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:
Jul. 14, 2015
Filed:
Aug. 20, 2009
Wolfgang Bierl, Gueglingen, DE;
Bastian Hilty, Dulliken, CH;
Wolfgang Bierl, Gueglingen, DE;
Bastian Hilty, Dulliken, CH;
KOMET GROUP GMBH, Besigheim, DE;
Abstract
A shaft tool for machine tools, has a shaft, a tool head disposed at a shaft end and equipped with at least one cutting element, and a coupling element disposed at the other shaft end for direct or indirect connection to a machine spindle. A peripheral groove extends along the circumference of the shaft and is open radially, and at least one spreading element engages in the peripheral groove and can be radially adjusted therein, resulting in the exertion of spreading and bending forced onto the groove flanks. The peripheral groove is filled with a filler material at least in the area of the spreading element, the filler material having both a sealing function against contaminants and a damping function. The filler material also acts as a rotation prevention for the spreading elements.