Patents by Inventor Akio Hiraki
Akio Hiraki 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: 8518542Abstract: The present invention provides a carbon film that is remarkably excellent in current voltage (IV) characteristics. This is achieved by way of a carbon film structure, two or more carbon film assembly units 12 are formed on a substrate 10. The carbon film assembly units 12 comprise: a stem-like carbon film 14 which is made into a film in the shape of a long and thin needle; and a branch-like carbon film cluster 16 which is made into a film so as to surround the stem-like carbon film 14 from the halfway to the lower part of this stem-like carbon film 14. The stem-like carbon film 14 has the shape of a long and thin needle having a configuration which has a spiral streak-like step part 18 towards the distal end at the circumference face of a near tip and in which the radius becomes small as going to the distal end.Type: GrantFiled: May 26, 2009Date of Patent: August 27, 2013Assignee: Life Technology Research Institute, Inc.Inventors: Akio Hiraki, Masanori Haba, Hong-Xing Wang
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Patent number: 8421330Abstract: A carbon film of the present invention has an elongated needle shape whose radius decreases toward a tip. The shape is, preferably, a shape in which a field concentration coefficient ? in the Fowler-Nordheim equation is expressed by h/r where r denotes the radius in an arbitrary position and h denotes height from the arbitrary position to the tip.Type: GrantFiled: October 26, 2010Date of Patent: April 16, 2013Assignee: Pureron Japan Co., LtdInventors: Masanori Haba, Nan Jiang, Hong-Xing Wang, Akio Hiraki
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Publication number: 20110037375Abstract: A carbon film of the present invention has an elongated needle shape whose radius decreases toward a tip. The shape is, preferably, a shape in which a field concentration coefficient ? in the Fowler-Nordheim equation is expressed by h/r where r denotes the radius in an arbitrary position and h denotes height from the arbitrary position to the tip.Type: ApplicationFiled: October 26, 2010Publication date: February 17, 2011Applicant: PURERON JAPAN CO., LTD.Inventors: Masanori HABA, Nan Jiang, Hong-Xing Wang, Akio Hiraki
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Publication number: 20100304077Abstract: The present invention provides a carbon film that is remarkably excellent in current voltage (IV) characteristics. This is achieved by way of a carbon film structure, two or more carbon film assembly units 12 are formed on a substrate 10. The carbon film assembly units 12 comprise: a stem-like carbon film 14 which is made into a film in the shape of a long and thin needle; and a branch-like carbon film cluster 16 which is made into a film so as to surround the stem-like carbon film 14 from the halfway to the lower part of this stem-like carbon film 14. The stem-like carbon film 14 has the shape of a long and thin needle having a configuration which has a spiral streak-like step part 18 towards the distal end at the circumference face of a near tip and in which the radius becomes small as going to the distal end.Type: ApplicationFiled: May 26, 2009Publication date: December 2, 2010Applicant: LIFE TECHNOLOGY RESEARCH INSTITUTE, INC.Inventors: Hong-Xing Wang, Akio Hiraki, Masanori Haba
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Patent number: 7839067Abstract: A carbon film of the present invention has an elongated needle shape whose radius decreases toward a tip. The shape is, preferably, a shape in which a field concentration coefficient ? in the Fowler-Nordheim equation is expressed by h/r where r denotes the radius in an arbitrary position and h denotes height from the arbitrary position to the tip.Type: GrantFiled: August 9, 2006Date of Patent: November 23, 2010Assignee: Pureron Japan Co., Ltd.Inventors: Masanori Haba, Nan Jiang, Hong-Xing Wang, Akio Hiraki
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Publication number: 20090266703Abstract: Problem: To generate long plasma easily at low cost and to perform a plurality of film deposition methods using a single plasma generating device. Means for Solving the Problem A plasma generating device is provided with, in the vacuum inside thereof, a cylindrical electrode comprising an opening in a part thereof and generating plasma therein when gas is introduced thereinto and a direct-current negative voltage is applied thereto.Type: ApplicationFiled: July 31, 2006Publication date: October 29, 2009Inventors: Nan Jiang, Hong-Xing Wang, Akio Hiraki, Masanori Haba
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Patent number: 7468579Abstract: A carbon fiber mixed paper 8 obtained by mixing a fiber blend 7, which is obtained by knitting a carbon fiber and a glass fiber, into a paper material is used as the material for an anode that opposes to an electron emission cathode. A phosphor is applied onto this carbon fiber mixed paper 8, and further, an electrode 9 is provided. The present invention reduces heat generation at the anode as much as possible and enables uniform illumination without providing a diffuser. Moreover, the present invention does not require an electrode made of a transparent conductive film.Type: GrantFiled: February 10, 2005Date of Patent: December 23, 2008Assignee: Dialight Japan Co., Ltd.Inventor: Akio Hiraki
