Patents by Inventor Hirokazu NAKAI

Hirokazu NAKAI 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: 9806454
    Abstract: An electrical wire connection device is provided with: a shield shell, one end side having a connection part for inserting an electrical wire, the other end side having a cap part that can be mounted on a casing; a grommet including a soft material, having formed at one end side an extension cylinder part through which an electrical wire can be passed, and having formed at the other end side a skirt part fitted into the shield shell from the connection part side and fitted to the outer peripheral surface of a step part; and a grommet protective member formed of material harder than the grommet and arranged surrounding the skirt part from the outer peripheral surface side, a flange part being formed on the inner peripheral surface of the grommet protective member and pressing against the outer peripheral surface of the grommet.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: October 31, 2017
    Assignee: SUMITOMO WIRING SYSTEMS, LTD.
    Inventor: Hirokazu Nakai
  • Publication number: 20170276272
    Abstract: A grommet attachment structure and a grommet that make it possible to stabilize the force for fixing the grommet to a component. The grommet includes a main body portion that is tubular, lip portions that project from the inner peripheral surface of the main body portion and can come into contact with the outer circumferential surfaces of components, and fold back portions that are provided at positions on the main body portion on end sides in the axial direction relative to the lip portions, and that cover the formation regions of the lip portions when folded back to the outer side.
    Type: Application
    Filed: March 8, 2017
    Publication date: September 28, 2017
    Inventor: Hirokazu NAKAI
  • Publication number: 20170250528
    Abstract: A wire harness with a fixing member that is provided can prevent a fixing member from becoming shifted a large amount in the axial direction of a pipe, and enables adjustment of the position of the fixing member. The wire harness includes: a pipe (P) into which electrical wires (W) are inserted; an exterior member that has a bellows portion and surrounds the outer side of at least a portion of the pipe (P) in the axial direction, the bellows portion having mountain portions and valley portions that are successively formed in an alternating manner in the axial direction; and a fixing member that has locking portions, is attached to the exterior member, and is to be fixed to a fixing portion (B). The locking portions are locked to the bellows portion.
    Type: Application
    Filed: February 22, 2017
    Publication date: August 31, 2017
    Inventors: Masashi FUJIKI, Hirokazu NAKAI
  • Patent number: 9735513
    Abstract: A shielded shell and a shielded connector that prevents a fixing member for fixing a shielding member from interfering with another member such as a grommet. A shielding member such as a braided wire is placed on the outer circumferential surface of a shielded shell and fixed by the fixing member. The outer circumferential surface of the shielded shell is provided with a step portion that increases in diameter from the rear portion, at which a fixing region of the shielding member is positioned, toward a front portion, and is provided with position restriction portions that protrude outward from portions of the outer circumferential surface in the circumferential direction and restrict the position of the front end of the fixing member that is to be attached to the fixing region.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: August 15, 2017
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventors: Hirokazu Nakai, Motohiro Ando
  • Publication number: 20170229855
    Abstract: To achieve high waterproofness, a grommet that is attached so as to cover a shield pipe and a corrugated tube so as to bridge therebetween includes a pipe-side end portion that is formed in a tubular shape capable of being sealingly connected to an outer circumferential side of the pipe, and a corrugated-side end portion that is formed in a tubular shape capable of being sealingly connected to an outer circumferential side of the corrugated tube. A plurality of sealing lips that closely contact to an outer surface of the shield pipe are formed on an inner surface of the pipe-side end portion. The sealing lips are disposed inside and outside a width region W that is fastened by a fastening band disposed on an outer surface of the pipe-side end portion.
    Type: Application
    Filed: April 24, 2017
    Publication date: August 10, 2017
    Applicant: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Hirokazu NAKAI, Tomohiro YABASHI, Masashi HAYASHI
  • Patent number: 9716377
    Abstract: An electric wire protection member that prevents a connector or a terminal portion from coming into contact with water due to water intruding into a grommet. The electrical wire protection member disclosed by this specification includes a tube-shaped corrugated tube that protects electrical wires; a tube-shaped grommet that has a connection tube portion for connection to an opening end portion of the corrugated tube, and protects the electrical wires in place of the corrugated tube; a tube-shaped holder that has a mating tube portion that is fitted into the connection tube portion of the grommet, and abuts against the opening end portion of the corrugated tube; and a rubber stopper that has electrical wire sealing holes into which the electrical wires are inserted in a sealed state, and that comes into close contact with the inner peripheral surface of the holder.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: July 25, 2017
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventors: Noriyuki Sakagami, Hirokazu Nakai
  • Publication number: 20170207613
    Abstract: An exterior structure for a wire harness is provided with a pipe that has an electric wire insertion space that allows an electric wire to be inserted through the inside of the pipe. The pipe includes a diameter reduction portion that is defined by an inward deformation of the pipe in a diameter direction that narrows the electric wire insertion space. In the diameter reduction portion, the clearance between (i) the electric wire that is inserted through the electric wire insertion space of the pipe and (ii) the inner circumferential surface of the pipe can be reduced or eliminated, which suppresses rattling of the electric wire.
