Patents by Inventor Naohiko Miyata

Naohiko Miyata 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: 9492642
    Abstract: A guidewire suppresses an increase in operating resistance during pushing and pulling within a blood vessel that is extremely crooked and secures sufficient operability. The guidewire includes a core shaft and a coil body wound around the core shaft. The core shaft includes a first shaft portion positioned inside the coil body and a second shaft portion positioned proximally from the coil body. A twisted portion that is twisted along a longitudinal axis of the core shaft is provided in at least part of the second shaft portion.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: November 15, 2016
    Assignee: ASAHI INTECC CO., LTD.
    Inventors: Naohiko Miyata, Muneya Furukawa
  • Patent number: 9272122
    Abstract: A shaft suppresses a permanent set, or plastic deformation, even when inserted into an extremely winding blood vessel. A guidewire incorporates the above shaft. The shaft is twisted along its longitudinal axis and has a cross section forming a substantially rectangular shape extending in a first direction perpendicular to the longitudinal axis. The cross section has at least one arcuate recess.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: March 1, 2016
    Assignee: ASAHI INTECC CO., LTD.
    Inventors: Naohiko Miyata, Muneya Furukawa, Kenichi Matsuo
  • Patent number: 9259557
    Abstract: A shaft suppresses a rise in operation resistance as it is pushed and pulled even inside an extremely winding blood vessel and thus secures sufficient torque transmission characteristics and operability. A guidewire may employ the above-described shaft. The shaft is twisted along its longitudinal axis and has a cross section that forms a substantially rectangular shape in a direction perpendicular to the longitudinal axis. Moreover, the cross section of the shaft has a projection that projects arcuately.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: February 16, 2016
    Assignee: ASAHI INTECC CO., LTD.
    Inventors: Naohiko Miyata, Muneya Furukawa, Kenichi Matsuo
  • Publication number: 20150157830
    Abstract: A guidewire suppresses an increase in operating resistance during pushing and pulling within a blood vessel that is extremely crooked and secures sufficient operability. The guidewire includes a core shaft and a coil body wound around the core shaft. The core shaft includes a first shaft portion positioned inside the coil body and a second shaft portion positioned proximally from the coil body. A twisted portion that is twisted along a longitudinal axis of the core shaft is provided in at least part of the second shaft portion.
    Type: Application
    Filed: June 20, 2014
    Publication date: June 11, 2015
    Inventors: Naohiko MIYATA, Muneya FURUKAWA
  • Publication number: 20150119757
    Abstract: A coil body has high flexibility, satisfactorily tracks a complicated shape, and remarkably transmits fine vibrations occurring on a part of the coil body. A guide wire uses the coil body. The coil body is formed by helically winding a stranded wire including a plurality of stranded element wires. The stranded wire has a first gap as a hollow at the center of the stranded wire.
    Type: Application
    Filed: June 19, 2014
    Publication date: April 30, 2015
    Inventors: Kazuo SATO, Naohiko MIYATA, Jun IKENO
  • Publication number: 20150119861
    Abstract: A guide wire has excellent flexibility of a distal portion thereof, followability for a blood vessel and the like and transmutability of delicate interactions such as resistance produced when the distal portion slides in contact with a wall surface of a blood vessel and the like, and resistance produced when the distal portion bumps against a stenosed section and the like. The guide wire has a core shaft and a coil body covering a distal portion of the core shaft, the coil body being formed by helically winding a stranded wire having three or more elemental wires interwound together, and the stranded wire being hollow and having a first void at the center thereof.
    Type: Application
    Filed: June 24, 2014
    Publication date: April 30, 2015
    Inventors: Naohiko MIYATA, Jun IKENO, Kazuo SATO
  • Patent number: 9017268
    Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, a stranded wire that extends parallel to the core shaft, and a hollow stranded-wire coil disposed in the outer flexible tube. The hollow stranded-wire coil is formed of multiple strands and surrounds the distal end portion of the core shaft and the stranded wire. Distal ends of the hollow stranded-wire coil, the core shaft, and the stranded wire are joined to a distal end of the outer flexible tube.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: April 28, 2015
    Assignee: Asahi Intecc Co., Ltd.
