Patents Assigned to Tokai Rubber Industries, Ltd.
  • Patent number: 8663805
    Abstract: A heat-resistant hose for a vehicle available at a low cost and excellent in interlayer adhesiveness includes: an inner layer; and an outer layer directly formed on an outer peripheral surface of the inner layer, in which the inner layer comprises a fluorine-based rubber composition containing the following components (a) to (e): (a) a fluorine-based rubber; (b) a polyol-based vulcanizing agent; (c) an organic onium compound; (d) magnesium oxide; and (e) calcium hydroxide, and the outer layer comprises an acrylic rubber composition containing the following components (A) to (C): (A) an acrylic rubber; (B) a benzenediol; and (C) at least one of an imidazole compound and a diamine-based vulcanizing agent.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: March 4, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Shinobu Kanbe, Yasushi Iwata
  • Patent number: 8657269
    Abstract: A vibration damping device including a main rubber elastic body elastically connecting a second mounting member and a first mounting member being arranged on axially one side of the second mounting member and a cylindrical outer bracket fit onto the second mounting member. A stopper portion integrally formed with the outer bracket extends radially inwardly to provide a first pressure receiving portion. A bound stopper member that restricts mutually approaching displacement of the two mounting members in the axial direction is constituted by including the first pressure receiving portion. A cylindrical second pressure receiving portion in a dual structure is formed by having the first pressure receiving portion extend axially inwardly and then folded axially outwardly. An axis perpendicular stopper member that restricts relative displacement of the two mounting members in the axis perpendicular direction is constituted by including the second pressure receiving portion.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: February 25, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Naoki Nishi, Yasunori Isogai
  • Publication number: 20140051788
    Abstract: An insulating silicone rubber composition superior in reliability is provided that has excellent antistatic property while being free from bleeding, blooming, and discoloration. The insulating silicone rubber contains silicone rubber, ionic liquid having an alkoxysilyl group, and preferably a crosslinking agent. The content of the ionic liquid is preferably within a range from 0.001 to 5 parts by mass with respect to 100 parts by mass of the total amount of the silicone rubber and the crosslinking agent.
    Type: Application
    Filed: October 24, 2013
    Publication date: February 20, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: Satoshi Suzuki
  • Patent number: 8651467
    Abstract: A fluid-filled type vibration damping device including a partition member having a moveable film and a short passage interconnecting a pressure receiving chamber and an equilibrium chamber. A valve member that switches between a communicating state and a shut off state of the short passage projects from the moveable film. The valve member has a thick walled part and a thin walled part, the thin walled part being pressed on an inner wall surface of the short passage. A pressure of the pressure receiving chamber is applied through the short passage to a pressure receiving chamber side surface of the thick walled part, while an equilibrium chamber side surface thereof is supported by the partition member. The pressure of the pressure receiving chamber is applied to one side of the thin walled part and a pressure of the equilibrium chamber is applied to another side thereof through the short passage.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: February 18, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Ryota Ishikawa, Yuichi Ogawa, Yorishige Shimizu
  • Patent number: 8651465
    Abstract: A method of manufacturing a bushing assembly that includes a vibration damping rubber bushing having a round cylindrical resin outer cylinder, which is assembled by press fitting an outside peripheral face of the outer cylinder in an axial direction into a cylindrical metal mated component having a circular inside peripheral face. The vibration damping rubber bushing is press fit into the mated component with a rigid powder composed of material harder than the outer cylinder deposited in a section of the resin outer cylinder that is situated on the outside peripheral face and that mates with the inside peripheral face of the mated component, and the outer cylinder and the mated component are assembled in a mated condition such that the rigid powder intervenes between the outside peripheral face of the outer cylinder and the inside peripheral face of the mated component.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: February 18, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Tatsuya Ito, Noboru Arakawa
  • Patent number: 8651469
    Abstract: A vibration damping device includes a vulcanized rubber molding and a resin molding integrally formed with the vulcanized rubber molding. The resin molding includes a sandwiched molding having a core layer and skin layers. The skin layers sandwich the core layer. The skin layer includes a resin composition (A) containing a first thermoplastic resin and an inorganic filler. The core layer includes a resin composition (B) containing a second thermoplastic resin and an inorganic filler. A volume ratio of the skin layers is 40 to 70% of the entire molding, and a bending modulus (E1) and a maximum bending strain (?1) of the skin layers, and a bending modulus (E2) and a maximum bending strain (?2) of the core layer satisfy the following expressions (1) and (2): 1<(E1/?1)<(E2/?2)<10??(1) ?1/?2>1??(2).
