Patents Assigned to NHK Spring Co., Ltd.
  • HOLLOW STABILIZER, STABILIZER MANUFACTURING DEVICE, AND METHOD FOR MANUFACTURING HOLLOW STABILIZER
    Publication number: 20200023707
    Abstract: A hollow stabilizer includes a curved part having eight regions defined in a cross section. A first region includes a 90° first part when the center of the inside of the curve is taken to be at 0° and the center of the outside of the curve is taken to be at 180°. A third region includes a 0° third part. A fifth region includes a 270° fifth part. A seventh region includes a 180° seventh part. The radii of curvature of the respective outer surfaces of the third part and the seventh part are larger and the radii of curvature of the respective outer surfaces of the second part and the sixth part are smaller than the radii of curvature of the respective outer surfaces of the fourth part and the fifth part.
    Type: Application
    Filed: September 27, 2019
    Publication date: January 23, 2020
    Applicant: NHK SPRING CO., LTD.
    Inventors: Norihiro KAWAKAMI, Yurika OKUDAIRA, Yuushi NOGAMI
  • VEHICLE STABILIZER AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20200009937
    Abstract: A stabilizer is provided with a restriction ring connected to a torsion portion at a connection portion adjacent to a bush. The restriction ring has a body, a female portion, a male portion, and a welded portion. The female portion has gripping portions with a spacing therebetween decreasing in the direction away from a valley bottom portion. The male portion has a neck portion, an expansion portion, and a contraction portion. The welded portion covers at least the range of the contraction portion and the valley bottom portion and melts in the plate thickness direction from the outer peripheral surface.
    Type: Application
    Filed: September 16, 2019
    Publication date: January 9, 2020
    Applicant: NHK SPRING CO., LTD.
    Inventors: Takahiro NAKAMURA, Kenji KATSUNO
  • Method for manufacturing steel for high-strength hollow spring
    Patent number: 10526675
    Abstract: A method for manufacturing steel, by quenching and tempering a seamless pipe for use as a material of a hollow spring, where the seamless pipe including predetermined components is subjected to a heat treatment which is performed to satisfy quenching conditions (1) and tempering conditions (2), (1) quenching conditions: 26,000?(T1+273)×(log(t1)+20)?29,000 900° C.?T1?1,050° C., 10 seconds?t1?1,800 seconds,??formula (1) where T1 is a quenching temperature (° C.), and t1 is a holding time (seconds) in a temperature range of 900° C. or higher, and (2) tempering conditions: 13,000?(T2+273)×(log(t2)+20)?15,500 T2?550° C., and t2?3,600 seconds,??formula (2) where T2 is a tempering temperature (° C.), and t2 is a total time (seconds) from start of heating to completion of cooling.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: January 7, 2020
    Assignees: Kobe Steel, Ltd., NHK SPRING CO., LTD.
    Inventors: Takuya Kochi, Hitoshi Hatano, Akira Tange, Kiyoshi Kurimoto, Yurika Goto
  • Headrest support structure
    Patent number: 10518678
    Abstract: A headrest support structure includes: a headrest body; a bushing; and a headrest stay, the bushing comprises a support section that supports the headrest stay in the bushing, and the support section includes: a fixed portion that is abutted against an outer peripheral face of the headrest stay, and a flexing portion that is provided on an opposite side of the headrest stay from the fixed portion, and that is capable of flexing so as to be abutted against the outer peripheral face of the headrest stay when the bushing has been inserted into the retention section and the headrest stay has been inserted into the bushing.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: December 31, 2019
    Assignees: NHK Spring Co., Ltd., Subaru Corporation
    Inventors: Nozomu Munemura, Tatsuhiro Takakusaki, Takuya Hasegawa, Naoki Endo
  • SPRING AND MANUFACTURE METHOD THEREOF
    Publication number: 20190390727
    Abstract: A spring consists of, by mass %, 0.5 to 0.7% of C, 1.0 to 2.0% of Si, 0.1 to 1.0% of Mn, 0.1 to 1.0% of Cr, not more than 0.035% of P, not more than 0.035% of S, and the balance of Fe and inevitable impurities. The spring has a structure including not less than 65% of bainite and 4 to 13% of residual austenite by area ratio in a cross section. The spring has a compressive residual stress layer in a cross section from a surface to a depth of 0.35 mm to D/4, in which D (mm) is a circle-equivalent diameter of the cross section. The spring has a high hardness layer with greater hardness than a center portion by 50 to 500 HV from a surface to a depth of 0.05 to 0.3 mm.
