Patents Assigned to Tokai Rubber Industries, Ltd.
  • Patent number: 8465010
    Abstract: A vibration damping rubber bushing including: an inner cylindrical member; a main rubber elastic body bonded to an outer circumferential face of the inner cylindrical member; a plurality of anti-slip projections provided on at least one of axial end faces of the inner cylindrical member that project axially outward from the axial end face and extend with ribbed shape in a diametrical direction on the axial end face to produce a spokewise pattern overall; and an annular water barrier projection provided on a diametrical medial section of the at least one of the axial end faces of the inner cylindrical member, projecting axially outwardly and extending circumferentially, with the anti-slip projections being disposed to both radially inner side and radially outer side of the annular water barrier projection.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: June 18, 2013
    Assignees: Tokai Rubber Industries, Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Norimasa Kuki, Yoshikane Akiyama, Mitiharu Hikosaka, Kazuhiko Kato, Hitoshi Kawai, Mie Miyauchi
  • Publication number: 20130147187
    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: Application
    Filed: February 5, 2013
    Publication date: June 13, 2013
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: TOKAI RUBBER INDUSTRIES, LTD.
  • Publication number: 20130142548
    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: Application
    Filed: January 30, 2013
    Publication date: June 6, 2013
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: TOKAI RUBBER INDUSTRIES, LTD.
  • Publication number: 20130144012
    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: Application
    Filed: November 26, 2012
    Publication date: June 6, 2013
    Applicants: NATIONAL UNIVERSITY CORPORATION NAGAOKA UNIVERSITY OF TECHNOLOGY, TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: TOKAI RUBBER INDUSTRIES, LTD., National University Corporation Nagaoka University Of Technology
  • Patent number: 8455086
    Abstract: A transparent laminate film which has visible light transmittance, sunlight blocking properties, radio wave transmittance and good appearance is provided. A transparent laminate film includes a laminate structure formed on at least one side of a transparent polymer film, in which a metal oxide layer and a metal layer are laminated, the metal oxide layer containing an organic component, wherein grooves having a width of 30 ?m or less are formed in the laminate structure, and an overall surface resistance is 150 ?/? or more. Preferably, the grooves are numerous cracks, or are formed by laser processing. Further, preferably, the transparent polymer film has an easy adhesion layer formed on at least one side thereof, and the laminate structure is formed on top of the easy adhesion layer. Furthermore, preferably, the metal oxide layer containing the organic component is formed by a sol-gel method using optical energy during sol-gel curing.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: June 4, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Masataka Inuduka, Tetsuya Takeuchi, Hiroki Inagaki, Tetsuji Narasaki, Taiji Nishitani
  • Patent number: 8454002
    Abstract: A fluid filled vibration damping device having an orifice passage formed in a partition member to connect a pressure receiving chamber and an equilibrium chamber, wherein a first end section of the orifice passage extends in along a plane of the partition member, and a communication hole is formed to bend at a right angle from the first end of the orifice passage and open towards the pressure receiving chamber to form a dead water region by orthogonal wall faces of a terminal end face and a bottom face of the orifice passage in a connecting corner section of the orifice passage with the communication hole. A shunt hole of smaller cross-sectional area than the orifice passage and the communication hole is formed in a bottom wall so that the pressure receiving chamber and the equilibrium chamber communicate through the shunt hole in the dead water region.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: June 4, 2013
    Assignees: Tokai Rubber Industries, Ltd., Honda Motor Co., Ltd.
    Inventors: Naoki Nishi, Tetsuya Miyahara
  • Publication number: 20130133435
    Abstract: A bending sensor includes a high resistance layer; a low resistance layer having a crack and a lower electrical resistance than the high resistance layer in a state where the crack is closed; an insulating layer between the high and low resistance layers; and a plurality of electrode portions connecting electrically in parallel the high resistance and low resistance layers. In an OFF state where a bend amount is small, the crack is unlikely to open and a combined resistance of electrical resistances of the high resistance layer and the low resistance layer is output as OFF resistance from the plurality of electrode portions. In an ON state where the bend amount is large, the crack is likely to open and at least the electrical resistance of the high resistance layer is output as ON resistance higher than the OFF resistance from the plurality of electrode portions.
    Type: Application
    Filed: January 29, 2013
    Publication date: May 30, 2013
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: TOKAI RUBBER INDUSTRIES, LTD.
