Patents by Inventor Kouki Matsubara

Kouki Matsubara 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).

  • Patent number: 10807173
    Abstract: A second distance is longer than a first distance and a value obtained by dividing the third distance by the fourth distance is more than or equal to 0.5 and less than or equal to 0.8 when it is assumed that the first distance represents a distance between the cutting edge and the mounting surface in a direction perpendicular to the rake face, the second distance represents a distance between the mounting surface and a boundary portion between the rising portion and the flat portion in the direction perpendicular to the rake face, the third distance represents a distance between the boundary portion and a tip of the cutting edge in a direction parallel to the rake face, and the fourth distance represents a distance between the second discharging opening portion and the tip of the cutting edge in the direction parallel to the rake face.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: October 20, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Keiji Kinoshita, Kouki Matsubara, Yusuke Koike
  • Patent number: 10766077
    Abstract: The holder has a first surface and a second surface. The head includes a cutting edge portion and a shank portion. The holder is provided with a first hole and a second hole communicating with the first hole, the first hole extending in a third direction inclined by a second angle relative to a second direction extending from the second surface toward the first surface when viewed in a direction parallel to the axis line. The shank portion has a flat surface portion, and is provided inside the second hole. The fastening portion is provided inside the first hole, and is in contact with the flat surface portion. In a plane perpendicular to the axis line, a third angle between the second direction and a fourth direction perpendicular to the flat surface portion is larger than the second angle. The third angle is less than 90°.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: September 8, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Yoshikatsu Mori, Kouki Matsubara, Ryusei Hamada, Masaaki Jindai, Kazuhiko Kashima, Yasuhiro Kajiwara
  • Publication number: 20200280525
    Abstract: An allocation method executed by a computer includes dividing each of a plurality of pieces of time-series data into a plurality of segments, allocating a label to each of the pieces of time-series data based on features of each segment in the pieces of time-series data, and allocating a predetermined segment in time-series data, included in the pieces of time-series data, with a label allocated to the time-series data to which the predetermined segment belongs.
    Type: Application
    Filed: February 26, 2020
    Publication date: September 3, 2020
    Inventors: Yasushi SAKURAI, Yasuko MATSUBARA, Yasuaki IRIFUNE, Saeru YAMAMURO, Kouki KAWABATA, Akira URA, TAKASHI KATOH, YUHEI UMEDA
  • Publication number: 20190389515
    Abstract: The support stiffness of a suspension supporting portion can be improved to reduce floor vibration. Arm front-end supporting portions, each supporting a front end portion of a trailing of a rear suspension, are formed on lower portions of rear frames extending in a vehicle longitudinal direction, and each include a squared U-shape portion including outer, inner and front wall portions, with a rear side being open when viewed from the bottom, and an extending outer wall portion extending from the outer wall portion to in front of the front wall portion. The outer wall portion and extending outer wall portion are formed by a side sill inner portion joined to each rear side frame. Also, each arm front-end supporting portion includes an extending inner wall portion extending from the inner wall portion to in front of the front wall portion and joined to each of the rear side frames.
    Type: Application
    Filed: June 21, 2019
    Publication date: December 26, 2019
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Shigeru NAKAUCHI, Masanobu HANAZAKI, Toshio KIMURA, Sho KUROKAWA, Kinya SAKAGUCHI, Kouki SATO, Yosuke YABUMOTO, Hiroshi MATSUBARA, Yohei IZUMI, Kentaro NOMURA
  • Publication number: 20190351493
    Abstract: A second distance is longer than a first distance and a value obtained by dividing the third distance by the fourth distance is more than or equal to 0.5 and less than or equal to 0.8 when it is assumed that the first distance represents a distance between the cutting edge and the mounting surface in a direction perpendicular to the rake face, the second distance represents a distance between the mounting surface and a boundary portion between the rising portion and the flat portion in the direction perpendicular to the rake face, the third distance represents a distance between the boundary portion and a tip of the cutting edge in a direction parallel to the rake face, and the fourth distance represents a distance between the second discharging opening portion and the tip of the cutting edge in the direction parallel to the rake face.
    Type: Application
    Filed: May 15, 2018
    Publication date: November 21, 2019
    Inventors: Keiji Kinoshita, Kouki Matsubara, Yusuke Koike
  • Publication number: 20190232388
    Abstract: The holder has a first surface and a second surface. The head includes a cutting edge portion and a shank portion. The holder is provided with a first hole and a second hole communicating with the first hole, the first hole extending in a third direction inclined by a second angle relative to a second direction extending from the second surface toward the first surface when viewed in a direction parallel to the axis line. The shank portion has a flat surface portion, and is provided inside the second hole. The fastening portion is provided inside the first hole, and is in contact with the flat surface portion. In a plane perpendicular to the axis line, a third angle between the second direction and a fourth direction perpendicular to the flat surface portion is larger than the second angle. The third angle is less than 90°.
