Invention Grant
- Patent Title: Drilling tip and drilling tool
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Application No.: US17631910Application Date: 2020-01-17
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Publication No.: US11976518B2Publication Date: 2024-05-07
- Inventor: Kazuyoshi Nakamura , Hiroki Takatsuki
- Applicant: MMC RYOTEC CORPORATION
- Applicant Address: JP Anpachi-gun
- Assignee: MMC RYOTEC CORPORATION
- Current Assignee: MMC RYOTEC CORPORATION
- Current Assignee Address: JP Anpachi-gun
- Agency: Locke Lord LLP
- Priority: JP 19145480 2019.08.07
- International Application: PCT/JP2020/001422 2020.01.17
- International Announcement: WO2021/024512A 2021.02.11
- Date entered country: 2022-02-01
- Main IPC: E21B10/56
- IPC: E21B10/56 ; E21B10/43

Abstract:
A drilling tip that is attached to a distal end surface of a tool main body of a drilling tool which is rotated around an axis and in which a striking force is applied to a distal end side in a direction of the axis. The drilling tip includes a tip main body in which a base end portion having a columnar shape and a distal end portion protruding from this base end portion to the distal end side are integrally formed. The distal end portion includes a curved convex surface-shaped portion protruding to the distal end side of the tip main body, and a projection portion protruding to the distal end side from a surface of the curved convex surface-shaped portion.
Public/Granted literature
- US20220290502A1 DRILLING TIP AND DRILLING TOOL Public/Granted day:2022-09-15
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