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. 15, 2008
Filed:
Sep. 29, 2003
Thomas J. Long, Ii, Greensburg, PA (US);
Karen A. Craig, Greensburg, PA (US);
Ronald L. Dudzinsky, Derry, PA (US);
Ruy Frota DE Souza, Filho, Latrobe, PA (US);
Nicholas M. Gaten, Greensburg, PA (US);
Thomas J. Long, II, Greensburg, PA (US);
Karen A. Craig, Greensburg, PA (US);
Ronald L. Dudzinsky, Derry, PA (US);
Ruy Frota de Souza, Filho, Latrobe, PA (US);
Nicholas M. Gaten, Greensburg, PA (US);
Kennametal Inc., Latrobe, PA (US);
Abstract
A rotary cutting tool such as a helical end mill, having pockets arranged to overcome harmonic vibrations. The tool has at least two and in one embodiment all three of three spacing irregularities. In the first irregularity, columns of pockets, typically associated with flutes, are staggered circumferentially out of even spacing. In a preferred embodiment having three flutes, the flutes are mostly not centered on one hundred twenty degree intervals. In the second irregularity, at least some pockets are arranged at different radial rake angles. In the third irregularity, at least some pockets are arranged at different axial rake angles.