a magnetic material is disposed in an air-gap region included in the magnetic circuit. The connection membermay be disposed between the second permanent magnetand the coveror between the coverand the yoketo facilitate assembling operations. Alternatively, first and second gap-defining membersmade of a non-magnetic material may be disposed, respectively, between the first permanent magnetand the yokeand between the second permanent magnetand the cover, to provide symmetric properties in magnetic sub-circuits so as to counteract an imbalance in hysteresis characteristic. The present invention can suppress adverse influences of a magnetic resistance caused by an air gap existing in the magnetic circuit of the electronic balance.