Patents by Inventor Kazuo Hirai

Kazuo Hirai 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: 6268416
    Abstract: A colored silicone rubber adhesive film and methods of adhesion by means of the silicone rubber adhesive film are disclosed. The silicone rubber adhesive film comprises (A) an organopolysiloxane; (B) a wet method hydrophobized reinforcing silica; (C) an organohydridopolysiloxane; (D) an azo or anthroquinone pigment, and (E) a curing accelerator. The colored silicone rubber adhesive film is easily handled, possesses excellent workability, and most important, makes it possible to verify the degree and the point of completion of the curing due to the presence of the pigment.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: July 31, 2001
    Assignee: Dow Corning Toray Silicone Company, Ltd.
    Inventor: Kazuo Hirai
  • Patent number: 6057393
    Abstract: Disclosed herein is a sulfide polymer composition for a sliding member, comprising:3-40 wt % of polyethylene tetrafluoride having a three-dimensional network structure forming-ability,5-40 wt % of granulated polyethylene tetrafluoride having a number average molecular weight of from not less than 2,000 to less than 300,000,0.1-15 wt % of a phosphate(s), andthe balance of a sulfide polymer; anda sliding member obtained therefrom.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: May 2, 2000
    Assignee: Oiles Corporation
    Inventor: Kazuo Hirai
  • Patent number: 6033930
    Abstract: In a lead frame carrying method and apparatus, first and second press units are provided on sides of a pair of carrier rails. When carrying a lead frame along the carrier rails, a side edge portion of the lead frame is clamped by being pressed from a surface and a back face of the lead frame almost perpendicularly thereto by the first and second press units. In the lead frame, the clamped side edge portion is floated by a predetermined height above one of the carrier rails during carrying. Accordingly, the lead frame can surely be clamped and carried. In addition, when carrying the lead frame along the carrier rails, the lead frame is damaged with difficulty by the carrier rails.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: March 7, 2000
    Assignee: Matsushita Electronics Corporation
    Inventors: Noboru Okamura, Kaname Nagamine, Katsunori Hirata, Kazuo Hirai, Keisaku Oono, Akira Miyazaki
  • Patent number: 6011105
    Abstract: The flame-retardant silicone rubber composition for coating electrical wire and cable that comprises(A) polyorganosiloxane with the average compositional formula R.sub.a SiO.sub.(4-a)/2 in which R represents substituted and unsubstituted monovalent hydrocarbon groups and a is a number from 1.8 to 2.3;(B) microparticulate silica having a mean primary particle diameter of at least 18 nm and a specific surface area no greater than 95 m.sup.2 /g;(C) platinum or a platinum compound;(D) triazole compound; and(E) methyl-substituted benzoyl peroxide.
    Type: Grant
    Filed: August 24, 1998
    Date of Patent: January 4, 2000
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Kenji Ota, Kazuo Hirai
  • Patent number: 5973058
    Abstract: A silicone rubber composition that does not foam or evolve an unpleasant odor during its cure and that cures into low-surface-tack, non-yellowing silicone rubber moldings comprises:(A) polydiorganosiloxane gum with the average component formula R.sub.a SiO.sub.(4-a)/2 where R represents substituted and unsubstituted monovalent hydrocarbon groups and a is from 1.9 to 2.1,(B) microparticulate silica,(C) bis(ortho-methylbenzoyl)peroxide, and(D) bis(para-methylbenzoyl)peroxide,wherein the component (C) to component (D) weight ratio is from 1:9 to 8:2.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: October 26, 1999
    Assignee: Dow Corning Toray Silicone Co., LTD.
