Patents Assigned to Fujikura Rubber Ltd.
  • Patent number: 10763559
    Abstract: An object is especially to provide a metal-air battery that ensures a high output and continuance of the output over a long period of time as compared with a conventional one. A metal-air battery in the present invention includes a case, air electrodes disposed on both sides of the case, and a plurality of metal electrodes disposed inwardly separately from the air electrodes. The metal electrodes are opposed to one another via a space (S). The metal-air battery of the present invention can inhibit the reaction product from depositing between the air electrode and the metal electrode. A degree of freedom of a distance between the air electrode and the metal electrode is high. As described above, the high output and the continuance of the output over a long period of time are ensured.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: September 1, 2020
    Assignee: FUJIKURA RUBBER LTD.
    Inventors: Masaki Takahashi, Tsutomu Narita, Yoshiharu Nakajima, Hiroshi Sakama
  • Patent number: 10749230
    Abstract: An object is especially to provide a metal-air battery unit that has a compact configuration including a water supply space and an electrical system space. The metal-air battery unit of the present invention includes a unit main body including a plurality of metal-air battery cells, a water supply space supplying an electrolyte to the metal-air battery cells and an electrical system space coupling to a positive electrode and a negative electrode of the metal-air battery cell to control a battery output, disposed on an outer surface of the unit main body.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: August 18, 2020
    Assignee: FUJIKURA RUBBER LTD.
    Inventors: Masaki Takahashi, Tsutomu Narita, Yoshiharu Nakajima, Hiroshi Sakama
  • Patent number: 10411226
    Abstract: It is an object to provide a metal-air battery capable of, in particular, properly discharging produced gas externally, and performing rapid water supply. A metal-air battery according to the present invention is characterized by including a unit body including a plurality of metal-air battery cells; a water supply space provided on a top surface of the unit body and is common to the metal-air battery cells; and a wiring opening which communicably connects with the water supply space and from which wires connected to electrodes of the metal-air battery cells are drawn out. A tubular portion having the wiring opening projects from the top surface of the unit body.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: September 10, 2019
    Assignee: FUJIKURA RUBBER LTD.
    Inventors: Masaki Takahashi, Tsutomu Narita, Yoshiharu Nakajima, Hiroshi Sakama
  • Patent number: 10406412
    Abstract: A metal foil satisfies following conditional equations (1), (2) and (3) to smoothly increase rigidity in the longitudinal direction of the shaft main body from a distal end side to a base end side while increasing a weight of a wound part of the metal foil 0.50<Lmf/Ls??(1) Lmr/Ls<0.90??(2) 0.03<Wm/Ws<0.09??(3) where Lmf: a length from a distal end position in the longitudinal direction of the shaft main body to a winding start position of the metal foil, Lmr: a length from the distal end position in the longitudinal direction of the shaft main body to a winding end position of the metal foil, Ls: a length of the shaft main body, Wm: a weight of the metal foil, and Ws: a weight of the shaft main body.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: September 10, 2019
    Assignee: FUJIKURA RUBBER LTD.
    Inventors: Masaki Wakabayashi, Yoshihito Kogawa
  • Publication number: 20190203797
    Abstract: A piston rod of a shock absorber includes a pipe material formed of a fiber material and a resin material, and connection members provided to the ends of the pipe material. The pipe material has an inner peripheral surface which has not been subjected to processing for cutting the fiber material, and the connection members have joint parts that are inserted into the inner peripheral surface and are joined to the pipe material with an adhesive.
    Type: Application
    Filed: September 6, 2017
    Publication date: July 4, 2019
    Applicants: KYB Corporation, FUJIKURA RUBBER LTD.
    Inventors: Takao MURATA, Kazunori FUEKI, Takuya TSUKAMOTO
  • Publication number: 20190024810
    Abstract: A check valve structure includes: a valve casing communicating with each of inflow and outflow paths for a fluid; and a valve element which is disposed in the valve casing and configured of an elastic material. The valve element has a thin portion, and a thick portion protruding from the substantial center of one surface of the thin portion. The valve casing has: a valve element support portion including an annular bottom portion capable of supporting an outer edge of a bottom portion of the thick portion, and a peripheral wall portion continuing to an outer peripheral edge of the annular bottom portion; and a valve seat portion including a valve element contact portion which is in contact with a vicinity of an outer peripheral edge portion on the other surface side of the thin portion, and a valve seat surface which can be in contact with the thin portion.
    Type: Application
    Filed: April 6, 2016
    Publication date: January 24, 2019
    Applicant: FUJIKURA RUBBER LTD.
