Patents by Inventor Kazuto Kobayashi

Kazuto Kobayashi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10369612
    Abstract: A method and a system for producing a ring-shaped member. A punching process is carried out on an axial intermediate part of a first intermediate annular material so as to produce a pair of ring-shaped members. A punching step includes a step in which a first punching process is carried out over a first range of the axial intermediate part in the circumferential direction, and a step in which a second punching process is carried out over a second range of the axially-oriented intermediate part, which is at least partially different than the first range, in the circumferential direction. The first punching process is carried out such that at least one tab is formed. The second punching process is carried out such that at least one separate tab is formed, thereby producing the pair of ring-shaped members.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: August 6, 2019
    Assignee: NSK LTD.
    Inventors: Kazuto Kobayashi, Hiroshi Koyama, Yuu Yasuda
  • Patent number: 10352429
    Abstract: A steering rack includes a rack shaft (10), a plurality of rack teeth (11a) formed on the rack shaft and each having a tooth trace inclined with respect to a first direction perpendicular to an axial direction of the rack shaft, and a dummy tooth (33a) aligned with the rack teeth and formed on the rack shaft. The dummy tooth (33a) is non-uniformly formed in a second direction parallel to the tooth trace of the rack tooth (11a).
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: July 16, 2019
    Assignee: NSK LTD.
    Inventors: Nobuyuki Hagiwara, Yuuki Mizushima, Kazuto Kobayashi
  • Patent number: 10343209
    Abstract: A rotary press device (33) includes a restriction section (36) configured to restrict a motion of a roll (30) around a central axis of a roll (30) against movement of the roll (30) around a central axis of a hub main body (8) during rotary forging. In an example, the restriction section (36) has guide teeth (44) meshed with teeth formed on a processing surface of the roll (30).
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: July 9, 2019
    Assignee: NSK LTD.
    Inventors: Nobuyuki Hagiwara, Toshio Nakamura, Hiroshi Koyama, Isao Shintou, Kazuto Kobayashi
  • Publication number: 20190201967
    Abstract: A rotary press device (33) includes a restriction section (36) configured to restrict a motion of a roll (30) around a central axis of a roll (30) against movement of the roll (30) around a central axis of a hub main body (8) during rotary forging. In an example, the restriction section (36) has guide teeth (44) meshed with teeth formed on a processing surface of the roll (30).
    Type: Application
    Filed: March 7, 2019
    Publication date: July 4, 2019
    Applicant: NSK LTD.
    Inventors: Nobuyuki Hagiwara, Toshio Nakamura, Hiroshi Koyama, Isao Shintou, Kazuto Kobayashi
  • Patent number: 10272485
    Abstract: There is provided a method for manufacturing ring-shaped members at a good yield and high production efficiency. To achieve this object, the following is performed. A single (a sequence of) forging produces a joined body formed by radially coupling four cylindrical portions with different inner diameter sizes. A cylindrical member that has the largest inner diameter size and a cylindrical member that has the third largest inner diameter size after the forging are employed as ring-shaped members without change. A rolling process is performed on respective cylindrical member that has the smallest inner diameter size and cylindrical member that has the second largest inner diameter size to obtain ring-shaped members. Thus, two sets of ring-shaped members are obtained as two sets of inner rings and outer rings.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: April 30, 2019
    Assignee: NSK LTD.
    Inventors: Kazuto Kobayashi, Yuu Yasuda
  • Publication number: 20190059857
    Abstract: A surface property measurement technology by which a surface property of a substance can be evaluated with high accuracy, is provided. A surface property measurement method includes radiating an ultrasonic wave to a measurement target and acquiring a reflected signal from the measurement target; calculating, by a measurement apparatus, a maximum value of a cross-correlation function between the reflected signal from the measurement target and a reference reflected signal from a reference substance acquired in advance; calculating a reflection component at an interface, by using the maximum value of the cross-correlation function; and outputting, as a measurement value, one of an acoustic impedance of the measurement target or an acoustic impedance of the reference substance, according to a result of comparing the reflection component with the reference reflected signal.
    Type: Application
    Filed: September 13, 2016
    Publication date: February 28, 2019
    Applicants: SHISEIDO COMPANY, LTD., NATIONAL UNIVERSITY CORPORATION TOYOHASHI UNIVERSITY OF TECHNOLOGY, HONDA ELECTRONICS CO., LTD.
