Patents Assigned to The Yokohama Rubber Co., Ltd.
  • Shoe of crawler belt or chain
    Patent number: 5261733
    Abstract: A crawler shoe used in an endless track vehicle having metal shoes made of iron or the like. The metal shoe has two integral projections projecting toward the ground contact side of the shoe. An elastic shoe made of rubber or the like is integrally molded and fixed to the metal shoe around the projections. The elastic shoe is provided with tapered surfaces, stepped portions, or transverse grooves in areas opposite from the projections to reduce shearing stresses exerted on the end portions of the elastic shoe.
    Type: Grant
    Filed: May 28, 1992
    Date of Patent: November 16, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Yoshiaki Hara
  • Shoe of crawler belt or chain
    Patent number: 5255964
    Abstract: A crawler shoe used in an endless track vehicle having metal shoes made of iron or the like. The metal shoe has two integral projections projecting toward the ground contact side of the shoe. A resilient shoe made of rubber or the like is integrally molded and fixed to the metal shoe around the projections. A reinforced member is embedded in the elastic shoe between two adjacent projections.
    Type: Grant
    Filed: May 28, 1992
    Date of Patent: October 26, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Yoshiaki Hara
  • Rubber composition for coating steel cords and rubber product using the same
    Patent number: 5252405
    Abstract: A rubber composition for coating steel cords, comprising a raw material rubber and, compounded therein, a methylolmelamine derivative and a product of a reaction of a cobalt salt of an organic acid with a metaboric acid ester, and a rubber product reinforced with rubber-coated steel cords comprising steel cords coated with the rubber composition.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: October 12, 1993
    Assignees: The Yokohama Rubber Co., Ltd., Dainippon Ink and Chemicals, Inc.
    Inventors: Hiroyuki Kaido, Kazuyoshi Kayama, Tetsuji Kawazura, Hideyuki Oishi, Yoshihisa Ogihara, Humiaki Yoneyama
  • Honeycomb core
    Patent number: 5250362
    Abstract: A honeycomb core is disclosed which is formed by stretching a block comprising a plurality of layers of steel foil superimposed one upon another and bonded together by an adhesive agent applied in the form of lines spaced in parallel relationship and shifted a half pitch between adjacent steel foil layers.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: October 5, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Takatsugu Hama, Toshifumi Tsuchihashi, Kunio Ohya
  • Pressure endurable hose
    Patent number: 5244016
    Abstract: A hose (1) includes a main pressure cord layer (5) for holding a fluid, and an auxiliary pressure cord layer (7) formed so as to sheathe the main pressure cord layer (5) and to form a buffering space (9) for retaining the fluid leaking through the main pressure cord layer (5) between the main pressure cord layer (5) and the auxiliary pressure cord layer (7). The auxiliary cord layer (7) includes first and second cord plies in an asymmetrical structural relation capable of being twisted by the pressure of the fluid leaking through the main pressure cord layer (5). Thus, even if its main pressure cord layer and its rubber tube are damaged leakage of the fluid can be prevented.
    Type: Grant
    Filed: January 26, 1993
    Date of Patent: September 14, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Masuo Kuroda, Fumihiko Yazaki, Masashi Wakabayashi, Hiroyuki Ohsawa, Naoyuki Ohoka
  • Pneumatic tire with inner liner of ultra high molecular weight polyethylene film and method of making the same
    Patent number: 5236030
    Abstract: A pneumatic tire for automobile having an inner liner of a thin film of ultra high molecular weight polyethylene, which film is laminated directly over an inner wall of green tire and firmly bonded thereto when the tire is vulcanized.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: August 17, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Makoto Misawa, Hiroshi Hirakawa, Masao Inoue
  • Iron golf club head made of fiber-reinforced resin
    Patent number: 5228694
    Abstract: An iron golf club head having a sole and a hosel molded integrally as a frame from a metallic material, a core portion disposed in an upper part above the sole and the outer periphery of the core portion and the outer periphery of the frame except for the sole are covered with a fiber-reinforced resin and a weight having a greater specific gravity than the metallic material of the frame disposed between the sole and the core portion. The weight consists of a mass of 92 to 98 wt. % of powdery tungsten mixed in a polyamide resin.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: July 20, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Takaharu Okumoto, Toshio Ninomiya, Tetsuo Hayashi, Kazuo Kawada
  • Rubber composition for use as a tire tread
    Patent number: 5227424
    Abstract: A rubber composition for tire treads is disclosed which is designed to exhibit high resistance to skidding on wet, icy and snowy roads. A selected rubber blend of styrene-butadiene rubber and natural rubber and/or polyisoprene rubber is combined with a selected carbon black of specified specific surface areas and also with a selected softener of specified viscosity-gravity constants. The styrene-butadiene rubber consists essentially of two styrene-butadiene block copolymers each having varied styrene and vinyl contents and a specified transition temperature width, one block having a higher glass transition temperature than the other.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: July 13, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Akinori Tokieda, Shinji Kawakami, Yasushi Kikuchi, Makoto Misawa, Yoshinori Hunayama
  • Pneumatic radial tire including steel cords of flat oblong cross-sectional configuration
    Patent number: 5223060
    Abstract: A pneumatic radial tire containing a steel cord/rubber composite reinforcement structure wherein the steel cord comprises a plurality of steel filaments embedded in a rubber layer.
