Patents by Inventor Takenori Nakayama
Takenori Nakayama 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: 11920685Abstract: A valve device includes a rotation shaft, a valve body, and a biasing portion. The valve body is configured to be rotationally displaceable about the rotation shaft between a closed position and an open position. The biasing portion biases the valve body so as to cause the valve body to approach the closed position. The valve body includes an upstream wall arranged in a position upstream of the rotation shaft in a flow direction of the fluid when the valve body is in the closed position. The valve body includes a rotation end, which is an end distal from the rotation shaft and moves downstream in the flow direction of the fluid in response to a displacement of the valve body from the closed position to the open position, and the rotation end is shaped to project upstream when the valve body is in the closed position.Type: GrantFiled: November 15, 2022Date of Patent: March 5, 2024Assignee: FUTABA INDUSTRIAL CO., LTD.Inventors: Takenori Nakayama, Hiroaki Yokoyama, Yuta Asano
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Publication number: 20230167907Abstract: A valve device includes a rotation shaft, a valve body, and a biasing portion. The valve body is configured to be rotationally displaceable about the rotation shaft between a closed position and an open position. The biasing portion biases the valve body so as to cause the valve body to approach the closed position. The valve body includes an upstream wall arranged in a position upstream of the rotation shaft in a flow direction of the fluid when the valve body is in the closed position. The valve body includes a rotation end, which is an end distal from the rotation shaft and moves downstream in the flow direction of the fluid in response to a displacement of the valve body from the closed position to the open position, and the rotation end is shaped to project upstream when the valve body is in the closed position.Type: ApplicationFiled: November 15, 2022Publication date: June 1, 2023Inventors: Takenori Nakayama, Hiroaki Yokoyama, Yuta Asano
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Publication number: 20180363120Abstract: A coated particle includes a surface of a base material particle which is coated with carbon particles. The carbon particles are produced by a step of disposing an explosive substance which shows a liquid state at normal temperature and normal pressure in a periphery of a raw material substance containing an aromatic compound having three or more nitro groups, and a step of detonating the explosive substance.Type: ApplicationFiled: November 30, 2016Publication date: December 20, 2018Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Ryutaro WADA, Masaya UEDA, Takenori NAKAYAMA
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Patent number: 7951466Abstract: A titanium alloy material includes a Ti—Al alloy and an oxide film on the Ti—Al alloy. The Ti—Al alloy contains 0.50-3.0 mass % Al and a balance of Ti and unavoidable impurities. The titanium alloy material has excellent hydrogen absorption resistance and can be used as a basic structural material in hydrogen absorption environments.Type: GrantFiled: February 6, 2003Date of Patent: May 31, 2011Assignee: Kobe Steel, Ltd.Inventors: Shinji Sakashita, Takashi Yashiki, Katsuhiro Matsukado, Takenori Nakayama
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Patent number: 7244452Abstract: Disclosed is a member which is superior in anti-fungus property and anti-alga property, and is coated with a surface treatment coating comprising at least a layer having anti-fungus property and/or anti-alga property laminated between a topmost surface functional layer and a base, wherein the layer having anti-fungus property and/or anti-alga property comprises 80% or more of Ni, 0.1 to 10% of P, and 0.0001 to 1% of hydrogen, holes reaching the surface of the layer having anti-fungus property and/or anti-alga property are present in the topmost surface functional layer so as to penetrate the topmost surface functional layer, the opening area ratio thereof to the total area when the topmost surface functional layer is viewed in plan being from 0.001 to 10%, or the elution amount of Ni is from 0.1 to 50 ?g/cm2/week when the member is immersed in still water at 30° C.Type: GrantFiled: August 15, 2002Date of Patent: July 17, 2007Assignee: Kobe Steel, Ltd.Inventors: Wataru Urushihara, Takenori Nakayama, Sadako Yamada
