Patents by Inventor Yuki MASUBUCHI

Yuki MASUBUCHI 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).

  • Publication number: 20200405346
    Abstract: A removal device and a removal system are configured to effectively remove an object in a body lumen while suppressing damage to another device. The removal device includes an elongated shaft part, and a cutting part fixed to a distal portion of the shaft part. The proximal portion of the cutting part includes a ring-shaped cutting blade, and a surface of the cutting part on which the cutting blade is positioned is inclined relative to center axis of the shaft part at an angle greater than 0 degrees and less than 90 degrees.
    Type: Application
    Filed: September 10, 2020
    Publication date: December 31, 2020
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Masaomi IMAI, Takashi KITAOKA, Kazuaki KANAMOTO, Yuki MASUBUCHI
  • Publication number: 20200289148
    Abstract: A method and device handle having a slide assembly are disclosed for controlling rotational speed of a catheter assembly under various rotational loads. The method includes: driving a catheter assembly at a target rotational speed in a first direction; detecting an actual rotational speed of the catheter assembly in the first direction; comparing the target rotational speed and the actual rotational speed of the catheter assembly in the first direction; and stopping the driving of the catheter assembly in the first direction before a completion of predetermined number of rotations in the first direction when the actual rotational speed decreases a predetermined value over a predetermined time frame.
    Type: Application
    Filed: March 15, 2019
    Publication date: September 17, 2020
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Yuki Masubuchi, Steve Woodard, Mansour Saleki
  • Publication number: 20200289150
    Abstract: A method and device handle having a slide assembly are disclosed for controlling rotational speed of a catheter assembly under various rotational loads. The method includes setting a first current limit in a processor, activating the catheter assembly to rotate, calculating a current value in rotational period of a first current limit, updating a second current limit from the first current limit, and wherein the second current limit is lower than the first current limit.
    Type: Application
    Filed: March 15, 2019
    Publication date: September 17, 2020
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Yuki Masubuchi, Steve Woodard, Mansour Saleki
  • Publication number: 20200222076
    Abstract: A medical device is disclosed that can effectively destroy an object in a biological lumen, a method for controlling rotation of the medical device, and a rotation controller. The medical device to be inserted into a biological lumen to destroy a thrombus in the biological lumen includes a long shaft portion that is rotationally driven, a drive unit that rotates the shaft portion, a breaking member that is provided at a distal portion of the shaft portion and is rotatable, and a control unit that controls the rotation of the drive unit, in which the control unit controls the drive unit to repeat the rotation while interposing a stop of the rotation between rotations of the drive unit.
    Type: Application
    Filed: March 26, 2020
    Publication date: July 16, 2020
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Takashi KITAOKA, Masaomi IMAI, Kazuaki KANAMOTO, Yuki MASUBUCHI
  • Patent number: 10696598
    Abstract: To provide a dielectric porcelain composition and an electronic component that demonstrate ferroelectricity. A dielectric porcelain composition that is characterized by having a perovskite-type oxynitride as a principal component and by including a polycrystalline body that demonstrates ferroelectricity.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: June 30, 2020
    Assignees: TDK CORPORATION, NATIONAL UNIVERSITY CORPORATION HOLLAIDO UNIVERSITY
    Inventors: Kumiko Yamazaki, Yuki Nagamine, Takeshi Shibahara, Shinichi Kikkawa, Yuji Masubuchi
  • Publication number: 20190202744
    Abstract: To provide a dielectric porcelain composition and an electronic component that demonstrate ferroelectricity. A dielectric porcelain composition that is characterized by having a perovskite-type oxynitride as a principal component and by including a polycrystalline body that demonstrates ferroelectricity.
    Type: Application
    Filed: February 1, 2017
    Publication date: July 4, 2019
    Applicants: TDK CORPORATION, NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Kumiko YAMAZAKI, Yuki NAGAMINE, Takeshi SHIBAHARA, Shinichi KIKKAWA, Yuji MASUBUCHI
  • Publication number: 20190192175
    Abstract: A method for suctioning an object in a blood vessel, the method comprising: inserting an expansion portion connected to a shaft portion on a distal portion of the shaft portion into the blood vessel; expanding the expansion portion in the blood vessel; inserting a suction catheter along the shaft portion into the blood vessel; reciprocating at least the expansion portion or the suction catheter relative to each other along an axial axis of the shaft portion; and suctioning the object with the suction catheter.
    Type: Application
    Filed: February 28, 2019
    Publication date: June 27, 2019
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Takahiro CHIDA, Masaomi IMAI, Yuki MASUBUCHI, Takashi KITAOKA, Kazuaki KANAMOTO
  • Publication number: 20190183519
    Abstract: A medical device to be inserted into a blood vessel for effectively removing an object flowing in a biological lumen while reducing the burden on the living body includes an elongated shaft portion, and an expansion portion which is an elastically deformable cylindrical body having a plurality of gaps and in which a proximal portion or a distal portion of the cylindrical body is interlocked with the shaft portion. The expansion portion has a ring-shaped or annular bent portion which protrudes toward a proximal side position radially outside the expansion portion in a bent state of being bent along an axial direction, and an axial length of a second portion from the bent portion to a proximal end of the expansion portion is shorter than an axial length of a first portion from the bent portion to the distal end of the expansion portion.
