Patents by Inventor Kinya Kawakami
Kinya Kawakami has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 5851321Abstract: A pneumatic tire in which the cap tread portion is composed of a rubber composition comprising (i) 100 parts by weight of a diene rubber having a glass transition temperature (Tg) of not more than -45.degree. C. and (ii) not more than 65 parts by weight of carbon black having a nitrogen specific surface area (N.sub.2 SA) of not less than 140 m.sup.2 /g, a DBP oil absorption of not less than 120 ml/100 g, a .DELTA.DBP of not less than 30 ml/100 g, and a half value (.DELTA.Dst) of distribution of aggregates, measured by a centrifugal precipitation method, of not more than 50 m.mu., or a pneumatic tire in which a cap tread portion is composed of a rubber composition comprising (A) 100 parts by weight of a rubber component mainly comprising natural rubber and polybutadiene rubber and having a hardness at 0.degree. C. of not more than 60 and (B) (i) carbon black having a nitrogen specific surface area (N.sub.2 SA) of not less than 120 m.sup.Type: GrantFiled: January 11, 1996Date of Patent: December 22, 1998Assignee: The Yokohama Rubber Co., Ltd.Inventors: Shingo Midorikawa, Kinya Kawakami, Eri Miura
-
Patent number: 5684073Abstract: The cap tread portion composed of a rubber composition having a tan.delta. (0.degree. C.) of at least 0.45 and a tan.delta. (60.degree. C.) of at least 0.25 comprising (i) a p-phenylenediamine type antioxidant, 2,2,4-trimethyl-1,2-dihydroquinoline etc, and carbon black having a nitrogen specific surface area of at least 70 m.sup.2 /g and a 24M4DBP of at least 80 ml/100 g or (ii) a p-phenylenediamine based antioxidant, a 2,2,4-trimethyl-1,2-dihydroquinoline or other polymer mixture of a specific polymer content, and carbon black having a nitrogen specific surface area of at least 70 m.sup.2 /g and a 24M4DBP of at least 80 ml/100 g, blended with a rubber.Type: GrantFiled: May 1, 1995Date of Patent: November 4, 1997Assignee: The Yokohama Rubber Co., Ltd.Inventors: Shingo Midorikawa, Kinya Kawakami, Yasushi Kikuchi, Motoji Fujita
-
Patent number: 5387631Abstract: Rubber compositions for use in pneumatic tire treads. Specified amounts of NR and/or IR and SBR are combined with a selected class of rubber components of the formula ##STR1## SBR contains in its molecular chains one or more atomic groups of the formula ##STR2## Rebound resilience, skid resistance and fuel saving are greatly improved.Type: GrantFiled: May 19, 1993Date of Patent: February 7, 1995Assignee: The Yokohama Rubber Co., Ltd.Inventors: Kinya Kawakami, Atsushi Kanazawa
-
Patent number: 5326810Abstract: Rubber compositions are disclosed for automobile tire treads. One or more SBR rubbers of higher than -40.degree. C. in Tg are combined with carbon black of specified N.sub.2 SA, DBP, .DELTA.DBP and .DELTA.Dst qualities. The resulting composition has enhanced tan .delta. at 0.degree. C. and 60.degree. C., breaking strength, breaking energy and abrasion resistance characteristics.Type: GrantFiled: June 24, 1992Date of Patent: July 5, 1994Assignee: The Yokohama Rubber Co., Ltd.Inventors: Takao Muraki, Kinya Kawakami, Masayoshi Daio
-
Patent number: 5206283Abstract: Rubber compositions for use in tire treads are disclosed. One or more selected styrene-butadiene rubbers of specified glass transition temperatures are blended with a selected type of carbon black of specified physical characteristics. The composition is highly stable in runnability on dry, wet and snowy roads.Type: GrantFiled: October 3, 1991Date of Patent: April 27, 1993Assignee: The Yokohama Rubber Co., Ltd.Inventors: Kinya Kawakami, Takao Muraki, Shigeru Shinoda
-
Patent number: 5179154Abstract: Rubber compositions are disclosed for use in the tread portions of automotive tires. A selected class of starting rubbers are combined with specified amounts of a selected type of carbon black having well balanced N.sub.2 SA, 24M4DBP and .DELTA.Dst properties. The use of this carbon black is conductive to enhanced driving stability and other important physical characteristics of the tire.Type: GrantFiled: January 14, 1991Date of Patent: January 12, 1993Assignee: The Yokohama Rubber Co., Ltd.Inventors: Takao Muraki, Kazuyoshi Kayama, Kinya Kawakami
-
Patent number: 4822844Abstract: Rubber compositions particularly for use in automobile tire treads comprise a selected class of starting rubbers and specified amounts of a selected types of carbon black, this filler having specified values of IA, N.sub.2 SA/IA and .DELTA.D.sub.50 (Dst). The resulting tire excels in abrasion resistance, rebound resilience, antiskidding on wet, snowy and icy roads and fuel economy thus contributing to efficient and safe driving in all seasons.Type: GrantFiled: February 19, 1988Date of Patent: April 18, 1989Assignee: The Yokohama Rubber Co., Ltd.Inventors: Kinya Kawakami, Takao Muraki
-
Patent number: 4800611Abstract: A plate cleaning apparatus comprising a pair of cleaning members disposed above and beneath a passageway of the plate, a first pair of nozzles and a second pair of nozzles for emitting high speed clean air streams, a clean zone for supplying low speed clean air, and feed rollers for advancing the plate. A cleaning roller comprising a plurality of thin discs of nonwoven fabric bonded side by side with adhesive, and a longitudinal shaft extending through central holes in the thin discs is particularly suited for the cleaning members.Type: GrantFiled: April 15, 1987Date of Patent: January 31, 1989Assignees: Hakuto Co., Ltd., Toyo Netsu Kogyo Kaisha, Ltd.Inventors: Masao Toriwaki, Kinya Kawakami, Tomoaki Ishino
-
Patent number: 4799284Abstract: A plate cleaning apparatus comprising a pair of cleaning means disposed above and beneath a passageway of the plate, a first pair of nozzles and a second pair of nozzles for emitting high speed clean air streams, a clean zone for supplying gentle breeze clean air, and feed rollers for advancing the plate. A cleaning roller comprising a plurality of thin discs of nonwoven fabric bonded side by side with adhesive, and a longitudinal shaft extending through central holes in the thin discs.Type: GrantFiled: March 21, 1988Date of Patent: January 24, 1989Assignee: Toyo Netsu Kogyo Kaisha, Ltd.Inventors: Masao Toriwaki, Kinya Kawakami, Tomoaki Ishino
-
Patent number: 4567225Abstract: A rubber composition for tire tread, comprising natural rubber and/or polyisoprene rubber and polybutadiene rubber, which polybutadiene rubber having a 1,2-bond unit content in the range of 40 to 90 mol % and having a specific functional group contained in the molecular chain thereof.Type: GrantFiled: July 5, 1985Date of Patent: January 28, 1986Assignee: The Yokohama Rubber Co., Ltd.Inventors: Makoto Misawa, Tetsuya Mizoguchi, Kinya Kawakami, Asahiro Ahagon
-
Patent number: 4510291Abstract: A rubber composition for tire treads having improved wear resistance and wet grip property without impairing rolling resistance, comprising two different specific styrene-butadiene copolymer rubbers and a specific polybutadiene rubber as the rubber ingredients in specific mixing ratios.Type: GrantFiled: September 7, 1983Date of Patent: April 9, 1985Assignee: The Yokohama Rubber Co., Ltd.Inventor: Kinya Kawakami