    Inventors: Naohiko Miyata, Satoshi Nagano, Makoto Nishigishi
  • Publication number: 20150094691
    Abstract: A shaft suppresses a rise in operation resistance as it is pushed and pulled even inside an extremely winding blood vessel and thus secures sufficient torque transmission characteristics and operability. A guidewire may employ the above-described shaft. The shaft is twisted along its longitudinal axis and has a cross section that forms a substantially rectangular shape in a direction perpendicular to the longitudinal axis. Moreover, the cross section of the shaft has a projection that projects arcuately.
    Type: Application
    Filed: June 26, 2014
    Publication date: April 2, 2015
    Inventors: Naohiko MIYATA, Muneya FURUKAWA, Kenichi MATSUO
  • Publication number: 20150094692
    Abstract: A shaft suppresses a permanent set, or plastic deformation, even when inserted into an extremely winding blood vessel. A guidewire incorporates the above shaft. The shaft is twisted along its longitudinal axis and has a cross section forming a substantially rectangular shape extending in a first direction perpendicular to the longitudinal axis. The cross section has at least one arcuate recess.
    Type: Application
    Filed: June 26, 2014
    Publication date: April 2, 2015
    Inventors: Naohiko MIYATA, Muneya FURUKAWA, Kenichi MATSUO
  • Patent number: 8961434
    Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, a stranded wire that extends parallel to the core shaft, and a hollow stranded-wire coil disposed in the outer flexible tube. The hollow stranded-wire coil is formed of multiple strands and surrounds the distal end portion of the core shaft and the stranded wire. Distal ends of the hollow stranded-wire coil, the core shaft, and the stranded wire are joined to a distal end of the outer flexible tube.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: February 24, 2015
    Assignee: Asahi Intecc Co., Ltd.
    Inventors: Naohiko Miyata, Satoshi Nagano, Makoto Nishigishi
  • Patent number: 8956310
    Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, a stranded wire that extends parallel to the core shaft, and a hollow stranded-wire coil disposed in the outer flexible tube. The hollow stranded-wire coil is formed of multiple strands and surrounds the distal end portion of the core shaft and the stranded wire. Distal ends of the hollow stranded-wire coil, the core shaft, and the stranded wire are joined to a distal end of the outer flexible tube.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: February 17, 2015
    Assignee: Asahi Intecc Co., Ltd.
    Inventors: Naohiko Miyata, Satoshi Nagano, Makoto Nishigishi
  • Patent number: 8951210
    Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, and an inner flexible tube that surrounds a distal end portion of the core shaft. The inner flexible tube is disposed in the outer flexible tube so that a distal end thereof is positioned between the distal end of the core shaft and a proximal end of the core shaft so as to be separated from the core shaft. A first joint is formed so as to join the distal end of the inner flexible tube to the core shaft. At least one second joint is formed so as to join the outer flexible tube to the inner flexible tube. The at least one second joint is positioned between the first joint and the proximal end of the core shaft.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: February 10, 2015
    Assignee: Asahi Intecc Co., Ltd.
    Inventors: Naohiko Miyata, Satoshi Nagano, Makoto Nishigishi
  • Publication number: 20140323918
    Abstract: A coil-type guidewire includes a core shaft, a coil body, and a plurality of bonding portions that bond the core shaft and the coil body to each other. At least one loosely wound coil portion is provided in at least one of regions bounded by the bonding portions, and densely wound coil portions are disposed near the bonding portions.
    Type: Application
    Filed: February 27, 2014
    Publication date: October 30, 2014
    Applicant: ASAHI INTECC CO., LTD.
    Inventors: Naohiko MIYATA, Tadahiro KOIKE
  • Patent number: 8852126
    Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, a stranded wire that is disposed parallel to a distal end portion of the core shaft, and an inner flexible tube that surrounds a distal end portion of the core shaft and the stranded wire. The inner flexible tube is disposed in the outer flexible tube so that a distal end thereof is positioned between the distal ends of the core shaft and the stranded wire and a proximal end of the core shaft so as to be separated from the distal ends of the core shaft and the stranded wire. A joint is formed so as to join the distal end of the inner flexible tube, the core shaft, and the stranded wire to each other.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: October 7, 2014
    Assignee: Asahi Intecc Co., Ltd.
