Patents by Inventor Setsuo Akiyama

Setsuo Akiyama 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: 6576680
    Abstract: Reclaimed rubber which is obtained through devulcanization and has excellent physical properties as a vulcanized material, and a process for producing the same are provided. In the reclaimed rubber obtained by devulcanizing vulcanized rubber, the proportion of sol is 80% or higher, and the peak top molecular weight of sol as determined by gel permeation chromatography (GPC) is 100,000 or less.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: June 10, 2003
    Assignee: Bridgestone Corporation
    Inventors: Nobumitsu Ohshima, Jingo Shirasaka, Setsuo Akiyama
  • Publication number: 20010025060
    Abstract: Reclaimed rubber which is obtained through devulcanization and has excellent physical properties as a vulcanized material, and a process for producing the same are provided. In the reclaimed rubber obtained by devulcanizing vulcanized rubber, the proportion of sol is 80% or higher, and the peak top molecular weight of sol as determined by gel permeation chromatography (GPC) is 100,000 or less.
    Type: Application
    Filed: February 27, 2001
    Publication date: September 27, 2001
    Inventors: Nobumitsu Ohshima, Jingo Shirasaka, Setsuo Akiyama
  • Patent number: 5780132
    Abstract: A composite rubber article is obtained by joining a rubber composition based on a brominated p-methylstyrene/isobutylene copolymer to a different material such as a plastic, inorganic and metallic material through a di-, tri- or tetra-alkoxysilane compound. The copolymer is firmly joined to the different material. The invention is applicable to the manufacture of composite rubber articles such as tires, high-pressure hoses, and pneumatic springs.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: July 14, 1998
    Assignee: Bridgestone Corporation
    Inventors: Shinji Saitoh, Masato Yoshikawa, Setsuo Akiyama, Shingo Kato
  • Patent number: 5707701
    Abstract: A rubber composition comprising a rubber component and a di- or trialkoxysilane compound is joined to a surface-modified resin to form a resin/rubber laminate. The laminate typically forms a refrigerant carrying hose wherein the resin defines an inside surface.
    Type: Grant
    Filed: August 23, 1995
    Date of Patent: January 13, 1998
    Assignee: Bridgestone Corporation
    Inventors: Shinji Saitoh, Setsuo Akiyama, Kazuo Naito
  • Patent number: 5686505
    Abstract: Only an outer surface of an unvulcanized rubber sheet is preliminarily crosslinked by irradiating an infrared ray or a far infrared ray to the unvulcanized rubber sheet prior to subsequent final vulcanization, whereby the occurrence of rubber spew and rubber flash is considerably suppressed at the vulcanization step.
    Type: Grant
    Filed: December 7, 1995
    Date of Patent: November 11, 1997
    Assignee: Bridgestone Corporation
    Inventors: Yukihiro Kusano, Mahito Fuji, Masato Yoshikawa, Kazuo Naito, Fumihiro Matsuyama, Yoshio Nohara, Setsuo Akiyama
  • Patent number: 5466424
    Abstract: A surface treating method is described, which method comprising applying, between electrodes, a potential sufficient to cause corona discharge to occur in the presence of a gas which comprises molecules containing at least one atom selected from the group consisting of halogen atom, oxygen atom and nitrogen atom. The resultant corona discharge is applied to an object to be treated for the surface treatment of the object, said object being outside said electrodes. The excellent adhesive surface can be obtained when said object is separated from said electrodes at a distance in the range of 10 mm to 5 m.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: November 14, 1995
    Assignees: Bridgestone Corporation, Bridgestone Sports Co., Ltd.
    Inventors: Yukihiro Kusano, Tomoko Inagaki, Masato Yoshikawa, Setsuo Akiyama, Kazuo Naitoh
  • Patent number: 5403419
    Abstract: A rubbery composite material comprising a substrate and a rubber composition bonded thereto is prepared by metallizing a substrate with a thin film of zinc, copper, cobalt or an alloy thereof by dry plating such as vacuum deposition, ion plating, DC magnetron sputtering, bipolar sputtering, and RF sputtering processes, and pressing a vulcanizable rubber composition to the metallized substrate under heat and pressure to effect vulcanization bonding.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: April 4, 1995
    Assignee: Bridgestone Corporation
    Inventors: Masato Yoshikawa, Yukio Fukuura, Setsuo Akiyama, Makoto Nakamura, Kazuo Naito, Toshio Honda
  • Patent number: 5316739
    Abstract: Disclosed herein is a method for surface treatment which comprises subjecting an object for surface treatment to an atmospheric pressure plasma while rolling or floating said object in an insulating vessel fed with a prescribed gas and provided on the outside thereof or on both the outside and inside thereof with electrodes for voltage application and grounding, said atmospheric pressure plasma occurring upon application of a voltage to said electrodes. This method permits simple, certain, and uniform surface treatment of any objects in the form of lump or sphere. The surface treatment by the atmospheric pressure plasma does not need the apparatus to be evacuated. Therefore, it can be carried out in a simple apparatus without causing the object for surface treatment to release volatile matters.Disclosed also herein is a method for the surface treatment of vulcanized rubber with an atmospheric pressure plasma in the presence of an oxygen-containing gas and halogen containing gases.
    Type: Grant
    Filed: August 19, 1992
    Date of Patent: May 31, 1994
    Assignees: Bridgestone Corporation, Satiko Okazaki, Masuhiro Kogoma
    Inventors: Masato Yoshikawa, Yukihiro Kusano, Setsuo Akiyama, Kazuo Naito, Satiko Okazaki, Masuhiro Kogoma
  • Patent number: 4985510
    Abstract: Crystalline N-methoxymethylated nylon is useful to form a coating on a rubber substrate. It is prepared by adding acid to N-methoxymethylated nylon and heat treating the mixture for crystallization.
