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. 28, 2026
Filed:
Nov. 29, 2021
Sumitomo Electric Hardmetal Corp., Hyogo, JP;
Hirotsugu Iwasaki, Hyogo, JP;
Akihiko Ueda, Hyogo, JP;
Naoki Watanobe, Hyogo, JP;
Takashi Harada, Hyogo, JP;
Satoru Kukino, Hyogo, JP;
SUMITOMO ELECTRIC HARDMETAL CORP., Hyogo, JP;
Abstract
A cutting tool includes a rake face, a flank face, and a cutting edge ridge line connecting the rake face and the flank face. A portion of the rake face and a portion of the flank face adjacent to the cutting edge ridge line are made of a diamond sintered body including diamond grains. A dislocation density in the portion of the flank face is 8×10/mor less. The diamond grains have an average grain size of 0.1 μm to 50 μm. A content ratio of the diamond grains in the diamond sintered body is 80% by volume to 99% by volume.