    Type: Application
    Filed: September 3, 2019
    Publication date: December 26, 2019
    Applicant: NHK SPRING CO., LTD.
    Inventors: Takeshi SUZUKI, Yoshiki ONO, Shimpei KUROKAWA, Kosuke SHIBAIRI
  • Rotor and method for manufacturing rotor
    Patent number: 10505432
    Abstract: A rotor includes: conductors having a bar shape; a first end ring joined to one ends of the conductors by friction stir welding, at least a surface opposite to a surface from which the conductors extend being stirred by the friction stir welding; a second end ring joined to other ends of the conductors by friction stir welding, at least a surface opposite to a surface from which the conductors extend being stirred by the friction stir welding; and an iron core disposed between the first and the second end rings, having a cylindrical shape, and including a plurality of insertion holes through which the respective conductors are insertable in a central axis direction of the iron core.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: December 10, 2019
    Assignee: NHK Spring Co., Ltd.
    Inventors: Noriyoshi Kaneda, Shota Nishihama
  • Aerosol paint composition and metallic mechanical part coated with same
    Patent number: 10501643
    Abstract: Provided are an aerosol coating composition excellent in a matte effect and capable of preventing co-rotation from occurring. The aerosol coating composition contains a modified alkyd resin, inorganic microparticles and an organic solvent. Herein, the modified alkyd resin is a non-aqueous dispersion resin which is a copolymer of a vinyl based monomer and an alkyd resin. The inorganic microparticles are made of one selected from silica, titanium oxide, zinc oxide, alumina, calcium carbonate, talc and clay or the like. The inorganic microparticles have a mean particle diameter of 1.0 to 10.0 ?m, and a content of 0.1 to 5 mass %. There is also provided a metallic mechanical part coated with the aerosol coating composition.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: December 10, 2019
    Assignee: NHK SPRING CO., LTD.
    Inventors: Kenji Minami, Yasutaka Furuta, Yuki Ogami
  • Vehicle seat
    Patent number: 10493875
    Abstract: A vehicle seat comprises: a seatback pad that configures a cushion member of a seatback, with an opening into which a connector of a child seat can be inserted from a seat front formed so as to penetrate through a lower end section of the seatback pad in a seat front-rear direction, and a front end of the opening having a width along a seat width direction that is narrower than a seat width direction width of the connector; a connection member that is provided at a seat rear side with respect to the front end of the opening, and to which the connector inserted into the opening is to be connected; and an elastic member that is provided at the seatback pad.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: December 3, 2019
    Assignee: NHK Spring Co., Ltd.
    Inventors: Keiichiro Fujiwara, Ryousuke Tanaka, Masaharu Sanpei
  • Seat driving device
    Patent number: 10486555
    Abstract: A seat 1 has a seat cushion 2 and a seat back 3 and is mounted on a vehicle such as a car. A reclining mechanism 4 capable of adjusting the tilt angle of the seat back 3 is provided between the seat cushion 2 and the seat back 3. The reclining mechanism 4 has a seat driving device 21 provided with an electric motor 22 and a speed reduction mechanism 23. The speed reduction mechanism 23 has a worm shaft 45 connected to a motor shaft 34 of the motor 22 and a worm wheel 47 meshed with a worm 46 of the worm shaft 45. The worm 46 is a multi-thread worm having two or more threads.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: November 26, 2019
    Assignees: MITSUBA CORPORATION, NHK SPRING CO., LTD.
