Patents by Inventor Isao Tanji

Isao Tanji 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: 11499635
    Abstract: An upper gasket member includes an upper base portion of an annular flat plate, an upper outer periphery portion diagonally extending to an upper side from an outer periphery edge portion of the upper base portion, and an upper outer periphery side annular portion of an annular flat plate extending in an extension direction of the upper base portion from an outer periphery edge portion of the upper outer periphery portion. Further, a lower gasket member includes a lower base portion of an annular flat plate, a lower outer periphery portion diagonally extending to a lower side from an outer periphery edge portion of the lower base portion, and a lower outer periphery side annular portion of an annular flat plate extending in an extension direction of the lower base portion from an outer periphery edge portion of the lower outer periphery portion.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: November 15, 2022
    Assignee: NOK CORPORATION
    Inventors: Kazuya Aihara, Isao Tanji
  • Publication number: 20220178445
    Abstract: A gasket, to be installed between a first housing and a second housing, includes a first loop-shaped portion in a loop shape, a second loop-shaped portion in a loop shape that is positioned at a radially inner side of the first loop-shaped portion, with a first gap between the first loop-shaped portion and the second loop-shaped portion, and a first connector portion connecting the first loop-shaped portion and the second loop-shaped portion in a part of the first gap.
    Type: Application
    Filed: May 12, 2020
    Publication date: June 9, 2022
    Inventors: Takeshi WATANABE, Tokunori YANAGI, Isao TANJI
  • Patent number: 11333247
    Abstract: A metal gasket includes: a straight section provided with a bolt hole; a bead section raised from an inner peripheral edge of the straight section toward one side of the direction of the thickness of the gasket; and a bent section bent from an outer peripheral edge of the straight section toward the other side of the direction of the thickness of the gasket. When metal gasket is compressively sandwiched by a pair of housings, bead section elastically deforms to decrease height, and straight section elastically deforms, whereby the inner peripheral edge of the straight section contacts one of the housings, the outer peripheral edge of the straight section contacts the other housing, and the bent section contacts the one of the housings. A gasket installation determination projection is part of the periphery and provided on the outer peripheral edge of the bent section or of the straight section.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: May 17, 2022
    Assignee: NOK CORPORATION
    Inventors: Takeshi Watanabe, Kazuya Aihara, Isao Tanji, Shinya Nakaoka, Ryoko Saito
  • Patent number: 11248704
    Abstract: A metal gasket exhibiting an excellent seal effect on external foreign matter, such as salt water, and having low reaction force when required sealing pressure is low. The metal gasket, which is sandwiched between a pair of housings to seal the internal space of the housings and prevent entrance of external foreign matter between the housing and the gasket, has a straight portion, where the entire surface from an inner peripheral edge portion to an outer peripheral edge portion is a planar shape. A bent bead portion, directed obliquely outward and contacting one of the housings, is integrally provided in the outer peripheral edge portion of the straight portion. The bent bead portion functions as both an inward seal sealing the internal space and an outward seal preventing the entrance of external foreign matter between the housing and the gasket.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: February 15, 2022
    Assignee: NOK CORPORATION
    Inventors: Isao Tanji, Takeshi Watanabe, Kazuya Aihara
  • Publication number: 20200240520
    Abstract: An upper gasket member includes an upper base portion of an annular flat plate, an upper outer periphery portion diagonally extending to an upper side from an outer periphery edge portion of the upper base portion, and an upper outer periphery side annular portion of an annular flat plate extending in an extension direction of the upper base portion from an outer periphery edge portion of the upper outer periphery portion. Further, a lower gasket member includes a lower base portion of an annular flat plate, a lower outer periphery portion diagonally extending to a lower side from an outer periphery edge portion of the lower base portion, and a lower outer periphery side annular portion of an annular flat plate extending in an extension direction of the lower base portion from an outer periphery edge portion of the lower outer periphery portion.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Applicant: NOK CORPORATION
    Inventors: Kazuya AIHARA, Isao TANJI
  • Patent number: 10670032
    Abstract: It is an object of the present invention to provide a sealing structure for a casing that can reduce the number of used gaskets and achieve further weight reduction, with the sealing function of the gaskets secured. The object is solved by including: a case 2 having an opened top; a cover 3 attached to the top of the case 2 to form a fluid flow path therein; a center plate 5 interposed between the case 2 and the cover 3 and partitions an inner space into the side of the case 2 and the side of the cover 3; and a gasket 4, which is disposed between the case 2 and the cover 3, and forming the center plate 5 so as to have a size that is within an inner peripheral side relative to a sealing line 41 of the gasket 4 and stacking this center plate on the gasket 4, and attaching the cover 3 to the top of the case 2 with the stacked gasket 4 and center plate 5 sandwiched there between to compress the gasket 4 with the mutual butting surfaces between the case 2 and the cover 3.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: June 2, 2020
    Assignee: NOK CORPORATION
    Inventors: Kazuya Aihara, Shinya Nakaoka, Isao Tanji
  • Publication number: 20200063882
    Abstract: A valve seat is provided on the side of a thermo housing of a thermostat device. A valve body is provided on the side of a thermoelement that is a movable body of the thermostat device. The valve seat is formed of a laminated component of a rubber layer deposited on the surface of a metal plate. The valve body is formed of a metallic component with no rubber layer deposited thereon, and then the valve body is configured to be able to come into and out of contact with the rubber layer of the valve seat.
