Patents Assigned to Toyo Tire & Rubber Company, Limited
  • Patent number: 5492161
    Abstract: A pneumatic tire for preventing stones from being retained in the tread grooves whereby steps are provided on the lower half portion of the sidewalks of the grooves so as to extend from a side of the tread groove toward the center part thereof reducing the width of the groove in the lower part, and a plurality of narrow sipes are formed on end of the steps in a direction interesecting the tread groove.
    Type: Grant
    Filed: February 9, 1995
    Date of Patent: February 20, 1996
    Assignee: Toyo Tire & Rubber Company, Limited
    Inventors: Yusho Fuchikami, Takeyoshi Koyama, Katsuharu Mitsutake
  • Patent number: 5302636
    Abstract: The present invention provides a rubber composition containing a leather powder or gelatin powder, and a tire having a tread prepared from the rubber composition.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: April 12, 1994
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Hiroshi Takino, Makoto Komai, Riichiro Ohara, Satoshi Iwama, Yuji Yamaguchi, Rinichi Nakayama, Koji Hiramatsu, Kenji Komamizu
  • Patent number: 5226987
    Abstract: A radial tire for heavy load vehicles having a steel cord-reinforced belt interposed between the carcass of radial structure and the tread, which comprises a rubber reinforcing layer extending from the center toward the edges along the inside of the tread and having at least one quarter the tread width, said rubber reinforcing layer being made of a rubber composition containing resorcin or a resorcin derivative as a reinforcing agent in addition to carbon black and silica and also containing hexamethylenetetramine or a melamine derivative as a methylene donor, said rubber reinforcing layer having a reinforcing factor of 2.2 to 5.7 which is defined by .sqroot.E'.multidot.d [where E' denotes the dynamic modulus (MPa) of the rubber reinforcing layer and d denotes the thickness (mm) of the rubber reinforcing layer].
    Type: Grant
    Filed: June 12, 1991
    Date of Patent: July 13, 1993
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Yo Matsumoto, Tetsuto Ueno, Ryo Muramatsu
  • Patent number: 5225011
    Abstract: A tire having superior cut resistance and less belt separation comprising a tread with steel cord belts in which a center rubber for middle part of the tread and a side rubber for both sides thereof are respectively formed of different rubber compositions, and in which at least an inner portion of the center rubber is composed of a rubber composition of superior cut resistance wherein either a natural rubber of a SBR blended natural rubber is compounded with carbon black of large iodine absorption number, silica and silane coupling agent expressed by a formula of (OR).sub.3 SiCnH.sub.2 nSmCnH.sub.2 nSi(OR).sub.3 or (OR).sub.3 SiCnH.sub.2 nX, while the side rubber is composed of a rubber composition having small heat build up.
    Type: Grant
    Filed: January 23, 1992
    Date of Patent: July 6, 1993
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Hiroshi Takino, Yusho Fuchikami, Katsuji Kishida, Keijiro Oda
  • Patent number: 5195357
    Abstract: Method for measuring resistance to slippage comprising the steps of mounting a sample of rubber at the bottom of a pendulum freely swinging on a shaft, sliding the sample of rubber along a road surface sample which is either dry or wet during swinging of the pendulum, measuring kinetic energy loss of the pendulum due to sliding of the sample thus obtaining resistance to slippage, in combination with the step of either heating or cooling the sample of rubber to a predetermined temperature for performing the method.
    Type: Grant
    Filed: August 18, 1992
    Date of Patent: March 23, 1993
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Hiroshi Takino, Makoto Komai, Noriyuki Isobe
  • Patent number: 5126188
    Abstract: The present invention provides a film-coated shaped material for use in sealing an electronic part having high shape retentivity and prepared by blanking a film-coated epoxy resin sheet in a shape in conformity with the configuration of the electronic part, the epoxy resin sheet comprising a plastics film having a thickness of 10 to 1000.mu. and a layer of a curable epoxy resin composition in a substantially uncured state and formed on one surface of the film, the epoxy resin composition comprising per 100 parts by weight of an epoxy resin, 5 to 50 parts by weight of a thermoplastic resin having a number average molecular weight of at least 5000, 5 to 300 parts by weight of an inorganic filler and a curing agent, and a chip sealing material flow preventing frame comprising the above film-coated epoxy resin.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: June 30, 1992
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Toshiki Shimizu, Seiichi Fukunaga, Minoru Matsumura
  • Patent number: 5066702
    Abstract: A tire tread rubber composition including a diene rubber and at least one of silica and carbon black, the composition being characterized in that the amount of extract (E) defined below satisfies the equation (1) and that a hard filler 0.01 to 5 mm in mean particle size and at least 100kg/mm.sup.2 in Knoop hardness is used in an amount of 3 to 80 parts by weight per 100 parts by weight of the component rubber of the composition subjected to extraction with acetone/chloroform after the vulcanization of the composition, wherein said equation isE<0.4 (A-38)(1)wherein E and A are as defined in the specification.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: November 19, 1991
    Assignee: Toyo Tire & Rubber Company, Limited
    Inventors: Hirofumi Hayashi, Yo Matsumoto
  • Patent number: 4946887
    Abstract: A tire tread rubber composition having a two-peak tan.delta. characterized in that the temperature distribution curve for loss tangent (tan.delta.) has two peaks in the range from -120.degree. C. to +100.degree. C. is useful as a tire tread rubber composition.
