Patents Assigned to Tokai Rubber Industries, Ltd.
  • Publication number: 20140248067
    Abstract: A modified polymer body 1 has a polymer body 2 composed of a polymer material containing a carbon-carbon double bond and first binding parts 3 and second binding parts 4 bound to the surface of the polymer body 2. The first binding parts 3 are such that an organic group 6 having a functional group is bound via an isocyanuric acid skeleton 5 to the surface of the polymer body 2. The second binding parts 4 are such that an organic group 7 having a functional group is directly bound to the surface of the polymer body 2 without interposing an isocyanuric acid skeleton 5.
    Type: Application
    Filed: May 15, 2014
    Publication date: September 4, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Yosuke Hayashi, Shuichi Egawa, Yasuyuki Hayasaki
  • Patent number: 8822131
    Abstract: Disclosed is a flexographic printing plate precursor in which formation of cracks and wrinkles in an infrared ablation layer is suppressed and the scratch resistance of the layer is improved. The precursor includes a support, photosensitive resin layer, and an infrared ablation layer that are laminated in the order presented. The binder polymer contained in the infrared ablation layer contains a polymer (A) and an acrylic resin (B). The polymer (A) contains the same structural unit as the structural unit contained in the binder polymer in the photosensitive resin layer. The mass ratio (A/B) of the component (A) with respect to the component (B) is within a range of 1/3 to 3/1. The difference between a plastic hardness (Ha) of the infrared ablation layer and a plastic hardness (Hb) of the photosensitive resin layer is 30 mN/mm2 or smaller.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: September 2, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Daisuke Inoue, Koki Matsuoka, Hideyuki Hashimoto
  • Patent number: 8813924
    Abstract: When manufacturing an upper support which includes a cup piece as an inner piece, an outer piece, and a rubber elastic body integrally vulcanize adhered thereto, the shape of a tubular portion of a cup piece before integral vulcanized adhesion with the rubber elastic body is a shape having a large diameter portion at a top portion continuous with a flanged portion, a small diameter portion at a bottom portion, and a stepped portion therebetween. Following integral vulcanized adhesion with the rubber elastic body, only the small diameter portion is diameter widened by press-fitting a diameter widening jig to impart pre-compression to the rubber elastic body. No roll-back deformation of a flanged portion occurs when integrally vulcanize adhering the cup piece to the rubber elastic body, and also when imparting pre-compression to the rubber elastic body by diameter widening a tubular portion of the cup piece.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: August 26, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventor: Hiroyuki Matsumura
  • Publication number: 20140232049
    Abstract: A fluid-filled vibration damping device including an elastic buffer body supported by a partition member and arranged in a housing space such that at least one of wall inner surfaces of the housing space on sides of a pressure-receiving chamber and an equilibrium chamber is covered by the elastic buffer body. Windows are formed to penetrate the elastic buffer body at portions corresponding to communication holes formed in walls of the housing space so that the communication holes are narrowed by the windows of the elastic buffer body, and a ratio (a/l) of an opening area (a) of the windows to a penetration length (l) thereof is made smaller than a ratio (A/L) of an opening area (A) of the communication holes to a penetration length (L) thereof.
    Type: Application
    Filed: April 23, 2014
    Publication date: August 21, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: Tomohiro KANAYA
  • Publication number: 20140231244
    Abstract: A film member includes a substrate formed of a resin film and an aluminium oxynitride film arranged on either, front or back sides of the substrate, in which the aluminium oxynitride film is composed of 39 at % to 55 at % of Al, 7 at % to 60 at % of O, and 1 at % to 50 at % of N. A method for producing the film member includes a pressure reduction step of arranging a substrate in a chamber of a sputtering deposition system such that the substrate faces a target made of aluminium and a deposition step of introducing a source gas including nitrogen and a carrier gas into the chamber and forming the aluminium oxynitride film on a deposition surface of the substrate in an atmosphere in which a ratio of an oxygen gas pressure to a nitrogen gas pressure in the chamber is not more than 20%.
