Patents Assigned to Tokai Rubber Industries, Ltd.
  • Publication number: 20090020678
    Abstract: An exhaust pipe support including an elastic body having a ring shape, the elastic body comprising: an upper attachment portion having an upper attachment hole; a lower attachment portion having a lower attachment hole; and a pair of arm portions mutually connecting the upper and lower attachment portion. A first reinforcement rib is integrally formed on each outer circumferential surface of the arm portions. An upper end thereof is located at a higher position than a connecting position of an inner circumferential surface of the arm portion and the upper attachment portion and at a higher position than the center of the upper attachment hole, while a lower end thereof is located at a lower position than a connecting position of the inner circumferential surface of the arm portion and the lower attachment portion and at a lower position than the center of the lower attachment hole.
    Type: Application
    Filed: May 27, 2008
    Publication date: January 22, 2009
    Applicant: Tokai Rubber Industries, Ltd.
    Inventors: Hiroki Miyata, Takanobu Nanno
  • Patent number: 7478652
    Abstract: A fuel hose has multilayered construction and a flexible corrugated portion with corrugation bottom portions and corrugation peak portions. The fuel hose includes a rubber layer and a resin layer that is a laminated on an inner side of the rubber layer. The resin layer has fuel permeation resistance and serves as a barrier layer. The corrugated portion satisfies a condition of H/W?1.1 when H represents a height of the corrugation measured between an inside of the corrugation bottom portion and an inside of the corrugation peak portion thereof, and 2W represents an axial distance between an inside of the corrugation bottom portion and an inside of an adjacent corrugation bottom portion.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: January 20, 2009
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Kazushige Sakazaki, Koji Hioki
  • Patent number: 7478653
    Abstract: A resin composite fuel hose of a multilayer construction includes a resin layer as a barrier layer having a fuel permeation resistance, an inner rubber layer as an inner surface layer laminated on an inner side of the resin layer and an outer rubber layer laminated on an outer side of the resin layer. The outer rubber layer has a rubber hardness degree equal to or greater than that of the inner rubber layer, and the inner rubber layer has a permanent elongation equal to or less than 90%.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: January 20, 2009
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Kazushige Sakazaki, Hiroyoshi Mori, Shinji Iio
  • Publication number: 20090015270
    Abstract: An object of the present invention is to provide an electrostatic capacity-type sensor which is excellent in durability and can detect bending-deformation. An electrostatic capacity-type sensor comprises a dielectric film made of an elastomer and a pair of electrodes arranged via the dielectric film, and detects the deformation based on a change in the electrostatic capacity between the pair of electrodes. The pair of electrodes have an elastomer and a conductive filler blended in said elastomer, and are expansible/contractible depending on the deformation of the dielectric film, and exhibit a small change in the conductivity even when expanded and contracted.
    Type: Application
    Filed: June 3, 2008
    Publication date: January 15, 2009
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Tomonori Hayakawa, Kazunobu Hashimoto
  • Publication number: 20090008201
    Abstract: A vibration damping device including a hollow housing having a fastening frame and a housing main body attached to the fastening frame for providing the hollow housing enclosing a mass member. With the housing main body inserted between top and base plate portions through an opening in the fastening frame, an urging force of a first spring projection is directed against the housing main body from one of the top base plate portions towards the other thereby holding the housing main body pressed against the other of the top and base plate portions, while an urging force of a second spring projection is directed against the housing main body towards the opening side from a back plate portion causing the housing main body to become engaged by a catch projection, for attaching the housing main body to the fastening frame and preventing it from slipping out through the opening of the fastening frame.
    Type: Application
    Filed: July 3, 2008
    Publication date: January 8, 2009
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Koichi Hasegawa, Atsushi Muramatsu
  • Publication number: 20090008845
    Abstract: A pneumatic actuator for use in a vibration damping device comprising: a base housing; an elastic wall member being fastened fluid-tightly to the base housing to form a working air chamber therebetween; and an urging member positioned within the working air chamber for exerting urging force on an output portion provided to the elastic wall member, such that the output portion is actuated to undergo displacement in opposition to the urging member through change in an air pressure in the working air chamber from an outside. At least one of opposing faces of the base housing and the elastic wall member on the working air chamber side thereof has a plurality of rib portions which extend from an inner circumferential side thereof towards an outer circumferential side thereof. A vibration damping device equipped with the pneumatic actuator is also disclosed.