    Type: Grant
    Filed: October 20, 1988
    Date of Patent: August 7, 1990
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Hiroshi Takino, Satoshi Iwama, Riichiro Ohara, Noriyuki Isobe, Hiroyuki Tobori, Makoto Komai
  • Patent number: 4939551
    Abstract: In a cleaning device for an electrophotographic copying machine having a cleaning member unified in structure by bonding a blade member and a holding member together by an adhesive, the improvement characterized in that a heat-sensitive adhesive having a contact angle with water at 23.degree. C. of 90.degree. to 100.degree. is used as the adhesive.
    Type: Grant
    Filed: December 28, 1988
    Date of Patent: July 3, 1990
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Mitsuaki Hashiyama, Atsushi Inoue, Yoshio Yamada
  • Patent number: 4908401
    Abstract: A rubber composition comprising 40 to 100 parts by weight of carbon black per 100 parts by weight of a rubber component,(a) the rubber composition being characterized in that the rubber component contains, in 100 parts by weight thereof, at least 20 parts by weight of a block copolymer prepared by solution polymerization and comprising one unit of butadiene rubber portion and one unit of random-copolymerized styrene-butadiene rubber portion, the butadiene rubber portion having a vinyl content of 15 to 50%, the styrene-butadiene rubber portion having a vinyl content of 20 to 70% and a styrene content of 30 to 60%, the block copolymer having in its entirety a vinyl content of 15 to 60% and a styrene content of 5 to 30% at least 40% of the copolymer being coupled with a tin compound so that the coupled copolymer has a butadiene rubber terminal, the coupled copolymer having only a single Tg at a temperature of up to -60.degree. C.
    Type: Grant
    Filed: December 21, 1988
    Date of Patent: March 13, 1990
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Riichiro Ohara, Satoshi Iwama, Eiji Ida, Noriyuki Isobe
  • Patent number: 4858666
    Abstract: A radial tire improved in steering stability, durability and appearance comprising a nylon cord of high modulus and excellent dimensional stability obtained by impregnating a nylon cord substantially composed of polytetramethyleneadipamide with an adhesive and heat setting the nylon cord under a stretch state.
    Type: Grant
    Filed: April 30, 1986
    Date of Patent: August 22, 1989
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Yukio Komai, Keijiro Oda
  • Patent number: 4798756
    Abstract: The present invention provides laminate structures of interior finishing material having suitable air permeability and sound absorbing properties.
    Type: Grant
    Filed: January 4, 1988
    Date of Patent: January 17, 1989
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Shigeyoshi Fukushima, Hidehiro Uno, Shigetoshi Mimura
  • Patent number: 4791019
    Abstract: The present invention provides a polyurethane foam interior finishing material having a facing, characterized in that the material comprises a laminate of a thermoplastic synthetic resin facing material and an expanded pad layer, the expanded pad layer comprising a semi-rigid polyurethane foam reinforced with long glass fibers, the long glass fibers being present in the pad layer primarily in the vicinity of the rear side thereof, the finishing material having no core. The invention also provides a process for preparing the material.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: December 13, 1988
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Takamichi Ohta, Takashi Izumi, Takeshi Yamazi, Shigeyoshi Fukushima
  • Patent number: 4745150
    Abstract: A tire tread rubber composition exhibiting outstanding dynamic behavior and characterized in that the composition comprises as a rubber component at least 30 wt. % of an elastic styrene-butadiene copolymer prepared by solution polymerization with use of a lithium-base catalyst, the copolymer being higher than -60.degree. C. in glass transition temperature (T g) and at least 40.degree. C. in the peak mesial width of tan .delta. determined from the temperature range between the two points of intersection of the curve of tan .delta. with the line of tan .delta.=1/2a wherein a is the peak value of tan .delta. determined from a temperature-tan .delta. dispersion curve.