    Type: Application
    Filed: April 28, 2014
    Publication date: August 21, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: Kensuke Sasai
  • Patent number: 8807546
    Abstract: A fluid filled vibration damping device including: a first mounting member; a second mounting member having a cylindrical portion; and a main rubber elastic body elastically connecting the first and second mounting members. The first mounting member is fixed to one end of the main rubber elastic body, and an insertion metal fitting in a cylindrical shape is fixed onto an outer peripheral face of another end thereof, and the cylindrical portion of the second mounting member is bonded by pressure to the insertion metal fitting with a sealing rubber in between in a fluid-tight manner. The insertion metal fitting is provided with an inward protrusion where part of a wall portion protrudes inward. A sealing rubber storage space is formed between the inward protrusion and the cylindrical portion of the second mounting member.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: August 19, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hironori Daito, Mutsumi Muraoka, Hironori Koyama
  • Publication number: 20140210490
    Abstract: A hybrid sensor includes a proximity sensor section and a load sensor section. The proximity sensor section includes a first base material, a plurality of first front-side electrodes, a plurality of first back-side electrodes, and a protective layer. Each of these members is made of an elastomer. The proximity sensor section detects the approach and coordinates of an object to be detected, based on a change in capacitance between the first front-side electrode and the first back-side electrode which is caused by the approach of the object to be detected. The load sensor section detects pressing and coordinates of the object to be detected, based on a load that is applied from the object to be detected via the proximity sensor section.
    Type: Application
    Filed: March 27, 2014
    Publication date: July 31, 2014
    Applicant: Tokai Rubber Industries, Ltd.
    Inventors: Tomonori HAYAKAWA, Hitoshi UKAI
  • Publication number: 20140210148
    Abstract: A cylindrical vibration-damping device wherein an outer cylindrical member is made in a configuration of two sections divided along an circumference, the outer cylindrical member being externally fitted onto intermediate rings in a non-adhesive manner by means of having the intermediate rings sandwiched by the outer cylindrical member in a radial direction, and a plurality of regulating protrusions protruding inward in the radial direction are formed on the outer cylindrical member at a given distance and arranged on both sides of the intermediate rings in an axial direction so as to provide a positioning member that positions the intermediate rings with respect to the outer cylindrical member in the axial direction by means of abutting the intermediate rings against the regulating protrusions in the axial direction.
    Type: Application
    Filed: March 27, 2014
    Publication date: July 31, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Shimpei EGUCHI, Satoshi UMEMURA, Hiroaki TANAHASHI
  • Patent number: 8791209
    Abstract: A modified natural rubber particle having carbon-carbon double bands assigned to multifunctional vinyl monomers graft-copolymerized onto the surface of the modified natural rubber particle, which is prepared by graft-copolymerization of multifunctional vinyl monomers having two or more carbon-carbon double bonds onto natural rubber particles or deproteinized natural rubber particles. One of the methods for producing a modified natural rubber particle includes the steps of: forming inclusion complex of the multifunctional vinyl monomers having two or more carbon-carbon double bonds with a guest-protecting agent to protect at least one of the double bonds of the multifunctional vinyl monomers; graft-copolymerizing the resulting inclusion complex onto natural rubber particles or deproteinized natural rubber particles; and deprotecting the protected double bonds by removing the guest-protecting agent from the obtained graft-copolymer.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: July 29, 2014
    Assignees: Tokai Rubber Industries, Ltd., National University Corporation Nagaoka University of Technology
    Inventors: Osamu Wakisaka, Akihiro Shibahara, Seiichi Kawahara, Yoshimasa Yamamoto, Nanthaporn Pukkate
  • Patent number: 8789819
    Abstract: A fluid-filled type active vibration damping device including: a first mounting member; a second mounting member; a main rubber elastic body connecting the first and second mounting members; a fluid chamber; an oscillation member that partially defines a wall of the fluid chamber; an actuator having an output shaft, the output shaft being connected to the oscillation member; a connecting member that interconnects the oscillation member and the output shaft at one point with the oscillation member superposed against a projecting distal end of the output shaft; and an abutting portion provided by superposed faces of the oscillation member and the output shaft being positioned in abutment with each other at an outer peripheral side of a connected section where the oscillation member and the output shaft are interconnected by the connecting member.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: July 29, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Mutsumi Muraoka, Satoshi Umemura, Hironori Koyama