    Type: Application
    Filed: June 25, 2008
    Publication date: January 8, 2009
    Applicants: TOKAI RUBBER INDUSTRIES, LTD., HONDA MOTOR CO., LTD.
    Inventors: Eiji Tanaka, Tetsuya Miyahara
  • Publication number: 20090001242
    Abstract: A muffler hanger including: a rubber annular portion; a rubber arm constituting an elastic support portion for the muffler; an upper space and a lower space for permitting deformation of the rubber arm; a first mounting hole disposed in a center of the rubber arm in a vehicle left-right direction to extend in a vehicle front-back direction when installed on the vehicle, and attached in a mated condition to a support pin provided on one of a muffler side and a vehicle body side; and a pair of second mounting holes disposed at locations away to right and left sides from the first mounting hole to extend in the front-back direction, and attached in a mated condition to support pins on the other side. The first and second mounting holes are arranged to form a row in the left-right direction, with positional relationships such that when installed on the vehicle the holes overlaps one another as viewed in the left-right direction.
    Type: Application
    Filed: June 23, 2008
    Publication date: January 1, 2009
    Applicants: TOKAI RUBBER INDUSTRIES, LTD., HONDA MOTOR CO., LTD.
    Inventor: Masami Endo
  • Publication number: 20090001675
    Abstract: A sealing member according to an embodiment of the present invention seals a gap between a first member and a second member which is displaceable from a farthest state to a closest state with respect to the first member. The sealing member includes a first seal formed of porous urethane foam which extends in a direction from the first member to the second member, and a second seal formed of porous urethane foam which extends in a direction from the second member to the first member. Between the first seal and the second seal, an overlapping section in which the first seal and the second seal overlap in a direction intersecting with a stroke direction at least in the farthest state is arranged. The first seal and the second seal are approximately in contact. The first seal and the second seal are arranged such that their protruding ends do not come into pressure contact in the stroke direction with each other in the closest state.
    Type: Application
    Filed: June 18, 2008
    Publication date: January 1, 2009
    Applicant: TOKAI RUBBER INDUSTRIES, LTD
    Inventor: Manabu Higashi
  • Publication number: 20090001639
    Abstract: A fluid filled type vibration damping device having a pressure-receiving chamber and an equilibrium chamber disposed on either side of a partition member. A movable cover member juxtaposed against the partition member from the pressure receiving chamber side to cover a communicating hole of the partition member. An outside peripheral edge of the movable cover member is held in intimate contact against the partition member through urging force of an elastic retainer portion. Pressure of both chambers will acts on both faces of a movable rubber film, thereby constituting a pressure fluctuation absorbing mechanism. The outside peripheral edge of the movable cover member is separated from the partition member in opposition to the urging force by negative pressure in the pressure receiving chamber for providing a shunting mechanism for preventing excessive negative pressure in the pressure receiving chamber.
    Type: Application
    Filed: June 18, 2008
    Publication date: January 1, 2009
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Mutsumi Muraoka, Satoshi Umemura
  • Publication number: 20090005225
    Abstract: A charging roll includes a shaft and an ionically conductive elastic layer formed around the shaft. The ionically conductive elastic layer is formed of a rubber composition free of any electron-conductive agent and containing 0.7 to 1.0 parts by weight of a peroxide cross-linking agent per 100 parts by weight of an ion-conductive rubber. The ion-conductive rubber is formed of at least one of an epichlorohydrin rubber and a nitrile rubber, and a percentage of a rubber component in the ionically conductive elastic layer measured by thermogravimetric analysis is 90% or more by weight.