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Publication number: 20050260433Abstract: A titanium alloy scarcely undergoing brittling caused by hydrogen even in case of being used under hydrogen-absorbing conditions. This alloy comprises a Ti—Al alloy composed of from 0.50 to 3.0% of Al with the balance of Ti together with unavoidable contaminants. A Ti—Al alloy material excellent in hydrogen absorption-resistance wherein an oxidized film of 1.0 to 100 nm in thickness is formed on a bulk made of a Ti—Al alloy satisfying the chemical composition as described above, and, further, a concentrated Al layer having an Al concentration of 0.8 to 25% higher by 0.3% or more than the bulk is optionally formed between the bulk and the oxidized film.Type: ApplicationFiled: February 6, 2003Publication date: November 24, 2005Applicant: KABUSHIKI KAISHA KOBE SEIKO SHOInventors: Shinji Sakashita, Takashi Yashiki, Katsuhiro Matsukado, Takenori Nakayama
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Publication number: 20040173300Abstract: A rubber-bonded brass composite material prepared by bonding rubber to the surface of a brass-plated material obtained by plating the surface of a substrate with brass or to the surface of a brass material by vulcanization, wherein preheating is carried out before vulcanization to form needle-like Cu—S-based reaction products at the bonding interface between brass and rubber. Thereby, there is provided a rubber-bonded brass composite material having excellent long-term adhesion while excellent initial adhesion at the time of bonding by vulcanization is retained.Type: ApplicationFiled: March 2, 2004Publication date: September 9, 2004Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd.)Inventors: Tatsuya Yasunaga, Hisashi Mitamura, Takenori Nakayama
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Publication number: 20040047899Abstract: Disclosed is a member which is superior in anti-fungus property and anti-alga property, and is coated with a surface treatment coating comprising at least a layer having anti-fungus property and/or anti-alga property laminated between a topmost surface functional layer and a base, wherein the layer having anti-fungus property and/or anti-alga property comprises 80% or more of Ni, 0.1 to 10% of P, and 0.0001 to 1% of hydrogen, holes reaching the surface of the layer having anti-fungus property and/or anti-alga property are present in the topmost surface functional layer so as to penetrate the topmost surface functional layer, the opening area ratio thereof to the total area when the topmost surface functional layer is viewed in plan being from 0.001 to 10%, or the elution amount of Ni is from 0.1 to 50 &mgr;g/cm2/week when the member is immersed in still water at 30° C.Type: ApplicationFiled: July 24, 2003Publication date: March 11, 2004Inventors: Wataru Urushihara, Takenori Nakayama, Sadako Yamada
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Patent number: 6313064Abstract: A copper alloy comprising 0.1-7.3% of titanium and optionally comprising one or more of zinc, silicon and silver in amounts of 0.001-10%, 0.001-3% and 0.001-1%, respectively, wherein its surface layer contains an oxide containing titanium. This copper alloy exhibits sterilizing effect based on copper and antibacterial effect based on optical catalyst function resulting from the oxide which contains titanium dispersed in the surface layer. The oxide containing titanium can be produced by heating the copper alloy which has the above-mentioned composition and is produced in the usual manner to 200-800° C. to oxidize titanium preferentially. In the case that zinc and silicon are contained, these elements are also preferentially oxidized by the heating, so as to produce oxides. Thus, zinc exhibits antibacterial effect and sterilizing effect. Silicon exhibits hydrophilicity. Silver exhibits sterilizing effect.Type: GrantFiled: June 25, 1999Date of Patent: November 6, 2001Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Motohisa Miyafuji, Yoshinobu Tsuzaki, Sadako Yamada, Takenori Nakayama, Wataru Urushihara
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Patent number: 6218027Abstract: A steel suitable for a fabric with or without painting and has good corrosion resistance with reproducibility, even if the steel is composed mainly of ordinary carbon steel or low alloy steel, wherein the surface of the steel is coated with rust comprising one or more selected from Ti, Nb, Ta, Zr, V and Hf in the total amount of 0.01 wt % or more. In the steel, the fraction of &agr;-FeOOH and an amorphous rust is 35 wt % or more, and the fraction of &bgr;-FeOOH is 20 wt % or less.Type: GrantFiled: August 27, 1999Date of Patent: April 17, 2001Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd)Inventors: Fumio Yuse, Takenori Nakayama, Toshiaki Kan
