Patents Assigned to MMC RYOTEC CORPORATION
  • Patent number: 11976518
    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.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: May 7, 2024
    Assignee: MMC RYOTEC CORPORATION
    Inventors: Kazuyoshi Nakamura, Hiroki Takatsuki
  • Publication number: 20230392448
    Abstract: This drilling bit includes a bit body centered on a tool central axis, a plurality of buttons protruding from a tip surface of the bit body, a discharge flow path disposed from the tip surface of the bit body over an outer peripheral surface, and a blow hole that extends inside the bit body and is open at the tip surface. The discharge flow path has a first flow path which has a groove shape located on the tip surface and extending in a tool radial direction, and at which the blow hole is open, and a second flow path located outward in the tool radial direction from the blow hole on the tip surface to communicate with the first flow path, and extending in a tool circumferential direction.
    Type: Application
    Filed: October 19, 2021
    Publication date: December 7, 2023
    Applicant: MMC RYOTEC CORPORATION
    Inventors: Hiroshi Ota, Taiyo Matsuse, Satoshi Ioka, Thanakrit DEATJIRAKARJORNSAKUN
  • Publication number: 20220290502
    Abstract: Deterioration in boring efficiency is curbed and the costs of repolishing are reduced by curbing wear-width progression of a distal end portion of a tip main body of a drilling tip. 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 (1) in which a base end portion (2) having a columnar shape and a distal end portion (3) protruding from this base end portion (2) to the distal end side are integrally formed.
    Type: Application
    Filed: January 17, 2020
    Publication date: September 15, 2022
    Applicant: MMC RYOTEC CORPORATION
    Inventors: Kazuyoshi Nakamura, Hiroki Takatsuki