Patents by Inventor Kenichiro Otsuka

Kenichiro Otsuka 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: 11054587
    Abstract: An optical connector is disclosed. The optical connector includes a rear housing, an inner housing, and an outer housing. The inner housing includes a retaining hole to accommodate a ferrule. The outer housing is disposed on an outer periphery of the inner housing to cover a front portion of the inner housing. The outer housing rotates about the central axis with respect to the inner housing by a rotation guiding mechanism cooperating with an adapter for connecting the optical connector to another optical connector. The outer housing includes a front wall covering the distal end of the inner housing. The front wall includes at least one opening region. The opening region corresponds to a fiber exposed surface of the ferrule when the outer housing is rotated with respect to the inner housing from an initial position to a connected position by the rotation guiding mechanism.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: July 6, 2021
    Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., Japan Communication Accessories Manufacturing Co., Ltd.
    Inventors: Kenichiro Otsuka, Motoyoshi Kimura, Masaki Omura, Steve Cheng
  • Patent number: 11027781
    Abstract: The present invention provides a hot-stamping formed article which is long and formed of a single steel sheet, the hot-stamping formed article including: two standing wall portions; a top sheet portion adjacent to the two standing wall portions; and a protrusion portion including an overlapping portion in which a portion of the steel sheet extending from at least one standing wall portion of the two standing wall portions and a portion of the steel sheet extending from the top sheet portion overlap, in which an angle between the top sheet portion and the protrusion portion in a case where a plane perpendicular to a longitudinal direction of the hot-stamping formed article is viewed in a cross section is larger than 90°.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: June 8, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventor: Kenichiro Otsuka
  • Patent number: 11000890
    Abstract: A panel-shaped formed product made of a metal sheet includes a top panel portion, an opening portion, and a vertical wall portion. The top panel portion is polygonal. The opening portion is provided in the top panel portion. The vertical wall portion extends from at least not less than two adjacent borders among the borders of the top panel portion. At least one pair of each vertical wall portion of pairs of adjacent vertical wall portions of the vertical wall portions has a stepped portion. As a result, the panel shaped formed product has fewer defects such as cracks and wrinkles even when it has a shape that is difficult to form.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: May 11, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kenichiro Otsuka, Yoshiaki Nakazawa, Naruhiko Nomura, Toshiya Suzuki, Masahiro Kubo
  • Publication number: 20210086313
    Abstract: This wire for gas-shielded arc welding is a wire for joining a plurality of thin steel sheets by gas-shielded arc welding, the wire including, in mass %, with respect to a total mass of the wire: C: 0.06 to 0.15%; Si: more than 0 to 0.18%; Mn: 0.3 to 2.2%; Ti: 0.06 to 0.30%; Al: 0.001 to 0.30%; and B: 0.0030 to 0.0100%, in which Si, Mn, Ti, and Al satisfy Expressions (1) and (2). Si×Mn?0.30??Expression (1) (Si+Mn/5)/(Ti+Al)?3.
    Type: Application
    Filed: December 17, 2018
    Publication date: March 25, 2021
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Shinji KODAMA, Masahiro MATSUBA, Masafumi AZUMA, Yoichiro MORI, Kenichiro OTSUKA, Tetsuro NOSE, Tomokatsu IWAKAMI, Kazutaka MARUYAMA
  • Publication number: 20210061362
    Abstract: A front pillar outer includes a first member and a second member. The first member includes a first glass-surface-side flange part and a first door-side flange part. The sheet thickness of the second member is thinner than the sheet thickness of the first member. The second member includes a second glass-surface-side flange part and a second door-side flange part. The first door-side flange part protrudes further towards the rear end of the front pillar outer than the first glass-surface-side flange part and a first main body part, and overlaps with the second door-side flange part. The second glass-surface-side flange part overlaps with a rearward region of the first glass-surface-side flange part. A second main body part overlaps with a rearward region of the first main body part. In a region in which the first member overlaps with the second member, the first member is joined to the second member.