    Inventors: Katsuya Baba, Kazuo Hirai, Takao Matsushita
  • Patent number: 5916940
    Abstract: A silicone rubber electrical wire insulating covering formed by curing a composition comprising (A) 100 parts by weight of a polydiorganosiloxane gum, (B) 10 to 150 parts by weight of finely powdered silica, (C) 0.01 to 20 parts by weight of a zinc compound, and (D) 0.1 to 10 parts by weight of a methyl-group-substituted benzoyl peroxide. When cured the composition has good electrical insulating characteristics and does not adhere to electrical conductors.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: June 29, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Kazuo Hirai, Takao Matsushita
  • Patent number: 5679743
    Abstract: The disclosure describes a polyacetal resin composition comprising 100 parts by weight of a polyacetal resin (A), 0.3 to 10 parts by weight of an olefin copolymer (B) composed of 30 to 70 wt % of ethylene-propylene-diene rubber (B.sub.1), 30 to 70 wt % of an ethylene-vinyl acetate copolymer (B.sub.2) with a vinyl acetate content of 18 to 40 wt % and 1 to 25 wt % of an ethylene-(C.sub.4-6)olefin-1 copolymer (B.sub.3), and 0.1 to 10 parts by weight of a styrene-based thermoplastic elastomer (C) having a functional group.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: October 21, 1997
    Assignee: Oiles Corporation
    Inventors: Kazuo Hirai, Kingo Miyasaka, Masayuki Rokugawa, Katsumi Minou
  • Patent number: 5605955
    Abstract: A silicone rubber composition which has excellent adhesion to various substrate materials with which it is in contact during its curing. The silicone rubber composition comprises an adhesion promoter comprising an addition reaction product or a reaction mixture of (i) a carboxylic acid ester described by general formula ##STR1## where R.sup.2 is an alkenyl group and x is a number of 1 to 6, and (ii) an alkoxysilane expressed by general formula ##STR2## where R.sup.3 is a monovalent hydrocarbon group which does not contain aliphatic unsaturated linkage, R.sup.4 is an alkyl group, and a is a number of 1 to 3.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: February 25, 1997
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventor: Kazuo Hirai
  • Patent number: 5519080
    Abstract: An insulator includes a housing portion. The housing portion is composed a silicone rubber obtained by curing a composition containing diorganopolysiloxane (A) and a fine silicon powder (B) by heating, and a methylalkylpolysiloxane oil (C). The diorganopolysiloxane has at least two silicon atom-bonded alkenyl groups in one molecule. The methylalkyl-polysiloxane oil (C) has each of both terminal ends of each molecular chain blocked with a trialkysiloxy group and possessing a viscosity at 25.degree. C. being 1 to 1,000 centistokes, and is incorporated into the above composition in an amount of 1-100 parts by weight per 100 parts by weight of the component (A).
    Type: Grant
    Filed: August 10, 1994
    Date of Patent: May 21, 1996
    Assignees: Dow Corning Toray Silicone Co., Ltd., NGK Insulators Ltd.
    Inventors: Takao Matsushita, Katsuya Baba, Kazuo Hirai, Isao Nakajima, Takayuki Takeda
  • Patent number: 5369161
    Abstract: A process for insulating high voltage conducting media by insulating such media with a silicone rubber composition capable of being converted to a rubbery elastomer superior in high voltage electrical insulating characteristics is provided. The composition comprises the following components (a) to (e) and not containing a platinum catalayst:(a) 100 parts by weight of an organopolysiloxane gum;(b) 10-100 parts by weight of a finely divided silica filler;(c) 15-300 parts by weight of aluminum hydroxide;(d) 1-20 parts by weight of a OH terminated organosilane or organosiloxane oligomer; and(e) 0.05-6 parts by weight of an organic peroxide.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: November 29, 1994
    Assignees: NGK Insulators, Ltd., Dow Corning Toray Silicone Co., Ltd.
    Inventors: Shigehiko Kunieda, Shigeo Ishino, Takao Nakai, Kazuo Hirai, Takao Matsushita, Kazuhide Takeshita
  • Patent number: 5187665
    Abstract: The vehicle seat and the steering wheel are shifted to the drive position when the door is open and to the getting in/out position when the door is opened, as long as the ignition key is inserted into the key cylinder without shifting the key at the accessory and ignition positions. Further, the seat and wheel are shifted to the drive position when the key is inserted into the key cylinder and to the getting in/out position when the key is removed therefrom, as long as the key is not shifted at the accessory and ignition positions. Further, the seat and wheel are shifted to the drive position when the key is shifted to the ignition position, as long as the key is inserted into the key cylinder and shifted at the accessory position.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: February 16, 1993
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Toru Futami, Kazuo Hirai, Shigeki Tezuka
  • Patent number: 5023288
    Abstract: The silicone rubber adhesive film of the present invention is characterized by simplicity of handling and an excellent workability and useablility, as well as by adhesiveness for various types of substrates and an excellent durability of adhesion. These characteristics are obtained because the silicone rubber adhesive film of the present invention comprises a silicone rubber composition which consists of components (A) through (G), particularly the specific wet-method hydrophobicized reinforcing silica comprising component (C) and the specific compounds of components (D) and (E) or components (D), (E), and (F), and because the tensile strength of said uncured silicone rubber composition falls within the range of 1.5 kg/cm.sup.2 to 5.0 kg/cm.sup.2 at 25 degrees Centigrade (JIS K 6301). Accordingly, when used on flat substrates such as textiles, glass, rubber sheet, etc., it can tightly bond the adhered partners into a single, integral body.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: June 11, 1991
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Kazuo Hirai, Akira Kasuya
  • Patent number: 4948826
    Abstract: The reaction product of a cerium compound with an alkali metal silanolate in combination with a platinum compound and a titanium compound when added to a peroxide-curable silicone rubber composition yields a transparent, heat stable and flame resistant cured silicone rubber.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: August 14, 1990
    Assignee: Toray Silicone Company Limited
    Inventor: Kazuo Hirai
  • Patent number: 4891393
    Abstract: A thermosetting organopolysiloxane composition made from organopolysiloxane gum, reinforcing silica having at least two weight percent methoxy groups, organohydrogenpolysiloxane having at least three silicon-bonded hydrogen atoms per molecule, and a curing catalyst, such as organic peroxide or platinum catalyst, exhibit improved adhesion to a variety of substrates such as glasses, metals, and plastics.