    Type: Application
    Filed: January 13, 2017
    Publication date: July 20, 2017
    Applicant: SUMITOMO WIRING SYSTEMS, LTD.
    Inventor: Hirokazu NAKAI
  • Publication number: 20170179698
    Abstract: A shielded conduction path that makes it possible to reduce the diameter of a portion where a braided wire is fixed to a pipe. The shielded conduction path includes a pipe that has a shielding function, reduced diameter portions that are formed in the outer circumference of the pipe, braided wires that have a shielding function and are arranged such that the base end portions thereof envelop the outer circumference of the reduced diameter portions, crimp rings that are arranged so as to envelop the outer circumference of the base end portions of the braided wires and fix the braided wires to the reduced diameter portions, and a conduction path main body that is inserted into the pipe and into the braided wires.
    Type: Application
    Filed: December 20, 2016
    Publication date: June 22, 2017
    Inventors: Ryo KUROISHI, Hirokazu NAKAI
  • Publication number: 20170170609
    Abstract: A shielded shell and a shielded connector that prevents a fixing member for fixing a shielding member from interfering with another member such as a grommet. A shielding member such as a braided wire is placed on the outer circumferential surface of a shielded shell and fixed by the fixing member. The outer circumferential surface of the shielded shell is provided with a step portion that increases in diameter from the rear portion, at which a fixing region of the shielding member is positioned, toward a front portion, and is provided with position restriction portions that protrude outward from portions of the outer circumferential surface in the circumferential direction and restrict the position of the front end of the fixing member that is to be attached to the fixing region.
    Type: Application
    Filed: December 7, 2016
    Publication date: June 15, 2017
    Inventors: Hirokazu NAKAI, Motohiro ANDO
  • Patent number: 9676350
    Abstract: A shielded pipe includes a pipe body that is made of a synthetic resin material and is formed into a predetermined shape, and a shielding portion that is constituted by a braided wire made of a plurality of metal wires formed into a tubular shape. The shielding portion sheathes an outer circumferential surface of the pipe body, covering the pipe body over substantially its entire length. The braided wire may be formed to be longer than the pipe body, and may protrude beyond the two ends of the pipe body. Furthermore, a heat-shrinkable tube may sheathe the braided wire and serve as a protective portion for protecting the braided wire.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: June 13, 2017
    Assignee: SUMITOMO WIRING SYSTEMS, LTD.
    Inventor: Hirokazu Nakai
  • Publication number: 20170144615
    Abstract: An electric wire sheathing member including a resin pipe with which springback can be suppressed, and a wire harness are provided. The electric wire sheathing member includes a resin pipe that has a tubular shape into which an electric wire can be inserted and that is bent into a predetermined shape, and a metal body that is integrally provided in at least a bent portion of the resin pipe and continuously extends in the axial direction. With this configuration, the rigidity of a bent portion of the resin pipe is increased by the metal body, thus making it possible to suppress the springback of the resin pipe.
    Type: Application
    Filed: November 23, 2016
    Publication date: May 25, 2017
    Inventors: Ryo KUROISHI, Hirokazu NAKAI
  • Publication number: 20170148546
    Abstract: An electric wire and a shielding member configured to electrically shield the electric wire by enclosing an outer circumference thereof. A core wire of the electric wire has a single-core portion which is formed by applying pressure to a portion of a conductor obtained by twisting a plurality of strands together to reduce their cross section. This causes the strands to be brought into intimate contact with each other and form a single body, and a stranded wire portion in which the strands remain in a twisted-together state with no pressure having been applied thereto. The shielding member has a first shielding portion enclosing a portion of the electric wire where the core wire constitutes the single-core portion, and a second shielding portion enclosing a portion of the electric wire where the core wire constitutes the stranded wire portion. The second shielding portion has higher flexibility than the first shielding portion.
    Type: Application
    Filed: June 3, 2015
    Publication date: May 25, 2017
    Inventor: Hirokazu NAKAI
  • Patent number: 9634471
    Abstract: Provided are a grommet capable of preventing a corrugated tube from being crushed due to attaching of a fixing member, and a sealing structure using a grommet. A grommet has a main portion having a tubular shape capable of being externally fitted to an end portion of an exterior member of a wire harness, the exterior member having a relatively high rigidity. An inner circumferential face of the main portion is a first sealing face capable of establishing intimate contact with an outer circumferential face of the exterior member. An outer circumferential face of the main portion is a second sealing face capable of establishing intimate contact with an inner circumferential face of an end portion of a corrugated tube, the end portion being put over the outside of the main portion.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: April 25, 2017
    Assignee: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Hirokazu Nakai, Shunya Sano
  • Publication number: 20170076841
    Abstract: There is provided an electric wire holder for holding electric wires connected to terminal fittings at end portions of the wires, the holder configured to attach to a shielding pipe to cover an edge of the shielding pipe into which the electric wires are inserted and from which the terminal fittings and a portion of the electric wires are drawn out to an outside of the shielding pipe, the holder comprising: a first holding piece configured to hold the portion of the electric wires that is drawn out from the shielding pipe and to fix a draw-out position of the terminal fittings.