  • Patent number: 8451011
    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: Grant
    Filed: June 3, 2008
    Date of Patent: May 28, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Tomonori Hayakawa, Kazunobu Hashimoto
  • Patent number: 8446075
    Abstract: To provide a conductive film that is flexible, extendable and contractible, and for which the electrical resistance hardly increases even when the conductive film is extended. The conductive film contains an elastomer and metallic filler particles, and satisfies a condition (A) [an average value of reference numbers is 0.8 (1/?m) or more, or the metallic filler particles include flake-like metallic filler particles having a thickness of 1 ?m or less and an aspect ratio of 26 or more and the average value of the reference numbers is 0.4 (1/?m) or more] and a condition (B) [a number of unit areas for which an area percentage of the elastomer is 60% or more is 20 or more], the condition (A) being a conductivity indicator and the condition (B) being a flexibility indicator.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: May 21, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Wataru Takahashi, Hitoshi Yoshikawa, Jun Kobayashi
  • Patent number: 8434587
    Abstract: A purpose is to provide a tubular body soundproof cover and a covered tubular body, for which elastic deformation of the tubular body is unlikely to be inhibited. The tubular body soundproof cover includes a sound absorbing layer arranged on outside in an axially perpendicular direction of a tubular body having tubular body side curved sections; a skin layer arranged on outside in the axially perpendicular direction of the sound absorbing layer; and cover side curved sections arranged on outside in the axially perpendicular direction of the tubular body side curved sections, including at least a portion of the sound absorbing layer and at least a portion of the skin layer. The cover side curved sections have non-adherent sections in which the sound absorbing layer and the skin layer are not bonded over the entire circumferential length.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: May 7, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Kazuki Era, Hiroyuki Ochiai
  • Patent number: 8430373
    Abstract: A fluid-filled type vibration damping device including a resin bracket provided on an outside peripheral face of a second mounting member. The resin bracket includes a mating portion mated within a mating groove of the second mounting member opening in an outside peripheral face of the second mounting member, a mating tubular portion extending on the outside peripheral face of the second mounting member from the mating portion to one axial side, and a mounting portion which is formed at a distal end portion of the mating tubular portion on the one axial side and extends peripherally outward. A weight reducing space opens at a distal end face of the mating tubular portion on the one axial side while extending between an inside peripheral face of the mating tubular portion and the outside peripheral face of the second mounting member in a circumferential direction.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: April 30, 2013
    Assignees: Tokai Rubber Industries, Ltd., Honda Motor Co., Ltd.
    Inventors: Naoki Nishi, Daisuke Fukunaga, Tetsuya Miyahara, Keisuke Kawabe
  • Patent number: 8430382
    Abstract: A second bush of a torque rod is fastened and fixed such that a mating fastening member sandwiches an inner fitting in the axial direction. A rubber stopper on an acceleration side projecting from an outer fitting to the inner fitting is provided such that the rubber thickness increases toward a front end. The inner fitting is provided with a stopper contact forming a recessed space in which the rubber stopper is inserted. After the rubber stopper comes in contact with the stopper contact in a stopper function, the rubber stopper is deformed so as to fill the recessed space, and concurrently bulges in the axial direction to come in contact with the mating fastening member.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: April 30, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hiroyuki Kashihara, Jyoji Tsutsumida, Satoshi Umemura
  • Publication number: 20130098494
    Abstract: A rubber composition for a water hose includes the following components (A) and (B), wherein the component (B) has a melt flow rate (MFR) of 1.0 g/10 min at a temperature of 190° C. and a load of 2.16 kg and the component (B) has a density of 0.870 to 0.908 g/cm3: (A) an ethylene-propylene rubber, and (B) an ethylene-octene resin.
    Type: Application
    Filed: December 14, 2012
    Publication date: April 25, 2013
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: Tokai Rubber Industries, LTD.
