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:
Sep. 22, 2026
Filed:
Nov. 17, 2023
Tungaloy Corporation, Fukushima, JP;
Hiroya Shikama, Iwaki, JP;
TUNGALOY CORPORATION, Fukushima, JP;
Abstract
It is possible to reduce shoulder parts from being damaged while suppressing an increase in cutting resistance or abrasion of edges at a time of machining. A drilling tool for drilling machining includes: at least one major cutting edge; second cutting edges that are provided on an outer side of a tool radial direction of the major cutting edge; third cutting edges that are provided on the outer side of the tool radial direction of the second cutting edges; a first honing portion that is formed at the major cutting edge; second honing portions that are formed at the second cutting edges; and third honing portions that are formed at the third cutting edges. Honing sizes of the third honing portions are larger than a honing size of the first honing portion.