    Type: Application
    Filed: June 18, 2008
    Publication date: January 1, 2009
    Applicant: Tokai Rubber Industries, Ltd.
    Inventors: Kenichi Tsuchiya, Naoaki Sasakibara, Fumio Misumi, Satoshi Suzuki, Kadai Takeyama
  • Patent number: 7464968
    Abstract: A laminated low-permeability elastic ring (40) comprising an outer layer (40A) of a low permeability material that possesses impermeability to automotive fuel, and an inner core part (40B) of a low temperature-resistant material with excellent low temperature performance in order to maintain high elastic strength at low temperatures for the low permeability material layer.
    Type: Grant
    Filed: February 25, 2005
    Date of Patent: December 16, 2008
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Kazushige Sakazaki, Koji Hioki
  • Publication number: 20080302467
    Abstract: A pressure resistant vibration absorbing hose has a hose body including an inner surface rubber layer, a reinforcing layer and an outer surface rubber layer and a joint fitting including a rigid insert pipe and a socket fitting. The joint fitting is attached to a swaged portion of an axial end portion of the hose body by securely swaging the socket fitting thereto. The inner surface rubber layer is formed by molding such that a swaged portion thereof is larger than a main portion thereof in diameter and a wall thickness of the swaged portion is equal to or larger than a wall thickness of the main portion, and after that, the reinforcing layer and the outer surface rubber layer are laminated to construct the hose body.
    Type: Application
    Filed: July 11, 2008
    Publication date: December 11, 2008
    Applicants: Denso Corporation, Tokai Rubber Industries, Ltd.
    Inventors: Hajime Mukawa, Keiichi Kitamura, Tetsuya Arima, Norihiko Furuta, Ayumu Ikemoto
  • Publication number: 20080296818
    Abstract: A fluid filled type vibration damping device includes a first mounting member, a second mounting member, a main rubber elastic body, a flexible film, a partition member, a valve, a coil, a control-signals-generating circuit and a power amplifier circuit. The valve enables to switch the second orifice passage between an open state and a closed state. The second orifice passage communicates the pressure-receiving chamber and the equilibrium chamber with each other. The switch of the valve is performed by an electromagnetic force occurring by an electrical connection of the coil. Furthermore the control-signals-generating circuit is formed and disposed separately from the coil. The control-signals-generating circuit produces state switching control signals of the valve.
    Type: Application
    Filed: April 16, 2008
    Publication date: December 4, 2008
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Hironori Koyama, Atsushi Muramatsu, Akio Saiki, Takayoshi Yasuda
  • Patent number: 7455299
    Abstract: A sub sealing projection of an elastic sealing member for a fuel tank is entirely angled, and shaped so as to satisfy 20° ? ?1 (angle defined by its upper surface and a cylindrical sealing portion)? 35°, 50° ? ?2(angle defined by its lower surface and the cylindrical sealing portion)? 70°, 0.4? B (radial distance between a portion having a diameter corresponding to an inner peripheral surface of the cylindrical wall portion and a leading end of the sub sealing projection)/A (maximum projecting distance of the sub sealing projection)? 0.55, and a leading end portion of the sub sealing projection is shaped so as to satisfy a condition, 0.1? R (curvature radius of cross-section thereof)/C(length of a base portion of the sub sealing projection)? 0.2.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: November 25, 2008
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hiroyoshi Mori, Yoshiki Kodaka
  • Patent number: 7445201
    Abstract: An engine mount including: an inner fitting having a first flange at a first axial end thereof; a cylindrical outer fitting having at a first axial end a second flange extending outwardly in the axis-perpendicular direction and positioned in opposition to but spaced apart from the first flange portion in an axial direction; a side rubber elastic body elastically connecting the first and second flanges; a main rubber elastic body elastically connecting the inner fitting and the outer fitting in a direction of axial elongation of the side portion rubber elastic body; and a hollow portion extending from a second axial end toward a first axial end of the main rubber elastic body with a distal and thereof reaching an interior of the side rubber elastic body, thereby bifurcating the main rubber elastic body at an inside circumferential face of the outer fitting. The engine mount is positioned with the axial direction facing a left-right direction of the vehicle.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: November 4, 2008
    Assignee: Tokai Rubber Industries, Ltd.
