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:
Feb. 24, 2015
Filed:
Nov. 28, 2012
Union Tool Co., Shinagawa, Tokyo, JP;
Shoichi Takahashi, Shinagawa-ku, JP;
Masanori Kakuda, Shinagawa-ku, JP;
Union Tool Co., Tokyo, JP;
Abstract
To provide a rotary cutting tool in which a satisfactory cut state in which burrs and uncut portions are absent is obtained, even when counterboring is applied to a composite honeycomb member. A first cutting-chip discharge groove () disposed from a tool tip towards a base-end side is formed on an outer periphery of a tool body (); a plurality of second cutting-chip discharge grooves (), provided along a spiral disposed from the tool tip towards the base-end side so as to intersect with the first cutting-chip discharge groove (), are formed on an outer periphery section of the tool body () where the first cutting-chip discharge groove () is absent; and a base-end-side outer periphery cutting edge () is formed on an intersection ridge between a rake face of a second cutting-chip discharge groove (), which faces a direction of tool rotation, and an outer peripheral surface of the tool body () or an outer peripheral relief face; wherein an end cutting edge () is provided at a tip section of the tool body (); a tip-side outer periphery cutting edge () is formed on an intersection ridge between the rake face at a tip section of a first cutting-chip discharge groove () and an outer peripheral surface of the tip section of the tool body () or an outer periphery relief face (); and the base-end-side outer periphery cutting edge () is provided further towards the tool base-end side than the tip-side outer periphery cutting edge ().