Patents Assigned to NHK Spring Co., Ltd.
  • Coil spring for vehicle suspension
    Patent number: 10065471
    Abstract: A coil spring for a vehicle suspension according to one embodiment includes a lower end turn portion, an upper end turn portion, and a cylindrical effective portion between the lower end turn portion and the upper end turn portion. In at least one of the upper end turn portion and the lower end turn portion, a taper portion having a taper length and a taper thickness for controlling a force line of the coil spring is formed. The taper portion is formed such that the thickness is reduced in a tapered way from a thickness varying portion provided in the middle of the end turn portion toward a distal end of the wire along its length. The thickness varying portion is arranged at a position close to the force line.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: September 4, 2018
    Assignee: NHK SPRING CO., LTD.
    Inventor: Shinichi Nishizawa
  • ACCUMULATOR
    Publication number: 20180245606
    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: Application
    Filed: July 19, 2016
    Publication date: August 30, 2018
    Applicants: ADVICS CO., LTD., NHK SPRING CO., LTD.
    Inventors: Hideki YAMAMOTO, Hiroshi MIZUKAMI
  • Disk spring
    Patent number: 10060493
    Abstract: Provided is a disk spring which has a spring portion having a circular disk shape, the spring portion to be interposed between a pair of rotary members, for example an outer plate and a piston, being relatively movable in an axial direction to come close to and separate away from each other, wherein the spring portion has a rounded cross-section portion to be brought into contact with, for example, the outer plate, and a straight cross-section portion being continuous to the rounded cross-section portion and being formed on at least one of an inner diameter side and an outer diameter side of the spring portion so as to be allowed to be brought into contact with, for example, the piston and be compressed between both the rotary members in a close contact state.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: August 28, 2018
    Assignee: NHK Spring Co., Ltd.
    Inventor: Yusuke Terada
  • Spring forming device and forming method therefor
    Patent number: 10052677
    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: Grant
    Filed: October 8, 2014
    Date of Patent: August 21, 2018
    Assignee: NHK SPRING CO., LTD.
    Inventors: Keita Takahashi, Tohru Shiraishi, Yuichiro Ono, Kaoru Nagasawa
  • Bush for stabilizer, fastening tool, and fastening method
    Patent number: 10052929
    Abstract: Bonding the bush to the stabilizer bar, by surface pressure in the bonding surface (inner circumferential surface) of the hole-part of the bush being made uniform, bonding strength is obtained. The first arc part is formed at the opposite side of the opening of the U-shaped part of the bracket in the bonding and second arc part is formed in the opening side, in the hole-part of the bush. The first and second arc parts are circular arc parts being formed in circular arc shape or approximately circular arc shape or are ellipse arc part being formed in the ellipse arc shape or approximately ellipse arc shape. In the hole-part, the center of the first and second arc parts are separated. The curvature radius of the second arc part gets smaller than the curvature radius of the first arc part. The hole-part is formed in an oval shape.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: August 21, 2018
    Assignee: NHK SPRING CO., LTD.
    Inventors: Shigeru Kuroda, Shuji Ohmura
  • Headrest device
    Patent number: 10052989
    Abstract: A headrest device comprising: a left and right pair of headrest stays that are fixed to a seatback frame in a state projecting out toward an upper side of a seatback of a vehicle seat; a headrest main body that has the pair of headrest stays inserted inside from a lower face of the headrest main body and that is supported by the pair of headrest stays; and a removal restricting mechanism that is provided inside the headrest main body, that restricts removal of the headrest main body from the pair of headrest stays, and that releases the restriction by a release operation portion positioned inside the headrest main body being press-operated from an outside of the headrest main body.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: August 21, 2018
    Assignee: NHK Spring Co., Ltd.
    Inventors: Yoshitaka Sasaki, Yusuke Ohkawara
  • VEHICLE STABILIZER, PROCESSING DEVICE FOR EYE PORTION OF STABILIZER, AND PROCESSING METHOD FOR EYE PORTION
    Publication number: 20180229576
    Abstract: An annular reference surface is formed around a through-hole of an eye portion. A distal-end-side curved portion is formed at a first corner portion, on an outer side of the annular reference surface. The thickness of the distal-end-side curved portion is reduced in a range of a length from the first flat surface toward the distal end surface. A hole-side curved portion whose thickness is reduced toward an inner surface of the through-hole is formed at a second corner portion, on an inner side of the annular reference surface. The length of the hole-side curved portion is less than the length of the distal-end-side curved portion. The hole-side curved portion is curved with a greater curvature than that of the distal-end-side curved portion.
    Type: Application
    Filed: April 17, 2018
    Publication date: August 16, 2018
    Applicant: NHK SPRING CO., LTD.
