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. 08, 2006
Filed:
Sep. 01, 2005
Takahiro Sanada, Kashihara, JP;
Masayuki Yamamoto, Kasugai, JP;
Takahiro Sanada, Kashihara, JP;
Masayuki Yamamoto, Kasugai, JP;
Favess Co., Ltd., Aichi, JP;
Koyo Seiko Co., Ltd., Osaka, JP;
Toyoda Koki Kabushiki Kaisha, Aichi, JP;
Abstract
In a torque sensor, a first detection tube () made from magnetic material covers a cylindrical magnetic leak prevention member () that is made from nonmagnetic material and covers a first shaft () made from magnetic material. Magnetic resistance to magnetic flux, which passes through one end of the first detection tube () and one end of a second detection tube () that is made from magnetic material and rotates together with a second shaft (), changes according to elastic relative rotation of the two shafts () corresponding to transmitted torque, by providing a plurality of teeth () along the circumferential direction at the one end of each detection tube (). The first shaft () and the first detection tube () are integrated with the magnetic leak prevention member () so that they can rotate together, by being inserted in a mold for forming the magnetic leak prevention member () before the synthetic resin material is poured into the mold. The circumferential width of each resin holding space (A) between the teeth () arranged along the circumferential direction at one end of the first detection tube () decreases gradually toward the other end of the first detection tube (). The synthetic resin material solidified in the resin holding spaces (A) is pressed against the teeth () due to shrinkage thereof.