    Type: Grant
    Filed: July 29, 1988
    Date of Patent: January 15, 1991
    Assignee: Bridgestone Corporation
    Inventors: Setsuo Akiyama, Hisanobu Monobe, Kazuo Naito, Toshio Honda, Kazuo Tanaka
  • Patent number: 4872932
    Abstract: A rubbery composite material comprising a substrate and a rubber composition bonded thereto is prepared by metallizing a substrate with a thin film of zinc, copper, cobalt or an alloy thereof by dry plating such as vacuum deposition, iron plating, DC magnetron sputtering, bipolar sputtering, and RF sputtering processes, and pressing a vulcanizable rubber composition to the metallized substrate under heat and pressure to effect vulcanization bonding.
    Type: Grant
    Filed: April 15, 1988
    Date of Patent: October 10, 1989
    Assignee: Bridgestone Corporation
    Inventors: Masato Yoshikawa, Yukio Fukuura, Setsuo Akiyama, Makoto Nakamura, Kazuo Naito, Toshio Honda
  • Patent number: 4762589
    Abstract: A process for producing a tubular rubber product such as a rubber hose and a rubber coupling in which a polyamide resin and/or polyester resin layer is formed to the main body of a tubular rubber product. The resin layer is formed either by coating an organic solvent-soluble nylon to the surface of the main body of the tubular rubber product applied with the surface treatment of a halogenoid compound, or by polyamide resin or polyester resin film having a softening point in the vulcanization temperature region and treated with an adhesive mainly comprising a resorcine-formaldehyde resin and a rubber latex or treated with an adhesive rubber mainly comprising a resorcine, a formaldehyde-forming substance and a vinylpyridine-butadiene-styrene copolymer rubber and then bonding under vulcanization onto the main body of the non-vulcanized tubular rubber product.
    Type: Grant
    Filed: October 16, 1986
    Date of Patent: August 9, 1988
    Assignee: Bridgestone Corporation
    Inventors: Setsuo Akiyama, Yukio Fukuura, Masato Yoshikawa, Takeyuki Matsuda, Hisanobu Monobe, Shigeki Ohkubo, Shiro Yoshida
  • Patent number: 4657285
    Abstract: A process for producing a tubular rubber product such as a rubber hose and a rubber coupling in which a polyamide resin and/or polyester resin layer is formed to the main body of a tubular rubber product. The resin layer is formed either by coating an organic solvent-soluble nylon to the surface of the main body of the tubular rubber product applied with the surface treatment of a halogenoid compound, or by polyamide resin or by polyester resin film having a softening point in the vulcanization temperature region and treated with an adhesive mainly comprising a resorcine-formaldehyde resin and a rubber latex or treated with an adhesive rubber mainly comprising a resorcine, a formaldehyde-forming substance and a vinylpyridine-butadiene-styrene copolymer rubber and then bonding under vulcanization onto the main body of the non-vulcanized tubular rubber product.
    Type: Grant
    Filed: November 9, 1984
    Date of Patent: April 14, 1987
    Assignee: Bridgestone Corporation
    Inventors: Setsuo Akiyama, Yukio Fukuura, Masato Yoshikawa, Takeyuki Matsuda, Hisanobu Monobe, Shigeki Ohkubo, Shiro Yoshida
  • Patent number: 4613403
    Abstract: Method for treating golf ball surface which is made of balta resin, thermoplastic elastomer, ionomer resin or the like to unpolymerizable gas plasma and then applying usual coating in an apparatus adapted to expose the all over surface of the ball to said plasma. Owing to this treatment, exfoliation of the ball coating can unexpectedly sufficiently be prevented.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: September 23, 1986
    Assignee: Bridgestone Corp.
    Inventors: Tomio Oyachi, Minoru Takahashi, Koichi Izuhara, Setsuo Akiyama, Masato Yoshikawa
  • Patent number: 4317862
    Abstract: A sandwich glass having an intermediate layer formed of a photosensitive resin consisting mainly of an acryloyloxy group- or methacryloyloxy group-containing high polymer and at least one of acrylic acid, methacrylic acid and acryloyloxy group- or methacryloyloxy group-containing compound is excellent in the adhesion between the intermediate layer and the glass plates and has high impact absorbing ability, light resistance and heat resistance.
    Type: Grant
    Filed: December 28, 1979
    Date of Patent: March 2, 1982
    Assignee: Bridgestone Tire Company Limited
    Inventors: Toshio Honda, Itsuo Tanuma, Masao Ogawa, Hikaru Ishikawa, Yukio Fukuura, Setsuo Akiyama, Shozo Ojima, Kazuo Naito
  • Patent number: 4300970
    Abstract: A composite composed of vulcanized rubber and thermoplastic resin which adheres tightly to the rubber can be obtained by treating the surface of the vulcanized rubber with at least one of halogen, halogen generating compound and halogenoid, and bonding melted polyamide resin, polyester resin, styrene series resin or acrylic resin to the above treated rubber surface region by the injection or extrusion molding.
    Type: Grant
    Filed: May 13, 1980
    Date of Patent: November 17, 1981
    Assignee: Bridgestone Tire Company Limited
    Inventors: Toshio Honda, Masao Ogawa, Yukio Fukuura, Hikaru Ishikawa, Kazuo Naito, Setsuo Akiyama, Itsuo Tanuma