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:
Dec. 30, 2025
Filed:
Mar. 08, 2021
Sumitomo Electric Hardmetal Corp., Itami, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Masashi Yamada, Itami, JP;
Naoyuki Wakatsuki, Toyota, JP;
Yasumasa Sunano, Toyota, JP;
Takayuki Natori, Toyota, JP;
Riku Tadokoro, Toyota, JP;
Sumitomo Electric Hardmetal Corp., Itami, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
The outer peripheral surface is provided with a first margin contiguous to each of the cutting edge and the flank face, and a second margin that is located on the rear side with respect to the first margin in a rotation direction and that is separated from each of the flank face and the thinning face. An outer peripheral portion of the first margin and an outer peripheral portion of the second margin have respective back tapers having the same angle. In a direction parallel to the axial line, a distance between a front end of the first margin and a front end of the second margin is more than or equal to 3 mm and less than or equal to 5 mm.