Patents Assigned to NHK Spring Co., Ltd.
  • Patent number: 9449624
    Abstract: A tail pad portion is provided in a flexure tail including a metal base and a conductive circuit portion. Tail terminals are arranged in the tail pad portion. The metal base is made of stainless steel, and includes a frame structure having a first frame and a second frame. An opening is formed between the first frame and the second frame. The tail terminals are arranged parallel to each other between the first frame and the second frame. A bridge portion is formed between the first frame and the second frame. The bridge portion includes at least one bridge element which is a part of the metal base. The at least one bridge element is arranged at a position which does not overlap the tail terminals in the thickness direction.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: September 20, 2016
    Assignee: NHK SPRING CO., LTD.
    Inventors: Hajime Arai, Futa Sasaki
  • Patent number: 9446690
    Abstract: A power seat operation device is configured in such a manner that, when a dial member is rotated and operated, a movable mechanism which is to be operated is selected from among movable mechanisms. When a switch member is rotated and operated, the selected movable mechanism is actuated. The switch member is rotated and operated about a rotation axis extending in the widthwise direction of the seat. Thus the direction of operation of the switch member can be aligned with or nearly aligned with both the direction of the actual movement of a seat back when a recliner mechanism is actuated and the direction of the actual movement of an ottoman when an ottoman mechanism is actuated. Also, in a state in which a seat slide mechanism is selected, the direction of the operation of the switch member is aligned with the front-rear direction of the seat.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: September 20, 2016
    Assignee: NHK SPRING CO., LTD.
    Inventors: Ryohei Shigematsu, Shinji Iino, Souichi Nakayama, Masato Shirao, Takeshi Nakamura, Masahiro Oda, Kenichi Katsube
  • Patent number: 9440570
    Abstract: In a vehicle seat, beads are formed to a SC panel, and the beads extend along the seat front-rear direction adjacent to joint portions at seat width direction insides of the joint portions. When repeated load in the seat up-down direction is input to a seat width direction intermediate portion of the SC panel, for example, the SC panel is displaced by the input load in the seat up-down direction, and tensile load in the seat width direction acts on the beads as a result. The beads extend or contract in the seat width direction due to the tensile load. Load input to the SC panel is thereby absorbed by the extension and contraction of the beads, and load in the seat up-down direction input to the joint portions is reduced. This enables concentration of stress at the joint portions to be suppressed.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: September 13, 2016
    Assignee: NHK SPRING CO., LTD.
    Inventors: Motohiro Fushikida, Shinichi Kobayashi, Tomo Ishibashi, Masakazu Andou
  • Publication number: 20160254013
    Abstract: A flexure of a disk drive suspension with a magnetic head having first and second elements. The flexure includes a metal base, a conductive circuit along the metal base, and a tail pad in a flexure tail of the flexure. The tail pad includes first and second frames with an opening therebetween; a first pair of tail terminals arranged between and insulated from the first and second frames, connected to the first element; a second pair of tail terminals arranged between and insulated from the first and second frames, connected to the second element; and a third pair of tail terminals arranged between and insulated from the first and second frames, connected to a third element. First, second and third bridge elements of the metal base are arranged between first tail terminals, second tail terminals, and third tail terminals, respectively. A first bridge-free opening portion is between the first and second tail terminals, and a second bridge-free opening portion is between the first and third tail terminals.
    Type: Application
    Filed: May 9, 2016
    Publication date: September 1, 2016
    Applicant: NHK SPRING CO., LTD.
    Inventors: Hajime ARAI, Futa SASAKI
  • Patent number: 9429190
    Abstract: A tolerance ring that has a ring shape approximately circling along a predetermined direction includes a plurality of projections, wherein the curvature radiuses of end portions in a circling direction are smaller than the curvature radius of a portion other than the end portions in the circling direction.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: August 30, 2016
    Assignee: NHK Spring Co., Ltd.