    Inventors: Yuki OGURA, Naohiro HOZUMI, Sachiko YOSHIDA, Kazuto KOBAYASHI, Yusuke HARA
  • Patent number: 10213825
    Abstract: A method of manufacturing a cylindrical ring member includes a step of forming a metal intermediate material having a cylindrical portion and a chamfering step by cold forging in which a normal chamfer portion is formed on an axial end peripheral edge of the cylindrical portion by pressing a radial end portion of an axial end surface of the cylindrical portion against an annular chamfering surface provided in a mold configuring a mold device. A chamfering step is performed by cold forging in a state where a preliminary chamfer portion, of which a width dimension in a radial direction is larger than a width dimension of the normal chamfer portion in a radial direction, is formed on the axial end peripheral edge of the cylindrical portion.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: February 26, 2019
    Assignee: NSK LTD.
    Inventors: Kouhei Mori, Shunichi Karasawa, Mizuki Watanabe, Kazuto Kobayashi
  • Publication number: 20190047609
    Abstract: A steering rack (11a) meshes with a pinion rotatably driven by the input shaft (6) of a steering gear (5) constituting an automotive steering device. The steering rack (11a) is provided with a an axially extending rod part (15) of round cross section, and a plurality of rack teeth (16) formed on a radial one side surface of an axial portion of the rod part (15), the rack teeth (16) meshing with the pinion. At least one dummy tooth (42) is formed in portions that are axial parts of the rod part (15) and are adjacent to both axial sides of the plurality of rack teeth (16). The dummy tooth (42) has a tooth height less than the rack teeth (16) and does not mesh with the pinion.
    Type: Application
    Filed: October 15, 2018
    Publication date: February 14, 2019
    Applicant: NSK LTD.
    Inventors: Yuuki Muzushima, Nobuyuki Hagiwara, Kazuto Kobayashi
  • Patent number: 10137541
    Abstract: Provided is a method for manufacturing a bearing ring member, whereby processing cost can be reduced and a high degree of freedom in design is obtained, by disposing a metal material of a raw material (13a), the metal material having excellent metal characteristics such as fatigue strength and wear resistance and excellent processing characteristics such as hardenability, in a portion that flows to a portion (raceway surface, etc.) where the characteristics of the metal material are required during use or forging of a bearing ring member. The present invention is configured from a first metal part (23) in which the raw material (13a) is formed in a cylindrical shape, and a second metal part (24) formed in a columnar shape by a metal material having more excellent metal characteristics or processing characteristics than the first metal part (23).
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: November 27, 2018
    Assignee: NSK Ltd.
    Inventors: Masahito Yamamoto, Hiroshi Koyama, Kazuto Kobayashi
  • Publication number: 20180257131
    Abstract: A method of manufacturing a cylindrical ring member includes a step of forming a metal intermediate material having a cylindrical portion and a chamfering step by cold forging in which a normal chamfer portion is formed on an axial end peripheral edge of the cylindrical portion by pressing a radial end portion of an axial end surface of the cylindrical portion against an annular chamfering surface provided in a mold configuring a mold device. A chamfering step is performed by cold forging in a state where a preliminary chamfer portion, of which a width dimension in a radial direction is larger than a width dimension of the normal chamfer portion in a radial direction, is formed on the axial end peripheral edge of the cylindrical portion.
    Type: Application
    Filed: July 18, 2017
    Publication date: September 13, 2018
    Applicant: NSK LTD.
    Inventors: Kouhei MORI, Shunichi KARASAWA, Mizuki WATANABE, Kazuto KOBAYASHI
  • Publication number: 20180214925
    Abstract: A method and a system for producing a ring-shaped member. A punching process is carried out on an axial intermediate part of a first intermediate annular material so as to produce a pair of ring-shaped members. A punching step includes a step in which a first punching process is carried out over a first range of the axial intermediate part in the circumferential direction, and a step in which a second punching process is carried out over a second range of the axially-oriented intermediate part, which is at least partially different than the first range, in the circumferential direction. The first punching process is carried out such that at least one tab is formed. The second punching process is carried out such that at least one separate tab is formed, thereby producing the pair of ring-shaped members.