    Type: Application
    Filed: November 3, 2016
    Publication date: March 16, 2017
    Applicant: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Hirokazu NAKAI, Masashi FUJIKI, Hiroyuki YOSHIKAWA
  • Publication number: 20170047724
    Abstract: To achieve high waterproofness, a grommet that is attached so as to cover a shield pipe and a corrugated tube so as to bridge therebetween includes a pipe-side end portion that is formed in a tubular shape capable of being sealingly connected to an outer circumferential side of the pipe, and a corrugated-side end portion that is formed in a tubular shape capable of being sealingly connected to an outer circumferential side of the corrugated tube. A plurality of sealing lips that closely contact to an outer surface of the shield pipe are formed on an inner surface of the pipe-side end portion. The sealing lips are disposed inside and outside a width region W that is fastened by a fastening band disposed on an outer surface of the pipe-side end portion.
    Type: Application
    Filed: October 31, 2016
    Publication date: February 16, 2017
    Applicant: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Hirokazu NAKAI, Tomohiro YABASHI, Masashi HAYASHI
  • Patent number: 9550461
    Abstract: A weight can be reduced, and a desired bent shape can be easily obtained with the shielded pipe of the present application. An electric wire that connects a battery and an inverter is inserted into a shielded pipe arranged underneath a floor of a vehicle. The shielded pipe has a pipe body that is made of a synthetic resin material and shaped into a predetermined shape. After the pipe body is shaped, a shielding portion is formed by spirally winding a ribbon-shaped metal foil around the outer circumferential surface of the pipe body. Furthermore, the shielding portion is inserted into a heat-shrinkable tube. The heat-shrinkable tube is heated and covers the outer circumferential surface of the shielding portion in a tight contact state, thus constituting a protective portion for protecting the shielding portion.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: January 24, 2017
    Assignee: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Hirokazu Nakai, Takeo Maruchi
  • Patent number: 9553431
    Abstract: A shield conductor that shields an electrical wire includes a shield pipe and a metallic braid part that are connected together by a weld along a circumferential direction. The weld may be made by ultrasonic welding. The welding may be direct welding, or welding in which a welding member is melted and then hardened to connect the shield pipe and the metallic braid part together.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: January 24, 2017
    Assignee: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Hirokazu Nakai, Yuki Oohira
  • Patent number: 9520214
    Abstract: There is provided an electric wire holder for holding electric wires connected to terminal fittings at end portions of the wires, the holder configured to attach to a shielding pipe to cover an edge of the shielding pipe into which the electric wires are inserted and from which the terminal fittings and a portion of the electric wires are drawn out to an outside of the shielding pipe, the holder comprising: a first holding piece configured to hold the portion of the electric wires that is drawn out from the shielding pipe and to fix a draw-out position of the terminal fittings.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: December 13, 2016
    Assignee: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Hirokazu Nakai, Masashi Fujiki, Hiroyuki Yoshikawa
  • Patent number: 9515467
    Abstract: To achieve high waterproofness, a grommet that is attached so as to cover a shield pipe and a corrugated tube so as to bridge therebetween includes a pipe-side end portion that is formed in a tubular shape capable of being sealingly connected to an outer circumferential side of the pipe, and a corrugated-side end portion that is formed in a tubular shape capable of being sealingly connected to an outer circumferential side of the corrugated tube. A plurality of sealing lips that closely contact to an outer surface of the shield pipe are formed on an inner surface of the pipe-side end portion. The sealing lips are disposed inside and outside a width region W that is fastened by a fastening band disposed on an outer surface of the pipe-side end portion.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: December 6, 2016
    Assignee: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Hirokazu Nakai, Tomohiro Yabashi, Masashi Hayashi
  • Publication number: 20160336097
    Abstract: An electric wire protection member that prevents a connector or a terminal portion from coming into contact with water due to water intruding into a grommet. The electrical wire protection member disclosed by this specification includes a tube-shaped corrugated tube that protects electrical wires; a tube-shaped grommet that has a connection tube portion for connection to an opening end portion of the corrugated tube, and protects the electrical wires in place of the corrugated tube; a tube-shaped holder that has a mating tube portion that is fitted into the connection tube portion of the grommet, and abuts against the opening end portion of the corrugated tube; and a rubber stopper that has electrical wire sealing holes into which the electrical wires are inserted in a sealed state, and that comes into close contact with the inner peripheral surface of the holder.
    Type: Application
    Filed: April 21, 2016
    Publication date: November 17, 2016
    Inventors: Noriyuki SAKAGAMI, Hirokazu NAKAI