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. 26, 2008
Filed:
Apr. 04, 2006
Osamu Ochiai, Kanagawa, JP;
Yuji Nagai, Kanagawa, JP;
Masayuki Shibata, Tokyo, JP;
Hideo Maejima, Kanagawa, JP;
Osamu Ochiai, Kanagawa, JP;
Yuji Nagai, Kanagawa, JP;
Masayuki Shibata, Tokyo, JP;
Hideo Maejima, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A magnetic scale is disclosed wherein a magnetic member is protected with certainty to effectively enhance the durability. The magnetic scale includes a magnetic member provided between outside and inside pipe members and has magnetic graduations magnetized alternately with the N and S poles along the extending direction thereof. When the magnetic member and the inside pipe member are assembled in the outside pipe member, the inside pipe member contacts partly with an inner face of the outside pipe member and partly with a back face of the magnetic member in such a manner as to cover the overall back face. The outer face of the inside pipe member presses the back face of the magnetic member over the overall length so that the close contact face of the magnetic member is closely contacted with the inner face of the outside pipe member.