Patents by Inventor Shuji Yoshitsune

Shuji Yoshitsune 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: 10344865
    Abstract: A sealing device has a seal ring, a first backup ring and a second backup ring. The first backup ring is formed into a triangular cross section while having an axially vertical end surface portion, a cylindrical peripheral surface portion, and an inclined surface portion intersecting the end surface portion and the peripheral surface portion. The second backup ring is formed into a triangular cross section while having an axially vertical end surface portion, a cylindrical peripheral surface portion, and an inclined surface portion in correspondence to the inclined surface portion of the first backup ring. A cut portion is provided in a corner portion where the end surface portion and the inclined surface portion in the first backup ring intersect, and a corner portion where the peripheral surface portion and the inclined surface portion in the second backup ring intersect.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: July 9, 2019
    Assignee: NOK Corporation
    Inventors: Kota Henmi, Makoto Hatano, Shuji Yoshitsune
  • Publication number: 20180372223
    Abstract: A sealing device in which diameter expansion of an inserted first back-up ring is suppressed. The sealing device includes a seal ring mounted in a rectangular mounting groove, the first back-up ring, and a second back-up ring. The first back-up ring has an end surface contacting an opposing-sealing-fluid-side side surface of the mounting groove. The second back-up ring has an end surface contacting the seal ring. A contact surface in an inner peripheral end of second back-up ring is perpendicular to the axis to contact an opposing-sealing-fluid-side side surface of the mounting groove. The inner diameter of the first back-up ring is set to be larger than the outer diameter of the contact surface portion of the second back-up ring, and the outer diameter of the first back-up ring is set to be smaller than the inner diameter of a housing.
    Type: Application
    Filed: October 31, 2016
    Publication date: December 27, 2018
    Applicant: NOK CORPORATION
    Inventors: Shuji YOSHITSUNE, Kota HENMI
  • Patent number: 10107401
    Abstract: A sealing structure suppresses possible damage to a seal ring because of a backup ring. The sealing structure is characterized in that a cut portion 150 that is cut in a planar shape is formed in a backup ring 100 at one position in a circumferential direction, the cut portion 150 is configured such that a cut surface 153 is oblique to a central axis of the backup ring 100, an acute angle of angles between a surface on the high pressure side of the backup ring 100 and the cut surface 153 is set to not less than 15° and not more than 30°, and the backup ring 100 is formed of a resin material having Rockwell hardness of 100 or less, durometer hardness of 70 or less, and elastic modulus of 1.0 GPa or less.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: October 23, 2018
    Assignee: NOK CORPORATION
    Inventors: Hiroaki Monma, Mitsuo Watanabe, Shuji Yoshitsune, Kota Henmi
  • Publication number: 20170292607
    Abstract: A sealing structure suppresses possible damage to a seal ring because of a backup ring. The sealing structure is characterized in that a cut portion 150 that is cut in a planar shape is formed in a backup ring 100 at one position in a circumferential direction, the cut portion 150 is configured such that a cut surface 153 is oblique to a central axis of the backup ring 100, an acute angle of angles between a surface on the high pressure side of the backup ring 100 and the cut surface 153 is set to not less than 15° and not more than 30°, and the backup ring 100 is formed of a resin material having Rockwell hardness of 100 or less, durometer hardness of 70 or less, and elastic modulus of 1.0 GPa or less.
    Type: Application
    Filed: August 28, 2015
    Publication date: October 12, 2017
    Applicant: NOK CORPORATION
    Inventors: Hiroaki MONMA, Mitsuo WATANABE, Shuji YOSHITSUNE, Kota HENMI
  • Publication number: 20160356381
    Abstract: A sealing device has a seal ring, a first backup ring and a second backup ring. The first backup ring is formed into a triangular cross section while having an axially vertical end surface portion, a cylindrical peripheral surface portion, and an inclined surface portion intersecting the end surface portion and the peripheral surface portion. The second backup ring is formed into a triangular cross section while having an axially vertical end surface portion, a cylindrical peripheral surface portion, and an inclined surface portion in correspondence to the inclined surface portion of the first backup ring. A cut portion is provided in a corner portion where the end surface portion and the inclined surface portion in the first backup ring intersect, and a corner portion where the peripheral surface portion and the inclined surface portion in the second backup ring intersect.