  • Patent number: 8424891
    Abstract: Semi-tubular portions of two partition members partitioning a bushing body into an outer rubber portion and an inner rubber portion are asymmetrically arranged with respect to a reference plane containing a central axis of the bushing body and parallel to two attachment surfaces of a bracket. In addition, each of the semi-tubular portions is configured to have a length equal to or larger than a diameter of a stabilizer bar, the length being from one end to the other end in a circumferential direction of the semi-tubular portion in a projection view obtained by projecting the semi-tubular portion to a horizontal surface in a vertical direction.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: April 23, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hiroaki Nagai, Hideo Yanagino, Kouichi Kobayashi, Yuji Homma
  • Patent number: 8424854
    Abstract: A fluid-filled type vibration damping device wherein a low-frequency orifice passage and at least one high-frequency orifice passage are formed in a partition member, which is supported by a second mounting member; a valve body is disposed at least at one opening of the high-frequency orifice passage and is provided with a spring member that in a nonloaded state positions the valve body away from the opening of the high-frequency orifice passage to hold the high-frequency orifice passage in an open state; and, at times of vibration input, the valve body is adapted to block the high-frequency orifice passage in opposition to a holding force of the spring member.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: April 23, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hiroyuki Ichikawa, Yuichi Ogawa, Naoki Furumachi
  • Publication number: 20130089765
    Abstract: An electricity accumulation device includes an electricity accumulation element, an outer jacket material configured to house the electricity accumulation element, and a deformation sensor disposed on an expansive surface of the outer jacket material. The deformation sensor includes a sensor membrane having a base material made of an elastomer or a resin and conductive fillers filling the base material, the sensor membrane being subjected to bending deformation along with expansion of the outer jacket material, and a pair of electrodes connected to the sensor membrane. A three-dimensional conductive path is formed in the sensor membrane through contact between the conductive fillers. An electric resistance is increased along with an increase in amount of deformation of the sensor membrane from a natural state. The electricity accumulation device senses expansion of the outer jacket material on the basis of variations in electric resistance along with bending deformation of the sensor membrane.
    Type: Application
    Filed: November 28, 2012
    Publication date: April 11, 2013
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: TOKAI RUBBER INDUSTRIES, LTD.
  • Publication number: 20130084428
    Abstract: To provide a modified polymer substrate that has both excellent releasability from an accretion adhering to a surface of the substrate and functions for intended use other than releasability, and to provide a method for producing the modified polymer substrate. A modified polymer substrate (1) includes a polymer substrate (2) containing an organic component having unsaturated carbon-to-carbon double bonds, and an organic group having a functional group (R1) arranged to provide functions to a surface of the polymer substrate, wherein the organic group is bonded to the surface of the polymer substrate via an isocyanuraic acid backbone by bringing a treatment solvent (3) that contains (a) a trichloroisocyanuric acid and (b) a compound having an unsaturated carbon-to-carbon double bond and an organic group having a functional group (R1) arranged to provide functions to the surface of the polymer substrate into contact with the surface of the polymer substrate.
    Type: Application
    Filed: November 28, 2012
    Publication date: April 4, 2013
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: TOKAI RUBBER INDUSTRIES, LTD.
  • Publication number: 20130082763
    Abstract: Provided is a capacitive sensor device capable of detecting the position and magnitude of external force with high accuracy. Employed is a capacitive sensor which comprises pairs of electrodes arranged in a matrix, each of the pairs of electrodes being disposed to face each other with a distance therebetween, and an elastically deformable dielectric layer arranged between each of the pairs of electrodes. A capacitance measuring part measures capacitance of respective electrode pair groups in a plurality of combinations each comprising more than one of the pairs of electrodes including a selected one of the pairs of electrodes. An external force calculating part calculates the magnitude of external force applied to the position of the selected pair of electrodes based on a plurality of measured values of the capacitance.
    Type: Application
    Filed: November 27, 2012
    Publication date: April 4, 2013
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: TOKAI RUBBER INDUSTRIES, LTD.
  • Patent number: 8408604
    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: December 30, 2011
    Date of Patent: April 2, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hiroshi Yamada, Kazushige Sakazaki, Takahiro Shibata, Ryo Ikegami, Hisashi Terayama
  • Patent number: 8409682
    Abstract: A heat-resistant air hose for a diesel engine comprising a tubular inner layer and an outer layer formed on an outer peripheral surface of the inner layer, wherein a material for forming the inner layer contains at least one of the following components (A) and (B) and excludes an acid receiver, and a material for forming the outer layer contains a non-peroxide-crosslinkable ethylene acrylic rubber and a non-halogen flame retardant wherein the non-halogen flame retardant is present at not less than 60 and less than 80 parts by weight based on 100 parts by weight of the non-peroxide-crosslinkable ethylene acrylic rubber: (A) an alloy material formed by mixing ethylene acrylic rubber and fluororubber wherein the ethylene acrylic rubber is present at not less than 20% by weight based on the total alloy material; and (B) at least one of acrylic rubber and ethylene acrylic rubber.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: April 2, 2013
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hideji Fukaya, Masashi Noda