    Inventors: Norihiro Tajima, Michinobu Hirama, Atsushi Shitama
  • Patent number: 9429255
    Abstract: A hollow seamless pipe for a high-strength spring in the present invention includes a steel material in which chemical component compositions are properly adjusted, wherein a depth of a whole decarburized layer in an inner surface layer part is 100 ?m or less, a depth of a flaw which is present in an inner surface is 40 ?m or less, a width of the flaw is 60 ?m or less, and a number density of a carbide which has a circle equivalent diameter of 500 nm or more and is present in the inner surface layer part is 1.8×10?2 particles/?m2 or less.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: August 30, 2016
    Assignees: KOBE STEEL, LTD., SHINKO METAL PRODUCTS CO., LTD., NHK SPRING CO., LTD.
    Inventors: Takuya Kochi, Hitoshi Hatano, Eiichi Tamura, Kotaro Toyotake, Takashi Yajima, Akira Tange
  • Publication number: 20160243607
    Abstract: A spring forming device in which the steel wire can be continuously cut off without stopping the feeding of the steel wire in cutting, and in which the steel wire can be uniformly heated, is provided. The spring forming device has a wire supplying mechanism for supplying a steel wire using a plurality of feeding rollers, a heating mechanism for heating the steel wire, a coiling mechanism for forming in a coil state the heated steel wire, and a cutting mechanism for cutting the steel wire coiled at a given number of turns off the steel wire remained backward. A cutting blade of the cutting mechanism follows tracks having a speed Va that moves to the receiving blade and a speed Vc that moves in an axial direction of the coiled steel wire, in cutting of the steel wire.
    Type: Application
    Filed: October 8, 2014
    Publication date: August 25, 2016
    Applicant: NHK SPRING CO., LTD.
    Inventors: Keita TAKAHASHI, Tohru SHIRAISHI, Yuichiro ONO, Kaoru NAGASAWA
  • Publication number: 20160238098
    Abstract: A coil spring modeling apparatus includes a first attachment member disposed on a lower spring seat, a second attachment member disposed on an upper spring seat, an actuator unit formed of a Stewart-platform-type parallel mechanism, a hydraulic pressure supply device, a torsion detection mechanism, and a controller. The torsion detection mechanism is constituted of displacement gauges such as a linear variable differential transformer. The displacement gauges are provided on hydraulic cylinders, and detect amounts of displacement relative to the reference lengths of the hydraulic cylinders, respectively. The controller calculates a relative torsional angle between the first attachment member and the second attachment member based on the detected displacement.
    Type: Application
    Filed: February 12, 2015
    Publication date: August 18, 2016
    Applicants: NHK INTERNATIONAL CORPORATION, NHK SPRING CO., LTD.
    Inventors: Takahiro NAKAMURA, Kazuo FURUKAWA, Senri MORIYAMA, Ryuichi SATO, Shinichi NISHIZAWA
  • Publication number: 20160238473
    Abstract: A coil spring modeling apparatus includes an actuator unit formed of a Stewart-platform-type parallel mechanism, a first inner load cell accommodated in a first attachment member, a second inner load cell accommodated in a second attachment member, and a rotation support mechanism. The actuator unit is rotatably supported by the rotation support mechanism about an axis. The first inner load cell is arranged on the first seat adapter coaxially with the rotation support mechanism, and detects an axial force acting on the lower spring seat and a moment. The second inner load cell is arranged under the second seat adapter coaxially with the rotation support mechanism, and detects an axial force acting on the upper spring seat and a moment.
    Type: Application
    Filed: February 12, 2015
    Publication date: August 18, 2016
    Applicants: NHK INTERNATIONAL CORPORATION, NHK SPRING CO., LTD.
    Inventors: Takahiro NAKAMURA, Kazuo FURUKAWA, Senri MORIYAMA, Ryuichi SATO, Shinichi NISHIZAWA
  • Publication number: 20160239004
    Abstract: A coil spring modeling apparatus includes a first attachment member disposed on a lower spring seat, a second attachment member disposed on an upper spring seat, an actuator unit formed of a Stewart-platform-type parallel mechanism, a spring height detection mechanism, and a controller. The spring height detection mechanism is constituted of displacement gauges such as a linear variable differential transformer. These gauges are provided on hydraulic cylinders, and detect amounts of displacement relative to the reference lengths of the hydraulic cylinders, respectively. A hydraulic pressure supply device is controlled by the controller and supplies fluid pressure according to the displacement detected by the gauges to the respective hydraulic cylinders.