    Type: Application
    Filed: March 6, 2015
    Publication date: December 8, 2016
    Inventors: Kota HENMI, Makoto HATANO, Shuji YOSHITSUNE
  • Patent number: 9500166
    Abstract: Provided is an intake noise reduction device that can suppress an occurrence of noise in an intake pipe. An intake noise reduction device (100) disposed on a downstream side of a throttle valve in an intake pipe and including a flow-guiding net (110) that guides an air flow, wherein the flow-guiding net includes a mesh that is configured to be fine in a vicinity of a center of a flow passage in the intake pipe and to become coarser with distance from the vicinity of the center. For example, the mesh flow-guiding net (110) is formed of a plurality of radial portions (111) extending radially outward from the vicinity of the center of the flow passage in the intake pipe and a plurality of concentric portions (112) provided concentrically from the vicinity of the center.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: November 22, 2016
    Assignee: NOK CORPORATION
    Inventors: Shuji Yoshitsune, Shigeru Watanabe, Masahiko Inoue, Norimasa Hosonuma
  • Publication number: 20160010603
    Abstract: Provided is an intake noise reduction device that can suppress an occurrence of noise in an intake pipe. An intake noise reduction device (100) disposed on a downstream side of a throttle valve in an intake pipe and including a flow-guiding net (110) that guides an air flow, wherein the flow-guiding net includes a mesh that is configured to be fine in a vicinity of a center of a flow passage in the intake pipe and to become coarser with distance from the vicinity of the center. For example, the mesh flow-guiding net (110) is formed of a plurality of radial portions (111) extending radially outward from the vicinity of the center of the flow passage in the intake pipe and a plurality of concentric portions (112) provided concentrically from the vicinity of the center.
    Type: Application
    Filed: February 28, 2014
    Publication date: January 14, 2016
    Applicant: NOK CORPORATION
    Inventors: Shuji YOSHITSUNE, Shigeru WATANABE, Masahiko INOUE, Norimasa HOSONUMA
  • Patent number: 9027936
    Abstract: A gasket is provided which is intended to improve its sealing performance by attaining a further stabilization of the posture thereof in a groove.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: May 12, 2015
    Assignees: Nok Corporation, Mahle Filter Systems Japan Corporation
    Inventors: Shuji Yoshitsune, Masaru Ito, Tomoyuki Koyama, Seiji Tani
  • Patent number: 8136819
    Abstract: There is provided a sealing structure and a gasket which can seal both of a portion where a groove for mounting the gasket is formed and a portion where a groove for mounting the gasket is not formed when the portions are connected. The gasket includes a first gasket portion 110 which has a first mounted portion 111 to be mounted in a first groove 211 to come in close contact with a bottom face 211a of the first groove 211 and which is formed in a shape along an end portion of an outer wall portion 210 and a second gasket portion 120 which has a second mounted portion 150 to be mounted in a second groove 221 near a portion connected to the first gasket portion 110 and which is formed in a shape along an end portion 220 of a partition wall 220, the second mounted portion 150 having an inclined face for coming in close contact with the inclined bottom face 221a of the second groove 221.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: March 20, 2012
    Assignees: Nok Corporation, MAHLE Filter Systems Japan Corporation
    Inventors: Shuji Yoshitsune, Kiyohiro Suzuki, Manshu Kameike, Seiji Tani, Hideki Tanaka, Shin Yoshida, Masanori Sudo
  • Publication number: 20110193298
    Abstract: A gasket is provided which is intended to improve its sealing performance by attaining a further stabilization of the posture thereof in a groove.
    Type: Application
    Filed: July 23, 2009
    Publication date: August 11, 2011
    Applicants: NOK CORPORATION, MAHLE Filter Systems Japan Corporation
    Inventors: Shuji YOSHITSUNE, Masaru Ito, Tomoyuki Koyama, Seiji Tani
  • Patent number: 7938406
    Abstract: A first gasket 10 is placed in a groove formed in a cam cover and seals a gap between a cylinder head and the cam cover. The first gasket 10 includes a pair of seal lips 13 which come into tight contact with the cylinder head and which are provided in parallel to each other, and a plurality of connecting portions 15 which are provided between the pair of seal lips 13, which are connected to each of the seal lips 13, and which hold a distance between the seal lips 13 near the connected portion.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: May 10, 2011
    Assignee: NOK Corporation
    Inventors: Tomohisa Matsumoto, Takashi Nakao, Shuji Yoshitsune, Kazuki Takeno
  • Patent number: 7762559
    Abstract: A gasket in an integrated double-layered structure comprising an outer layer and an inner layer enclosed by the outer layer, in which the outer layer is a low-hardness rubber layer having a JIS A hardness of 40-70, and the inner layer is a high-hardness rubber layer having a JIS A hardness of 80-100, where a ratio h/h0 of height h of the inner layer to height h0 of the outer layer is preferably 0.3-0.8, and ratio d/d0 of height d of the inner layer to width d0 of the outer layer is preferably 0.5-0.8 in the longitudal cross-section as view from the width direction of the gasket, has a low reaction force, and distinguished sealability and insertibility, and used as inserted between two members, one of which has a groove for insertion.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: July 27, 2010
    Assignee: NOK Corporation
    Inventors: Kiyohiro Suzuki, Manshu Kameike, Shuji Yoshitsune, Takashi Nakao
  • Publication number: 20100123292
    Abstract: A gasket has an annular metallic frame, and a seal portion made of an elastic material which extends annularly along an inner peripheral portion of the metallic frame, and which is connected to the metallic frame. The metallic frame has a penetration hole through which a shaft portion of a bolt that fastens two surfaces of an appliance that faces each other penetrates, and a seat surface-corresponding portion that is formed around the penetration hole, and that corresponds to a seat surface of the bolt.
