Patents Assigned to Mitsuboshi Belting
  • Plied cord, production method therefor, transmission belt, and method for using same
    Patent number: 10941506
    Abstract: A plied cord includes three or four first twist yarns containing para-aramid fibers, wherein: the para-aramid fibers have an average size of 1000-1250 dtex, a tensile elasticity of 55-70 GPa and a tensile strength of 2800-3500 MPa; and for the plied cord, the number of first twists when the number of the first twist yarns is three is 33-40 twists/10 cm and the number of first twists when the number of the first twist yarns is four is 42-52 twists/10 cm, the second twist direction is the opposite direction from the first twist, and the ratio of the second twist coefficient to the first twist coefficient is 0.25-1.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: March 9, 2021
    Assignee: Mitsuboshi Belting Ltd.
    Inventor: Takuya Tomoda
  • Double-Sided Toothed Belt
    Publication number: 20210054904
    Abstract: The present invention relates to a double-sided toothed belt having a plurality of inner teeth arranged on the inner circumferential side of the belt at a prescribed pitch along the lengthwise direction of the belt; and a plurality of outer teeth arranged on the outer circumferential side of the belt at a prescribed pitch along the lengthwise direction of the belt. The double-sided toothed belt is characterized in that: the pitch of the plurality of inner teeth and the pitch of the plurality of outer teeth are equal; the positions of the inner teeth and the outer teeth along the lengthwise direction of the belt match; and the tooth shapes of the inner teeth and the outer teeth are dissimilar.
    Type: Application
    Filed: December 19, 2018
    Publication date: February 25, 2021
    Applicant: Mitsuboshi Belting Ltd.
    Inventor: Eiki Tamura
  • Helical Tooth Belt and Belt Transmission
    Publication number: 20210018063
    Abstract: The present invention relates to a helical toothed belt including: a back portion; a tension member buried in the back portion; and a plurality of tooth portions arranged at a predetermined interval along a belt longitudinal direction on one surface of the back portion, in which the plurality of tooth portions have a tooth pitch of 1.5 mm or more and less than 2.0 mm, the back portion has a thickness of 0.4 mm or more and 1.2 mm or less, the tension member is formed of a twisted cord containing a high-strength glass fiber or a carbon fiber, and the ratio of the total value of an interval between the tension members adjacent to each other to the belt width is 20% or more and 60% or less.
    Type: Application
    Filed: March 27, 2019
    Publication date: January 21, 2021
    Applicant: Mitsuboshi Belting Ltd.
    Inventors: Yoshihito Noborikawa, Masakuni Yoshida
  • Transmission V-Belt
    Publication number: 20210003195
    Abstract: A power transmission V-belt includes a tension member, an adhesion rubber layer in which at least part of the tension member is embedded, and a tension rubber layer and a compression rubber layer stacked via the adhesion rubber layer. A rubber hardness of the tension rubber layer is smaller than a rubber hardness of the compression rubber layer. In the adhesion rubber layer, a rubber hardness on a tension rubber layer side relative to the tension member is smaller than a rubber hardness on a compression rubber layer side.
    Type: Application
    Filed: July 20, 2017
    Publication date: January 7, 2021
    Applicant: Mitsuboshi Belting Ltd.
    Inventors: Kazuhito Yanagihara, Tsuyoshi Nashiro, Susumu Takaba
  • V-Ribbed Belt and Use Thereof
    Publication number: 20210003194
    Abstract: The present invention relates to a V-ribbed belt in which a friction transmission surface of a compression rubber layer is coated with a knit fabric. The compression rubber layer is formed of the cured product of a rubber composition containing an ethylene-?-olefin elastomer and carbon black wherein the carbon black contains a soft carbon having a primary particle diameter of at least 40 nm and a hard carbon having a primary particle diameter of less than 40 nm. The ratio between the number of particles of the soft carbon and hard carbon is former/latter=3/97 to 25/75.
    Type: Application
    Filed: February 14, 2019
    Publication date: January 7, 2021
    Applicant: Mitsuboshi Belting Ltd.
