Patents Assigned to Tokai Rubber Industries, Ltd.
  • Patent number: 9797354
    Abstract: To provide a fuel line joint capable of improving resistance to an external force in a joint configured to store a liquid fuel. A fuel line joint is equipped with an integrally formed main body portion that has a storage region configured to store a liquid fuel in a lower part thereof and has an opening portion above the storage region of the liquid fuel; a lid that is formed separately from the main body portion, is attached to the main body portion so as to close the opening portion of the main body portion, and is not connected to members other than the main body portion; and a plurality of mounting portions that is formed integrally with the main body portion and mounted to each of a plurality of pipes forming a fuel line.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: October 24, 2017
    Assignee: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: Takahiro Asai
  • Patent number: 9068625
    Abstract: A fluid-filled type vibration damping device having a first and a second fluid chamber respectively filled with non-compressible fluid and which experience relative pressure fluctuations during vibration input, and provided with an orifice passage through which the first fluid chamber and the second fluid chamber communicate with one another, while being capable of exhibiting better dependability and durability in terms of effective vibration damping action of several types of vibration with different frequencies. In the device, tuning frequency of the orifice passage is varied by varying a passage length of the orifice passage 68 through adjustment of an insertion distance of an inside orifice member into an outside orifice member.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: June 30, 2015
    Assignee: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Seiichiro Yamamoto, Koichi Hasegawa, Masaaki Hamada
  • Patent number: 9027912
    Abstract: A vibration damping device including: an inner shaft member; a main rubber elastic body fixed to an outer circumference surface of the inner shaft member; and an outer bracket attached to an outer circumference surface of the main rubber elastic body. At least one locking projection formed to an inner circumference surface on a bracket main unit provided to the outer bracket is inserted and locked in a circumference direction in at least one locking groove formed on the outer circumference surface of the main rubber elastic body. The main rubber elastic body is held between axially opposed surfaces of an abutting protruding part formed on one axial end of the bracket main unit and a retaining protruding part formed on a press fit metal fitting press fit and fixed to another axial end of the bracket main unit.
    Type: Grant
    Filed: April 14, 2014
    Date of Patent: May 12, 2015
    Assignees: Tokai Rubber Industries, Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Satoru Hibi, Akio Saiki, Takayoshi Yasuda, Masahiro Ohnishi, Kentaro Mori, Nobuya Yoshida, Hiroshi Miya
  • Patent number: 8979082
    Abstract: A vibration damping bushing including: an inner axial member; an outer cylindrical member through which the inner axial member is inserted; a main rubber elastic body elastically connecting the two members; and a stopper member that is fitted onto the inner axial member as a component of a first stopper mechanism that limits relative displacement of the inner axial member against the outer cylindrical member to one side in an axial direction. The inner axial member is formed with a latching depression that opens toward an outer periphery thereof, and the stopper member is provided with a latching piece that protrudes outward in the axial direction. The latching piece is engaged with the latching depression so as to provide a slipping out prevention mechanism for preventing the stopper member from slipping out from the inner axial member.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: March 17, 2015
    Assignees: Tokai Rubber Industries, Ltd., Honda Motor Co., Ltd.
    Inventors: Takashi Makino, Chiharu Tanaka, Akira Kobayashi
  • Patent number: 8974982
    Abstract: A fuel cell includes a membrane electrode assembly (MEA) having an electrolyte membrane and a pair of electrodes arranged on both sides of the electrolyte membrane in the thickness direction, a pair of frames having a frame shape and holding an outer periphery portion of the electrolyte membrane, a pair of gas diffusion layers arranged inside the pair of frames and on both sides of the MEA in the thickness direction, and a gasket covering at least a part of the pair of frames. The fuel cell further includes a first cross-linking adhesive member formed of rubber which includes a membrane accommodating portion having an indented shape for accommodating the outer periphery portion of the electrolyte membrane and a first intermediate portion interposed between the pair of frames and which is subjected to cross-linking adhesion with the outer periphery portion of the electrolyte membrane and the pair of frames.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: March 10, 2015
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hideaki Tanahashi, Yutaka Ishioka, Kazutaka Iizuka, Chisato Kato
  • Publication number: 20150061202
    Abstract: A vibration damping device including a first mounting member and a second mounting member elastically connected by a main rubber elastic body, and a separate stopper member positioned in a housing recess that is formed by a cylindrical portion of the second mounting member and that opens in an axial direction. An elastic tapered portion equipped with a contact surface that inclines gradually to an inner circumferential side toward an open side of the housing recess is provided at an inner circumferential surface of the cylindrical portion which constitutes a peripheral wall of the housing recess, and a stopper protrusion projecting outward in an axis-perpendicular direction is provided to the stopper member. The stopper protrusion is positioned further inside the housing recess than the elastic tapered portion and the stopper protrusion overlaps the elastic tapered portion when viewed in axial direction projection.
