Patents Assigned to NHK Spring Co., Ltd.
  • Patent number: 11065641
    Abstract: Provided is a coil spring manufacturing method. In the coil spring manufacturing method, a coil spring of a vehicle suspension member is immersed in a fluidized bed in which powder coat is fluidized for coating. The fluidized bed includes a vertical stream area in which the powder coat moves upward and downward. The coil spring is immersed in the vertical stream area of the fluidized bed while an end coil of the coil spring faces upward, and is periodically subjected to a relative movement with respect to a direction containing components vertical to a central axis of the coil spring in relation to the vertical stream area.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: July 20, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventors: Yoshimitsu Koyama, Mitsuhiro Sugiyama, Tatsuya Watanuki
  • Patent number: 11069374
    Abstract: A method of restoring a suspension of a hard disk drive includes detaching a slider, which is mounted on a tongue portion of the suspension via an adhesive, from the suspension, measuring a thickness of the adhesive in a cleaning area of the tongue portion, specifying a first residual area in which the thickness of the adhesive exceeds a threshold value, irradiating a first irradiation area including the first residual area locally with a first laser beam, and irradiating the cleaning area entirely with a second laser beam.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: July 20, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventor: Akio Mashima
  • Patent number: 11059344
    Abstract: A stabilizer includes bend sections. With respect to positions in a circumferential direction of a radial cross section of each of the bend sections, a center of an inside of a bend is defined as 0°, and a center of an outside of the bend is defined as 180°. The bend sections each include a bend interior section located at 0°, a bend exterior section located at 180°, a first side section located at 90°, and a second side section located at 270°. The bend interior section has compressive residual stress from a surface to a first depth. The bend exterior section has compressive residual stress to a second depth. The first side section has compressive residual stress to a third depth. The second side section has compressive residual stress to a fourth depth.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: July 13, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventors: Yasuharu Sakurai, Yoshihiro Koshita, Akihiko Nishikawa, Akifumi Otani
  • Patent number: 11052455
    Abstract: A caulking jig comprises a main body, a blade portion having a blade edge, a projection member fit in the main body, an urging member which urges the projection member, and an engagement mechanism configured to engage the projection member to the main body. In a state in which the projection member is not engaged, the projection member is held at a projected position where a distal end portion of the projection member is projected from the blade edge. In a state in which the projection member is engaged, the projection member is held at an entered position where the distal end portion is retracted to a more entered position than the blade edge.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: July 6, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventors: Satoshi Hirano, Arata Tatsumi, Takatoshi Nanbu
  • Publication number: 20210190134
    Abstract: An axial ball joint is provided with: a ball stud including a stud section and a ball section; a metallic housing which rotatably supports the ball section of the ball stud; and a resin-made ball seat which is provided to be interposed between the ball section and the housing. The housing is formed into a bottomed cylinder shape by pressing. The thickness of a bottom wall and the thickness of a circumferential side wall of the housing are set to be equal to each other. A plurality of bead sections are formed on the inner bottom of the housing by press-molding or forging.
    Type: Application
    Filed: May 31, 2019
    Publication date: June 24, 2021
    Applicant: NHK SPRING CO., LTD.
    Inventor: Shigeru KURODA
  • Publication number: 20210193177
    Abstract: The flexure tail includes a tail body, a first bent portion extending in a width direction of the tail body, a second bent portion extending in a length direction of a flexure, a tail pad portion, a conductor bent portion where a direction of a conductor changes, an extension portion, and a test conducting portion. The test conducting portion includes a conductor connecting portion conductive to a conductor, a jumper conductor, and a test pad arranged in the extension portion. The jumper conductor has a first end portion connected to the conductor connecting portion, and a second end portion connected to the test pad.
    Type: Application
    Filed: November 23, 2020
    Publication date: June 24, 2021
    Applicant: NHK SPRING CO., LTD.
    Inventor: Yukie YAMADA
  • Patent number: 11041524
    Abstract: A ball joint has a ball stud, a housing and a ball seat. The seat is an elastic body in a tubular shape with the top and the bottom being open, and has a spherical space to accommodate a ball portion. The housing has a spherical inner face that is close to an outer periphery of the ball portion, to accommodate the ball portion in the inner face via the seat so as to support the ball stud. A clamped portion arranged at a peripheral end of the housing is clamped to press the seat so that the ball stud can be swung and rotated.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: June 22, 2021
    Assignee: NHK Spring Co., Ltd.
