Patents by Inventor Yoshiharu Kikuchi
Yoshiharu Kikuchi 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).
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Patent number: 7448304Abstract: A main spindle and a back spindle grip works W, respectively. Or, the main spindle grips one end of a work W and the back spindle grips the other end of the work W. A tool is attached to a tool spindle. By adjusting the positions of the spindles and the position of the tool spindle, the work W gripped by the main spindle and the back spindle is machined by the tool. Since tool spindle can change the direction of the tool, the work W, including both ends thereof, can be entirely machined into a complex shape. A guide bush supports the work W to prevent the work W from being bent when a lengthy work W is machined. Therefore, this lathe can entirely machine a long or short work into a complex shape.Type: GrantFiled: September 30, 2004Date of Patent: November 11, 2008Assignee: Tsugami CorporationInventors: Yoshiharu Kikuchi, Shinsuke Kumakura, Hidenori Sato
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Patent number: 7208548Abstract: The crosslinkable rubber composition of the invention is crosslinkable by hot air, and a hot-air crosslinked rubber sheet thereof has no scratch on the surface in a hardness test using a pencil of HB and has a compression set of not more than 70% after a heat treatment at 150° C. for 22 hours. The rubber composition comprises an ethylene/?-olefin/non-conjugated polyene random copolymer rubber comprising a specific vinyl end group-containing norbornene compound, a SiH group-containing compound having at least two SiH groups in one molecule, and if necessary, an addition reaction catalyst comprising a platinum group element and a reaction inhibitor.Type: GrantFiled: December 3, 2004Date of Patent: April 24, 2007Assignee: Mitsui Chemicals, Inc.Inventors: Takashi Hakuta, Masaaki Kawasaki, Yoshiharu Kikuchi, Tsutomu Nakamura, Satao Hirabayashi, Takeo Yoshida
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Patent number: 7176269Abstract: The curable composition of the present invention contains (A1) a silyl-containing ethylene/?-olefin/non-conjugated polyene random copolymer rubber which has a structural unit derived from a norbornene compound as the non-conjugated polyene with at least one specific vinyl group at the terminal and contains a specific hydrolyzable silyl group, and (B) a compound, other than the rubber (A1), having a hydroxyl group and/or a hydrolyzable group, e.g., (B1) a compound having a silanol group and/or a compound which can react with moisture to form a compound having a silanol group in the molecule. This compound improves elongation of the cured product and residual surface tackiness, and, at the same time, is high in curing speed and capable of giving the cured product of high resistance to weather. It is suitable for, e.g., adhesives, tackifiers, paints, sealants, waterproof materials, spray materials, shaping materials and casting rubber materials.Type: GrantFiled: July 24, 2001Date of Patent: February 13, 2007Assignee: Mitsui Chemicals, Inc.Inventors: Takashi Hakuta, Masaaki Kawasaki, Yoshiharu Kikuchi, Mitsunao Arino, Mitsuko Nagai, Hiroaki Sakaguchi, Masaki Sugawara, Masao Kishi, Kaoru Ueno, Takashi Abe, Michio Sekine
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Publication number: 20070015893Abstract: The curable composition of the present invention contains (A1) a silyl-containing ethylene/?-olefin/non-conjugated polyene random copolymer rubber which has a structural unit derived from a norbornene compound as the non-conjugated polyene with at least one specific vinyl group at the terminal and contains a specific hydrolyzable silyl group, and (B) a compound, other than the rubber (A1), having a hydroxyl group and/or a hydrolyzable group, e.g., (B1) a compound having a silanol group and/or a compound which can react with moisture to form a compound having a silanol group in the molecule. This compound improves elongation of the cured product and residual surface tackiness, and, at the same time, is high in curing speed and capable of giving the cured product of high resistance to weather. It is suitable for, e.g., adhesives, tackifiers, paints, sealants, waterproof materials, spray materials, shaping materials and casting rubber materials.Type: ApplicationFiled: September 5, 2006Publication date: January 18, 2007Inventors: Takashi Hakuta, Masaaki Kawasaki, Yoshiharu Kikuchi, Mitsunao Arino, Mitsuko Nagai, Hiroaki Sakaguchi, Masaki Sugawara, Masao Kishi, Kaoru Ueno, Takashi Abe, Michio Sekine
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Publication number: 20060142437Abstract: A pellet comprising 100 parts by weight of an ethylene/?-olefin/non-conjugated polyene copolymer (A) containing a constitutional unit derived from non-conjugated polyene represented by a specific Formula, 1 to 150 parts by weight of a plasticizer (B) relative to 100 parts by weight of the above (A), and 0 to 30 parts by weight of a thermoplastic resin (C) relative to 100 parts by weight of the above (A), is obtained, and a vulcanized rubber or a thermoplastic elastomer which does not cause blocking and has excellent crosslinking reactivity and thus excellent properties can be prepared therefrom. According to a process for preparation of a thermoplastic elastomer using the above-mentioned pellet, a thermoplastic elastomer having excellent compression set or dispersibility can be economically and efficiently prepared. In particular, since it can be prepared continuously using a twin screw extruder, the process is excellent from an industrial viewpoint.Type: ApplicationFiled: March 12, 2004Publication date: June 29, 2006Inventors: Takashi Hakuta, Yoshiharu Kikuchi, Masaaki Kawasaki