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Patent number: 6146768Abstract: A welding wire capable of improving wettability between weld metal and wire surface, thereby providing excellent drawability and weldability in resistance welding of wires is provided. A wire is dipped in an aqueous solution of a sulfide of alkali metal or ammonium sulfide to generate iron sulfide (FeS.sub.2 or FeS) on the surface, whereby the wettability of weld metal to wire surface is improved in the resistance welding of the resulting wires. The S in the iron sulfide is preferably present in an amount of 0.1-20 atomic % as measured by X-ray photoelectron spectroscopy. At least one sulfide of S with an element of Mn, Ti, Cu, Cr, Ni, Al or Zn can be used instead of or in addition to the iron sulfide.Type: GrantFiled: March 10, 1998Date of Patent: November 14, 2000Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Norio Masaie, Hiroyuki Shimizu, Kuniaki Miyazaki, Takenori Nakayama, Shinji Sakashita
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Patent number: 6068938Abstract: An Mg based article excellent in plating adhesion which is produced with an Mg alloy base material regardless of its kind by forming a Zn layer of an average thickness of 0.60 .mu.m or more, or a Zn deposition of 0.43 mg/cm.sup.2 or more formed on the Mg alloy base material and a method of producing the article with good efficiency are provided.Type: GrantFiled: April 14, 1998Date of Patent: May 30, 2000Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Jun Kato, Wataru Urushihara, Takenori Nakayama
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Patent number: 5846344Abstract: Disclosed is a spring steel for a high corrosion resistant and high strength, which exhibits an excellent drawability without softening heat treatment after hot rolling, and which has a strength of 1900 MPa or more by quenching and tempering and an excellent corrosion resistance. The spring steel contains elements of C, Si, Mn and Cr, and elements of Ni and/or Mo in suitable amounts, the balance being essentially Fe and inevitable impurities, wherein the elements satisfy the following requirement:2.5.ltoreq.(FP).ltoreq.4.52.0.ltoreq.(FP/log D).ltoreq.4.0where D is a diameter (mm) of the rolled material,and FP=(0.23?C!+0.1).times.(0.7?Si!+1).times.(3.5?Mn!+1) .times.(2.2?Cr!+1).times.(0.4?Ni!+1).times.(3?Mo!+1) in which ?element! represents mass % of the element.Type: GrantFiled: January 26, 1996Date of Patent: December 8, 1998Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Yasunobu Kawaguchi, Masataka Shimotsusa, Kan Momozaki, Takenori Nakayama, Shigeaki Miyauchi, Yoshinori Yamamoto, Norio Ohkouchi
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Patent number: 5776267Abstract: The present invention provides a spring steel with excellent performance, characterized in that the spring steel is produced by making a spring steel contain an appropriate amount of at least one or more of Ti, Nb, Zr, Ta, and Hf, thereby generating fine inclusions including carbide, nitride, sulfides and/or their complex compounds, to make the inclusions exert the effect of trapping diffusive hydrogen whereby the resistance to hydrogen embrittlement is enhanced, wherein the size and number of the coarse inclusions are regulated, thereby suppressing the decrease of the fatigue life. The spring steel can provide a valve spring or a suspension spring or the like, with enhanced strength and higher stress resistance, together with improved resistance to hydrogen embrittlement and fatigue.Type: GrantFiled: October 9, 1996Date of Patent: July 7, 1998Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Shigenobu Nanba, Hiroshi Yaguchi, Masataka Shimotsusa, Nobuhiko Ibaraki, Takenori Nakayama, Takashi Iwata, Yoshinori Yamamoto, Norio Ohkouchi, Mamoru Nagao
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Patent number: 5545268Abstract: Disclosed is a method of manufacturing a surface treated metal member excellent in wear resistance, comprising the steps of: applying Ni--P electroplating on the surface of a metal base member and heat-treating the metal base member; and blasting, on the surface of the metal base member, fine particles having nearly spherical shapes and having an average particle size of 10-400 .mu.m.Type: GrantFiled: May 23, 1995Date of Patent: August 13, 1996Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Takashi Yashiki, Yasunori Wada, Hidenori Nishimoto, Yoshinori Terada, Takenori Nakayama, Tadashi Abumiya
