Patents Assigned to NHK Spring Co., Ltd.
  • 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: 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: 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: 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: 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
  • 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
  • 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: 10899188
    Abstract: A coil spring includes a wire shaped to be helical, and is compressed between an upper spring seat and a lower spring seat. The coil spring includes an upper portion and a lower portion. A positive pitch winding end portion is formed on the upper portion of the coil spring. A terminal-point-strong-abutting-portion is formed at a distal end of the winding end portion. The terminal-point-strong-abutting-portion is in contact with the upper spring seat at one point at a position deviated to an inner side of a vehicle with respect to a coil central axis. On the lower portion of the coil spring, an end turn portion which contacts the lower spring seat is formed.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: January 26, 2021
    Assignee: NHK SPRING CO., LTD.
    Inventors: Ken Okura, Shuji Ohmura, Shusaku Hayashi
  • 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
  • Publication number: 20210017084
    Abstract: A thermally conductive composite particle, including: a core portion including an inorganic particle; and a shell portion including a nitride particle and covering the core portion, is provided. The thermally conductive composite particle is a sintered body.
    Type: Application
    Filed: September 26, 2020
    Publication date: January 21, 2021
    Applicant: NHK SPRING CO., LTD.
    Inventors: Kohei SUZUKI, Toshiaki MARUICHI
  • Patent number: 10889878
    Abstract: An alloy material includes: a composition, in a composition range of a ternary alloy of silver (Ag), palladium (Pd), and copper (Cu), the composition containing 20 to 30 wt % of Ag, 35 to 55 wt % of Pd, and 20 to 40 wt % of Cu. The composition as a base is added with tin (Sn) in a range of 0.5 to 2.5 wt %, further added with any one of or a combination of cobalt (Co), chromium (Cr), and zinc (Zn) in a range of 0.1 to 1.0 wt %, and added with 0.01 to 0.1 wt % of either one of or a combination of iridium (Ir) and ruthenium (Ru).
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: January 12, 2021
    Assignees: NHK Spring Co., Ltd., YAMAKIN CO., LTD.
    Inventors: Toshio Kazama, Yoshihisa Tani, Satoshi Shoji, Teruo Anraku, Masayuki Ainoya, Tomohiro Kubota, Kotaro Toyotake, Hitoshi Abe
  • Patent number: 10851804
    Abstract: An accumulator according to an embodiment includes, for example, a base member; a cover member welded to the base member, the cover member and the base member defining a pressure chamber therebetween; a stretchable partition member that partitions the pressure chamber into an inner chamber and an outer chamber; and a labyrinth structure provided in at least one of a first part of the base member and a second part of the cover member. The first part is located closer to the outer chamber than a welded part between the base member and the cover member. The second part is located closer to the outer chamber than the welded part, facing the first part.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: December 1, 2020
    Assignee: NHK SPRING CO., LTD.
    Inventors: Hideki Yamamoto, Hiroshi Mizukami
  • Patent number: 10850589
    Abstract: A stabilizer includes: a stabilizer bar made of a pipe material; and a stabilizer link that couples the stabilizer bar and a suspension device. The stabilizer link includes a ball stud which includes a shaft portion inserted to and fixed in an opening end of the stabilizer bar and a ball portion formed at a leading end of the shaft portion, a housing which rotatably supports the ball portion, and a flexible dust cover which includes one end attached on the housing so as to be unmovable in a ball stud axis direction and the other end attached on at least either of the shaft portion and the stabilizer bar and which seals a space between the housing and the ball stud.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: December 1, 2020
    Assignee: NHK SPRING CO., LTD.
    Inventors: Shuji Ohmura, Shigeru Kuroda
  • Patent number: 10836013
    Abstract: A coil spring includes a helically formed wire having end turn portions at ends thereof, a plurality of first rough surfaces, each including first shot peening indentations formed on a part of a surface of the end turn portions, and a second rough surface including second shot peening indentations formed on the entire surface of the wire except for the first rough surface. The second rough surface has a surface roughness different from that of the first rough surface.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: November 17, 2020
    Assignee: NHK SPRING CO., LTD.
    Inventors: Senri Moriyama, Satoshi Akiyama, Masaya Komazaki, Go Nagayasu, Hideki Okada, Daisuke Yokota
  • Patent number: 10836228
    Abstract: This ball joint is provided with: a ball stud, one end being fastened to a suspension device/stabilizer, and the other end having a ball part; a housing that rotatably supports the ball part of the ball stud; and a ball seat provided so as to be interposed between the housing and the ball part, the ball seat having an inner spherical part for accommodating the ball part. The ball seat is provided to the housing by insert injection molding. The inside diameter dimension of the inner spherical part formed by separate injection molding is set to a dimension corresponding to the anticipated amount of molding shrinkage of the resin during the insert injection molding.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: November 17, 2020
    Assignee: NHK SPRING CO., LTD.
    Inventor: Shigeru Kuroda
  • Patent number: 10837095
    Abstract: A hollow stabilizer production method of a hollow stabilizer used for a vehicle includes attaching a first mounting member and a second mounting member respectively to one end and another end of a formed steel tube and heating the steel tube. The method includes feeding a carburizing gas into the interior space of the heated steel tube through the first mounting member, and collecting the air and/or the surplus carburizing gas from the interior space through the second mounting member to thereby carburize the steel tube inner surface. The method includes rapidly cooling the heated steel tube to thereby quench the steel tube continuously from the carburization.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: November 17, 2020
    Assignee: NHK SPRING CO., LTD.
    Inventors: Morimichi Kai, Akira Tange