    Inventors: Hiroki Takechi, Hiroki Imai, Manabu Mitsutomi
  • Belt having protrusion formed thereon
    Patent number: 10870539
    Abstract: The present invention relates to a belt with a protrusion, including: a belt main body including tooth portions at a predetermined tooth pitch on an inner surface of the belt in a longitudinal direction, and a cord extending in the longitudinal direction and arranged at a predetermined cord pitch in a width direction; and a protruding portion formed on a back surface of the belt main body by an integral formation, in which: the cord has a fineness of 900 to 1100 deniers, and a ratio of a total of intervals between the adjacent cords to a belt width of 12 to 45%; and the protruding portion is arranged outside the tooth portions, has a hardness of 81 to 91 degrees, and has a base width smaller than the tooth pitch.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: December 22, 2020
    Assignee: Mitsuboshi Belting Ltd.
    Inventors: Kentaro Arimachi, Akira Takenaka, Takahide Okazawa
  • Toothed belt and manufacturing method therefor
    Patent number: 10864691
    Abstract: The present invention relates to a toothed belt (1) containing: a belt main body (2) containing an array of a cord, a tooth portion (2b) formed on the lower side of the array of the cord and arranged at a predetermined interval along a longitudinal direction of the cord, and a back surface portion (2a) formed on the upper side of the array of the cord and having the cord buried therein, which are integrally molded with a first thermoplastic elastomer composition; and a back sheet (3) adhered to the back surface portion side of the belt main body (2) and composed of a second thermoplastic elastomer composition, in which the back sheet (3) has an uneven shape (6) in a surface on the adhesion side.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: December 15, 2020
    Assignee: Mitsuboshi Belting Ltd.
    Inventor: Makoto Ikeda
  • Friction Transmission Belt, Cord for Same, and Manufacturing Method for Same
    Publication number: 20200378469
    Abstract: The present invention pertains to a friction transmission belt that includes a core cable. The core cable includes a cord comprising: a core yarn containing high elastic-modulus fibers; and a plurality of sheath yarns that are disposed around the core yarn and that contain low elastic-modulus fibers. The cord is twisted and the proportion of the average diameter of the sheath yarn to the average diameter of the core yarn is 0.2 to 0.4.
    Type: Application
    Filed: November 12, 2018
    Publication date: December 3, 2020
    Applicant: Mitsuboshi Belting Ltd.
    Inventors: Masashi Tamura, Takeshi Tsuji, Takuya Tomoda
  • Friction Transmission Belt and Manufacturing Method Thereof
    Publication number: 20200362941
    Abstract: A frictional power-transmission belt having a frictional power-transmission surface covered with a composite fiber layer, in which the composite fiber layer includes a fiber member and an isocyanate compound, and the fiber member includes a cellulose-based fiber. In the frictional power-transmission belt, the isocyanate compound may have a proportion of 3 to 20 mass % in the composite fiber layer.
    Type: Application
    Filed: December 27, 2018
    Publication date: November 19, 2020
    Applicant: Mitsuboshi Belting Ltd.
    Inventors: Hiroki Takechi, Kouhei Hamamoto
  • Wrapped V-belt and method for manufacturing wrapped V-belt
    Patent number: 10801580
    Abstract: A wrapped V-belt includes: a belt main body containing a compression layer containing a compression rubber layer and a fabric-laminated body layer a tension rubber layer and a tension member buried between the compression layer and the tension rubber layer; and an outside cloth that covers a periphery of the belt main body, in which the compression layer has a plurality of notch portions not covered with the outside cloth, and the notch portion has a top disposed in the fabric-laminated body layer.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: October 13, 2020
    Assignee: Mitsuboshi Belting Ltd.
