Patents by Inventor Takahiro Kitsukawa

Takahiro Kitsukawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Drilling tool
    Patent number: 8388279
    Abstract: There is provided a drilling tool having a substantially columnar tool body to be rotated around an axial line, a cutting edge located at a front end portion of the tool body, and a chip suction hole which is formed inside the tool body in a direction of the axial line for sucking chips generated by the cutting edge. The chip suction hole has a main hole portion extending toward a drill base along the axial line, a narrow hole portion located at a front end of the main hole portion, the narrow hole portion having a cross section smaller than that of the main hole portion and a suction opening located at a front end of the narrow hole portion and opened in the vicinity of the cutting edge, the suction opening having a cross section larger than that of the narrow hole portion.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: March 5, 2013
    Assignee: Tungaloy, Corporation
    Inventor: Takahiro Kitsukawa
  • Drilling Tool
    Publication number: 20100003097
    Abstract: There is provided a drilling tool having a substantially columnar tool body to be rotated around an axial line, a cutting edge located at a front end portion of the tool body, and a chip suction hole which is formed inside the tool body in a direction of the axial line for sucking chips generated by the cutting edge. The chip suction hole has a main hole portion extending toward a drill base along the axial line, a narrow hole portion located at a front end of the main hole portion, the narrow hole portion having a cross section smaller than that of the main hole portion and a suction opening located at a front end of the narrow hole portion and opened in the vicinity of the cutting edge, the suction opening having a cross section larger than that of the narrow hole portion.
    Type: Application
    Filed: June 30, 2009
    Publication date: January 7, 2010
    Applicant: Tungaloy Corporation
    Inventor: Takahiro Kitsukawa