    Inventors: Yasuharu SAKURAI, Yoshihiro KOSHITA, Akihiko NISHIKAWA, Akifumi OTANI
  • PAINT SPRAYING APPARATUS FOR STABILIZER, COATING INSTALLATION, AND COATING METHOD
    Publication number: 20180229250
    Abstract: A paint spraying apparatus includes a supporting structure, a lower nozzle unit, and an upper nozzle unit. The lower nozzle unit includes lower flexible tubes and nozzles, and ejects powder paint toward an eye portion on a lower side of a stabilizer. The upper nozzle unit includes a first frame and a second frame. First flexible tubes are arranged on the first frame. Second flexible tubes are arranged on the second frame. The upper nozzles eject the powder paint toward an eye portion on an upper side of the stabilizer.
    Type: Application
    Filed: April 17, 2018
    Publication date: August 16, 2018
    Applicant: NHK SPRING CO., LTD.
    Inventors: Yasuharu SAKURAI, Yoshihiro KOSHITA, Akifumi OTANI
  • STABILIZER FOR VEHICLE
    Publication number: 20180222267
    Abstract: A stabilizer includes a stabilizer main body, and eyes formed on both ends of the stabilizer main body. Through-holes are formed in fastening surfaces of the eyes, respectively. The stabilizer main body is covered with a main body coating film. The eye is covered with an eye coating film whose thickness is less than a thickness of the main body coating film. An inner surface of the through-hole is covered with an inner surface coating film. An incomplete coating portion is formed at a part of the inner surface of the through-hole in a circumferential direction. The incomplete coating portion is located on an extension of a straight line connecting a center of the through-hole and the center of gravity of the stabilizer main body in a side view of the stabilizer main body.
    Type: Application
    Filed: March 30, 2018
    Publication date: August 9, 2018
    Applicant: NHK SPRING CO., LTD.
    Inventors: Yasuharu SAKURAI, Yoshihiro KOSHITA, Akihiko NISHIKAWA, Akifumi OTANI
  • Steel for spring, and method for producing spring
    Patent number: 10041160
    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: Grant
    Filed: September 11, 2014
    Date of Patent: August 7, 2018
    Assignees: 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
  • COIL SPRING FOR SUSPENSION
    Publication number: 20180215227
    Abstract: A coil spring includes a wire formed of spring steel 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 at a position deviated to an outer side of the vehicle.
    Type: Application
    Filed: March 27, 2018
    Publication date: August 2, 2018
    Applicant: NHK SPRING CO., LTD.
    Inventors: Ken OKURA, Shuji OHMURA, Shusaku HAYASHI
  • COIL SPRING FOR VEHICLE SUSPENSION
    Publication number: 20180215224
    Abstract: A coil spring for use in a link-motion-type suspension includes a lower end turn portion, an upper end turn portion, and an effective portion of a cylindrical shape between the lower end turn portion and the upper end turn portion. Further, the coil spring includes a bowing control portion including a taper portion formed in at least one end turn portion of the lower end turn portion and the upper end turn portion. The taper portion has a shape whose thickness is reduced from the middle of the end turn portion toward a distal end of a wire along its length, and bowing of the effective portion is suppressed by absorbing a change in the inclination of a spring seat by the taper portion.
    Type: Application
    Filed: January 31, 2017
    Publication date: August 2, 2018
    Applicant: NHK SPRING CO., LTD.
    Inventor: Shinichi NISHIZAWA
  • SIDE-MOUNT TYPE ENGINE CONTROL APPARATUS
    Publication number: 20180215456
    Abstract: An engine control apparatus includes an apparatus body, and a control lever. The apparatus body includes a housing, an axis unit including a drive gear, a driven gear, and an angle sensor. A plurality of fixing portions are provided on the housing. A through-hole is formed in the fixing portion. The through-hole is communicated with a first side wall and a second side wall of the housing. The housing is fixed to a port-side mounting surface or a starboard-side mounting surface by a screw member inserted into the through-hole. When the control lever is operated, the drive gear and the driven gear are rotated in accordance with an angle of operation. A rotational angle of the driven gear is detected by an angle sensor.
    Type: Application
    Filed: January 17, 2018
    Publication date: August 2, 2018
    Applicant: NHK SPRING CO., LTD.
    Inventor: Taishi OZAKI
  • COIL SPRING
    Publication number: 20180215226
    Abstract: A coil spring according to one embodiment includes a lower end turn portion which is in contact with a lower spring seat, an upper end turn portion which is in contact with an upper spring seat, and an effective portion between the lower end turn portion and the upper end turn portion. The coil spring is cylindrical about an axis of the effective portion in its free shape which is not compressed. Further, with respect to a coordinate system in which a force line is assumed as a Z-axis, the coil spring is cylindrical with a constant pitch in a direction along the Z-axis in its compressed shape which is compressed to a specified height.