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: January 2, 1990
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Kazuo Hirai, Takao Matsushita
  • Patent number: 4598134
    Abstract: A primer composition for heat curable silicone rubber compositions has been developed which provides adhesion to various synthetic rubbers, plastics, and inorganic materials. The primer composition is composed of three components. Component (I) consists of component (A) or (B). Component (A) consists of an organosilicon compound containing at least one epoxy group-containing monovalent hydrocarbon group, and at least one silicon-bonded lower alkenyl group or silicon-bonded hydrogen atom in each molecule. Component (B) consists of a mixture of (a) an organosilicon compound which possesses silicon-bonded hydroxyl and silicon-bonded lower alkenyl or silicon-bonded hydrogen, and (b) an organotrialkoxysilane containing at least one epoxy group-containing monovalent hydrogen group. Component (II) comprises a trialkoxysilane or its partial hydrolysis product. Component (III) comprises an organotitanate ester.
    Type: Grant
    Filed: April 30, 1985
    Date of Patent: July 1, 1986
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Kazuo Hirai, Takao Matsushita
  • Patent number: 4551393
    Abstract: A heat-resistant shift member is disclosed which comprises a fundamental body having substantially a desired configuration and formed of one or more of compressed heat-resistant materials such as expanded graphite with entangled wires being firmly embedded therein, and a shifting surface layer member integrally covering the shifting surface of the fundamental body which is formed of one or more of compressed other heat-resistant materials, such as asbestos as well as one or more of powdered solid lubricant compounds such as metallic sulphide with entangled other metal wires made of copper alloy being firmly embedded therein, whereby both of the metal wires are also partially entangled with each other. There is also disclosed a method for manufacturing the same.
    Type: Grant
    Filed: August 11, 1983
    Date of Patent: November 5, 1985
    Assignee: Oiles Industry Co., Ltd.
    Inventors: Kikuo Sumiyoshi, Eiji Sato, Kazuo Hirai, Kingo Miyasaka, Masayoshi Izumi
  • Patent number: 4340090
    Abstract: A product obtained by mixing a vinyl-containing poly- diorganosiloxane, an organohydrogenpolysiloxane, a silica filler treated with dimethyldichlorosilane, optionally diphenylsilanediol, and a platinum catalyst is useful for treating glass fiber and is an electrical insulating material. The cured product has excellent electrical characteristics, flame retardancy, mechanical strength, and transparency.
    Type: Grant
    Filed: August 21, 1981
    Date of Patent: July 20, 1982
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Takao Matsushita, Kazuo Hirai
  • Patent number: 4207807
    Abstract: A plastic air cylinder assembled by the specific combination of a plurality of metal tie rods, inside and outside nuts, a resilient and compressible member and supporting plates whereby the plastic cylinder tube is permitted to expand more than the metal tie rods.
    Type: Grant
    Filed: August 31, 1978
    Date of Patent: June 17, 1980
    Assignee: Oiles Industry Co., Ltd.
    Inventors: Yataro Takata, Yukinori Takenoshita, Kiyoshi Sasahara, Akira Shigaki, Kazuo Hirai, Kosei Maeda, Hideo Tadokuro, Hirokazu Maeda
  • Patent number: 4194155
    Abstract: A portion of the instrument panel which is adjacent to the steering wheel is protruded and in which portion a radio receiving device is fitted which includes station-number and frequency indicator means and control means for station selection and frequency adjustment. The indicator means are arranged in the front face of the protruded panel portion so as to enable the driver readily to take the indicator readings without the need of shifting his line of sight to any substantial extent. The control means are arranged in the protruded panel portion sidewise thereof, including, among others, a single control knob arranged in a position to be readily reached by the driver's hand for controlling operation.
    Type: Grant
    Filed: June 14, 1978
    Date of Patent: March 18, 1980
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Kazuo Hirai, Junich Kamata, Sadao Makiguchi, Kazuhiro Iwai