    Inventor: Nobuyasu HARASHIMA
  • Patent number: 10138925
    Abstract: An FRP drive shaft includes an end joint joined to at least one end of an FRP cylinder via an outer collar. The end joint includes a serrated portion on an outer periphery thereof. The outer collar includes a small-diameter collar portion and a large-diameter collar portion. The serrated portion is press-fitted into an inner periphery of the FRP cylinder and fixed to an inner periphery of the small-diameter collar portion. A gap between an inner periphery of the large-diameter collar portion and an outer periphery of the FRP cylinder is filled with an adhesive for fixing the inner periphery of the large-diameter collar portion and the outer periphery of the FRP cylinder to each other. An adhesive-accumulating space which partially increases a filling amount of the adhesive is formed between the inner periphery of the large-diameter collar portion and the outer periphery of the FRP cylinder.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: November 27, 2018
    Assignees: FUJIKURA RUBBER LTD., HONDA MOTOR CO., LTD.
    Inventors: Takato Nakamura, Masako Okochi, Naoki Kimoto, Tsuyoshi Matsuda, Yuji Katayama, Michihiro Komatsu
  • Patent number: 10022603
    Abstract: A golf club shaft and a golf club using such a golf club shaft are achieved, wherein the golf club shaft is capable of suppressing variations of various parameters at impact by reducing the difference in rigidity between the layers of the shaft body. The golf club shaft includes full-length bias prepregs provided only as a plurality of pairs thereof and as full-length layers that extend over an entire length of the shaft body, wherein fiber directions of each pair of the full-length bias prepregs are inclined at an angle within a range of 22 degrees through 28 degrees relative to a longitudinal direction of the shaft body, respectively.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: July 17, 2018
    Assignee: FUJIKURA RUBBER LTD.
    Inventors: Masaki Wakabayashi, Yoshihito Kogawa
  • Patent number: 9995322
    Abstract: A multistage piston actuator exerts a driving pressure against a spring pressure into pressure chambers of piston bodies, fitted into a cylinder body, to operate the push rod. Each piston body is combined with a partition fitted into the cylinder body. Each piston body includes a pressure receiving plate portion, and an axial rod and a slidable cylindrical guide portion extending concentrically in opposite directions, the axial rod having an axial air passage connected to the pressure chambers. Each partition includes a base plate portion having a through-hole which receives the axial rod of an adjacent piston body, a large-diameter outermost cylindrical portion fitted into the cylinder body, and a slidable cylindrical guide portion slidably fit-engaged with the slidable cylindrical guide portion of the piston body. The axial rods of each piston body are brought into contact to operate the push rod.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: June 12, 2018
    Assignees: FUJIKURA RUBBER LTD., Fujikin Incorporated
    Inventors: Takashi Ejiri, Tomohiro Nakata, Tadayuki Yakushijin
  • Patent number: 9982692
    Abstract: An air cylinder apparatus equipped with a fall prevention mechanism, wherein the air cylinder apparatus includes a cylinder body and a piston rod which advances and retreats by supplying and discharging pressurized air to and from the cylinder body, and wherein the fall prevention mechanism includes a fixed member which is immovable with respect to the cylinder body; a plurality of brake members which are supported by the fixed member to be capable of coming into and out of contact with the fixed member; a biasing member which presses the plurality of brake members against the piston rod to lock the piston rod to the fixed member; and a lock-release air mechanism which holds, against a biasing force of the biasing member, the brake members in a non-contact position with the piston rod, the lock-release air mechanism operating by a pressurized air source that is common with that of the air cylinder apparatus.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: May 29, 2018
    Assignee: FUJIKURA RUBBER LTD.
    Inventor: Masaki Takahashi
  • Patent number: 9878225
    Abstract: A golf club shaft formed by winding prepregs, made of reinforced fibers impregnated with a thermosetting resin, into layers and thermally curing the prepregs. The golf club shaft includes a 90-degree prepreg, a fiber direction of which is orthogonal to a longitudinal direction of the golf club shaft and which is provided on each of an inner layer side and an outer layer side, and the golf club shaft satisfies the following condition: 2.0?D2/D1?4.0, wherein D1 designates a thickness of the inner-layer-side 90-degree prepreg, and D2 designates a thickness of the outer-layer-side 90-degree prepreg.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: January 30, 2018
    Assignee: FUJIKURA RUBBER LTD.
    Inventors: Yoshihito Kogawa, Masaki Wakabayashi
  • Patent number: 9371933
    Abstract: A flow regulator which is capable of suppressing hysteresis and includes a housing which includes a fluid inlet port, a fluid outlet port and a valve seat positioned in a communication channel, through which the fluid inlet port and the fluid outlet port are communicatively connected; a plunger guide cylinder coupled to the housing; a plunger provided at an end thereof with a valve body which moves toward and away from the valve seat, the plunger being inserted into the plunger guide cylinder to be freely movable in an axial direction; a spring which biases the plunger in a direction to bring the valve body into contact with the valve seat; and an electromagnetic device which moves the plunger in a valve opening direction against the spring.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: June 21, 2016
    Assignee: FUJIKURA RUBBER LTD.