    Type: Application
    Filed: February 12, 2015
    Publication date: August 18, 2016
    Applicants: NHK SPRING CO., LTD., NHK INTERNATIONAL CORPORATION
    Inventors: Takahiro NAKAMURA, Kazuo FURUKAWA, Senri MORIYAMA, Ryuichi SATO, Shinichi NISHIZAWA
  • Patent number: 9414441
    Abstract: A shaft-equipped heater unit includes a heater plate that heats an object to be heated placed thereon, and a shaft part that supports the heater plate, wherein the shaft part is formed by spraying material powder which constitutes the shaft part on the heater plate at a temperature lower than a melting point of the material powder by heated compressed gas.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: August 9, 2016
    Assignee: NHK Spring Co., Ltd.
    Inventors: Gou Takahara, Toshihiro Tachikawa, Junichi Miyahara
  • Publication number: 20160222497
    Abstract: Provided is high strength steel for springs that, compared to conventional high strength steel for springs, has excellent decarburization resistance and scale exfoliation property, by optimization of the added amounts of C, Si, Mn, and Cr as well as of Sb and Sn. The steel for springs contains C: more than 0.45 mass % and less than 0.65 mass %, Si: 0.15 mass % or more and 0.70 mass % or less, Mn: 0.10 mass % or more and 1.00 mass % or less, Cr: 0.20 mass % or more and 1.50 mass % or less, P: 0.025 mass % or less, S: 0.025 mass % or less, O: 0.0015 mass % or less, Sb: 0.010 mass % or more and less than 0.030 mass %, and Sn: 0.010 mass % or more and 0.030 mass % or less, under predetermined conditions.
    Type: Application
    Filed: September 11, 2014
    Publication date: August 4, 2016
    Applicants: JFE STEEL CORPORATION, SUMIHATSU CO., LTD., NHK SPRING CO., LTD.
    Inventors: Minoru HONJO, Kiyoshi UWAI, Shigeru ENDO, Katsutoshi YAMASHITA, Koei TSURU, Keiichi FUJIE, Akira TANGE
  • Patent number: 9404547
    Abstract: A steel for high-strength spring has an Ac3 transformation temperature as an indicator of the decarburization performance, which is calculated by Equation (1) below, is from 859 to 885° C., a maximum hardened diameter DI as an indicator of the hardening performance, which is calculated by Equation (2) below, is from 70 to 238 mm, and a temper hardness HRC as an indicator of the spring performance, which is calculated by Equation (3) below, is from 50 to 55. Ac3=910?203×?{square root over (C)}?15.2Ni+44.7Si+104V+31.5Mo+13.1W??(1) DI=DO×fSi×fMn×fP×fS×fCu×fNi×fCr??(2) HRC=38.99+17.48C+2.55Si?2.28Ni+2.37Cr+8.04Ti??(3) wherein, D0=8.65×?{square root over (C)}, fSi=1+0.64×% Si, fMn=1+4.10×% Mn, fP=1+2.83×% P, fS=1?0.62×% S, fCu=1+0.27×% Cu, fNi=1+0.52×% Ni, and fCr=1+2.33×% Cr.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: August 2, 2016
    Assignee: NHK SPRING CO., LTD.
    Inventors: Hideki Okada, Akira Tange, Koichi Tango, Isao Sumiyoshi
  • Patent number: 9403457
    Abstract: There is provided a headrest including a main body member, a stay member, and a stopper member, the stopper member including a circular cylinder shaped circular cylinder portion, a cantilevered portion, a projection portion, and a restriction portion that is formed extending from the circular cylinder portion so as to abut an end portion of a support member when an attempt is made to pull the stay member out from the support members in a projecting state in which both end sides of the stay member are inserted into the support member and project out from end portions of the support members, thereby restricting pulling out of the stay member from the support members.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: August 2, 2016
    Assignee: NHK SPRING CO., LTD.