  • Publication number: 20140202745
    Abstract: Provided is a conductive composition that has a high conductivity and from which a coating can be formed easily. Also provided is a conductive film that has a high conductivity and in which electric resistance is less likely to increase even during expansion. A conductive composition is prepared by including an elastomer component, a fibrous carbon material having a graphite structure and a fiber diameter of not less than 30 nm, and a conductive carbon black having a structure. A conductive film formed from the conductive composition. The viscosity of the conductive composition formed into a coating with a solid content concentration of not less than 20% by mass, which is measured with a B-type viscometer with an H7 rotor under the conditions of a temperature of 25° C. and a rotation speed of 20 rpm, is not more than 200 Pa·s.
    Type: Application
    Filed: March 26, 2014
    Publication date: July 24, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Jun KOBAYASHI, Hitoshi YOSHIKAWA
  • Publication number: 20140202744
    Abstract: Provided is a conductive film having a high conductivity in which electric resistance is less likely to increase, and a conductive composition for forming the same. The conductive composition includes an elastomer component, a fibrous carbon material having a fiber diameter of less than 30 nm, and a flake-like carbon material having a graphite structure, having an intensity ratio (G/D ratio) of a peak (G band) appearing in the vicinity of 1580 cm?1 to a peak (D band) appearing in the vicinity of 1330 cm?1 of Raman spectrum of not less than 1.8, and having a maximum length of not less than 150 nm and a thickness of not more than 100 nm. The conductive film is formed from the conductive composition.
    Type: Application
    Filed: March 26, 2014
    Publication date: July 24, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Jun KOBAYASHI, Yusuke YAMASHITA, Yutaro TAGUCHI, Hitoshi YOSHIKAWA
  • Patent number: 8783668
    Abstract: A fluid-filled type vibration damping device including an elastic movable member attached to a partition member. The elastic movable member includes a clasped portion clasped by the partition member and a switching portion provided to an outer peripheral side of the clasped portion and positioned within a second orifice passage. An abutting portion is provided to the switching portion and projects to lengthwise opposite sides of the orifice passage. A switching mechanism is constituted for opening the orifice passage through a gap formed between the switching portion and the inside face of the orifice passage while closing the orifice passage by abutment of the abutting portion against the inside face of the orifice passage by means of a tilting motion of the switching portion relative to the clasped portion through elastic deformation of a thin portion provided between the clasped portion and the switching portion.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: July 22, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Ryota Ishikawa, Yuichi Ogawa, Noriaki Yoshii
  • Publication number: 20140191453
    Abstract: A vibration-damping rubber composition is provided, which is used as a material for a rubber member of a liquid-filled vibration-damping rubber device in which a glycol liquid is sealingly contained. The rubber composition comprises: (A) a chloroprene rubber as a major component; and (B) an aromatic hydrocarbon plasticizer. The rubber composition makes it possible to suppress increase in the hardness of the rubber member (chamber wall) after thermal aging and reduction in durability.
    Type: Application
    Filed: March 10, 2014
    Publication date: July 10, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Hiroaki Naiki, Toyohisa Toyama, Norihito Kimura
  • Publication number: 20140193592
    Abstract: A transparent laminated film is provided with which it is possible to inhibit peeling of thin film layers, even with long-term exposure to sunlight during use and exposure to UV rays during quality evaluation. The film has a thin film layer obtained by lamination of multiple thin films on at least one side of a transparent polymer film. This thin film layer has metal oxide thin films formed by a sol-gel process using light energy during sol-gel hardening and post-oxidation thin films formed by post-oxidation of at least one thin film selected from metal thin film, alloy thin film, and partially oxidized metal oxide thin film.