    Type: Application
    Filed: February 27, 2017
    Publication date: August 1, 2019
    Applicants: SUMITOMO ELECTRIC HARDMETAL CORP., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Yoshikatsu Mori, Kouki Matsubara, Ryusei Hamada, Masaaki Jindai, Kazuhiko Kashima, Yasuhiro Kajiwara
  • Publication number: 20190126366
    Abstract: A milling tool includes: a body having an outer circumferential surface formed around a central axis; a cutting insert having a rake surface, a flank surface, and a cutting edge formed by a ridgeline of the rake surface and the flank surface; and a screw attaching the cutting insert to the body. The outer circumferential surface has an insert attachment. The insert attachment portion is defined by a first seat surface continuing to the outer circumferential surface and a second seat surface continuing to the first seat surface and having a flat portion provided with a screw hole in which the screw is inserted. The cutting edge is formed of a sintered material containing at least one of cubic boron nitride and polycrystalline diamond. In a cross section perpendicular to the central axis, a first angle formed by a first direction and a second direction is an acute angle.
    Type: Application
    Filed: January 16, 2018
    Publication date: May 2, 2019
    Inventors: Keiji Kinoshita, Kouki Matsubara
  • Patent number: 10213851
    Abstract: A cutting tool including: a tool body (2) provided with an insert support seat (5) including a major seat surface (5a) that supports a bearing surface of a cutting insert, a plurality of seat side surfaces (5b, 5c) that supports side surfaces of the cutting insert at different positions, and a thinned portion (5d) continuous with the major seat surface and the seat side surfaces; and a cutting insert attached to the insert support seat, wherein a ridge at a position where the major seat surface and the thinned portion intersect, a ridge at a position where the seat side surface and the thinned portion intersect, and a ridge at a position where the thinned portions continuous with each other intersect are each formed of a convex arc curved surface.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: February 26, 2019
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Yusuke Koike, Kouki Matsubara, Katsuya Nakakihara, Atsuhiko Maeta
  • Patent number: 10155271
    Abstract: A cutting tool including: a tool body (2) provided with an insert support seat (5) including a major seat surface (5a) that supports a bearing surface of a cutting insert, a plurality of seat side surfaces (5b, 5c) that supports side surfaces of the cutting insert at different positions, and a thinned portion (5d) continuous with the major seat surface and the seat side surfaces; and a cutting insert attached to the insert support seat, wherein a ridge at a position where the major seat surface and the thinned portion intersect, a ridge at a position where the seat side surface and the thinned portion intersect, and a ridge at a position where the thinned portions continuous with each other intersect are each formed of a convex arc curved surface.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: December 18, 2018
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Yusuke Koike, Kouki Matsubara, Katsuya Nakakihara, Atsuhiko Maeta
  • Patent number: 9884377
    Abstract: A cutting insert includes a first surface and a second surface each of which is polygonal and that face away from each other; a side surface that is continuous with the first surface and a side surface that is continuous with the second surface; a cutting edge formed along each of a ridge where the first surface and the side surface intersect and a ridge where the second surface and the side surface intersect; a bearing surface formed in each of a part the first surface and a part of the second surface adjacent to an insert center, the bearing surfaces disposed parallel to each other; and a recessed portion that separates the side surface that is continuous with the first surface from the side surface that is continuous with the second surface. The cutting edge includes three corner edges, a first cutting edge, and a second cutting edge, the first and second cutting edges being continuous with each other and located between each pair of the corner edges.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: February 6, 2018
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Yusuke Koike, Kouki Matsubara, Katsuya Nakakihara, Atsuhiko Maeta
  • Patent number: 9630264
    Abstract: A cutting insert, used for a milling cutter, which includes two polygonal main surfaces that are opposite each other and a plurality of side faces and whose main surfaces are rake faces, whose side faces are flank faces, and whose ridge lines at positions where the main surfaces and the side faces cross each other are used as cutting edges include two major side surfaces that are opposite each other and a plurality of minor side surfaces that are formed continuously with the major side surfaces. A mounting hole is provided at the two major side surfaces in a direction in which the mounting hole extends therethrough, and areas of the two major side surfaces are greater than those of the main surfaces. The major side surfaces and the minor side surfaces are provided with flutes along entire regions of the cutting edges.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: April 25, 2017
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Kouki Matsubara, Atsuhiko Maeta, Katsuya Nakakihara
  • Publication number: 20170106455
    Abstract: A cutting insert comprising a cutting edge formed by an intersection ridge between a rake face and a side face, the cutting edge including a major cutting edge, a flat cutting edge, and a chamfer edge disposed between the major cutting edge and the flat cutting edge, wherein in a direct view of a side face near the flat cutting edge, a ratio of installation area length L2 of the chamfer edge to installation area length L3 of the major cutting edge is L2:L3=2:8 to 5:5, and inclination angle ?1 of the chamfer edge with respect to the flat cutting edge and inclination angle ?2 of the major cutting edge with respect to the flat cutting edge are set to have a relationship of ?1<?2.