    Type: Application
    Filed: May 21, 2014
    Publication date: March 5, 2015
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: Toyoshi SETOYAMA
  • Patent number: 8958581
    Abstract: A polymer speaker is configured to include an electrostrictive element having an elastomer or resin dielectric layer and a plurality of electrode layers arranged on the front and back surfaces of the dielectric layer. The electrode layers are formed from a conductive material including a polymer binder and a conductor and having a modulus of elasticity of 100 MPa or less. The spring constant of the electrode layers in the surface direction is smaller than the spring constant of the dielectric layer in the surface direction. The volume resistivity of the electrode layers is 200 ?·cm or less. The polymer speaker provides a practical sound pressure in a wide frequency region from low frequencies to high frequencies.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: February 17, 2015
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Takamasa Ito, Hitoshi Yoshikawa, Mitsuyoshi Kondo, Katsuhiko Nakano
  • Publication number: 20140367546
    Abstract: A vibration damping device including: an inner shaft member; a main rubber elastic body fixed to an outer circumference surface of the inner shaft member; and an outer bracket attached to an outer circumference surface of the main rubber elastic body. At least one locking projection formed to an inner circumference surface on a bracket main unit provided to the outer bracket is inserted and locked in a circumference direction in at least one locking groove formed on the outer circumference surface of the main rubber elastic body. The main rubber elastic body is held between axially opposed surfaces of an abutting protruding part formed on one axial end of the bracket main unit and a retaining protruding part formed on a press fit metal fitting press fit and fixed to another axial end of the bracket main unit.
    Type: Application
    Filed: April 14, 2014
    Publication date: December 18, 2014
    Applicants: TOKAI RUBBER INDUSTRIES, LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoru HIBI, Akio SAIKI, Takayoshi YASUDA, Masahiro OHNISHI, Kentaro MORI, Nobuya YOSHIDA, Hiroshi MIYA
  • Publication number: 20140367547
    Abstract: An engine mount for use in a power unit vibration damping support structure configured to be mounted on a transmission side in a state without a distributed support load of a weight of the power unit being applied, the engine mount including: an inner shaft member; an outer tube member arranged separated to an outer circumference side of the inner shaft member; and a main rubber elastic body fixed to the inner shaft member while being attached to the outer tube member non-adhesively such that the inner shaft member and the outer tube member are elastically connected by the main rubber elastic body, wherein the outer tube member is configured to be attached to the power unit, and the inner shaft member is configured to be attached to a vehicle body.
