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:
Nov. 06, 2018
Filed:
Jun. 20, 2014
Sumitomo Electric Hardmetal Corp., Itami-shi, JP;
Shinya Ikenaga, Itami, JP;
Yosuke Shimamoto, Itami, JP;
Tomoyuki Fukuyama, Sorachi-gun, JP;
Junya Okida, Itami, JP;
Masanobu Ueda, Itami, JP;
SUMITOMO ELECTRIC HARDMETAL CORP., Itami-shi, JP;
Abstract
A cutting insert includes a leading cutting edge having a rake angle in the range of 20° to 35° in a central region in a width direction; and a rake face having a breaker groove formed in the central region in the width direction and land portions formed in both end regions in the width direction. The land portions have a rake angle smaller than the rake angle in the central region in the width direction. The breaker groove includes opposing side faces separated from each other by a distance that decreases with increasing distance from the leading cutting edge and four shoulder portions of the same height that are formed on the opposing side faces at positions above the land portions, two of the shoulder portions being closer to the leading cutting edge and to outer sides in the width direction than the other two shoulder portions are.