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. 04, 2008
Filed:
Sep. 14, 2005
Kazumi Ogawa, Toyota, JP;
Kazumi Ogawa, Toyota, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, Aichi, JP;
Abstract
In a valve timing controlling apparatus having: a first rotary body rotatable with a cam shaft of an internal combustion engine; a second rotary body rotatable with a crank shaft and rotatable relative to the first rotary body; a controlling means for varying relative rotational phase between the first rotary body and the second rotary body; and a torsion coil spring for urging the first rotary body relative to the second rotary body in a phase advancing direction. The coil portionof the torsional coil springincludes a pair of holding areasextending continuously from the respective retaining portions and capable of fixing the coil portion in position relative to the first rotary bodyand the second rotary bodyand includes also a torque generating areadisposed between the pair of holding area. The holding areas and the torque generating area have different coiling diameters.