    Type: Grant
    Filed: December 15, 1986
    Date of Patent: May 17, 1988
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Eiji Ida, Riichiro Ohara
  • Patent number: 4732927
    Abstract: A rubber composition for treads characterized in that the composition comprises 100 parts by weight of a rubber component and 50 to 100 parts by weight of carbon black admixed therewith, the rubber component comprising 10 to 50 parts by weight of a solution-polymerized star styrene-butadiene rubber (I) having specific styrene content, vinyl content of the butadiene portion and at least 40% in the efficiency of coupling with a tin halide, 20 to 70 parts by weight of a solution-polymerized straight-chain styrene-butadiene rubber (II) having specific styrene content and vinyl content of the butadiene portion and 10 to 50 parts by weight of natural rubber or isoprene rubber (III), the carbon black being in the range of 75 to 105 in nitrogen adsorption specific surface area (N.sub.2 SA), at least 15 in the difference between N.sub.2 SA and the iodine adsorption number (IA) thereof and 0 to 5 in the difference between N.sub.
    Type: Grant
    Filed: December 15, 1986
    Date of Patent: March 22, 1988
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Eiji Ida, Keijiro Oda
  • Patent number: 4732959
    Abstract: A polymer comprising a poly(urethane)ureamide is prepared by a reaction of a polyisocyanate and a polyesterpolyol derivative of the formula [I] ##STR1## wherein A is an n-valaent radical obtained by removal of terminal hydrogen atoms from an n-valaent polyester-polyol having a molecular weight of 400 to 10,000 and containing ##STR2## group in the main chain, n is an integer of 2.ltoreq.n.ltoreq.4,x is an average value and a number of 0.ltoreq.x.ltoreq.(n-1),--NH-- group of ##STR3## in the main chain forms an amido group connected with a carbonyl group of an aminobenzoic acid and/or a carbonyl group of a polybasic acid component of the polyesterpolyol and,--CO-- group of ##STR4## in the main chain forms an ester group or amido group. The polymer has higher heat resistance and greater mechanical strength as compared to corresponding polyester-urethanes.
    Type: Grant
    Filed: November 13, 1985
    Date of Patent: March 22, 1988
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Kozo Otani, Yoshio Yamada
  • Patent number: 4697627
    Abstract: A pneumatic tire for motor vehicles having a plurality of zigzag grooves formed in its tread circumferentially thereof, the tire being characterized in that the bottom of each of the grooves is stepped to provide a deep groove bottom along one of the walls defining the groove and a shallow flat groove bottom along the other wall.
    Type: Grant
    Filed: January 23, 1986
    Date of Patent: October 6, 1987
    Assignee: Toyo Tire & Rubber Company Limited
    Inventor: Katsuharu Mitsutake
  • Patent number: 4580609
    Abstract: A tire having a tread, wherein a polymer component in the rubber composition constituting the tread comprises at least 30% by weight of a specific styrene-butadiene rubber produced by solution polymerization (S-SBR), and wherein the pattern of the tread has a specific contact area ratio, lateral groove density and lateral siping density is suitable for an all-season tire having high-wet grip properties, low rolling resistance, excellent low-temperature characteristics, and excellent on-ice and on-snow performance at a highly balanced level and with no sacrifice whatsoever of abrasion resisting characteristics.
    Type: Grant
    Filed: August 14, 1984
    Date of Patent: April 8, 1986
    Assignee: Toyo Tire and Rubber Company Limited
    Inventors: Takayoshi Nagata, Mitsuaki Hashiyama
  • Patent number: 4576726
    Abstract: A magnetic coating composition comprising a modified polyurethane resin containing hydroxyl groups at a high concentration, a magnetic powder and, when required, a polyfunctional isocyanate compound.
    Type: Grant
    Filed: January 19, 1984
    Date of Patent: March 18, 1986
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Masato Watanabe, Yuzo Ozaki
  • Patent number: 4537945
    Abstract: A poly(urethane)ureamide which comprises a polymer obtained by a reaction of (a) a polyether derivative of the general formula [I] and (b) a polyisocyanate exhibits an excellent wear resistance and heat resistance due to the presence of the aromatic amido groups ##STR1## wherein A is an n-valent radical obtained by removal of hydroxyl groups from an n-valent polyoxyalkylenepolyol having a molecular weight of 400 to 10,000,n is an integer of 2 to 8,x is an average value and a number of 0.ltoreq.x<(n-1) andy is an average value and a number of 0.05.ltoreq.y<1.
    Type: Grant
    Filed: September 17, 1984
    Date of Patent: August 27, 1985
    Assignee: Toyo Tire & Rubber Company Limited
    Inventors: Kozo Otani, Yoshio Yamada