    Type: Application
    Filed: December 16, 2016
    Publication date: August 2, 2018
    Applicant: NSK LTD.
    Inventors: Kazuto KOBAYASHI, Hiroshi KOYAMA, Yuu YASUDA
  • Publication number: 20180202495
    Abstract: A method of manufacturing a rotating bearing unit includes to cause one end surface in the axial direction of the forming punch (46), formed by combining a plurality of punch elements (46, 46) divided in the circumferential direction, which are displaceable in the axial direction and which are not displaceable in the circumferential direction, and having a processing teeth (44, 44) at one end surface in the axial direction, to face the other end surface of the caulking section (20) in the axial direction. In this state, rolls (30a) are rotated about the central axis (a) of the hub main body (8) while pressing the other end surface of the forming punch (46) in the axial direction with a pressing surface (43) of the roll (30a) having a central axis (?) that is inclined with respect to the central axis (?) of the hub main body (8).
    Type: Application
    Filed: July 12, 2016
    Publication date: July 19, 2018
    Applicant: NSK Ltd.
    Inventors: Nobuyuki HAGIWARA, Kazuto KOBAYASHI, Isao SHINTOU, Hiroshi KOYAMA, Toshio NAKAMURA
  • Publication number: 20180169735
    Abstract: A method for manufacturing a rolling bearing unit is provided to periodically reciprocate a stage (38) in a vertical direction by rotating and driving a servo motor (44) while rotating a roll about a central axis of a hub main body using a roll driving motor (43) in a state in which a processing surface of the roll is pressed against other end surface of a caulking section in an axial direction. A period of the reciprocation is restricted by a relation between a rotation position of the roll about the central axis of the hub main body and an engaged state between concave sections, which are sections between a plurality of processed teeth formed in the processing surface of the roll, and a face spline tooth formed by the concave section.
    Type: Application
    Filed: July 4, 2016
    Publication date: June 21, 2018
    Applicant: NSK Ltd.
    Inventors: Nobuyuki HAGIWARA, Kazuto KOBAYASHI, Isao SHINTOU, Hiroshi KOYAMA, Toshio NAKAMURA
  • Publication number: 20180128363
    Abstract: A steering rack includes a rack shaft (10), a plurality of rack teeth (11a) formed on the rack shaft and each having a tooth trace inclined with respect to a first direction perpendicular to an axial direction of the rack shaft, and a dummy tooth (33a) aligned with the rack teeth and formed on the rack shaft. The dummy tooth (33a) is non-uniformly formed in a second direction parallel to the tooth trace of the rack tooth (11a).
    Type: Application
    Filed: August 25, 2016
    Publication date: May 10, 2018
    Applicant: NSK LTD.
    Inventors: Nobuyuki HAGIWARA, Yuuki MIZUSHIMA, Kazuto KOBAYASHI
  • Patent number: 9956607
    Abstract: Construction is achieved that is capable of preventing the formation of radial streaks in the tip-end surfaces of teeth of hub-side face splines 21. When a swing center distance is taken to be L, a swing angle that is the inclination angle of the center axis of a roll 30 with respect to a main hub body 8 is taken to be ?, the pitch diameter of the hub-side face splines 21 is taken to be Dh, the number of teeth of the hub-side face splines 21 is taken to be Nh, and the number of teeth of a processing surface 31 of the roll 30 is taken to be Nr, the position relationship of the main hub body 8 and the roll 30, or in other words, at least one of the swing center distance L, the swing angle ?, and the pitch circle diameter Dh is regulated so that the relationship Nh/Nr=cos ?+(2L/Dh)┬Ěsin ? is satisfied.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: May 1, 2018
    Assignee: NSK LTD.
    Inventors: Nobuyuki Hagiwara, Toshio Nakamura, Hiroshi Koyama, Isao Shintou, Kazuto Kobayashi
  • Patent number: 9914166
    Abstract: Provided are a manufacturing method and manufacturing device that allow the depth of rack teeth to be adequately maintained across the axial direction. A stepped surface (47) is provided on one surface in the axial direction of a pressure punch (46) that moves together with a teeth-forming punch (32). The teeth-forming punch (32) is displaced downward and rack teeth are formed on the upper surface of an intermediate material (23). At the same time, the surface on the end in the axial direction of the intermediate material (23) is pressed in the axial direction by a movable die (41a) due to the engagement between the stepped surface (47) and the surface on the other side in the axial direction of the movable die (41a).