    Type: Application
    Filed: April 4, 2018
    Publication date: February 27, 2020
    Inventors: Ryota TAKAGI, Isao TANJI
  • Publication number: 20200032904
    Abstract: Provided is a gasket formed by coating rubber on both surfaces of a metal plate. In order to suppress stress relaxation, the gasket is provided with: a base formed by a flat plate-like metal member; and a seal portion including as a base body a seal base that is formed to a thickness smaller than that of the base and formed by a flat plate-like metal member having a rubber-like elastic material layer on a surface thereof. The seal portion is provided with a bead formed in a bent shape. The base and the seal portion are formed in, for example, annular shapes having different diameters. The base and the seal portion are coupled to each other by a coupling portion in such a way that the base and the seal base are positioned in the same plane and that the bead protrudes from a plane including at least one surface of the base.
    Type: Application
    Filed: January 26, 2018
    Publication date: January 30, 2020
    Inventors: Isao TANJI, Shinya NAKAOKA
  • Patent number: 10544794
    Abstract: The present invention has an object of providing a sealing structure for a casing that suppresses the deformation of a center plate of a laminated gasket on a partition wall and ensures the compression amount of a bead on the partition wall, without the center plate being thickened.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: January 28, 2020
    Assignee: NOK CORPORATION
    Inventors: Kazuya Aihara, Shinya Nakaoka, Isao Tanji
  • Patent number: 10520088
    Abstract: The present invention addresses the problem of providing: a metal gasket capable of limiting the loss of axial bolt fastening force even if a peripheral creased section is formed as an anti-saline intrusion measure; and a metal gasket, which has relatively small curved sections with a radius of curvature of not more than 20 mm on the outer edge and which is capable of limiting loss of axial bolt fastening force even when a peripheral creased section is formed over the entire perimeter of the metal gasket as an anti-saline intrusion measure. Said problem is solved by a metal gasket, which is disposed between the abutting surfaces of two members and has, on a metal base plate: bolt holes into which bolts are inserted; a bead that is to the inside of the bolt holes and is for sealing between the abutting surfaces; and a peripheral creased section configured by bending the perimeter of the metal base plate in one direction so that no gap in which saline can accumulate is formed between the abutting surfaces.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: December 31, 2019
    Assignee: NOK CORPORATION
    Inventors: Takeshi Watanabe, Ryoko Saito, Isao Tanji, Shinya Nakaoka
  • Patent number: 10371160
    Abstract: It is an object of the present invention to provide a sealing structure for a casing that can reduce the number of used gaskets and achieve further weight reduction, with the sealing function of the gaskets secured. The object is solved by including: a case 2 having an opened top; a cover 3 attached to the top of the case 2 to form a fluid flow path therein; a center plate 5 interposed between the case 2 and the cover 3 and partitions an inner space into the side of the case 2 and the side of the cover 3; and a gasket 4, which is disposed between the case 2 and the cover 3, and forming the center plate 5 so as to have a size that is within an inner peripheral side relative to a sealing line 41 of the gasket 4 and stacking this center plate on the gasket 4, and attaching the cover 3 to the top of the case 2 with the stacked gasket 4 and center plate 5 sandwiched there between to compress the gasket 4 with the mutual butting surfaces between the case 2 and the cover 3.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: August 6, 2019
    Assignee: NOK Corporation
    Inventors: Kazuya Aihara, Shinya Nakaoka, Isao Tanji
  • Publication number: 20190072101
    Abstract: It is an object of the present invention to provide a sealing structure for a casing that can reduce the number of used gaskets and achieve further weight reduction, with the sealing function of the gaskets secured. The object is solved by including: a case 2 having an opened top; a cover 3 attached to the top of the case 2 to form a fluid flow path therein; a center plate 5 interposed between the case 2 and the cover 3 and partitions an inner space into the side of the case 2 and the side of the cover 3; and a gasket 4, which is disposed between the case 2 and the cover 3, and forming the center plate 5 so as to have a size that is within an inner peripheral side relative to a sealing line 41 of the gasket 4 and stacking this center plate on the gasket 4, and attaching the cover 3 to the top of the case 2 with the stacked gasket 4 and center plate 5 sandwiched there between to compress the gasket 4 with the mutual butting surfaces between the case 2 and the cover 3.