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: February 18, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventor: Junichiro Suzuki
  • Publication number: 20140035232
    Abstract: A protective cover including a bellows portion wherein a plurality of valleys and peaks are arranged alternately. The valleys include a plurality of large valleys and a plurality of intermediate valleys whose inside and outside diameter dimensions at bottoms are greater than those of the large valleys, and the large valleys and the intermediate valleys are arranged alternately. Small valleys whose inside and outside diameter dimensions at bottoms are greater than those of the intermediate valleys are respectively arranged between the large valleys and the intermediate valleys. The peaks are respectively arranged between the large valleys and the small valleys as well as between the intermediate valleys and the small valleys, and apexes of the peaks have a same outside diameter dimension as one another. The apexes of the peaks are made thinner than the bottoms of the large valleys.
    Type: Application
    Filed: October 4, 2013
    Publication date: February 6, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Hiroyuki MATSUMURA, Yorikazu NAKAMURA
  • Publication number: 20140039076
    Abstract: To provide a urethane foam molded product having high thermal conductivity and electric insulation and a method for producing the same. A urethane foam molded product includes a base material made of a polyurethane foam and composite particles that are blended in the base material and oriented in a mutually connected state, in which each of the composite particles includes a thermally conductive particle made of a non-magnetic body, and a magnetic particle and an insulating inorganic particle that are adhered to the surface of the thermally conductive particle through a binder. A powder of the composite particles can be produced by stirring a powder raw material containing a powder of the thermally conductive particle, a powder of the magnetic particle, a powder of the insulating inorganic particle, and the binder using a stirring granulator.
    Type: Application
    Filed: October 2, 2013
    Publication date: February 6, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Naoki Katayama, Koji Tomiyama, Yasuo Suzuki
  • Publication number: 20140013514
    Abstract: A mattress including a plurality of cells aligned and disposed on a body pressure working surface of a substrate that supports a human body; and a pressure control member that changes a height of each cell by adjusting a pressure in a fluid chamber formed within the cell. The cells are configured such that as the each cell is inflated by fluid supplied to the fluid chamber within the cell, the height of the each cell increases and a width dimension of the each cell in a direction of alignment decreases, and that peripheral portions of adjacent cells in the direction of alignment are overlapped with each other prior to cell inflation.
    Type: Application
    Filed: September 18, 2013
    Publication date: January 16, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: Akitsugu MISAKI
  • Publication number: 20140011390
    Abstract: A wiring body connection structure includes: a first wiring body having a flexible substrate made of an elastomer, and a flexible wire containing an elastomer and a conductive material; and a second wiring body connected to the first wiring body. The first wiring body has a first connection portion on which the second wiring body is stacked in a front-back direction so as to be connected to the first connection portion, and a first body portion connecting to the first connection portion, and the width of the flexible substrate in the first connection portion is larger than that of the flexible substrate in the first body portion. The second wiring body has a second connection portion that is stacked on the first connection portion, and the second connection portion is formed by a wiring portion where a wire connected to the flexible wire of the first connection portion is disposed.
    Type: Application
    Filed: September 6, 2013
    Publication date: January 9, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Koichi HASEGAWA, Tomonori HAYAKAWA, Hitoshi UKAI
  • Publication number: 20140003634
    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: Application
    Filed: September 3, 2013
    Publication date: January 2, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Takamasa ITO, Hitoshi YOSHIKAWA, Mitsuyoshi KONDO, Katsuhiko NAKANO
  • Publication number: 20140004364
    Abstract: A dielectric film of the present invention includes an elastomer and barium titanate particles with a crystallinity of 80% or more. The elastomer and each of the barium titanate particles each have a functional group, the functional groups can react with each other, and through the reaction of the functional groups, a cross-linked structure with the elastomer and the barium titanate particles is formed. With this structure, the dielectric constant and volume resistivity of the dielectric film of the present invention are high. A transducer of the present invention includes the dielectric film and a plurality of electrodes with the dielectric film interposed therebetween. The transducer of the present invention is excellent in resistance to dielectric breakdown and can output a large force.
    Type: Application
    Filed: September 3, 2013
    Publication date: January 2, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Wataru TAKAHASHI, Hitoshi YOSHIKAWA, Shigeaki TAKAMATSU, Shinji KUMAGAI
  • Patent number: 8609200
    Abstract: In a hose having a resin layer as an inner layer, a plasma treatment is performed on the inner surface of the inner layer and a connecting portion of an end part of the hose to thereby perform surface modification. Then, a sealing layer made of an elastic material is coated on and bonded to the inner surface of the connecting portion.