    Inventor: Masami Endo
  • Patent number: 7438328
    Abstract: A quick connector is provided with a connector housing and a wire retainer. The connector housing has a retainer mounting portion which is formed with engagement slits. The wire retainer is mounted on the retainer mounting portion such that engaging arms enter the engagement slits and project in the retainer mounting portion. Each of the engaging slits has a width larger than a diameter of the engaging arm in order to generate a collision noise by collision between the engaging arm and the connector housing or the pipe upon completion of closing motion of the engaging arms.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: October 21, 2008
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hiroyoshi Mori, Motohide Nishimura, Tetsuya Souji
  • Patent number: 7434599
    Abstract: A hose and a method of producing the same. The hose includes a tubular resin inner layer, a metal plating layer formed on an outer peripheral surface of the resin inner layer, and a resin outer layer formed on an outer peripheral surface of the metal plating layer, wherein a chromium oxide film is formed on the outer peripheral surface of the resin inner layer and a metal film is formed on an outer peripheral surface of the chromium oxide film between the resin inner layer and the metal plating layer and the metal plating layer is formed on an outer peripheral surface of the metal film. Further, a chromium oxide film is formed between the metal plating layer and the resin outer layer.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: October 14, 2008
    Assignee: Tokai Rubber Industries, Ltd.
    Inventor: Kensuke Sasai
  • Publication number: 20080248217
    Abstract: In a method for producing a hose with a sealing layer, a hose body having a resin innermost layer is prepared, a rod-like core member is disposed through a center portion of a hollow interior of a connecting portion of the hose body so as to occupy the center portion, and the plasma gas is fed and distributed in an interior of an innermost layer of the connecting portion to modify an inner surface of the innermost layer. Then, the sealing layer is formed on the inner surface by coating an elastic material for the sealing layer on the inner surface of the connecting portion.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 9, 2008
    Applicant: Tokai Rubber Industries, Ltd.
    Inventor: Yorihiro Takimoto
  • Publication number: 20080241449
    Abstract: A hydrin rubber composition free from nickel and excellent in heat aging resistance, ozone resistance, storage stability, and the like is provided which essentially contains the following components: (A) a hydrin rubber containing 10 to 40 mol % of ethylene oxide; (B) an amine-based antioxidant; (C) a phenol-based antioxidant; (D) a metal dithiocarbamate excluding nickel salts; and (E) a hydrotalcite compound. Also provided is a heat-resistant hose having a layered structure including an inner layer and a hydrin-based rubber layer disposed on the outer surface of the inner layer. The hydrin-based rubber layer is composed of a rubber composition containing (F) a 1,8-diazabicyclo[5.4.0]undecene-7 salt, in addition to the foregoing (A) to (E).
    Type: Application
    Filed: March 27, 2008
    Publication date: October 2, 2008
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Hideji Fukaya, Hidehito Ikeda
  • Publication number: 20080237953
    Abstract: A vibration damping mount assembly having a vibration damping mount main body and a tubular bracket. The tubular bracket is made of lightweight material composed of non-ferric metal or synthetic resin, and has an inside peripheral face including an upper tapered face and a lower tapered face that gradually expand in diameter towards openings at either axial end from an axially medial section. A flanged portion of a second mounting member is axially juxtaposed against an open end of the upper tapered face, while the lower tapered face is pressed against a rubber fitting, with the lower tapered face locked in contact against an annular mating face of the rubber fitting thereby providing dislodging of the vibration damping mount main body from the tubular bracket.
    Type: Application
    Filed: March 5, 2008
    Publication date: October 2, 2008
    Applicants: TOKAI RUBBER INDUSTRIES, LTD., HONDA MOTOR CO., LTD.
    Inventors: Eiji Tanaka, Tetsuya Miyahara