    Inventors: Shinichi Nakata, Tomohiro Hirose, Masaharu Sanpei
  • Patent number: 9403451
    Abstract: A headrest device comprising: a headrest stay that is coupled to an upper end portion of a seatback of a vehicle seat, and that supports a headrest pad; an internal structure that is embedded inside the headrest pad, that is supported from a rear by the headrest stay, and that supports a head of an occupant from the rear during a vehicle rear-on collision via a support face that is formed at a front face of the internal structure; and a forward projection portion that is configured by a portion of the headrest stay that projects forward, that is disposed at an upper side or a lower side of the support face within the headrest pad, and that suppresses the head supported by the support face from tilting backward or tilting forward by pivoting about the support face as a pivoting center.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: August 2, 2016
    Assignee: NHK SPRING CO., LTD.
    Inventors: Nozomu Munemura, Kensuke Nagai, Tadanori Hisamoto
  • Patent number: 9404941
    Abstract: A contact probe includes a conductive first plunger including, on a same axis, a distal end portion, a flange portion, a boss portion, and a base end portion, a conductive second plunger including, on the same axis, a second distal end portion and a boss portion, and a coil spring including a coarsely wound portion formed by winding at a predetermined pitch with an inner diameter equal to or larger than a diameter of the boss portion of the first plunger and a tightly wound portion formed by tightly winding with an inner diameter substantially equal to a diameter of the boss portion of the second plunger, so that the first plunger and the second plunger are connected to each other on the same axis.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: August 2, 2016
    Assignee: NHK Spring Co., Ltd.
    Inventors: Toshio Kazama, Kazuya Souma, Akihiro Matsui
  • Patent number: 9400027
    Abstract: An elliptical coned disc spring can be accommodated in a rectangular installation space, can yield non-linear load characteristics, and can reduce stress differences between a bending part at a long radial part side and a bending part at a short radial part side. An elliptical coned disc spring has a body in which an outer circumference is an ellipse in a disc shape. A hole is formed at the center of the body. The hole may have various shapes such as a circle, an ellipse, etc. The body has a long radial part 111 and a short radial part. A plate width of the long radial part is set to be greater than a plate width of the short radial part (that is, a>b).
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: July 26, 2016
    Assignee: NHK SPRING CO., LTD.
    Inventors: Hironobu Imaizumi, Norihiro Tajima
  • Publication number: 20160208846
    Abstract: An outer casing for a control cable 10 has an inner tube 12, which includes a resin tube having a tubular resin layer and two metal wires buried, in the resin layer of the resin tube, in parallel with an axial direction and at positions symmetrical with each other about an axis of the resin tube, in which when an outer diameter of the resin tube is D (mm) and a distance between the two metal wires is A (mm), the following formulae (1) and (2) are satisfied. 1.5?D?4??(1) 0.5 D?A?0.
    Type: Application
    Filed: August 8, 2014
    Publication date: July 21, 2016
    Applicant: NHK SPRING CO., LTD.
    Inventors: Akihiko Kitazawa, Iroku Suzuki, Kouichi Kusakawa
  • Patent number: 9396747
    Abstract: An interleave circuit includes a metal base, an insulating layer, a first conductor member having first branch conductors, a second conductor member having second branch conductors, and a jumper conductor, which is a part of the metal base. The jumper conductor includes a branch-side metal portion, a pad-side metal portion, and a bridge portion. The bridge portion is formed between the branch-side metal portion and the pad-side metal portion. The branch-side metal portion electrically conducts to connecting terminals of the first branch conductors via branch-side connecting members. The pad-side metal portion electrically conducts to an electrode pad via a pad-side connecting member. The bridge portion includes a crossover portion which crosses over a third conductor member.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: July 19, 2016
    Assignee: NHK SPRING CO., LTD.
    Inventor: Sei Kawao
  • Patent number: D764385
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: August 23, 2016
    Assignee: NHK SPRING CO., LTD.
    Inventors: Masaya Komazaki, Go Nagayasu