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Patent number: 5508002Abstract: Disclosed is a spring steel for a high corrosion resistant and high strength, which exhibits an excellent drawability without softening heat treatment after hot rolling, and which has a strength of 1900 MPa or more by quenching and tempering and an excellent corrosion resistance. The spring steel contains elements of C, Si, Mn and Cr, and elements of Ni and/or Mo in suitable amounts, the balance being essentially Fe and inevitable impurities, wherein the elements satisfy the following requirement:2.5.ltoreq.(FP).ltoreq.4.52.0.ltoreq.(FP/log D).ltoreq.4.0where D is a diameter (mm) of the rolled material, and FP=(0.23[C]+0.1).times.(0.7[Si]+1).times.(3.5[Mn]+1).times.(2.2[Cr]+1).tim es.(0.4[Ni]+1).times.(3[Mo]+1) in which [element] represents mass % of the element.Type: GrantFiled: November 3, 1994Date of Patent: April 16, 1996Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Yasunobu Kawaguchi, Masataka Shimotsusa, Kan Momozaki, Takenori Nakayama, Shigeaki Miyauchi, Yoshinori Yamamoto, Norio Ohkouchi
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Patent number: 5496651Abstract: A machine part comprises: a base part formed of a titanium alloy or an aluminum alloy and having a roughened surface of Ra 0.5 .mu.m or above and PPI.sub.50 or above; and a Ni--P electrodeposit layer formed over the surface of the base part by an electroplating process using a Ni--P plating bath containing a stress relaxing agent, and having a stress of 20 kgf/mm.sup.2 or below. The machine part has a small specific gravity, excellent seizure resistance, wear resistance and fatigue strength.Type: GrantFiled: February 13, 1995Date of Patent: March 5, 1996Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Hidetoshi Nishimoto, Yasuaki Sugizaki, Kenji Umei, Hiroshi Satoh, Yoshinori Terada, Tatsuya Yasunaga, Takenori Nakayama, Yasunori Wada, Keiji Ueda
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Patent number: 5330851Abstract: A corrosion resistant Al or Al alloy material on the surface of which multi-layer deposits for improved corrosion resistance. The deposits are obtained by laminating more than five layers of unit periodic layers with a thickness of 100 .ANG. or less in which two, or three or more layers of unit deposits, comprised of specific elements, are laminated. Such multi-layer structure can prevent water, chloride and other corrosion accelerating substances from passing through the deposits and reaching the surface of the base material, thus effectively preventing the corrosion of Al or Al alloy.Type: GrantFiled: April 22, 1993Date of Patent: July 19, 1994Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Takenori Nakayama, Toyohiko Konno
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Patent number: 5286312Abstract: Disclosed is a high-strength spring steel containing C, Si, Mn, Ni, Cr, Mo, V and the like within the specified range, wherein the above components satisfy the following equation:550-333[C]-34[Mn]-20[Cr]-17[Ni]-11[Mo].gtoreq. 300where [C, Mn, Cr, Ni, or Mo] represents wt % of each component, and the average diameter of the non-metallic inclusions of oxides is specified. By use of the above steel, there can be obtained a high-strength spring steel having a tensile strength of 200 kgf/mm.sup.2 or more and being excellent in the fatigue characteristic and the sag resistance. Further, in the above steel, each content of C, Si, Ni, and Cr may be added to satisfies the following equation:50[Si]+25[Ni]+40[Cr]-100[C].gtoreq. 230where [Si, Ni, Cr or C] represents wt % of each component. Thus the corrosion fatigue characteristic is also improved.Type: GrantFiled: October 2, 1992Date of Patent: February 15, 1994Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Masataka Shimotsusa, Masao Toyama, Sinichi Ohnishi, Takahiko Nagamatsu, Takenori Nakayama
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Patent number: 4820486Abstract: The present invention relates to low alloy steel and specifically to nickel-chrome-molybdenum steel.A low alloy steel having excellent stress corrosion cracking resistance containing C:.ltoreq.0.40%, Si:.ltoreq.0.15%, Mn:.ltoreq.0.20%, P:.ltoreq.0.010%, S:.ltoreq.0.030%, Ni: 0.50 to 4.00%, Cr: 0.50 to 2.50%, Mo: 0.25 to 4.00% and V:.ltoreq.0.30%, said Si, Mn and P being fulfilled with relationship of Si+Mn+20P.ltoreq.0.30%, the remainder comprising Fe and unavoidable impurities, the prior austenite crystal grain size being in excess of 4 of ASTM crystal grain size number.Type: GrantFiled: March 31, 1986Date of Patent: April 11, 1989Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Kazutoshi Shimogori, Kazuo Fujiwara, Kiyoshi Sugie, Kikuo Morita, Takenori Nakayama, Mutsuhiro Miyakawa, Yasushi Torii