    Type: Application
    Filed: November 7, 2018
    Publication date: March 7, 2019
    Applicant: NOK Corporation
    Inventors: Kazuya AIHARA, Shinya NAKAOKA, Isao TANJI
  • Publication number: 20180347699
    Abstract: A metal gasket exhibiting an excellent seal effect on external foreign matter, such as salt water, and having low reaction force when required sealing pressure is low. The metal gasket, which is sandwiched between a pair of housings to seal the internal space of the housings and prevent entrance of external foreign matter between the housing and the gasket, has a straight portion, where the entire surface from an inner peripheral edge portion to an outer peripheral edge portion is a planar shape. A bent bead portion, directed obliquely outward and contacting one of the housings, is integrally provided in the outer peripheral edge portion of the straight portion. The bent bead portion functions as both an inward seal sealing the internal space and an outward seal preventing the entrance of external foreign matter between the housing and the gasket.
    Type: Application
    Filed: December 9, 2016
    Publication date: December 6, 2018
    Applicant: NOK CORPORATION
    Inventors: Isao TANJI, Takeshi WATANABE, Kazuya AIHARA
  • Publication number: 20180335142
    Abstract: A metal gasket includes: a straight section provided with a bolt hole; a bead section raised from an inner peripheral edge of the straight section toward one side of the direction of the thickness of the gasket; and a bent section bent from an outer peripheral edge of the straight section toward the other side of the direction of the thickness of the gasket. When metal gasket is compressively sandwiched by a pair of housings, bead section elastically deforms to decrease height, and straight section elastically deforms, whereby the inner peripheral edge of the straight section contacts one of the housings, the outer peripheral edge of the straight section contacts the other housing, and the bent section contacts the one of the housings. A gasket installation determination projection is part of the periphery and provided on the outer peripheral edge of the bent section or of the straight section.
    Type: Application
    Filed: November 25, 2016
    Publication date: November 22, 2018
    Applicant: NOK CORPORATION
    Inventors: Takeshi WATANABE, Kazuya AIHARA, Isao TANJI, Shinya NAKAOKA, Ryoko SAITO
  • Patent number: 9885418
    Abstract: In a tabular metal gasket having a plurality of bolt holes, a seal bead is provided between bolt holes which are adjacent to each other, one end of the seal bead is connected to the one bolt hole and the other end of the seal bead is connected to the other bolt hole. The seal bead is formed into a gradually changing shape in which a width is the narrowest at the center portion between the bolt holes and the width is gradually enlarged from the center portion between the bolt holes toward the bolt holes, and satisfies the following expression (a): D>d?W1 in which D is a diameter of a head seat surface of a fastening bolt which is inserted into the bolt hole, d is a diameter of the bolt hole, and W1 is the maximum width of the seal bead.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: February 6, 2018
    Assignee: NOK Corporation
    Inventors: Takeshi Watanabe, Isao Tanji, Shinya Nakaoka
  • Publication number: 20180023705
    Abstract: The present invention addresses the problem of providing: a metal gasket capable of limiting the loss of axial bolt fastening force even if a peripheral creased section is formed as an anti-saline intrusion measure; and a metal gasket, which has relatively small curved sections with a radius of curvature of not more than 20 mm on the outer edge and which is capable of limiting loss of axial bolt fastening force even when a peripheral creased section is formed over the entire perimeter of the metal gasket as an anti-saline intrusion measure. Said problem is solved by a metal gasket, which is disposed between the abutting surfaces of two members and has, on a metal base plate: bolt holes into which bolts are inserted; a bead that is to the inside of the bolt holes and is for sealing between the abutting surfaces; and a peripheral creased section configured by bending the perimeter of the metal base plate in one direction so that no gap in which saline can accumulate is formed between the abutting surfaces.