    Inventor: Toshinori Nitta
  • Patent number: 9150207
    Abstract: The vehicle brake-specific diaphragm of the invention includes a vessel-form member and a flange portion formed at a peripheral edge of an opening in the vessel-form member, wherein the vessel-form member and the flange portion are each formed of a rubber body including silicone rubber and a substrate fabric embedded in the rubber body, the substrate fabric including aramid short fibers or polyester fibers, and having a thickness of 0.25 mm or more. Accordingly, the inventive diaphragm does not only have durability during operation in both the high-temperature and the normal-temperature area but also exerts much better durability during operation in the low-temperature area.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: October 6, 2015
    Assignee: FUJIKURA RUBBER LTD.
    Inventor: Nobuyasu Harashima
  • Patent number: 9108133
    Abstract: An air-permeable water non-permeable device includes a unit including a rubber outer case, a rubber inner case, and an air-permeable water non-permeable sheet sandwiched therebetween; and a housing. The inner case is fitted inside a cylindrical portion of the outer case, the air-permeable water non-permeable sheet being sandwiched between a through-holed base portion of the outer case and a through-holed cylindrical body of the inner case. The through-holed base portion of the outer case faces a mounting through-hole of the housing and the retainer flange portion is externally orientated. The outer case is provided with an insertion guidance small-diameter portion which is not compressed by the retainer inner cylindrical surface and is smaller in diameter than the retainer inner cylindrical surface, and a retainer large-diameter portion which is compressed by the retainer inner cylindrical surface and is larger in diameter than the retainer inner cylindrical surface.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: August 18, 2015
    Assignee: Fujikura Rubber Ltd.
    Inventor: Hitoshi Tsubokawa
  • Patent number: 8883060
    Abstract: A method is provided for producing a weight-reduced FRP cylinder which can attain high strength, and also such an FRP cylinder is provided. This FRP cylinder producing method, in which a plurality of prepregs formed by impregnating reinforced fibers with thermosetting resin sheets are wound into a cylinder and thermally cured to be formed as a plurality of FRP layers, includes a simultaneous multilayer winding process in which a torsional rigidity retaining prepreg and a buckling prevention prepreg are continuously wound a plurality of turns with being layered on each other when the plurality of prepregs are wound into a cylinder, wherein the torsional rigidity retaining prepreg includes a layer of fibers oblique to a cylindrical axis direction of the FRP cylinder, and wherein the buckling prevention prepreg includes a layer of fibers orthogonal to the cylindrical axis direction.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: November 11, 2014
    Assignee: Fujikura Rubber Ltd.
    Inventors: Takato Nakamura, Norio Matsumoto, Naoki Kimoto
  • Patent number: 8882950
    Abstract: A prepreg winding method includes the steps of preparing a plate, a mandrel movable toward and away from the plate, and a press roll movable toward and away from the mandrel and having an axis parallel to the mandrel; mounting a prepreg on the plate, the prepreg being formed by impregnating reinforced fibers with a thermosetting resin sheet; winding a leading end of the prepreg mounted on the plate around the mandrel, and making a pressing force act on the plate and the mandrel therebetween with the prepreg sandwiched between the plate and the mandrel and making a pressing force act on the mandrel and the press roll therebetween with the prepreg sandwiched between the mandrel and the press roll; and winding the prepreg around the mandrel by rotating the mandrel and the press roll.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: November 11, 2014
    Assignee: Fujikura Rubber Ltd.
    Inventors: Takato Nakamura, Norio Matsumoto, Naoki Kimoto
  • Patent number: 8876614
    Abstract: An FRP drive shaft is formed by joining metal end-joints to each end of an FRP cylinder, wherein each of the metal end-joints includes a press-fitting joint having a serrated portion which is press-fitted into the FRP cylinder, and a cylindrical outer collar which is fixed to an outer periphery of the FRP cylinder, and non-circular engaging portions which are engaged with each other to transfer rotation are formed on the press-fitting joint and the cylindrical outer collar, respectively.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: November 4, 2014
    Assignee: Fujikura Rubber Ltd.
    Inventors: Takato Nakamura, Naoki Kimoto
  • Patent number: D820200
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: June 12, 2018
    Assignee: FUJIKURA RUBBER LTD.
    Inventors: Masaki Takahashi, Tsutomu Narita, Yoshiharu Nakajima, Hiroshi Sakama
  • Patent number: D822603
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: July 10, 2018
    Assignee: FUJIKURA RUBBER LTD.
    Inventors: Masaki Takahashi, Tsutomu Narita, Hiroshi Sakama
  • Patent number: D823238
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: July 17, 2018
    Assignee: FUJIKURA RUBBER LTD.
    Inventors: Masaki Takahashi, Tsutomu Narita, Yoshiharu Nakajima, Hiroshi Sakama