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Publication number: 20050154132Abstract: The crosslinkable rubber composition of the invention is crosslinkable by hot air, and a hot-air crosslinked rubber sheet thereof has no scratch on the surface in a hardness test using a pencil of HB and has a compression set of not more than 70% after a heat treatment at 150° C. for 22 hours. The rubber composition comprises an ethylene/?-olefin/non-conjugated polyene random copolymer rubber comprising a specific vinyl end group-containing norbornene compound, a SiH group-containing compound having at least two SiH groups in one molecule, and if necessary, an addition reaction catalyst comprising a platinum group element and a reaction inhibitor. The automobile weatherstrip, hose, rubber vibration insulator, belt, sealing material, expanded product, covered electric wire, electric wire joint, electric insulating part and household rubber product according to the invention comprise the above-mentioned rubber composition.Type: ApplicationFiled: December 3, 2004Publication date: July 14, 2005Applicant: Mitsui Chemicals, Inc.Inventors: Takashi Hakuta, Masaaki Kawasaki, Yoshiharu Kikuchi, Tsutomu Nakamura, Satao Hirabayashi, Takeo Yoshida
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Publication number: 20050076757Abstract: A main spindle and a back spindle grip works W, respectively. Or, the main spindle grips one end of a work W and the back spindle grips the other end of the work W. A tool is attached to a tool spindle. By adjusting the positions of the spindles and the position of the tool spindle, the work W gripped by the main spindle and the back spindle is machined by the tool. Since tool spindle can change the direction of the tool, the work W, including both ends thereof, can be entirely machined into a complex shape. A guide bush supports the work W to prevent the work W from being bent when a lengthy work W is machined. Therefore, this lathe can entirely machine a long or short work into a complex shape.Type: ApplicationFiled: September 30, 2004Publication date: April 14, 2005Applicant: Tsugami Corporation (a Japanese corporation)Inventors: Yoshiharu Kikuchi, Shinsuke Kumakura, Hidenori Sato
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Patent number: 6864315Abstract: The crosslinkable rubber composition of the invention is crosslinkable by hot air, and a hot-air crosslinked rubber sheet thereof has no scratch on the surface in a hardness test using a pencil of HB and has a compression set of not more than 70% after a heat treatment at 150° C. for 22 hours. The rubber composition comprises an ethylene/?-olefin/non-conjugated polyene random copolymer rubber comprising a specific vinyl end group-containing norbornene compound, a SiH group-containing compound having at least two SiH groups in one molecule, and if necessary, an addition reaction catalyst comprising a platinum group element and a reaction inhibitor. The automobile weatherstrip, hose, rubber vibration insulator, belt, sealing material, expanded product, covered electric wire, electric wire joint, electric insulating part and household rubber product according to the invention comprise the above-mentioned rubber composition.Type: GrantFiled: March 14, 2000Date of Patent: March 8, 2005Assignees: Mitsui Chemicals, Inc., Shin-Etsu Chemical Co., Ltd.Inventors: Takashi Hakuta, Masaaki Kawasaki, Yoshiharu Kikuchi, Hidenari Nakahama, Taku Koda, Hiroshi Kameda, Shuichi Nonaka, Mikio Hosoya, Yuji Ishii, Mitsunao Arino, Tsutomu Nakamura, Satao Hirabayashi, Takeo Yoshida
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Patent number: 6743862Abstract: The crosslinkable rubber composition is crosslinkable at room temperature, has a gelation time at room temperature of 30 days or less, and can prepare a crosslinked rubber sheet by crosslinking the composition at room temperature, wherein the crosslinked rubber sheet has a tensile elongation of 20% or more, and is free of cracks after treatment at 40° C. in a 50 pphm ozone concentration for 96 hr. Specifically, it comprises an ethylene/&agr;-olefin/non-conjugated polyene random copolymer rubber comprising a norbornene compound having a specific vinyl end group, an SiH group-containing compound, which has at least two SiH groups in one molecule, and optionally a platinum catalyst, a reaction inhibitor and/or a silane-coupling agent. The sealing, potting and coating materials and adhesives of the present invention comprise the above rubber composition.Type: GrantFiled: February 19, 2002Date of Patent: June 1, 2004Assignee: Mitsui Chemicals, Inc.Inventors: Takashi Hakuta, Mitsunao Arino, Yoshiharu Kikuchi, Masaaki Kawasaki