    Type: Application
    Filed: January 11, 2019
    Publication date: March 4, 2021
    Applicant: NIPPON STEEL CORPORATION
    Inventor: Kenichiro OTSUKA
  • Patent number: 10913102
    Abstract: A drawn body for a vehicle structural member has a tensile strength of 980 MPa or more, radii of curvature of two first convex ridge portions, a second convex ridge portion, and a concave ridge portion are each 30 mm or less, a corner radius of a corner wall is 30 mm or less, and a forming depth which is a separation distance between a top sheet portion and an outwardly-extending flange is 40 mm or more.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: February 9, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kenichiro Otsuka, Takashi Miyagi
  • Patent number: 10898938
    Abstract: This method for manufacturing a panel-like formed article has preparing a blank material made of a metal sheet having a tensile strength of 390 MPa or more and 980 MPa or less; and press-forming the blank material in a cold manner using a pressing apparatus to form the blank material into the panel-like formed article, in the press-forming, a blank holder, a first punch, and a second punch are relatively moved with respect to a die, thereby pressing the first punch and the second punch to the blank material, and pressing of the second punch to the blank material is completed before pressing of the first punch to the blank material.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: January 26, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kenichiro Otsuka, Koichi Hamada, Yoshiaki Nakazawa
  • Patent number: 10857858
    Abstract: This door inner panel is a door inner panel formed of a metal sheet and includes a first panel portion having a first top sheet portion and a first standing wall portion connected to the first top sheet portion, a second panel portion having a second top sheet portion disposed with a gap with the first top sheet portion of the first panel portion and a second standing wall portion connected to the second top sheet portion, a flange portion connected to the first standing wall portion and the second standing wall portion, and a flat sheet portion disposed between the first panel portion and the second panel portion, the first standing wall portion and the second standing wall portion respectively have a level difference portion, and both ends of the flat sheet portion are integrated with the flange portion or the level difference portions.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: December 8, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kenichiro Otsuka, Atsushi Ono, Yoshiyuki Kaseda, Yoshiaki Nakazawa
  • Publication number: 20200376534
    Abstract: A hot-stamping formed article is formed of a single steel sheet, and includes: a top sheet portion; a pair of standing wall portions; and a protrusion portion which connects the top sheet portion to the standing wall portion and protrudes outward from the top sheet portion, in which the protrusion portion includes an inner wall portion which stands upright from the top sheet portion, and an outer wall portion which is folded outward from an end edge of the inner wall portion, and an angle between the top sheet portion and the protrusion portion is 80° to 90°.
    Type: Application
    Filed: July 13, 2017
    Publication date: December 3, 2020
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventor: Kenichiro OTSUKA
  • Publication number: 20200346267
    Abstract: The present invention provides a hot-stamping formed article made of steel, in which the hot-stamping formed article has at least one of a tensile strength of 1200 MPa or more and a martensitic steel structure and includes a first portion, a corner portion, and a second portion, which are sequentially continuous from one end portion to the other end portion in a longitudinal direction, each of the first portion, the corner portion, and the second portion includes a top sheet and two vertical walls connected to the top sheet when viewed in a cross section perpendicular to the longitudinal direction, the second portion includes a first outwardly-extending flange adjacent to the vertical wall, and the corner portion includes a vertical flange extending from the vertical wall of the first portion, a second outwardly-extending flange adjacent to the vertical wall located on an outer peripheral side of the corner portion out of the two vertical walls, and a transition portion in which the vertical flange and the se
    Type: Application
    Filed: September 8, 2017
    Publication date: November 5, 2020
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Kenichiro OTSUKA, Yoshiyuki KASEDA, Yoshiaki NAKAZAWA
  • Patent number: 10807137
