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:
May. 30, 2023
Filed:
Mar. 10, 2020
Sumitomo Electric Hardmetal Corp., Itami, JP;
Sumitomo Electric Tool Net, Inc., Osaka, JP;
Masashi Yamada, Itami, JP;
Masaaki Jindai, Itami, JP;
Jun Okamoto, Osaka, JP;
Futoshi Takeshita, Osaka, JP;
Kyosuke Kai, Kashiba, JP;
Katsutoshi Fukuda, Kashiba, JP;
SUMITOMO ELECTRIC HARDMETAL CORP., Itami, JP;
Sumitomo Electric Tool Net, Inc., Osaka, JP;
Abstract
A reamer is rotated about a central axis and has, in a direction along a central axis, a tool front end and a tool rear end that is an end opposite to the tool front end. The reamer includes a blade on a tool front end side. The blade has, on a circumferential surface, a chamfered cutting edge located on the tool front end side, a circumferential cutting edge contiguous to an end of the chamfered cutting edge on a tool rear end side, and a margin that is a surface contiguous to the circumferential cutting edge. The circumferential cutting edge includes a front end portion between a first position and a second position, the first position being an end on a chamfered cutting edge side, the second position having a distance of 1 mm from the first position in a direction of extension of the circumferential cutting edge.