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Patent number: 6654438Abstract: A control rod for a BWR according to the present invention comprises a first unit composed of a tie rod, a handle mounted on an axially upper portion of the tie rod and a lower support member or falling speed limiter mounted on a axially lower portion of the tie rod; and a second unit composed of a sheath containing therein reactivity control material, an upper end plate mounted on an axially upper portion of the sheath and a lower end plate mounted on an axially lower portion of the sheath, wherein an upper portion of the upper end plate is fixed to the handle, a lower portion of the lower end plate is fixed to the lower support member or falling speed limiter, whereby the control rod is constructed as a joined body of the first unit and the second unit.Type: GrantFiled: July 30, 2001Date of Patent: November 25, 2003Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.Inventors: Yasuyuki Gotoh, Norio Kawashima, Akira Koizumi, Yoshiharu Kikuchi
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Patent number: 6608144Abstract: The invention provides an ethylene-&agr;-olefin-unconjugated polyene random copolymer rubber having hydrolyzable silyl groups in the molecule, which is crosslinkable with air-borne moisture at room temperature and is not only useful for resin modification, but also applicable as elastic sealants and adhesives, and a method for preparing the same.Type: GrantFiled: March 23, 2001Date of Patent: August 19, 2003Assignees: Shin-Etsu Chemical Co., Ltd., Mitsi Chemicals, Inc.Inventors: Tsutomu Nakamura, Takeo Yoshida, Akira Yamamoto, Takashi Hakuta, Yoshiharu Kikuchi, Masaaki Kawasaki
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Publication number: 20030096904Abstract: The curable composition of the present invention contains (A1) a silyl-containing ethylene/&agr;-olefin/non-conjugated polyene random copolymer rubber which has a structural unit derived from a norbornene compound as the non-conjugated polyene with at least one specific vinyl group at the terminal and contains a specific hydrolyzable silyl group, and (B) a compound, other than the rubber (A1), having a hydroxyl group and/or a hydrolyzable group, e.g., (B1) a compound having a silanol group and/or a compound which can react with moisture to form a compound having a silanol group in the molecule.Type: ApplicationFiled: March 7, 2002Publication date: May 22, 2003Inventors: Takashi Hakuta, Masaaki Kawasaki, Yoshiharu Kikuchi, Mitsunao Arino, Mitsuko Nagai, Hiroaki Sakaguchi, Masaki Sugawara, Masao Kishi, Kaoru Ueno, Takashi Abe, Michio Sekine
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Publication number: 20030053581Abstract: A control rod for a BWR according to the present invention comprises a first unit composed of a tie rod, a handle mounted on an axially upper portion of the tie rod and a lower support member or falling speed limiter mounted on a axially lower portion of the tie rod; and a second unit composed of a sheath containing therein reactivity control material, an upper end plate mounted on an axially upper portion of the sheath and a lower end plate mounted on an axially lower portion of the sheath, wherein an upper portion of the upper end plate is fixed to the handle, a lower portion of the lower end plate is fixed to the lower support member or falling speed limiter, whereby the control rod is constructed as a joined body of the first unit and the second unit.Type: ApplicationFiled: July 15, 2002Publication date: March 20, 2003Inventors: Yasuyuki Gotoh, Norio Kawashima, Akira Koizumi, Yoshiharu Kikuchi
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Publication number: 20030013818Abstract: The crosslinkable rubber composition is crosslinkable at room temperature, has a gelation time at room temperature of 30 days or less, and can prepare a crosslinked rubber sheet by crosslinking the composition at room temperature, wherein the crosslinked rubber sheet has a tensile elongation of 20% or more, and is free of cracks after treatment at 40° C. in a 50 pphm ozone concentration for 96 hr. Specifically, it comprises an ethylene/&agr;-olefin/non-conjugated polyene random copolymer rubber comprising a norbornene compound having a specific vinyl end group, an SiH group-containing compound, which has at least two SiH groups in one molecule, and optionally a platinum catalyst, a reaction inhibitor and/or a silane-coupling agent. The sealing, potting and coating materials and adhesives of the present invention comprise the above rubber composition.Type: ApplicationFiled: February 19, 2002Publication date: January 16, 2003Inventors: Takashi Hakuta, Mitsunao Arino, Yoshiharu Kikuchi, Masaaki Kawasaki