    Type: Grant
    Filed: April 6, 2009
    Date of Patent: December 17, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Tomoki Inoue, Kazutaka Katayama
  • Patent number: 8596690
    Abstract: A quick connector capable of surely confirming that a pipe body is engaged by a retainer when an elastically-deformable claw of the retainer and an elastically-deformable claw of a checker are adjacently arranged in an axial direction. Checker-axis direction elastically-deformable claws have distal-end sides formed flexibly deformable in the axial direction, maintain a state of being engaged by a second engagement portion of a retainer body by having deflective deformation regulated by a retainer diameter-expanding elastically-deformable claw in a state in which the retainer diameter-expanding elastically-deformable claw is expanded diametrically, and regulate sliding from a first position with respect to the retainer body toward a set radial direction by being engaged by the second engagement portion of the retainer body.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: December 3, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hiroshi Yamada, Kazushige Sakazaki, Takahiro Shibata, Ryo Ikegami, Hisashi Terayama
  • Publication number: 20130311040
    Abstract: Provided is an active noise cancellation apparatus capable of reliably reducing road noise by a technique other than mounting a vibration generator on a floor panel itself or another plate-like interior part itself, while reducing costs and size of the apparatus. A reference signal detector is mounted on a knuckle and the vibration generator is mounted on a wheel housing or a suspension member. An error signal detector detects vibration of the wheel housing or vibration of the suspension member as an error signal, or detects sound in a vehicle interior as an error signal. A controller controls the vibration generator based on the reference signal and the error signal so as to reduce the error signal.
    Type: Application
    Filed: July 26, 2013
    Publication date: November 21, 2013
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Koichi HASEGAWA, Akira KATAGIRI, Hideki OSHIMA
  • Publication number: 20130307568
    Abstract: An external operation detection structure body including: a sensor casing having an aperture window; an external operation detection sensor arranged at a formation zone of the aperture window; a sheet-like interface member that covers a front face of the detection sensor and closes the aperture window; an outer peripheral wall protruding out from a rear face of an outer periphery of the interface member and penetrating into the aperture window so as to be arranged between the detection sensor and the sensor casing; and front and rear face seal protrusions extending respectively from front and rear edges of the outer peripheral wall toward an outer peripheral side so as to be superposed respectively with front and rear faces of a peripheral edge of the aperture window of the sensor casing.
    Type: Application
    Filed: July 29, 2013
    Publication date: November 21, 2013
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Koichi HASEGAWA, Tomonori HAYAKAWA, Atsushi MURAMATSU
  • Patent number: 8573570
    Abstract: A fluid-filled vibration damping device including: a pressure-receiving chamber and an equilibrium chamber disposed on either side of a partition plate, while being connected through a first orifice passage; a moveable film arranged to either a pressure-receiving chamber side or an equilibrium chamber side of the partition plate while being spaced away therefrom to define therebetween an intermediate chamber; a second orifice passage connecting the intermediate chamber and one of the pressure-receiving and the equilibrium chambers while being tuned to higher frequency than the first orifice passage; and a flow straightening plate arranged in opposition to the moveable film at least at one of the intermediate chamber side and an opposite side thereof, the flow straightening plate having a plurality of flow straightening apertures opening towards the moveable film and furnished with a flow limiting member.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: November 5, 2013
    Assignees: Tokai Rubber Industries, Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Ichikawa, Yuichi Ogawa, Naoki Furumachi, Katsuhiro Sakurai, Nobuya Yoshida
  • Patent number: 8573569
    Abstract: An active vibration damper including: an inner shaft member provided to a movable member; an outer tube member provided to a stator; a pair of leaf springs elastically connecting axially both sides of the inner shaft member and the outer tube member so as to make a linear actuator operatable by itself; an elastic connecting rubber connecting the inner shaft member and the outer tube member; a mass body holding portion provided to the inner shaft member for holding an additional mass body that is disposed further outwardly than the elastic connecting rubber; and a housing having a structure dividable in an axial direction in which respective openings are secured to each other with an annular seal being interposed therebetween at an outer peripheral side of the elastic connecting rubber.
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: November 5, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Koichi Hasegawa, Atsushi Muramatsu, Tetsuyoshi Shibata, Hironori Koyama
  • Patent number: 8556239
    Abstract: A fluid filled type vibration damping device including: an obstructing rubber elastic plate disposed so as to obstruct a communication aperture that connects a pressure receiving chamber and an equilibrium chamber; contact retaining portions arranged on an outer peripheral edge of the rubber plate and held in contact against a partition member; an elastic deformation zone arranged circumferentially between the contact retaining portions of the rubber plate so as to undergo elastic deformation on a basis of pressure differential between the pressure receiving chamber and the equilibrium chamber to be spaced away from the partition member to cause the aperture to open up; and a non-linearizing member provided such that the elastic characteristics of the elastic deformation zone become more rigid in a non-linear manner in association with increase in an amount of its deformation.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: October 15, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Kei Okumura, Yasuhiro Komiya
  • Patent number: 8556240
    Abstract: A fluid-filled vibration damping device wherein a partition member is formed by fitting an inner orifice member inside an outer orifice member with the members relatively displaceable. An orifice-defining window is provided on either one of an inside peripheral face of the outer orifice member and an outside peripheral face of the inner orifice member. An orifice passage is defined utilizing a zone being produced through partial covering of the orifice-defining window by the other of the outer orifice member and the inner orifice member. The covered zone of the orifice-defining window changes through relative displacement of the inner orifice member and the outer orifice member, so that a passage length along the orifice passage changes in association with change of the covered zone of the orifice-defining window.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: October 15, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Koichi Hasegawa, Seiichiro Yamamoto