Patents by Inventor Suguru MAEMURA

Suguru MAEMURA 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).

  • Tool holder
    Patent number: 9333561
    Abstract: In a shank portion of an end mill which is chucked by a tool holder, flat surfaces are formed at a plurality of circumferential positions in the outer periphery of the shank portion so that the flat surfaces abut on side lock bolts attached to a body of the tool holder.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: May 10, 2016
    Assignee: NIKKEN KOSAKUSHO WORKS, LTD.
    Inventors: Eisaku Nakai, Suguru Maemura, Susumu Mikado, Steve Eckersall
  • End mill and shank structure of end mill
    Patent number: 9238269
    Abstract: In a shank portion of an end mill which is chucked by a tool holder, flat surfaces are formed at a plurality of circumferential positions in the outer periphery of the shank portion so that the flat surfaces abut on side lock bolts attached to a body of the tool holder.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: January 19, 2016
    Assignee: NIKKEN KOSAKUSHO WORKS, LTD.
    Inventors: Eisaku Nakai, Suguru Maemura, Susumu Mikado, Steve Eckersall
  • Shank Structure of End Mill and Tool Holder
    Publication number: 20150054233
    Abstract: In a shank portion of an end mill which is chucked by a tool holder, flat surfaces are formed at a plurality of circumferential positions in the outer periphery of the shank portion so that the flat surfaces abut on side lock bolts attached to a body of the tool holder.
    Type: Application
    Filed: October 30, 2014
    Publication date: February 26, 2015
    Inventors: Eisaku NAKAI, Suguru MAEMURA, Susumu MIKADO, Steve ECKERSALL
  • Tool holder and method for assembling the same
    Patent number: 8714893
    Abstract: A tool holder includes a drawing screw and a stopper member. The drawing screw is positioned in an intermediate hole. A rear end face of a head of the drawing screw faces a boundary wall surface, and a top end of a shaft of the drawing screw is screwed in a rear end of a collet. The stopper member is positioned in an annular space between an outer peripheral surface of the shaft of the drawing screw and an inner peripheral surface of the intermediate hole. The stopper member faces a front end face of the head of the drawing screw, and limits movement of the head toward a top end of the tool holder. The drawing screw and the stopper member are inserted and assembled from a top end opening of a collet holding hole.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: May 6, 2014
    Assignee: Nikken Kosakusho Works, Ltd.
    Inventors: Masahiro Taguchi, Eisaku Nakai, Suguru Maemura
  • Shank Structure of End Mill and Tool Holder
    Publication number: 20130322980
    Abstract: In a shank portion of an end mill which is chucked by a tool holder, flat surfaces are formed at a plurality of circumferential positions in the outer periphery of the shank portion so that the flat surfaces abut on side lock bolts attached to a body of the tool holder.
    Type: Application
    Filed: October 23, 2012
    Publication date: December 5, 2013
    Applicant: NIKKEN KOSAKUSHO WORKS, LTD.
    Inventors: Eisaku NAKAI, Suguru MAEMURA, Susumu MIKADO, Steve ECKERSALL
  • Tool Holder
    Publication number: 20130069322
    Abstract: A tool holder, which is inserted into a center-through-coolant spindle and employs a side-lock type chuck structure, can reliably prevent leakage of cutting liquid from a bolt hole for a side-lock bolt. The tool holder includes a side-lock bolt and an annular seal member. The side-lock bolt is inserted into a through hole extending from an outer peripheral surface to an inner peripheral surface of a tool attachment portion, threadedly engaged with an internal thread formed in the through hole, and secures a shank of a tool to a tool-holding bore. The seal member seals between the through hole and side-lock bolt.
    Type: Application
    Filed: December 12, 2011
    Publication date: March 21, 2013
    Applicant: NIKKEN KOSAKUSHO WORKS, LTD.
    Inventors: Eisaku NAKAI, Suguru MAEMURA, Susumu MIKADO
  • Tool Holder and Method for Assembling the Same
    Publication number: 20110129313
    Abstract: A tool holder includes a drawing screw and a stopper member. The drawing screw is positioned in an intermediate hole. A rear end face of a head of the drawing screw faces a boundary wall surface, and a top end of a shaft of the drawing screw is screwed in a rear end of a collet. The stopper member is positioned in an annular space between an outer peripheral surface of the shaft of the drawing screw and an inner peripheral surface of the intermediate hole. The stopper member faces a front end face of the head of the drawing screw, and limits movement of the head toward a top end of the tool holder. The drawing screw and the stopper member are inserted and assembled from a top end opening of a collet holding hole.
    Type: Application
    Filed: May 25, 2010
    Publication date: June 2, 2011
    Applicant: NIKKEN KOSAKUSHO WORKS, LTD.
    Inventors: Masahiro TAGUCHI, Eisaku NAKAI, Suguru MAEMURA