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Patent number: 6391413Abstract: The present invention provides a raw rubber lapping film formed of an ethylene·&agr;-olefin random copolymer comprising ethylene unit and an &agr;-olefin unit having 4 to 20 carbon atoms and a raw rubber bale lapped with this film. Since the film is superior in strength and release properties and has good dispersibility in ethylene·&agr;-olefin copolymer rubber, the operation of lapping raw rubber with a film, the operation of stripping a film from a lapped raw rubber bale and the operation of separating each of a plurality of raw rubber bales are carried out easily and yet there is no adverse effect on the subsequent rubber processing step without stripping the film by heating at a temperature higher than the melting point of the film at the time of kneading.Type: GrantFiled: February 28, 2000Date of Patent: May 21, 2002Assignee: Mitsui Chemicals IncInventors: Keiji Okada, Yoshiharu Kikuchi, Takashi Hakuta
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Patent number: 6333955Abstract: To reduce the manufacturing processes of a control rod and shorten the time required for manufacturing a control rod, for the lower part support member 7, the thin parts 11A and 11B are formed in the neighborhood of each of the left and right sides of the window 8. In the left and right sides of the pull-up handle 9, the grooves 17A and 17B are formed respectively. The groove 17B is deeper than the groove 17A. The thin part 11A is fitted into the groove 17A and the thin part 11B is fitted into the groove 17B. The gap formed between the end of the thin part 11B and the bottom of the groove 17B is larger than the gap formed between the end of the thin part 11A and the bottom of the groove 17A. Therefore, the thin part 11A can be simply fitted into the groove 17A.Type: GrantFiled: January 27, 2000Date of Patent: December 25, 2001Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.Inventors: Norio Kawashima, Yasuyuki Gotoh, Yasuhiro Aizawa, Akira Koizumi, Kouichi Machida, Yoshiharu Kikuchi
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Patent number: 6028906Abstract: The present invention relates to a control rod installed in a boiling water reactor (BWR), and particularly to a control rod using metal. An object of the present invention is to provide a manufacturing method of a control rod for a boiling water reactor, having excellent corrosion resistance in high temperature water and excellent wear resistance at the time of fabrication, and in which the influence of the manufacturing process is slight. In order to achieve the above described object, the present invention provides a manufacturing method of a control rod for a boiling water reactor constructed with sheaths having a U-shaped cross section attached to each end of a tie rod having a cruciform cross section, and rod, plate or oval tube cross section metal hafnium type neutron absorber material contained inside the sheaths, in which an anodized film is provided on a surface of the neutron absorber material as a pre-process of assembly of the neutron absorber material in the structure of the control rod.Type: GrantFiled: August 17, 1998Date of Patent: February 22, 2000Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.Inventors: Norio Kawashima, Yasuyuki Gotoh, Akira Koizumi, Kouichi Machida, Yoshiharu Kikuchi, Takayoshi Yasuda, Yoshitaka Nishino
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Patent number: 5470919Abstract: A chlorinated ethylene/.alpha.-olefin copolymer rubber which is a chlorinated product of an ethylene/.alpha.-olefin copolymer rubber having a vinylidene bond at the terminal of the molecule, the number of said vinylidene bond being 0.05 to 1.00 per 1,000 carbon atoms, which has a chlorine content of 20 to 40% by weight, and which has a Mooney viscosity [ML.sub.1+4 (121.degree. C.)] of 10 to 190; and a composition comprising the chlorinated ethylene/.alpha.-olefin copolymer rubber, (a) a reinforcing agent, (b) a softening agent, and (c) a vulcanizing agent.Type: GrantFiled: July 26, 1994Date of Patent: November 28, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Tetsuo Tojo, Muneyuki Matsumoto, Yoshiharu Kikuchi
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Patent number: 5310818Abstract: A vulcanizable rubber composition containing (i) (A) a chlorine-containing rubber and (B) a triazinethiol.amine salt or (ii) (a) a chlorine-containing rubber, (b) a triazinethiol as a vulcanization agent, and (c), as a vulcanization agent, (c-1) an aromatic carboxylic acid amine salt, (c-2) an aliphatic carboxylic acid amine salt, and (c-3) a phenolamine salt.Type: GrantFiled: November 24, 1992Date of Patent: May 10, 1994Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Tetsuo Tojo, Keiji Okada, Takashi Nakahara, Yoshiharu Kikuchi
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Patent number: 5237010Abstract: Chlorinated ethylene-.alpha.-olefin copolymer rubber of the present invention is characterized in that the content of chlorine bonded to primary carbon atom is 0.6% by weight or more and the content of chlorine bonded to tertiary carbon atom is 1.6% by weight or less. This chlorinated ethylene-.alpha.-olefin copolymer rubber has a high vulcanization speed and excels in heat resistance. Additionally, this thermoplastic elastomer composition consisting of this vulcanizate and crystalline polyolefin resin particularly excels in moldability and processibility.Type: GrantFiled: October 8, 1992Date of Patent: August 17, 1993Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Tetsuo Tojo, Keiji Okada, Yoshiharu Kikuchi, Yasuhiko Otawa, Toshiyuki Maeda, Katsuo Okamoto