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: March 13, 2018
    Assignee: NSK LTD.
    Inventors: Nobuyuki Hagiwara, Yuuki Mizushima, Kazuto Kobayashi
  • Publication number: 20180043417
    Abstract: A rotary press device (33) includes a restriction section (36) configured to restrict a motion of a roll (30) around a central axis of a roll (30) against movement of the roll (30) around a central axis of a hub main body (8) during rotary forging. In an example, the restriction section (36) has guide teeth (44) meshed with teeth formed on a processing surface of the roll (30).
    Type: Application
    Filed: February 29, 2016
    Publication date: February 15, 2018
    Applicant: NSK LTD.
    Inventors: Nobuyuki HAGIWARA, Toshio NAKAMURA, Hiroshi KOYAMA, Isao SHINTOU, Kazuto KOBAYASHI
  • Patent number: 9803920
    Abstract: An ink drying method and device is provided for injection energy to overheated dry vapor in which saturated moisture vapor is heated and dried so as to miniaturize and cluster particles of the overheated dry vapor; apply impact energy to the clustered overheated dry vapor so as to further miniaturize the clustered particles of the overheated dry vapor and generate nano-size overheated dry vapor; and supply the nano-size overheated dry vapor in a supersaturated state into a chamber in which a substrate is placed to form an anoxic atmosphere within the chamber, infuse the nano-size overheated dry vapor into ink molecules and molecular boundaries in the anoxic atmosphere, and apply the energy of the nano-sized overheated dry vapor to the ink, so as to evaporate the moisture of the ink and degraded or reduced the organic solvent of the ink.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: October 31, 2017
    Assignees: DAIDO SANGYO CO., LTD., FUJISHOUKO CO., LTD., KENTARO ASAKURA
    Inventors: Kentaro Asakura, Shunsuke Hasegawa, Shigeyuki Takahashi, Yoshihiro Doba, Masao Fukudome, Kazuto Kobayashi, Toshiaki Yamaguchi, Yasuo Yamaguchi
  • Publication number: 20170274443
    Abstract: Construction is achieved that, together with preventing the occurrence of damage to a mandrel, is able to improve precision of the shape of a ring-shaped member after processing. A mandrel includes a pair of support shaft sections that are provided so as to be separated in the axial direction and so as to be concentric with each other, and a rolling shaft section that is concentrically provided in the axial direction between the pair of support shaft sections. One of the support shaft sections is provided in a state in which displacement in the axial direction with respect to the rolling shaft section is regulated. The other support shaft section is provided in a state in which displacement in a direction going away from the rolling shaft section is possible when a pressing force is applied in that direction.
    Type: Application
    Filed: August 20, 2015
    Publication date: September 28, 2017
    Applicant: NSK LTD.
    Inventors: Kazuto KOBAYASHI, Yuu YASUDA
  • Publication number: 20170209914
    Abstract: Construction is achieved that is capable of preventing the formation of radial streaks in the tip-end surfaces of teeth of hub-side face splines 21. When a swing center distance is taken to be L, a swing angle that is the inclination angle of the center axis of a roll 30 with respect to a main hub body 8 is taken to be ?, the pitch diameter of the hub-side face splines 21 is taken to be Dh, the number of teeth of the hub-side face splines 21 is taken to be Nh, and the number of teeth of a processing surface 31 of the roll 30 is taken to be Nr, the position relationship of the main hub body 8 and the roll 30, or in other words, at least one of the swing center distance L, the swing angle ?, and the pitch circle diameter Dh is regulated so that the relationship Nh/Nr=cos ?+(2L/Dh)┬Ěsin ? is satisfied.
    Type: Application
    Filed: July 24, 2015
    Publication date: July 27, 2017
    Applicant: NSK LTD.
    Inventors: Nobuyuki HAGIWARA, Toshio NAKAMURA, Hiroshi KOYAMA, Isao SHINTOU, Kazuto KOBAYASHI