    Inventor: Shigeru Kuroda
  • Publication number: 20210174827
    Abstract: A plate material has a first portion, a second portion, and a fracture portion connecting the first portion and the second portion, and is separated into the first portion and the second portion by tearing the fracture portion. The first portion and the second portion are arranged in a first direction. The fracture portion has thin portions arranged in a second direction crossing the first direction. Widths in the second direction of the thin portions are different from each other.
    Type: Application
    Filed: November 23, 2020
    Publication date: June 10, 2021
    Applicant: NHK SPRING CO., LTD.
    Inventor: Masaru Inoue
  • Patent number: 11028893
    Abstract: An elastic member is an elastic member formed of a wire having a cross section that is substantially circular, the cross section being orthogonal to a longitudinal direction, and the elastic member being expandable and contractible in a predetermined direction; and including: a first alloy portion that is made of an aluminum alloy having a tensile strength larger than 950 MPa and equal to or less than 1100 MPa at room temperature; and a second alloy portion configured to cover the first alloy portion, the second alloy portion having a thickness in a radial direction smaller than a radius of the first alloy portion, and being made of an aluminum alloy having a tensile strength of 100 MPa to 650 MPa at room temperature.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: June 8, 2021
    Assignee: NHK Spring Co., Ltd.
    Inventors: Toshio Kazama, Noritoshi Takamura, Shigeki Ishikawa, Takeshi Suzuki
  • Publication number: 20210151073
    Abstract: A suspension for a disk device includes a load beam, a flexure and first and second damper members. The load beam includes a first surface, a second surface and first and second openings. The flexure includes first and second outriggers. The first outrigger includes a first branch portion through the first opening, a distal end thereof being interposed between the second surface and the first damper member. The second outrigger includes a second branch portion through the second opening, a distal end thereof being interposed between the second surface and the second damper member.
    Type: Application
    Filed: October 19, 2020
    Publication date: May 20, 2021
    Applicant: NHK SPRING CO., LTD.
    Inventor: Yukie YAMADA
  • Patent number: 11001690
    Abstract: Provided is a foamed urethane containing a cushion material, the foamed urethane containing a hard segment and a soft segment, in which the foamed urethane is a reaction cured product formed using an isocyanate component of an MDI compound. In a first aspect, a spin-spin relaxation time (T2) of the hard segment in the foamed urethane is from 20 ?sec to 40 ?sec, and a volume abundance ratio of the hard segment is from 5% to 40%. In a second aspect, a foamed urethane includes: a first region in which T2 of the hard segment is from 30 ?sec to 40 ?sec, and a volume abundance ratio of the hard segment is from 10% to 40%, and a second region in which T2 of the hard segment is from 20 ?sec to less than 30 ?sec, and a volume abundance ratio of the hard segment is from 5% to 40% in a H1 solid-state pulse NMR measurement, and which is adjacent to the first region.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: May 11, 2021
    Assignee: NHK SPRING Co., Ltd.
    Inventors: Shigeki Ichimura, Kunikazu Takiwaki, Kunio Asobe, Hiroyuki Orito, Takaharu Matsuo, Kiyoshi Ota, Hitoshi Komatsu, Taiki Futamura, Toshiharu Sato
  • Patent number: 10995811
    Abstract: The present invention provides a coil spring, in which a corresponding portion is provided at an end portion in a direction of a coil axis, the corresponding portion having a whole size in the direction of the coil axis of the plurality of wire materials adjacent to each other in the direction of the coil axis equal to a maximum value of a gap in the direction of the coil axis between wire materials adjacent to each other in the direction of the coil axis of the coil spring, a gap in the direction of the coil axis between the corresponding portion and a wire material adjacent to the corresponding portion on an inner side in the direction of the coil axis is smaller than a wire height in an active coil portion of the coil spring, and at the end portion of the direction of the coil axis, a gap in the direction of the coil axis between a portion extending around the coil axis from the corresponding portion to a distal end portion side of the wire material and a wire material adjacent to the portion on the inner
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: May 4, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventors: Toshinori Watanabe, Hidemasa Ito, Noritoshi Takamura, Fumio Yamamoto, Fumio Takahashi
  • Patent number: 10995382
    Abstract: The invention provides a production method for stabilizers which produces with high productivity in a compact production line, without tempering. The production method for stabilizers of the invention includes: forming a steel bar material containing at least C: 0.15 wt % to 0.39 wt %, Mn, B and Fe into a product shape by bending; and quenching the bent steel bar material in a medium having a heat transfer coefficient higher than or close to that of water.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: May 4, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventors: Shinichiro Kuwatsuka, Yurika Okudaira, Akira Tange, Hideki Okada, Ken Takahashi
  • Patent number: 10994458
    Abstract: Provided is a method for manufacturing a ball joint including a ball-seat molding step for forming a ball seat assembly by using, as a core, a ball section of a ball stud, the ball section of which is integrally provided in advance at one end portion of a stud section, and insert-molding a ball seat made of resin to cover at least a portion of the ball section present on an opposite side to the stud section, and a housing molding step for insert-molding a housing made of resin by using, as a core, the ball section partially covered by the ball seat of the ball seat assembly.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: May 4, 2021
    Assignee: NHK Spring Co., Ltd.