    Type: Application
    Filed: February 22, 2019
    Publication date: June 20, 2019
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Masaomi Imai, Takahiro Chida, Yuki Masubuchi, Takashi Kitaoka, Kazuaki Kanamoto
  • Publication number: 20190175212
    Abstract: A medical device and a treatment method are disclosed capable of breaking an object in a body lumen efficiently with a lower burden on body lumen tissues. A medical device is disclosed that is inserted into the body lumen so as to crush an object in the body lumen, the medical device including: an elongated shaft that is to be rotatably driven, and a deformable breaking member that is connected to the shaft so as to be rotatable and extends along the shaft. The breaking member has a first contact portion and a second contact portion. The first contact portion is located most outward in the radial direction of the breaking member in a state in which the breaking member is expanded radially outward. The second contact portion is located more outward in the radial direction of the breaking member than the first contact portion in a contracted state.
    Type: Application
    Filed: February 13, 2019
    Publication date: June 13, 2019
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Takashi KITAOKA, Masaomi Imai, Yuki Masubuchi, Takahiro Chida, Kazuaki Kanamoto, Hideki Fujimagari
  • Publication number: 20190000500
    Abstract: A medical device for crushing an object in a body lumen, the medical device including: an elongated shaft portion rotatably driven; a crushing unit provided with bendable wire rods and rotatable together with the shaft portion; and a sliding unit fixed to each of end portion of the wire rods on at least one of a distal side of and a proximal side of the wire rods and is interlocked with the shaft portion so as to be slidable in an axial direction of the shaft portion. The shaft portion is provided with contact portions that come into contact with the sliding unit during rotation and limit relative rotation of the shaft portion and the sliding unit. After the sliding unit is attached to the contact portions, the sliding unit rotates in the same direction as the shaft portion along with the rotation of the shaft portion.
    Type: Application
    Filed: September 7, 2018
    Publication date: January 3, 2019
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Yuki Masubuchi, Masaomi Imai, Takashi Kitaoka, Takahiro Chida, Kazuaki Kanamoto, Yukitoshi Kato
  • Patent number: 9925073
    Abstract: A stent is disclosed, which is formed in a cylindrical shape and has a cavity portion, and is freely switched between an expanded state and a contracted state where the stent contracts to a central axis (O) side from the expanded state. The stent has an anchor portion which protrudes to a central axis (O) side relative to an inner surface surrounding the cavity portion in the contracted state, and which is displaced to the inner surface side in the expanded state relative to a protruded position in the contracted state.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: March 27, 2018
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventor: Yuki Masubuchi
  • Patent number: 9662236
    Abstract: A stent delivery system wherein, in a gap between an inner tube body and an outer tube body, a sealing member is arranged on the proximal side relative to a distal opening of a lumen, which extends from the proximal end of the inner tube body, and a guide wire leading-out hole. The inner circumferential surface of the sealing member is fixed to the outer circumferential surface of a first proximal tube of the inner tube body, and the outer circumferential surface of the sealing member is in sliding contact with the inner circumferential surface of a second proximal tube of the outer tube body. When blood or the like enters into the stent delivery system via the distal ends of the inner tube body and the outer tube body, progress of the blood or the like toward an operating unit side is inhibited by the sealing member.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: May 30, 2017
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventor: Yuki Masubuchi
  • Publication number: 20160022446
    Abstract: A stent is disclosed, which is formed in a cylindrical shape and has a cavity portion, and is freely switched between an expanded state and a contracted state where the stent contracts to a central axis (O) side from the expanded state. The stent has an anchor portion which protrudes to a central axis (O) side relative to an inner surface surrounding the cavity portion in the contracted state, and which is displaced to the inner surface side in the expanded state relative to a protruded position in the contracted state.
    Type: Application
    Filed: October 1, 2015
    Publication date: January 28, 2016
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventor: Yuki MASUBUCHI
  • Publication number: 20150290004
    Abstract: A living body lumen treatment system includes a sheath that internally has a receiving lumen, and a stent that is received in a contracted state by the receiving lumen and that expands by being exposed from the sheath. A first region to which a drug is applied and a second region to which the drug is not applied are set to be located on an outer surface of the stent. The sheath has a protrusion portion protruding beyond an inner wall. In the stent, the second region is brought into contact with and supported by the protrusion portion so as not to bring the first region into contact with the inner wall.
    Type: Application
    Filed: June 25, 2015
    Publication date: October 15, 2015
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventor: Yuki MASUBUCHI
  • Publication number: 20140025155
    Abstract: A stent delivery system wherein, in a gap between an inner tube body and an outer tube body, a sealing member is arranged on the proximal side relative to a distal opening of a lumen, which extends from the proximal end of the inner tube body, and a guide wire leading-out hole. The inner circumferential surface of the sealing member is fixed to the outer circumferential surface of a first proximal tube of the inner tube body, and the outer circumferential surface of the sealing member is in sliding contact with the inner circumferential surface of a second proximal tube of the outer tube body. When blood or the like enters into the stent delivery system via the distal ends of the inner tube body and the outer tube body, progress of the blood or the like toward an operating unit side is inhibited by the sealing member.
    Type: Application
    Filed: September 24, 2013
    Publication date: January 23, 2014
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventor: Yuki MASUBUCHI