    Inventors: Naohiro Iwatate, Junichi Busujima, Kenichi Katsube, Takeshi Nakamura
  • Lock release lever attachment structure
    Patent number: 10486561
    Abstract: A lock release lever attachment structure includes: a case that includes a case body, an upper portion of which opens as a first opening, and a first flange, a slit being formed to penetrate through at least a portion of the first flange in a seat up-down direction along a peripheral edge of the first opening; an operation lever that releases a locked state of a seatback; and a cover that includes a cover body, an upper portion of which opens as a second opening, and a second flange, the first and second openings being placed in communication by inserting the cover body into the case body through the first opening and fixing the cover body inside the case body, and an edge of a covering material that covers a surface of the seatback being inserted into the slit and gripped by the first and the second flanges.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: November 26, 2019
    Assignee: NHK Spring Co., Ltd.
    Inventors: Jun Shirai, Koji Matsuyama
  • Flexure of hard disk drive
    Patent number: 10475476
    Abstract: A flexure of a hard disk drive includes a metal base, and a conductive member formed on the metal base. The conductive member includes an insulating layer and a conductive layer. The insulating layer has a flat portion and an elevated portion projected from the flat portion. The conductive layer has a connecting terminal formed along the side surface.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: November 12, 2019
    Assignee: NHK SPRING CO., LTD.
    Inventor: Yukie Yamada
  • Needle attachment and detachment assist device
    Patent number: 10471221
    Abstract: A needle attachment and detachment assist device includes a frame body, a syringe guide jig, and a needle guide jig. A guide hole is formed in the syringe guide jig. In the needle guide jig, a needle insertion hole is formed on a central axis of the guide hole. The needle insertion hole includes a center hole portion and a rib guide groove. When a syringe is inserted into the guide hole, and a needle member is further inserted into the needle insertion hole, rotation prevention of the needle member is achieved. In this state, when the syringe is rotated in a first direction, the needle member can be clamped to a thread portion of the syringe. When the syringe is rotated in a second direction, the needle member can be loosened.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: November 12, 2019
    Assignee: NHK SPRING CO., LTD.
    Inventor: Yasumasa Tsukamoto
  • Vehicle seat
    Patent number: 10471858
    Abstract: A vehicle seat that includes: a support bracket that is provided at a floor of a vehicle; a rotation bracket that is coupled to the support bracket; a lock member that is provided at the floor; a lower rail being fixed to the rotation bracket and being locked by the lock member; an upper rail that is attached to the lower rail so as to be capable of sliding in a vehicle front-rear direction; a seat body that is fixed to the upper rail; a rotation force application member that applies rotation force to the rotation bracket such that the lower rail rotates in a direction in which the seat body springs up; and a speed reduction member that reduces a rotation speed of the rotation bracket in a case in which the seat body springs up.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: November 12, 2019
    Assignee: NHK Spring Co., Ltd.
    Inventors: Tetsuya Sasaki, Yukihiro Hakuta, Shigeo Fujii, Tomoyuki Sato, Daichi Takigawa
  • Method of manufacturing ceramic sintered body, ceramic sintered body, and ceramic heater
    Patent number: 10462850
    Abstract: A method of manufacturing a ceramic sintered body, includes: a film forming step of forming, on a surface of a heat-resistant metal material, a metal coating film made of a metal material having a standard free energy of formation of metal carbides lower than that of the heat-resistant metal material; a molding step of disposing the heat-resistant metal material provided with the coating film in the film forming step at a predetermined position in powder that serves as a starting material of a ceramic base, and molding a ceramic green body by press-molding the powder; and a sintering step of generating a ceramic sintered body by sintering the ceramic green body molded in the molding step.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: October 29, 2019
    Assignee: NHK Spring Co., Ltd.