    Abstract: A method for producing a press-formed product that includes a pair of flat sections and a bend section that connects the flat sections, in which a bending radius of the bend section is R2 and an interior angle formed by the pair of flat sections is ?2, includes the steps bellow. In the first forming step, an intermediate formed product including a bend section in which a bending radius is R1 and an interior angle is ?1 is formed. In the second forming step, a portion of a bend section of the intermediate formed product is formed into the bend section of the press-formed product. R1, ?1, R2 and ?2 satisfy the conditions of Formulae (1) to (3) below: 1.05<A1/A2??(1); 1.0<R1/R2??(2); A1/A2<6.0/(R1/R2)??(3), where, A1, A2 represents the supplementary angle of the interior angle ?1, ?2, respectively.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: October 20, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kenichiro Otsuka, Yoshiaki Nakazawa, Ryuichi Nishimura, Masahiro Saito
  • Patent number: 10768376
    Abstract: An optical connector is disclosed. The optical connector includes a rear housing, an inner housing, an arm and an outer housing. The inner housing includes at least one retaining hole to house a ferrule. The rear housing moves linearly and rotates with respect to the inner housing. The arm moves linearly together with the rear housing with respect to the inner housing. The outer housing disposed on an outer periphery of the inner housing covers a front portion of the inner housing. The outer housing rotates with respect to the inner housing by a rotation guiding mechanism cooperating with the arm. The outer housing includes a forward wall covering the distal end of the inner housing. An opening area of the forward wall can be aligned with the retaining hole of the ferrule when the outer housing is rotated from an initial position to a connected position.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: September 8, 2020
    Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., JAPAN COMMUNICATION ACCESSORIES MANUFACTURING CO., LTD.
    Inventors: Kenichiro Otsuka, Motoyoshi Kimura, Masaki Omura, Steve Cheng
  • Patent number: 10758959
    Abstract: A manufacturing method includes a preparing step, an intermediate pressing step, a heating step, and a hot stamping step. In the preparing step, a blank is prepared. In the intermediate pressing step, press working is applied to the blank to produce an intermediate formed product. In the heating step, the intermediate formed product is heated. In the hot stamping step, press working is applied to the intermediate formed product to produce a panel-like formed product. In the hot stamping step, a machine including a first die, a second die, a punch, and a blank holder is used. While the intermediate formed product is pinched between the first die and the punch, the second die and the blank holder are moved relative to the first die and the punch, and thereby, the panel-like formed product is produced.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: September 1, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kenichiro Otsuka, Yoshiaki Nakazawa
  • Patent number: 10744832
    Abstract: A control arm includes a pair of mounting portions provided separately from each other and a main body portion extending in a X-direction and connecting the pair of mounting portions. At a cross-section perpendicular to the X-direction at a position along the X-direction, the main body portion includes: a first V-shaped member having a first apex and opening from the first apex in a V-shape toward one side in a Y-direction, and a second V-shaped member having a second apex and opening from the second apex in a V-shape toward the other side in the Y-direction. At the cross-section, the first apex and the second apex are joined. At a cross-section perpendicular to the X-direction at the center position of the main body portion in the X-direction, an opening angle of the first V-shaped member and an opening angle of the second V-shaped member are each no more than 150°.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: August 18, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Yujiro Tatsumi, Kenichiro Otsuka, Yoshiaki Nakazawa, Masanori Yasuyama, Hitoshi Sakuma, Ayaka Musha
  • Patent number: 10717123
    Abstract: A method for manufacturing the structural member (1), the method including: a first step in which the pad (15, 15A, 15B, 15C, 21) presses the forming material (16) against the punch (13) to raise a portion corresponding to a flange to be formed in ends of at least the gutter bottom (2) and the ridge (3a, 3b) in a direction opposite to the pressing direction, the pad (15, 15A, 15B, 15C, 21) bends an end of a portion to be formed into the ridge (3a, 3b) in the pressing direction and restrains at least a part of the end, and the punch (13) and the die (14) carry out press forming to form an intermediate product while a region other than an end in a portion to be formed into the gutter bottom (2) remains unrestrained.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: July 21, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Yasuhiro Ito, Ryuichi Nishimura, Kenichiro Otsuka, Yoshiaki Nakazawa