    Type: Application
    Filed: June 22, 2015
    Publication date: April 20, 2017
    Inventors: Yusuke Koike, Kouki Matsubara, Takumi Tamura, Atsuhiko Maeta
  • Patent number: 9616506
    Abstract: An object is to provide a cutting insert for a milling cutter with which efficiency in machining can be increased. The cutting insert includes two polygonal main surfaces facing each other and side surfaces each connected to a corresponding side of each of the main surfaces. The side surfaces include a major side surface through which an attachment hole extends, a first minor side surface perpendicular to the major side surface, and a second minor side surface disposed between the first minor side surface and the major side surface. A ridge between each of the main surfaces and the major side surface forms a major cutting edge, and a ridge between each of the main surfaces and the second minor side surface forms a minor cutting edge. An angle between the major cutting edge and the minor cutting edge is 145° or larger.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: April 11, 2017
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Kouki Matsubara, Atsuhiko Maeta, Katsuya Nakakihara
  • Publication number: 20170080503
    Abstract: A cutting tool including: a tool body (2) provided with an insert support seat (5) including a major seat surface (5a) that supports a bearing surface of a cutting insert, a plurality of seat side surfaces (5b, 5c) that supports side surfaces of the cutting insert at different positions, and a thinned portion (5d) continuous with the major seat surface and the seat side surfaces; and a cutting insert attached to the insert support seat, wherein a ridge at a position where the major seat surface and the thinned portion intersect, a ridge at a position where the seat side surface and the thinned portion intersect, and a ridge at a position where the thinned portions continuous with each other intersect are each formed of a convex arc curved surface.
    Type: Application
    Filed: June 3, 2015
    Publication date: March 23, 2017
    Inventors: Yusuke KOIKE, Kouki MATSUBARA, Katsuya NAKAKIHARA, Atsuhiko MAETA
  • Publication number: 20160375506
    Abstract: A cutting insert includes a first surface and a second surface each of which is polygonal and that face away from each other; a side surface that is continuous with the first surface and a side surface that is continuous with the second surface; a cutting edge formed along each of a ridge where the first surface and the side surface intersect and a ridge where the second surface and the side surface intersect; a bearing surface formed in each of a part the first surface and a part of the second surface adjacent to an insert center, the bearing surfaces disposed parallel to each other; and a recessed portion that separates the side surface that is continuous with the first surface from the side surface that is continuous with the second surface. The cutting edge includes three corner edges, a first cutting edge, and a second cutting edge, the first and second cutting edges being continuous with each other and located between each pair of the corner edges.
    Type: Application
    Filed: April 16, 2015
    Publication date: December 29, 2016
    Inventors: Yusuke Koike, Kouki Matsubara, Katsuya Nakakihara, Atsuhiko Maeta
  • Patent number: 9409240
    Abstract: A positioning section that positions a cutting edge, used in cutting, at an indexed point is provided at a portion of a round insert towards a bottom surface at a periphery of the round insert. A support seat, provided at a tool body, includes a first seat side surface, a second seat side surface, and a restraining section. The first seat side surface and the second seat side surface contact and support side surfaces of the round insert that are disposed 90 degrees apart from each other. The positioning section is fitted to the restraining section by bumpy portion fitting. Only one restraining section is provided. A second relief portion that is larger than a first relief portion is provided at a corner at a side of the second seat side surface.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: August 9, 2016
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Kouki Matsubara, Atsuhiko Maeta, Shinya Imamura
  • Patent number: D807718
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: January 16, 2018
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Kouki Matsubara, Atsuhiko Maeta
  • Patent number: D826664
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: August 28, 2018
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Kouki Matsubara, Junya Okida, Naoki Matsuda
  • Patent number: D879848
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: March 31, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Keiji Kinoshita, Kouki Matsubara, Yusuke Koike
  • Patent number: D892876
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: August 11, 2020
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Kouki Matsubara, Shota Takemura, Naoki Matsuda