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Patent number: 7198738Abstract: The present invention provides a cesium-lithium-borate crystal, which can be used as a high-performance wavelength converting crystal, having a chemical composition expressed as CsLiB6O10, and substituted cesium-lithium-borate crystals expressed by the following formula: Cs1?xLi1?yMx+yB6O10 or Cs2(1?z)Li2LzB12O20 (where, M is an alkali metal element, and L is an alkali earth metal element); a method for manufacturing same by heating and melting; and an optical apparatus using such crystals.Type: GrantFiled: December 23, 2005Date of Patent: April 3, 2007Assignee: Research Development Corporation of JapanInventors: Takatomo Sasaki, Akio Hiraki, Yusuke Mori, Sadao Nakai
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Publication number: 20070035227Abstract: A carbon film of the present invention has an elongated needle shape whose radius decreases toward a tip. The shape is, preferably, a shape in which a field concentration coefficient ? in the Fowler-Nordheim equation is expressed by h/r where r denotes the radius in an arbitrary position and h denotes height from the arbitrary position to the tip.Type: ApplicationFiled: August 9, 2006Publication date: February 15, 2007Inventors: Masanori Haba, Nan Jiang, Hong-Xing Wang, Akio Hiraki
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Publication number: 20060165578Abstract: The present invention provides a cesium-lithium-borate crystal, which can be used as a high-performance wavelength converting crystal, having a chemical composition expressed as CsLiB6O10, and substituted cesium-lithium-borate crystals expressed by the following formula: Cs1-xLi1-yMx+yB6O10 or Cs2(1?z)Li2LzB12O20 (where, M is an alkali metal element, and L is an alkali earth metal element); a method for manufacturing same by heating and melting; and an optical apparatus using such crystals.Type: ApplicationFiled: December 23, 2005Publication date: July 27, 2006Inventors: Takatomo Sasaki, Akio Hiraki, Yusuke Mori, Sadao Nakai
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Publication number: 20050275329Abstract: This field electron emission device comprises a linear conductor wire having concave/convex on its surface and an electron emitter having electron conductivity formed on the concave/convex surface of the conductor wire. Preferably, the concave/convex is formed by a channeling performed to the surface of the conductor wire. Preferably, the electron emitter is composed of microscopic linear materials composed of selected one or combination of carbon nano-tube, carbon nano-wall, carbon fiber, graphite fiber, amorphous carbon fiber and diamond fiber.Type: ApplicationFiled: December 3, 2004Publication date: December 15, 2005Inventors: Akio Hiraki, Masanori Haba
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Publication number: 20050134162Abstract: A carbon fiber mixed paper 8 obtained by mixing a fiber blend 7, which is obtained by knitting a carbon fiber and a glass fiber, into a paper material is used as the material for an anode that opposes to an electron emission cathode. A phosphor is applied onto this carbon fiber mixed paper 8, and further, an electrode 9 is provided. The present invention reduces heat generation at the anode as much as possible and enables uniform illumination without providing a diffuser. Moreover, the present invention does not require an electrode made of a transparent conductive film.Type: ApplicationFiled: February 10, 2005Publication date: June 23, 2005Inventor: Akio Hiraki
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Publication number: 20030030039Abstract: The present invention provides a cesium-lithium-borate crystal, which can be used as a high-performance wavelength converting crystal, having a chemical composition expressed as CsLiB6O10, and substituted cesium-lithium-borate crystals expressed by the following formula:Type: ApplicationFiled: August 15, 2002Publication date: February 13, 2003Inventors: Takatomo Sasaki, Akio Hiraki, Yusuke Mori, Sadao Nakai
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Patent number: 6337060Abstract: The principal objects of the invention is to provide diamond fine particles with a surface nature so improved as to form a stable, uniform suspension or dispersion in a common medium such as water and alcohol. Another object is to provide an effective technique for producing hydrophilic diamond fine particles by chemically modifying the particle surface nature, while removing at the same time contaminants and foreign materials which coexist with the diamond. In the invention, diamond particles are treated by boiling in the treatment fluid of sulfuric acid solution, which is in particular of concentrated or fuming nature, at a temperature more than 200° C., which is preferably 250° C. or more.Type: GrantFiled: June 12, 1996Date of Patent: January 8, 2002Assignees: The Ishizuka Research Institute, Ltd.Inventors: Akio Hiraki, Toshimichi Ito, Akimitsu Hatta, Hiroshi Makita, Kazuhito Nishimura, Hiroshi Ishizuka, Satoru Hosomi
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Publication number: 20020000541Abstract: The present invention provides a cesium-lithium-borate crystal, which can be used as a high-performance wavelength converting crystal, having a chemical composition expressed as CsLiB6O10, and substituted cesium-lithium-borate crystals expressed by the following formula:Type: ApplicationFiled: July 3, 2001Publication date: January 3, 2002Inventors: Takatomo Sasaki, Akio Hiraki, Yusuke Mori, Sadao Nakai