  • Patent number: 10695815
    Abstract: A press-formed product is shaped by press-working from a tailored blank made up of a plurality of metal sheets butt-welded together. The press-formed product includes a flange section, and an arc-shaped area which is an area of the flange section which is formed by stretch flange deformation, and in which an inner peripheral edge is open. A weld line of the tailored blank intersects with the inner peripheral edge and an outer peripheral edge of the arc-shaped area. An angle ? formed by the weld line and a maximum principal strain direction of the stretch flange deformation is 17 to 84°.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: June 30, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Masahiro Saito, Yoshiaki Nakazawa, Kenichiro Otsuka, Yasuhiro Ito, Masanori Yasuyama, Masatoshi Tokunaga
  • Patent number: 10682681
    Abstract: A press forming apparatus includes: a punch; a blank holder disposed adjacent to the punch; a die being a counterpart of the punch; and a pad disposed to face the punch. The punch has a tip surface, an outside surface, and a stepped surface having shapes corresponding to a web portion, vertical wall portions, and a flange portion of a product, respectively. When the punch and the die are relatively moved in a pressing direction in a state where a middle portion in a width direction of a workpiece is sandwiched by the pad and punch and an outer peripheral portion in the width direction of the workpiece is bound by the blank holder and the die, the workpiece's outer peripheral portion in the width direction gets out from between the blank holder and the die, and the flange portion is shaped by the die and the punch's stepped surface.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: June 16, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Ryuichi Nishimura, Kenichiro Otsuka, Keiji Ogawa, Yoshiaki Nakazawa
  • Patent number: 10682902
    Abstract: The panel-like formed product includes a polygonal top board, two or more vertical walls, and a flange. The vertical walls extend from two or more sides of the top board, and include at least two adjacent vertical walls extending from at least two adjacent sides of the top board. The top board includes a frame portion, and a concave portion which is located at an inner side of the frame portion. The two or more adjacent vertical walls include a first vertical wall section, a stair, and a second vertical wall section. The stair connects to a lower end of the first vertical wall section. The second vertical wall section connects to an outer edge of the stair. The flange connects to a lower end of the second vertical wall section.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: June 16, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kenichiro Otsuka, Yoshiaki Nakazawa, Takeshi Kawachi, Yoshiyuki Kaseda
  • Patent number: 10677996
    Abstract: An optical connector according to an exemplary embodiment is an optical connector including a plurality of optical connector plugs collectively connected to each of a plurality of adapters arranged along a first direction and a second direction intersecting the first direction, along a connection direction intersecting both the first direction and the second direction, the optical connector includes: a plurality of holders configured to be arranged along the second direction while holding the plurality of optical connector plugs arranged in the first direction, and a handle configured to hold the plurality of holders arranged in the second direction.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: June 9, 2020
    Assignees: SEI OPTIFRONTIER CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yohei Aoshima, Tomoyuki Yokokawa, Tsuneari Ito, Kenichiro Otsuka
  • Publication number: 20200132941
    Abstract: An optical connector is disclosed. The optical connector includes a rear housing, an inner housing, an arm and an outer housing. The inner housing includes at least one retaining hole to house a ferrule. The rear housing moves linearly and rotates with respect to the inner housing. The arm moves linearly together with the rear housing with respect to the inner housing. The outer housing disposed on an outer periphery of the inner housing covers a front portion of the inner housing. The outer housing rotates with respect to the inner housing by a rotation guiding mechanism cooperating with the arm. The outer housing includes a forward wall covering the distal end of the inner housing. An opening area of the forward wall can be aligned with the retaining hole of the ferrule when the outer housing is rotated from an initial position to a connected position.
    Type: Application
    Filed: September 24, 2019
    Publication date: April 30, 2020
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., Japan Communication Accessories Manufacturing Co., Ltd.
    Inventors: Kenichiro OTSUKA, Motoyoshi KIMURA, Masaki OMURA, Steve CHENG