    Inventor: Teruyoshi Imaoka
  • V-ribbed belt and method for producing same
    Patent number: 10760646
    Abstract: A V-ribbed belt includes a compression rubber layer containing a vulcanizate of a rubber composition, a tension member, and a tension layer, and has a side part of the compression rubber layer being a ground surface coming into contact with pulleys, and a bottom part of the compression rubber layer being a non-ground surface not coming into contact with pulleys. The V-ribbed belt has, on a surface of the bottom part, a composite layer containing a fiber assembly and a vulcanizate. The fiber assembly contains a heat-resistant fiber which is not melted at a vulcanization temperature of the rubber composition and has a weight per unit area of 25 g/m2 or less. The vulcanizate of the rubber composition impregnated among fibers of the fiber assembly.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: September 1, 2020
    Assignee: Mitsuboshi Belting Ltd.
    Inventors: Masashi Harada, Kohei Sugimura, Shuhei Tanaka
  • Helical Belt and Belt Transmission Gear
    Publication number: 20200232540
    Abstract: The present invention relates to a helical toothed belt including: a back portion in which a tension member is buried; and a plurality of tooth portions, in which: the plurality of tooth portions have a tooth pitch of 2 mm or more and less than 4 mm, in a case where the tooth pitch of the plurality of tooth portions is 2 mm or more and less than 3 mm, the back portion has a thickness of 0.4 mm or more and 1.2 mm or less, in a case where the tooth pitch of the plurality of tooth portions is 3 mm or more and less than 4 mm, the thickness of the back portion is 0.6 mm or more and 1.8 mm or less; and the tension member is a twisted cord including a high-strength glass fiber or a carbon fiber.
    Type: Application
    Filed: July 10, 2018
    Publication date: July 23, 2020
    Applicant: Mitsuboshi Belting Ltd.
    Inventors: Hiroaki Ikegami, Masakuni Yoshida
  • Belt Having Protrusion Formed Thereon
    Publication number: 20200216267
    Abstract: The present invention relates to a belt with a protrusion, including: a belt main body including tooth portions at a predetermined tooth pitch on an inner surface of the belt in a longitudinal direction, and a cord extending in the longitudinal direction and arranged at a predetermined cord pitch in a width direction; and a protruding portion formed on a back surface of the belt main body by an integral formation, in which: the cord has a fineness of 900 to 1100 deniers, and a ratio of a total of intervals between the adjacent cords to a belt width of 12 to 45%; and the protruding portion is arranged outside the tooth portions, has a hardness of 81 to 91 degrees, and has a base width smaller than the tooth pitch.
    Type: Application
    Filed: June 28, 2018
    Publication date: July 9, 2020
    Applicant: Mitsuboshi Belting Ltd.
    Inventors: Kentaro Arimachi, Akira Takenaka, Takahide Okazawa
  • V-Ribbed Belt
    Publication number: 20200217396
    Abstract: The present invention relates to a V-ribbed belt that includes carbon-fiber twisted cords as core wires, the V-ribbed belt having a tensile elasticity of 240-500 N/(mm·%), and the core wire diameter of the core wires being 0.6-1.2 mm. The V-ribbed belt may have a tensile strength of 620 N/mm or more per 1 mm width of the belt.
    Type: Application
    Filed: July 4, 2018
    Publication date: July 9, 2020
    Applicant: Mitsuboshi Belting Ltd.
    Inventors: Masashi Tamura, Takeshi Nishiyama, Manabu Mitsutomi, Hiroshi Matsumura
  • Auto Tensioner Provided in Auxiliary Device Drive Belt System
    Publication number: 20200208717
    Abstract: The present invention pertains to an auto tensioner (1) to be provided in an auxiliary-driving belt system, including a friction member (6) that is sandwiched between an arm (3) and an inner circumferential surface of an outer cylindrical portion (21) of a base (2) in the radial direction of the outer cylindrical portion (21) and that has an arc-shaped surface (60) locked to the arm (2) and slidable with respect to the inner circumferential surface of the outer cylindrical portion (21), equal to or higher than a horizontal plane (HP) passing through a central axis (R) when sliding with respect to the inner circumferential surface of the outer cylindrical portion (21) as the arm (3) oscillates.