    Inventors: Satoshi Hirano, Toshihiro Tachikawa, Junichi Miyahara, Toshihiko Hanamachi
  • ALUMINUM ALLOY AND FASTENER MEMBER
    Publication number: 20190316230
    Abstract: An aluminum alloy contains 0.7% to 1.8% of silicon, 0.5% to 2.1% of copper, 0.4% to 1.8% of manganese, 0.6% to 1.6% of magnesium, and 0.1% to 0.7% of zinc in terms of mass ratio and the balance aluminum with inevitable impurities.
    Type: Application
    Filed: February 16, 2017
    Publication date: October 17, 2019
    Applicants: NHK SPRING CO., LTD., TOPURA CO., LTD.
    Inventors: Noriyoshi KANEDA, Takeshi SUZUKI, Kouhei MIYAMOTO, Naoki HORIUCHI
  • Hollow stabilizer
    Patent number: 10442269
    Abstract: A hollow stabilizer has a tubular shape and is provided with a torsion section that is provided to a vehicle and that extends in the vehicle width direction; an arm section that extends in the front-back direction of the vehicle; and bent sections that connect the torsion section and the arm section. The hardness of the outer surface of the bent inner sides of the bent sections of the hollow stabilizer is 70% or more with respect to the hardness of the outer surface of the arm section.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: October 15, 2019
    Assignee: NHK Spring Co., Ltd.
    Inventors: Yutaka Wakabayashi, Ken Takahashi, Masato Sugawara, Hideki Okada
  • Laminate and method of fabricating laminate
    Patent number: 10435792
    Abstract: A laminate includes: a substrate; and a metallic coating that is formed from copper powder containing 0.002% to 0.020% by weight of phosphorus and having been subjected to reduction treatment, the metallic coating being deposited on the substrate.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: October 8, 2019
    Assignee: NHK Spring Co., Ltd.
    Inventors: Masaru Takimoto, Yuichiro Yamauchi, Satoshi Hirano, Naoya Aikawa
  • Piezoelectric element having polymer coating, piezoelectric actuator using said piezoelectric element, and head suspension using said piezoelectric actuator
    Patent number: 10431245
    Abstract: A piezoelectric element easily and surely forms polymer coatings on peripheral end faces of the piezoelectric element without deteriorating a yield of the piezoelectric element. The piezoelectric element is manufactured by a method including steps of cutting a piezoelectric element out from a base piezoelectric material plate so that peripheral end faces are formed to define a peripheral shape of the piezoelectric element, and forming polymer coatings on at least objective areas of the peripheral end faces of the piezoelectric element by vapor deposition polymerization.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: October 1, 2019
    Assignee: NHK Spring Co., Ltd.
    Inventor: Akira Nojima
  • Stabilizer link
    Patent number: 10415633
    Abstract: A stabilizer link of the present invention includes connecting parts that has a housing which supports a ball stud to be connected to the first or second structure so as to be swingable and rotatable, wherein the ball stud has a stud part extending from a spherical part and the housing houses a support member to support a spherical part of the ball stud in a spherical space so as to be slidable, wherein the support member includes: an opening where the spherical space is open for the stud part; a lubricant receiving part in a concave shape that faces the opening; and a wall surface that forms the spherical space for the spherical part to slide thereon and has recessed grooves formed on both sides or one side of a portion of the wall surface having the maximum inner radius about the central axis of the spherical space.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: September 17, 2019
    Assignee: NHK Spring Co., Ltd.
    Inventor: Shigeru Kuroda
  • Method for producing hollow stabilizer
    Patent number: 10415110
    Abstract: A method of manufacturing a hollow stabilizer includes a forming step of subjecting an element pipe to a bending process, to form a product shape including bent portions, and a quenching step of quenching the element pipe subjected to the bending process. In the quenching step, a cooling process is performed by immersing the element pipe made of steel in coolant and by spraying the coolant to an outer surface of the bent portion.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: September 17, 2019
    Assignee: NHK Spring Co., Ltd.
    Inventors: Yutaka Wakabayashi, Ken Takahashi, Masato Sugawara, Hideki Okada