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Patent number: 6296784Abstract: The present invention provides a cesium-lithium-borate crystal, which can be used as a high-performance wavelength converting crystal, having a chemical composition expressed as CsLiB6O10, and substituted cesium-lithium-borate crystals expressed by the following formula: Cs1−xLi1−yMx+yB6O10 or Cs2(1−z)Li2LzB12O20 (where, M is an alkali metal element, and L is an alkali earth metal element); a method for manufacturing same by heating and melting; and an optical apparatus using such crystalsType: GrantFiled: July 17, 1995Date of Patent: October 2, 2001Assignee: Research Development Corporation of JapanInventors: Takatomo Sasaki, Akio Hiraki, Yusuke Mori, Sadao Nakai
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Patent number: 6008502Abstract: The present invention provides an electron emitting device for efficiently emitting electron beams by applying a forward bias to an MIS, pn, and a pin structure using a diamond layer so as to supply electrons from an electron supply layer to a p-type diamond layer. Furthermore, the present invention provides a method for easily and efficiently performing important production processes for producing a highly efficient electron emitting device having a diamond layer and controlling a surface state of the diamond layer. A multi-layer structure including an electrode layer, an electron supply layer and a diamond layer is used as the structure thereof. Alternatively, the electron affinity state of the surface of the diamond layer is arbitrarily controlled by a method such as ultraviolet ray irradiation.Type: GrantFiled: November 3, 1997Date of Patent: December 28, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masahiro Deguchi, Akio Hiraki, Toshimichi Ito, Akimitsu Hatta, Nobuhiro Eimori, Makoto Kitabatake
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Patent number: 5879419Abstract: The method for producing a superheavy oil emulsion fuel includes the steps of (a) adding to a superheavy oil 0.1 to 0.6 parts by weight of a nonionic surfactant having an HLB (hydrophilic-lipophilic balance) of 13 to 19, based on 100 parts by weight of the superheavy oil, and water, to prepare a homogeneous liquid mixture; and (b) mechanically mixing the homogeneous liquid mixture with a high shearing stress, to produce a superheavy oil emulsion fuel having a particle size distribution. In this method, a 10% cumulative particle size is from 1.5 to 8 .mu.m, a 50% cumulative particle size is from 11 to 30 .mu.m, and a 90% cumulative particle size is from 25 to 150 .mu.m, and coarse particles having particle sizes of 150 .mu.m or more occupy 3% by weight or less in the entire emulsion fuel, and the concentration of the superheavy oil is from 76.5 to 82.0% by weight.Type: GrantFiled: December 1, 1997Date of Patent: March 9, 1999Assignees: Kao Corporation, Mitsubishi Jukogyo Kabushiki KaishaInventors: Noboru Moriyama, Akio Hiraki, Toshimitsu Ichinose, Koichi Sakamoto
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Patent number: 5851245Abstract: A method for producing a superheavy oil emulsion fuel comprising the steps of (i) preparing a liquid mixture comprising a superheavy oil, water, one or more nonionic surfactants having an HLB (hydrophilic-lipophilic balance) of 13 to 19, and optionally one or more stabilizers, and then agitating the resulting liquid mixture with a high shear rate of 1000/sec to 60000/sec, to give an oil-in-water (O/W) type emulsion fuel having a superheavy oil concentration of from 74 to 82% by weight; and (ii) adding at least one of ionic dispersants, and optionally water, to the emulsion fuel obtained in step (i), and then blending and agitating the resulting liquid mixture with a shear rate of 10/sec to 10000/sec, to give an oil-in-water (O/W) type emulsion fuel having a superheavy oil concentration of from 68 to 79% by weight. In step (i), the nonionic surfactants are contained in an amount of from 0.1 to 0.8% by weight of the emulsion fuel obtained in step (i), and the stabilizers are contained in an amount of from 0.Type: GrantFiled: May 23, 1997Date of Patent: December 22, 1998Assignees: Kao Corporation, Mitsubishi Heavy Industries, Ltd.Inventors: Noboru Moriyama, Akio Hiraki, Toshimitsu Ichinose, Koichi Sakamoto
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Patent number: 5816790Abstract: A heavy oil emulsified fuel combustion furnace is provided which prevents lowering of combustion efficiency due to water content in the fuel as well as prevents elevation of sulfuric acid dew point due to water content in the flue gas of the combustion furnace. In the apparatus a heavy oil emulsified fuel (102) is heated by a heater (110) using a heat pipe etc. and then is separated by a water vaporizer (120) into heavy oil (122) and vapor (121) consisting of steam and a light oil combustible gas. The heavy oil (122) is supplied to a burner port of the combustion furnace, such as a boiler etc. The vapor (121) is condensed by a condenser (140) to produce liquid (141) comprising a mixture of water and light oil. The liquid (141) is separated by an oily water separator (150) into oil (151) and water (152). The oil (151) is used as a fuel for an igniting torch of the combustion furnace 10 and the water (152) is used partially as cooling water (41) for an SO.sub.Type: GrantFiled: July 31, 1996Date of Patent: October 6, 1998Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Toshimitsu Ichinose, Kimishiro Tokuda, Akio Hiraki, Yuichi Hino, Kan Ogata, Tsutomu Hashimoto, Shozo Kaneko