    Type: Application
    Filed: February 18, 2014
    Publication date: July 10, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Tetsuya TAKEUCHI, Tetsuji NARASAKI, Hiroki INAGAKI, Masataka INUZUKA, Yoshihiro TOKUNAGA
  • Publication number: 20140193597
    Abstract: A resin fuel tube is provided, which includes at least one resin layer, wherein the resin layer is made of a resin composition comprising: (A) a polypropylene prepared through polymerization with the use of a metallocene catalyst; and (B) a polypropylene material having a melting point of 137° C. to 160° C., the resin composition having a mixing weight ratio of the components (A) and (B) satisfying (A)/(B)=95/5 to 50/50, wherein the resin layer has a structure such that a soft structural portion (Y) of the component (A) intrudes into a space between crystalline structural portions (X) of the component (B). Therefore, the resin fuel tube is light-weight, excellent in impact resistance and heat resistance, free from fuel leakage, and usable in an atmosphere at 130° C. or higher, for example, in an automotive engine room or the like.
    Type: Application
    Filed: March 10, 2014
    Publication date: July 10, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Takashi Yajima, Koji Mizutani, Kazutaka Katayama
  • Patent number: 8770045
    Abstract: A purpose is to provide a sensor assembly and a sensor module having a flexible sensor element that uses polymer material and having a component such as the sensor element and the like that hardly deteriorates and is superior in durability. A sensor assembly includes a sensor element and an exterior packaging bag enclosing the sensor element. The sensor element includes a sensor thin film made of resin or elastomer, and at least one pair of electrodes connected to the sensor thin film. The exterior packaging bag is made from laminate films having a metal foil and two resin layers arranged sandwiching the metal foil.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: July 8, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Masaru Murayama, Yuuki Saitou, Tomonori Hayakawa, Kazunobu Hashimoto
  • Patent number: 8770560
    Abstract: An electromagnetic actuator wherein an annular supporting member secured to a stator and an oscillator member secured to a movable member are disposed in opposition in an axis-perpendicular direction and are elastically linked by a supporting rubber elastic body disposed therebetween. One axial face of the supporting rubber elastic body is furnished with an inside peripheral recessed portion and an outside peripheral protruding portion while another axial face is furnished with an inside peripheral protruding portion and an outside peripheral recessed portion so as to establish in the supporting rubber elastic body an elastic center axis that curves along a sinuous trajectory of an interconnected peak segment and valley segment situated between opposing faces of the annular supporting member and the oscillator member in the axis-perpendicular direction.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: July 8, 2014
    Assignees: Tokai Rubber Industries, Ltd., Honda Motor Co., Ltd.
    Inventors: Tomohiro Kanaya, Takehiro Okanaka, Koji Imuta
  • Publication number: 20140187713
    Abstract: A highly durable vibration-damping material is provided. The inventive vibration-damping material comprises a thermoplastic polyurethane elastomer as a major component, and carbon black, wherein the carbon black is dispersed essentially only in a soft segment of the thermoplastic polyurethane elastomer.
    Type: Application
    Filed: March 10, 2014
    Publication date: July 3, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Naoki Oyaizu, Kazutaka Katayama
  • Patent number: 8765244
    Abstract: A resin-made fuel inlet pipe having a light weight excellent impact resistance, and causing no fuel leakage, includes: a tubular inner layer; and an outer layer laminated on an outer peripheral surface thereof, in which: the inner layer is formed of a resin having fuel resistance; the outer layer is formed of a resin (A) having a tensile elongation at 8 m/s measured by a high-speed tensile test of 200% or more; and the inner layer and the outer layer are in a substantially non-adherent state.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: July 1, 2014
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Takashi Yajima, Koji Mizutani, Kazutaka Katayama