    Type: Application
    Filed: January 31, 2017
    Publication date: August 2, 2018
    Applicant: NHK SPRING CO., LTD.
    Inventor: Shinichi NISHIZAWA
  • COIL SPRING FOR VEHICLE SUSPENSION
    Publication number: 20180215225
    Abstract: A coil spring for a vehicle suspension according to one embodiment includes a lower end turn portion, an upper end turn. portion, and a cylindrical effective portion between the lower end turn portion and the upper end turn portion. In at least one of the upper end turn portion and the lower end turn portion, a taper portion having a taper length and a taper thickness for controlling a force line of the coil spring is formed. The taper portion is formed such that the thickness is reduced in a tapered way from a thickness varying portion provided in the middle of the end turn portion toward a distal end of the wire along its length. The thickness varying portion is arranged at a position close to the force line.
    Type: Application
    Filed: January 31, 2017
    Publication date: August 2, 2018
    Applicant: NHK SPRING CO., LTD.
    Inventor: Shinichi NISHIZAWA
  • SHIFT DEVICE FOR BOAT
    Publication number: 20180209537
    Abstract: A shift device for a boat includes a lever which can be operated about a predetermined axis, and a lever operation suppression mechanism which suppresses an operation of the lever. The lever operation suppression mechanism includes a load applying portions (a first load applying portion and a second load applying portion) which apply different loads to the lever in a first operation period of operating the lever between a neutral position of the lever and a first position corresponding to a forward movement of the boat, and in a second operation period of operating the lever between the neutral position and a second position corresponding to a backward movement of the boat.
    Type: Application
    Filed: January 11, 2018
    Publication date: July 26, 2018
    Applicant: NHK SPRING CO., LTD.
    Inventor: Kentaro KITADA
  • Thin circuit board having wall for solder material
    Patent number: 10021781
    Abstract: A thin circuit board such as a flexure has a metal support layer forming a substrate, a base insulating layer provided on the metal support layer, a wiring layer being wiring traces provided on the base insulating layer, a cover insulating layer covering the wiring layer, internal terminals provided to the respective wiring traces and sequentially arranged side by side, each one internal terminal of said internal terminals used to be solder-bonded to a corresponding external terminal through solder material, and a wall provided for the solder material on at least any one of adjacent internal terminals of said internal terminals.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: July 10, 2018
    Assignee: NHK Spring Co., Ltd.
    Inventors: Yukie Yamada, Junya Jonishi, Subaru Tomizawa
  • CLAD PIPE AND CLAD PIPE MANUFACTURING METHOD
    Publication number: 20180185896
    Abstract: A clad pipe includes: a first tubular member formed of first metal or alloy; a second tubular member provided on an inner circumferential surface of the first tubular member, and formed of a second metal or alloy of a different type from the first metal or alloy, a thickness of the second tubular member in a radial direction being at least 50 ?m; and an anchor layer formed on a boundary surface where the first tubular member and the second tubular member are in contact with each other, wherein a material of one of the first and the second tubular members digs into a material of another tubular member in the anchor layer.
    Type: Application
    Filed: June 21, 2016
    Publication date: July 5, 2018
    Applicant: NHK SPRING CO., LTD.
    Inventor: Satoshi Hirano
  • Pipe-shaped member and method of closing end portions of same
    Patent number: 9994083
    Abstract: A pipe-shaped member of the present invention is a pipe-shaped member (1) which includes a flat plate portion (1h1, 1h2) placed in at least one end portion (1a1) of two end portions of the pipe, formed in a flat plate shape, and including groove-shaped recessed portions (ta1, tb1, tb2) formed in one and another extended surfaces in the flat plate shape. The recessed portions (ta1, tb1, tb2) are formed such that the flat plate portion (1h1, 1h2) has at least a substantially W-shape, in a direction crossing a longitudinal direction of the flat plate portion (1h1, 1h2), and with a depth not reaching a boundary (1ha) between one plate (1h1) and the other plate (1h2) of the flat plate portion (1h1, 1h2).
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: June 12, 2018
    Assignee: NHK SPRING CO., LTD.
    Inventor: Kenji Katsuno
  • Hollow stabilizer
    Patent number: 9969238
    Abstract: A hollow stabilizer (1) according to the invention is formed in a hollow shape and includes a bent portion (1c1, 1c2, m1-m5). With a thickness of an inner side of the bent portion (1c1, 1c2, m1-m5) being larger than a thickness of an outer side of the bent portion (1c1, 1c2, m1-m5), a hardness of the outer side of the bent portion (1c1, 1c2, m1-m5) is higher than a hardness of the inner side of the bent portion (1c1, 1c2, m1-m5) through quenching by cooling down after heating by electrical heating.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: May 15, 2018
    Assignee: NHK SPRING CO., LTD
    Inventor: Shigeru Kuroda