    Type: Application
    Filed: April 14, 2014
    Publication date: December 18, 2014
    Applicants: TOKAI RUBBER INDUSTRIES, LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masahiro OHNISHI, Akio SAIKI, Takayoshi YASUDA, Hiroyuki ICHIKAWA, Nobuya YOSHIDA, Hiroshi MIYA
  • Patent number: 8913931
    Abstract: Provided is a developing roll for use in an electrophotographic machine capable of preventing an ion conductive agent from blooming and retaining long-term charge decay characteristics. The roll (1) includes a shaft (2), an elastomeric layer (3) and a surface layer (4), wherein the surface layer contains a composition containing an (A) ingredient defining a binder resin having a functional group reactive with an alkoxy silyl group in a (B) ingredient, and the (B) ingredient defining an ion conductive agent containing a cation having a chemical structure represented by R1-N+-R2-Si(OR3)3, where R1: a cyclic organic group or a linear organic group, R2: a group containing at least (CH2)n, n representing an integer number, and R3: an alkyl group, wherein the cation is bound with the (A) ingredient, and wherein the (B) ingredient is 0.10 to 3 parts by mass with respect to 100 parts by mass of the (A) ingredient.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: December 16, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Yosuke Hayashi, Naoki Yamaguchi, Atsushi Ozaki, Kadai Takeyama
  • Patent number: 8894079
    Abstract: An upper support for vehicle suspension including: an inner cylindrical member; an outer cylindrical member spaced apart peripherally outward from the inner cylindrical member; a rubber elastic body interposed between the inner cylindrical member and the outer cylindrical member while elastically connecting the two members; and a flange portion extending radially outward from the outer cylindrical member while being adapted to be overlapped and fixed onto a mounting portion of a vehicle body. A fastening seat portion is provided to the flange portion over a prescribed area and has a contact face adapted to be in contact against the mounting portion of the vehicle body. A concave/convex portion is formed on the contact face of the fastening seat portion over a prescribed area thereof.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: November 25, 2014
    Assignees: Tokai Rubber Industries, Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Matsumura, Yorikazu Nakamura, Satoshi Uchida, Yusuke Washitani
  • Patent number: 8890649
    Abstract: Provided are a bending sensor that is less dependent on an input speed of a strain and in which a response delay is unlikely to occur, and a deformed shape measurement method using the bending sensor. The bending sensor is configured to include a base material; a sensor body arranged on a surface of the base material and containing a matrix resin and conductive filler particles filled in the matrix resin at a filling rate of 30% by volume or more, and in which three-dimensional conductive paths are formed by contact among the conductive filler particles, and electrical resistance increases as an deformation amount increases; an elastically deformable cover film arranged so as to cover the sensor body; and a plurality of electrodes connected to the sensor body and capable of outputting electrical resistances. In the sensor body, cracks are formed in advance in such a direction that the conductive paths are cut off during a bending deformation.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: November 18, 2014
    Assignee: Tokai Rubber Industries, Ltd
    Inventors: Yuuki Saitou, Masaru Murayama, Tomonori Hayakawa, Koichi Hasegawa, Tetsuyoshi Shibata
  • Patent number: 8882090
    Abstract: A fluid-filled type vibration damping device including a partition member having a housing space, and a movable plate housed within the housing space so that displacement thereof is limited by abutment against inside wall faces of the housing space. Abutted sloping faces are defined by outside peripheral portions of the inside wall faces of the housing space situated in opposition in an axial direction while sloping axially outside going towards an inner peripheral side. An outside peripheral abutting portion formed of a rubber elastic body is provided to an outside peripheral portion of the movable plate, and abutting sloping faces are defined by opposite faces of the outside peripheral abutting portion that slope axially outside going towards the inner peripheral side. The abutted sloping faces and the abutting sloping faces have different slope angles so as to slope relative to each other.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: November 11, 2014
    Assignees: Tokai Rubber Industries, Ltd., Honda Motor Co., Ltd.
    Inventors: Naoki Nishi, Mutsuki Nawaji, Masataka Hirano, Daisuke Fukunaga
  • Patent number: 8865280
    Abstract: A fuel hose according to an aspect of the present disclosure includes: a tubular inner rubber layer; a resin layer formed on an outer circumferential surface of the inner rubber layer; and an outer rubber layer formed on an outer circumferential surface of the resin layer, wherein the inner rubber layer includes a rubber material containing the following Components (A), (B) and (C), the outer rubber layer includes a rubber material containing the following Components (A?), (B) and (C?), and the resin layer includes a resin material containing the following Component (X) as a main component: (A) acrylonitrile-butadiene rubber, (A?) blend rubber containing acrylonitrile-butadiene rubber and acrylic rubber, (B) a sulfur vulcanizing agent, (C) an amine catalyst to form bonding points, (C?) an amine catalyst to form bonding points, which contains 1,5-diazabicyclo(4.3.0)non-5-ene salt (DBN salt), and (X) tetrafluoroethylene-perfluoro(alkylvinylether)-chlorotrifluoroethylene copolymer.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: October 21, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Daigo Tamura, Ayumu Ikemoto, Masashi Noda, Yoshiki Kodaka