    Inventors: Naohiko Miyata, Satoshi Nagano, Makoto Nishigishi
  • Patent number: 8814890
    Abstract: In a medical equipment, a hollow shaft body is made of single-wound or plurally-wound coil line elements, and has a cylindrical tip portion formed on a distal end of the hollow shaft body, and a manipulative grip connected to a proximal side portion of the hollow shaft. At least one of an inner surface mid an outer surface of the hollow shaft, and at least one of an inner surface and outer surface of the tip portion are provided with a screw-like concave-convex streak of projection. The hollow shaft body has a diameter-reduced portion at the manipulative grip having a transparent portion, through which the diameter reduced portion is visible from outside.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: August 26, 2014
    Assignee: Asahi Intecc Co., Ltd.
    Inventors: Naohiko Miyata, Manabu Shimogami, Masaaki Nihonmatsu, Shinichi Goto
  • Publication number: 20140236124
    Abstract: A catheter has an intermediate layer with a constant thickness in first and second adjacent portion, and the adhesive strength between the intermediate layer and an inner layer is uniform. When the catheter is curved, the movement of a braid caused by the curving of the catheter can be uniformly suppressed within the adjacent first and second portions. Even if, when the catheter is curved, a tensile stress towards a proximal end acts upon a first outer layer at the first portion and a tensile stress towards a distal end acts upon a second outer layer at the adjacent second portion, the first and second outer layers are caught by an uneven contour of the intermediate layer by an anchor effect, so that it is possible to prevent peeling of the first and second outer layers from the intermediate layer.
    Type: Application
    Filed: January 17, 2014
    Publication date: August 21, 2014
    Applicant: ASAHI INTECC CO., LTD.
    Inventors: Naohiko MIYATA, Fumiyoshi OSHIMA
  • Patent number: 8758269
    Abstract: A guidewire includes a core shaft, and a coiled body wound around the outer circumferential surface of the core shaft. A bulged portion is provided at the tip portion of the core shaft. The front end of the coiled body is bonded to the front end of the core shaft with a bonding portion. The bonding portion is provided to enclose the bulged portion provided at the tip portion of the core shaft.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: June 24, 2014
    Assignee: Asahi Intecc Co., Ltd.
    Inventors: Naohiko Miyata, Makoto Nishigishi, Hideaki Maki, Tadahiro Koike, Yuuya Kanazawa
  • Patent number: 8262588
    Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, and an inner flexible tube that surrounds a distal end portion of the core shaft. The inner flexible tube is disposed in the outer flexible tube so that a distal end thereof is positioned between the distal end of the core shaft and a proximal end of the core shaft so as to be separated from the core shaft. A first joint is formed so as to join the distal end of the inner flexible tube to the core shaft. At least one second joint is formed so as to join the outer flexible tube to the inner flexible tube. The at least one second joint is positioned between the first joint and the proximal end of the core shaft.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: September 11, 2012
    Assignee: Asahi Intecc Co., Ltd.
    Inventors: Naohiko Miyata, Satoshi Nagano, Makoto Nishigishi
  • Publication number: 20120197159
    Abstract: A guidewire includes a core shaft, and a coiled body wound around the outer circumferential surface of the core shaft. A bulged portion is provided at the tip portion of the core shaft. The front end of the coiled body is bonded to the front end of the core shaft with a bonding portion. The bonding portion is provided to enclose the bulged portion provided at the tip portion of the core shaft.
    Type: Application
    Filed: January 20, 2012
    Publication date: August 2, 2012
    Applicant: ASAHI INTECC CO., LTD.
    Inventors: Naohiko MIYATA, Makoto NISHIGISHI, Hideaki MAKI, Tadahiro KOIKE, Yuuya KANAZAWA
  • Patent number: RE45444
    Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, and an inner flexible tube that surrounds a distal end portion of the core shaft. The inner flexible tube is disposed in the outer flexible tube so that a distal end thereof is positioned between the distal end of the core shaft and a proximal end of the core shaft so as to be separated from the core shaft. A first joint is formed so as to join the distal end of the inner flexible tube to the core shaft. At least one second joint is formed so as to join the outer flexible tube to the inner flexible tube. The at least one second joint is positioned between the first joint and the proximal end of the core shaft.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: March 31, 2015
    Assignee: Asahi Intecc Co., Ltd.
    Inventors: Naohiko Miyata, Satoshi Nagano, Makoto Nishigishi