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. 02, 2005
Filed:
Mar. 19, 2003
Masahiro Taguchi, Osaka, JP;
Yusaku Yamamoto, Osaka, JP;
Eisaku Nakai, Osaka, JP;
Nikken Kosakusho Works Ltd., Osaka-Fu, JP;
Abstract
In order to provide a tool holder which greatly reduces frictional resistance between a locknut and a taper collet, and eliminates a twisting of the taper collet during tightening of the locknut, in a tool holder comprising a locknutwhich pushes a taper colletinto a tapered holeof a collet chuck bodyto chuck a cutting tool, between a reference endof the tape colletand a collet supporting portionopposed thereto, interposed is a bearing washerto reduce frictional resistance between both contact surfaces. To both surfaces of this bearing washer, namely, to the respective surfaces which come into contact with the reference endand collet supporting portion, surface treatment by any of ion nitriding, DLC (Diamond-Like Carbon) coating, and TiN coating is applied.