    Type: Application
    Filed: June 26, 2017
    Publication date: July 2, 2020
    Applicants: Mitsuboshi Belting Ltd., Mitsuboshi Belting Ltd.
    Inventor: Satoshi Oishi
  • Toothed Belt and Manufacturing Method Therefor
    Publication number: 20200198268
    Abstract: The present invention relates to a toothed belt (1) containing: a belt main body (2) containing an array of a cord, a tooth portion (2b) formed on the lower side of the array of the cord and arranged at a predetermined interval along a longitudinal direction of the cord, and a back surface portion (2a) formed on the upper side of the array of the cord and having the cord buried therein, which are integrally molded with a first thermoplastic elastomer composition; and a back sheet (3) adhered to the back surface portion side of the belt main body (2) and composed of a second thermoplastic elastomer composition, in which the back sheet (3) has an uneven shape (6) in a surface on the adhesion side.
    Type: Application
    Filed: May 24, 2017
    Publication date: June 25, 2020
    Applicant: Mitsuboshi Belting Ltd.
    Inventor: Makoto Ikeda
  • Transmission Belt
    Publication number: 20200200232
    Abstract: The present invention relates to a transmission belt which is provided with: a rubber layer that is formed from a vulcanized product of a rubber composition which contains a rubber component containing an ethylene-?-olefin elastomer, a filler containing silica, a vulcanizing agent containing a sulfur-based vulcanizing agent, and a curable resin containing an amino resin; and a fiber member that is in contact with the rubber layer.
    Type: Application
    Filed: May 23, 2017
    Publication date: June 25, 2020
    Applicants: Mitsuboshi Belting Ltd., Mitsuboshi Belting Ltd.
    Inventors: Toshiki Ozaki, Yorifumi Hineno, Shunsuke Isoe
  • Toothed Belt Transmission Device
    Publication number: 20200182329
    Abstract: This toothed belt transmission device (1) includes a toothed belt (10) in which belt teeth (13) and belt tooth bottom parts (14) are alternately formed, and a toothed pulley (50) in which pulley teeth (53) and pulley tooth bottom parts (54) are alternately formed so as to mesh with the toothed belt (10). The tips of the belt teeth (13) come into contact with the pulley tooth bottom parts (54), but the tips of the pulley teeth (53) do not come into contact with the belt tooth bottom parts (14), and gaps (S) are provided between the tips of the pulley teeth (53) and the belt tooth bottom parts (14).
    Type: Application
    Filed: May 29, 2018
    Publication date: June 11, 2020
    Applicant: Mitsuboshi Belting Ltd.
    Inventor: Makoto Ikeda
  • V-Ribbed Belt and Manufacturing Method for Same
    Publication number: 20200173523
    Abstract: The present invention relates to a V-ribbed belt in which a frictional power-transmission surface is formed from a weft knitted multilayer knitted fabric, characterized in that the weft knitted multilayer knitted fabric contains cellulose based natural spun yarn, polyester based composite yarn, and polyamide based yarn, and in that at least the cellulose based natural spun yarn and the polyamide based yarn are disposed in a layer on the frictional power-transmission surface side.
    Type: Application
    Filed: May 23, 2018
    Publication date: June 4, 2020
    Applicant: Mitsuboshi Belting Ltd.
    Inventors: Kouhei Hamamoto, Takeshi Nishiyama
  • Transmission belt
    Patent number: 10641355
    Abstract: The present invention relates to a transmission belt containing a core wire extending in a lengthwise direction of the belt, an adhesive rubber layer in contact with at least a part of the core wire, a back surface rubber layer formed on one surface of the adhesive rubber layer, and an inner surface rubber layer formed on the other surface of the adhesive rubber layer and engaging or in contact with a pulley, in which the adhesive rubber layer is formed by a vulcanized rubber composition containing a rubber component, a fatty acid amide and a silica.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: May 5, 2020
    Assignee: Mitsuboshi Belting Ltd.
    Inventors: Takeshi Nishiyama, Susumu Takaba, Hisato Ishiguro