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:
Apr. 25, 2023
Tungaloy Corporation, Fukushima, JP;
Hiroya Shikama, Iwaki, JP;
TUNGALOY CORPORATION, Fukushima, JP;
Abstract
A drill body supplies a cutting fluid while securing stiffness of a leading end part. A body extends from a base end toward a leading end; a discharge groove to discharge chips; a fluid hole having a part which passes through an inside, of the body, of an inter-groove solid part of the discharge groove and causes a fluid to flow from the base end toward the leading end; and a mounting part in the leading end for mounting a cutting edge. The mounting part has a recessed part along the central axis of the body, and a cross section of the fluid hole changes from a circular shape to a non-circular shape midway along a path of the fluid hole from the base end toward the leading end, and assumes another non-circular shape in a portion which passes a side part of the recessed part.