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. 09, 2026
Filed:
May. 10, 2021
Osg Corporation, Toyokawa, JP;
Hiroyasu Makino, Toyokawa, JP;
Yukimasa Takagishi, Toyokawa, JP;
OSG CORPORATION, Toyokawa, JP;
Abstract
A drill () is provided with a thinning edge (), a gash portion (), a coolant passage, and an oil hole (). The thinning edge () is provided at a leading end portion of a body (), and extends toward a chisel portion () from an inner end () of a cutting edge (). A ridge line between the gash portion () and the flank () extends in a circular arc shape from an inner end of the thinning edge () toward an outer peripheral surface () of the body (). The coolant passage is provided inside a shank and the body (), and extends from a rear end portion of the shank toward the leading end portion of the body (). The oil hole () is provided at a gash face () of the gash portion () and is an outlet of the coolant passage.