    Type: Grant
    Filed: August 13, 1992
    Date of Patent: June 29, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Susumu Imamiya, Yukio Tozawa
  • Pneumatic tire
    Patent number: 5223065
    Abstract: A pneumatic tire having a tread pattern formed on the surface of the tire by using at least two types of main pattern elements having a length in the circumferential direction of the tire equal to at least 1.0% of that of the outer periphery of the tire and a subpattern element having a length in the circumferential direction of the tire of at least 0.5 mm and equal to 0.6% or less of that of the outer periphery of the tire, combining one of the main pattern elements with the subpattern element to prepare a plurality of types of combination pattern elements different from each other in the length of the circumferential direction of the tire and the pattern, and periodically disposing these pattern elements along the circumferential direction of the tire.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: June 29, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Tomohiko Kogure
  • Pneumatic radial tire with noise suppressing rubber sheet in the bead region
    Patent number: 5221385
    Abstract: A pneumatic radial tire having a rubber sheet incorporated in a region lying between a bead core and at least an outer surface portion of the bead portion which is in contact with a rim on which the tire is mounted, to suppress the noise generation. The rubber sheet has a dynamic modulus of elasticity at 20.degree. C., E'(20.degree. C.), of 6.0 MPa to 14.0 MPa and a ration of the dynamic modulus E'(20.degree. C.) to a dynamic modulus of elasticity at 60.degree. C., E'(60.degree. C.), namely E'(20.degree. C.)/E'(60.degree. C.), of at least 1.2 but less than 1.4.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: June 22, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Ryoji Hanada, Makoto Misawa
  • Pneumatic tire having a carcass reinforced with a flat cord made of a plurality of interconnected monofilaments
    Patent number: 5221383
    Abstract: A pneumatic tire for automobiles which has a carcass reinforced with polymeric monofilaments of the same or different diameter which are interconnected by radially inwardly curved peripheral extensions thereof to form a cord having a substantially flat transverse cross-sectional configuration as a whole.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: June 22, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Toru Horikawa, Tomohiko Kogure, Tsuneo Morikawa, Yusaku Miyazaki, Masakazu Okihara
  • Pneumatic radial tire with a belt covering layer reinforced with core-sheath composite fiber cords
    Patent number: 5221384
    Abstract: A pneumatic radial tire including a belt covering reinforcing layer comprising fiber cords each of which comprises a plurality of filaments of a core-sheath composite fiber which comprises a core component of a polyester polymer and a sheath component of a polyamide polymer.
    Type: Grant
    Filed: February 13, 1991
    Date of Patent: June 22, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Shuji Takahashi, Tsuneo Morikawa
  • Rubber compositions
    Patent number: 5219942
    Abstract: A rubber composition comprises as rubber components (A) 30-95 wt. % of an end-modified styrene-butadiene copolymer and (B) 70-5 wt. % of a diene rubber other than the end-modified styrene-butadiene copolymer (A). The end-modified styrene-butadiene copolymer (A) is obtained by reacting at least one compound to active terminals of a starting styrene-butadiene copolymer containing butadiene moieties, the trans-1,4 bond content of which is 70-95 wt. %, and having a styrene content of 5-60 wt. %. The at least one compound is selected from N-substituted aminoketones, N-substituted thioaminoketones, N-substituted aminoaldehydes, N-substituted thioaminoaldehydes and compounds containing in the molecules thereof an atomic group represented by the following formula: ##STR1## in which M stands for an oxygen or sulfur atom. The diene rubber (B) has a glass transition temperature higher than -60.degree. C.
    Type: Grant
    Filed: December 13, 1990
    Date of Patent: June 15, 1993
    Assignees: Nippon Zeon Co., Ltd., The Yokohama Rubber Co., Ltd.
    Inventors: Fumitoshi Suzuki, Yoshihiro Chino, Shuichi Akita
  • Pneumatic radial tire including 1.times.2 steel cords
    Patent number: 5213652
    Abstract: A pneumatic radial tire for automotive vehicles comprising a least one rubber coated steel cord consisting of a pair of intertwisted filaments and having a flatness ratio f in the range of 0.6.ltoreq.f .ltoreq.0.9, where f is defined by 2d/h, where d is a diameter of a filament and h is the maximum diameter of the flattened 1.times.2 cord. This cord is obtained by deforming the cord with a force applied transversely and unidirectionally over its length.
    Type: Grant
    Filed: December 19, 1991
    Date of Patent: May 25, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Hisao Katoh, Susumu Imamiya
  • Pneumatic radial tire including at least two metallic belt cord layers
    Patent number: 5213643
    Abstract: A pneumatic radial tire having a carcass layer of cords disposed substantially at a right angle to the circumferential direction, and four belt layers sandwiched between the carcass layer and a tread. A pair of belt layers composed of a second and a third layer in the direction of from the carcass to the tread of the tire have cord layers crossing one another respectively at an angle of 10.degree. to 30.degree. to the circumferential direction, fatigue resistance of the cords of the second layer being significantly greater than fatigue resistance of the cords of the third layer.
    Type: Grant
    Filed: November 20, 1990
    Date of Patent: May 25, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Yukio Kaga, Tatsuo Suzuki, Makoto Takagi, Fumio Tomisawa
  • Automobile tire
    Patent number: D338178
    Type: Grant
    Filed: August 7, 1991
    Date of Patent: August 10, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Nobuhiro Yamashita
  • Automobile tire
    Patent number: D338435
    Type: Grant
    Filed: August 7, 1991
    Date of Patent: August 17, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Nobuhiro Yamashita
  • Automobile tire
    Patent number: D338858
    Type: Grant
    Filed: August 7, 1991
    Date of Patent: August 31, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Nobuhiro Yamashita
  • Automobile tire
    Patent number: D341361
    Type: Grant
    Filed: June 26, 1991
    Date of Patent: November 16, 1993
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Izumi Kuramochi, Kenichirou Nishida, Kohtaroh Iwabuchi, Susumu Watanabe