    Type: Application
    Filed: November 20, 2009
    Publication date: May 20, 2010
    Applicants: Toyota Jidosha Kabushiki Kaisha, Aisin AW Co., Ltd., Nok Corporation
    Inventors: Masamitsu Seno, Yutaka Hotta, Shuji Yoshitsune
  • Publication number: 20100102519
    Abstract: There is provided a sealing structure and a gasket which can seal both of a portion where a groove for mounting the gasket is formed and a portion where a groove for mounting the gasket is not formed when the portions are connected. The gasket includes a first gasket portion 110 which has a first mounted portion 111 to be mounted in a first groove 211 to come in close contact with a bottom face 211a of the first groove 211 and which is formed in a shape along an end portion of an outer wall portion 210 and a second gasket portion 120 which has a second mounted portion 150 to be mounted in a second groove 221 near a portion connected to the first gasket portion 110 and which is formed in a shape along an end portion 220 of a partition wall 220, the second mounted portion 150 having an inclined face for coming in close contact with the inclined bottom face 221a of the second groove 221.
    Type: Application
    Filed: March 12, 2008
    Publication date: April 29, 2010
    Applicants: NOK CORPORATION, MAHLE FILTER SYSTEMS JAPAN CORPORATION
    Inventors: Shuji Yoshitsune, Kiyohiro Suzuki, Manshu Kameike, Seiji Tani, Hideki Tanaka, Shin Yoshida, Masanori Sudo
  • Publication number: 20100044970
    Abstract: A gasket in an integrated double-layered structure comprising an outer layer and an inner layer enclosed by the outer layer, in which the outer layer is a low-hardness rubber layer having a JIS A hardness of 40-70, and the inner layer is a high-hardness rubber layer having a JIS A hardness of 80-100, where a ratio h/h0 of height h of the inner layer to height h0 of the outer layer is preferably 0.3-0.8, and ratio d/d0 of height d of the inner layer to width d0 of the outer layer is preferably 0.5-0.8 in the longitudal cross-section as view from the width direction of the gasket, has a low reaction force, and distinguished sealability and insertibility, and used as inserted between two members, one of which has a groove for insertion.
    Type: Application
    Filed: April 13, 2006
    Publication date: February 25, 2010
    Inventors: Kiyohiro Suzuki, Manshu Kameike, Shuji Yoshitsune, Takashi Nakao
  • Publication number: 20090115138
    Abstract: A first gasket 10 is placed in a groove formed in a cam cover and seals a gap between a cylinder head and the cam cover. The first gasket 10 includes a pair of seal lips 13 which come into tight contact with the cylinder head and which are provided in parallel to each other, and a plurality of connecting portions 15 which are provided between the pair of seal lips 13, which are connected to each of the seal lips 13, and which hold a distance between the seal lips 13 near the connected portion.
    Type: Application
    Filed: July 5, 2006
    Publication date: May 7, 2009
    Applicant: NOK Corporation
    Inventors: Tomohisa Matsumoto, Takashi Nakao, Shuji Yoshitsune, Kazuki Takeno
  • Publication number: 20060226610
    Abstract: In a gasket for sealing a gap between a throttle body and an intake manifold that are assembled obliquely to each other, sealing performance is stabilized by preventing the gasket from falling or being caught. A gasket (1) with a substantially pentagonal cross-section is set in an installation groove (21) before a throttle body (20) and an intake manifold (30) are assembled. The gasket (1) is then brought to be in contact only with a close-contact surface (31) of the intake manifold, to which surface, with a throttle body (20) assembled to an intake manifold (30), the gasket (1) in the installation groove is in close contact. After that the throttle body (20) is assembled to the intake manifold (30) by making the gasket (1) to be in sliding contact with the close-contact surface (31).
    Type: Application
    Filed: June 10, 2004
    Publication date: October 12, 2006
    Inventors: Takashi Nakao, Shuji Yoshitsune, Yoshiaki Yamamoto, Masao Ino