    Inventor: Shigeru Kuroda
  • Patent number: 10991388
    Abstract: A suspension for a disk device includes a load beam, a flexure and first and second damper members. The load beam includes a first surface, a second surface and first and second openings. The flexure includes first and second outriggers. The first outrigger includes a first branch portion through the first opening, a distal end thereof being interposed between the second surface and the first damper member. The second outrigger includes a second branch portion through the second opening, a distal end thereof being interposed between the second surface and the second damper member.
    Type: Grant
    Filed: October 19, 2020
    Date of Patent: April 27, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventor: Yukie Yamada
  • Patent number: 10974110
    Abstract: Provided is a golf shaft comprising an element tube made of steel, a plating layer formed on an outer periphery of the element tube, an outer layer covering the plating layer, an adhesive layer interposed between the plating layer and the outer layer to bond between the plating layer and the outer layer. The outer layer is formed of a fiber reinforced plastic having a matrix resin that is an epoxy resin, and the adhesive layer is an epoxy resin composition or a carbon nano tube resin composition, the epoxy resin composition comprising an epoxy resin and a mixed curing agent in which two or more kinds of amine-based curing agents are mixed, and the carbon nano tube resin composition comprising an epoxy resin and at least one kind of curing agents as well as dispersed carbon nano tubes.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: April 13, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventors: Kosuke Fujiwara, Akihisa Inoue
  • Patent number: 10978101
    Abstract: A wiring structure of a head suspension including a flexure that supports a head and is attached to a load beam applying load onto the head, includes write wiring and read wiring formed on the flexure and connected to the head, each having wires of opposite polarities and further including a stacked interleaved part which includes segments electrically connected to the respective wires of the write wiring, the segments stacked on and facing the wires through an electrical insulating layer so that the facing wire and segment have opposite polarities, is manufactured by a wiring step, an insulating layer forming step and a stacked interleaved part forming step.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: April 13, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventor: Hajime Arai
  • Publication number: 20210101431
    Abstract: The ball joint includes a metal ball stud which includes a ball section and a resin housing which rotatably supports the ball section of the ball stud. A limiting member configured to limit molding shrinkage of the housing is embedded in the housing at an interval with respect to an equatorial section of the ball section such that the limiting member is positioned to surround at least the equatorial section of the ball section.
    Type: Application
    Filed: March 23, 2018
    Publication date: April 8, 2021
    Applicant: NHK SPRING CO., LTD.
    Inventor: Shigeru KURODA
  • Patent number: 10933770
    Abstract: A power seat device is configured to acquire a target associated position of a tilted position, corresponding to a current position of a seatback for allowing the seatback to reach an end position in a reclining range, and a seat to reach an end position in a tilting range simultaneously. Outputs of a reclining motor and a tilting motor are adjusted so that the tilted position coincides with the acquired target associated position.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: March 2, 2021
    Assignees: IMASEN ELECTRIC INDUSTRIAL CO., LTD., NHK SPRING CO., LTD.
    Inventors: Atsutoshi Goto, Hiroyuki Kojima, Takanari Matsumoto, Kenichi Katsube, Daisuke Tanaka
  • Patent number: 10900112
    Abstract: A hollow spring member and hollow spring member production method can be provided, which can save the time and energy necessary for carburization, thus requiring no dedicated carburizing furnace or the like for carburization, and further can make the interior space of a steel tube a rust-prevention atmosphere. A hollow stabilizer for a vehicle includes a steel tube sealed at one end and another end thereof and a carburizing gas sealed in the interior space of the steel tube.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: January 26, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventors: Morimichi Kai, Akira Tange