  • Patent number: 8867972
    Abstract: A development roll for electrophotographic equipment includes a shaft body and a rubber elastic layer disposed on the outer circumference of the shaft body. The rubber elastic layer is composed of a crosslinked body of a composition containing a liquid or millable silicone rubber, a crosslinking agent, an electronically conductive agent, and an ionic liquid. The composition contains the ionic liquid in the amount in the range of 0.1 to 5.1 parts by mass relative to 100 parts by mass of the total amount of the liquid or millable silicone rubber and the crosslinking agent.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: October 21, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Satoshi Suzuki, Yasunori Nimura, Keiichi Inoue, Masanori Satoh
  • Patent number: 8857800
    Abstract: A tank rubber cushion for providing a vibration-damping support of a fuel tank against a vehicle body, including two divided rubber cylinders inserted onto an inner axial member having flanges at both axial ends and to be inserted through a mounting hole formed in a support portion of the fuel tank. Each of the divided rubber cylinders is provided with an axial vibration-damping rubber portion arranged between opposing surfaces of the flange of the inner axial member and the support portion in an axial direction, and a transaxial vibration-damping rubber portion arranged between opposing surfaces of the inner axial member and the support portion in a transaxial direction. The transaxial vibration-damping rubber portion includes a concave/convex portion wherein a diameter varies in a circumferential direction so that an assembly can be made with a gap between the inner axial member and the support portion.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: October 14, 2014
    Assignees: Tokai Rubber Industries, Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Yuya Kawachi, Hideki Maehashi, Takashi Furusawa, Jun Kobayashi
  • Publication number: 20140291905
    Abstract: A fluid-filled vibration damping device including: a primary fluid chamber which gives rise to internal pressure fluctuations based on deformation of a main rubber elastic body at times of vibration input; an auxiliary fluid chamber which gives rise to pressure differentials relative to the primary fluid chamber at times of vibration input; an orifice passage which permits a non-compressible sealed fluid filling the primary fluid chamber and the auxiliary fluid chamber to flow between the two fluid chambers; and an insoluble powder mixed in the sealed fluid filling the primary fluid chamber which provides a bubble nucleus and accelerates dispersed generation of bubbles when pressure within the primary fluid chamber is decreased.
    Type: Application
    Filed: February 19, 2014
    Publication date: October 2, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Tomohiro KANAYA, Eisuke ASANO
  • Publication number: 20140287340
    Abstract: A rubber composition which does not foul molds, requires low production costs and is excellent in mass productivity, and has high adhesion reliability, can be used in an adhesive layer for bonding a constituting member for a fuel cell and a rubber member for sealing and/or two rubber members together, is any one of (?) a liquid rubber composition containing (B) and (C) together with the following (A1), and (?) a solvent-based rubber composition containing a solvent together with the following (A2), (B) and (C). (A1) is a rubber component containing at least liquid rubber. (A2) is at least one selected from the group consisting of EPM, EPDM, NBR and H-NBR. (B) is a crosslinking agent composed of an organic peroxide. (C) is at least one selected from the group consisting of a resorcinol-based compound, a melamine-based compound, an aluminate-based coupling agent and a silane coupling agent.
    Type: Application
    Filed: June 12, 2014
    Publication date: September 25, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Kenji Yamamoto, Hirokazu Hayashi, Shinji Kita
  • Publication number: 20140246821
    Abstract: A post-formation filling type fluid filled vibration damping device wherein a first communication groove, which interconnects a plurality of through holes, is formed in a partition member that separates a pressure receiving chamber and an equilibrium chamber, the groove being formed in a surface of the partition member that opposes a flexible membrane. In addition, a second communication groove, which connects an orifice passage and at least one of the plurality of through holes, is formed in the surface of the partition member that opposes the flexible membrane.
    Type: Application
    Filed: May 9, 2014
    Publication date: September 4, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Satoki KOGA, Chiyaki INOUE, Takehiro OKANAKA
  • Publication number: 20140246558
    Abstract: A vibration damping device including a first mounting member arranged on a lower side of a second mounting member, the first and second mounting members being elastically connected by a main rubber elastic body, and an outer bracket arranged on the lower side of the second mounting member. A coupling part is constituted by engagement between a bottom edge of the second mounting member and a top edge of the outer bracket, and the second mounting member is configured to be attached to a vibration source via the outer bracket. The outer bracket is arranged in opposition to the first mounting member in an axis-perpendicular direction, and an axis-perpendicular stopper member that regulates relative displacement between the first and second mounting members in the axis-perpendicular direction is constituted by contact between the first mounting member and the outer bracket.
    Type: Application
    Filed: May 13, 2014
    Publication date: September 4, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Hiroyuki ICHIKAWA, Takayoshi YASUDA, Akio SAIKI