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:
Jun. 22, 2021
Filed:
Sep. 13, 2019
Sumitomo Electric Hardmetal Corp., Itami, JP;
Big Daishowa Seiki Co., Ltd., Higashiosaka, JP;
Naoki Matsuda, Itami, JP;
Hideo Maeno, Itami, JP;
Chikara Kimura, Itami, JP;
Yoshihiro Kuroda, Itami, JP;
Takafumi Takami, Higashiosaka, JP;
Junichi Koyama, Higashiosaka, JP;
Masahiro Sasano, Higashiosaka, JP;
SUMITOMO ELECTRIC HARDMETAL CORP., Itami, JP;
BIG DAISHOWA SEIKI CO., LTD., Higashiosaka, JP;
Abstract
A cutting insert has a seating surface, an outer peripheral surface, a top surface, and an attachment hole. The cutting edge includes a curved cutting corner edge portion, a first cutting edge portion, and a second cutting edge portion. The top surface includes a first rake face contiguous to the first cutting edge portion, a second rake face contiguous to the second cutting edge portion, and a third rake face contiguous to the cutting corner edge portion and also contiguous to the first and second rake faces. The third rake face has a first region contiguous to the first rake face and a second region contiguous to the second rake face. The first rake face and the first region each have a rake angle which is a positive angle. The second rake face and the second region each have a rake angle which is a negative angle.