    Type: Application
    Filed: December 3, 2015
    Publication date: January 25, 2018
    Applicant: NOK Corporation
    Inventors: Takeshi WATANABE, Ryoko SAITO, Isao TANJI, Shinya NAKAOKA
  • Publication number: 20180003300
    Abstract: The present invention addresses the problem of enabling an amount of compression of a bead part to be ensured and sealing properties to be improved in a gasket that is supported on one side with a bolt hole provided only on one side of the bead part. A gasket (1) is provided that has an opening (103) to be sealed, a bead part (12) provided along a circumference of the opening (103), and a bolt hole arranged on one side of the bead part (12). The gasket (1) is arranged between a case (101) and a cover (102) and is fastened with a bolt to seal the opening (103) while being supported on one side by the bolt (200). A height adjusting part (14) is provided in a side edge portion (1a) that is located on the opposite side of the bolt hole from the bead part (12). The height adjusting part (14) regulates a gap between the case (101) and the cover (102) during fastening with the bolt and serves as a fulcrum to press the cover (102) into contact with the bead part (12).
    Type: Application
    Filed: January 13, 2016
    Publication date: January 4, 2018
    Applicant: NOK Corporation
    Inventors: Takeshi WATANABE, Isao TANJI, Shinya NAKAOKA
  • Patent number: 9841103
    Abstract: An object is to provide a metal gasket that can form a wide contact width for a counterpart sealing face and that can achieve excellent sealing properties even when a blow hole is generated in the counterpart sealing face, and the object is achieved by a metal gasket having a bead portion to be in contact with a counterpart sealing face to form a sealing portion, formed on a gasket main body. The bead portion includes an arc portion that is convex toward the counterpart sealing face and hem-rising portions that each obliquely rise from the gasket main body toward the arc portion, on both hems of the arc portion. A connection portion between the arc portion and the hem-rising portion is formed to be convex toward a convex side of the bead portion. Plastic distortion for an overall width of the arc portion is lower than that of the connection portion. A contact pressure distribution in the arc portion in a compression state has a shape that is flat and wide in a width direction of the arc portion.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: December 12, 2017
    Assignee: NOK Corporation
    Inventors: Takeshi Watanabe, Kazuya Aihara, Isao Tanji, Shinya Nakaoka
  • Publication number: 20170343000
    Abstract: It is an object of the present invention to provide a sealing structure for a casing that can reduce the number of used gaskets and achieve further weight reduction, with the sealing function of the gaskets secured. The object is solved by including: a case 2 having an opened top; a cover 3 attached to the top of the case 2 to form a fluid flow path therein; a center plate 5 interposed between the case 2 and the cover 3 and partitions an inner space into the side of the case 2 and the side of the cover 3; and a gasket 4, which is disposed between the case 2 and the cover 3, and forming the center plate 5 so as to have a size that is within an inner peripheral side relative to a sealing line 41 of the gasket 4 and stacking this center plate on the gasket 4, and attaching the cover 3 to the top of the case 2 with the stacked gasket 4 and center plate 5 sandwiched there between to compress the gasket 4 with the mutual butting surfaces between the case 2 and the cover 3.
    Type: Application
    Filed: October 15, 2015
    Publication date: November 30, 2017
    Applicant: NOK Corporation
    Inventors: Kazuya AIHARA, Shinya NAKAOKA, Isao TANJI
  • Publication number: 20170314564
    Abstract: The present invention has an object of providing a sealing structure for a casing that suppresses the deformation of a center plate of a laminated gasket on a partition wall and ensures the compression amount of a bead on the partition wall, without the center plate being thickened.
    Type: Application
    Filed: October 15, 2015
    Publication date: November 2, 2017
    Applicant: NOK Corporation
    Inventors: Kazuya AIHARA, Shinya NAKAOKA, Isao TANJI