Patents by Inventor Mamoru Nakano
Mamoru Nakano 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: 8518352Abstract: The invention concern an apparatus and a method for manufacturing polycrystalline silicon having a reduced amount of boron compounds. The invention feeds Ar gas in a trichlorosilane line, which connects a trichlorosilane (TCS) tank and a series of distillation units. The distillation units have a pressure transducer and a pressure independent control valve (PIC-V) positioned on a vent gas line for discharging vent gas from the distillation units. Ar gas is fed to the TCS line with higher pressure than the pressure set for opening the PIC-V. The TCS is distilled by the distillation units with continuously discharging vent gas from the distillation units.Type: GrantFiled: June 25, 2012Date of Patent: August 27, 2013Assignees: Mitsubishi Polycrystalline Silicon America Corporation (MIPSA), Mitsubishi Materials CorporationInventors: Takeshi Kamei, Mamoru Nakano
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Patent number: 8444800Abstract: A manufacturing apparatus of silicon seed rod in which two silicon seed rods are joined into one long silicon seed rod by welding, having: an upper seed rod holding part holding an upper silicon seed rod vertically; an elevating device holding a lower silicon seed rod which faces a lower end of the upper silicon seed rod in a state in which the lower silicon seed rod is movable vertically; an induction-heating coil being arranged around the lower end of the upper silicon seed rod; a preheating ring being disposed below the induction-heating coil; and a moving device of the preheating ring that moves the preheating ring between a heat position in which the preheating ring is induction-heated around an upper end of the lower silicon seed rod by the induction-heating coil and a wait position which is distant from the heat position.Type: GrantFiled: October 27, 2010Date of Patent: May 21, 2013Assignee: Mitsubishi Materials CorporationInventors: Akimichi Nagaura, Mamoru Nakano
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Publication number: 20120275962Abstract: The invention concern an apparatus and a method for manufacturing polycrystalline silicon having a reduced amount of boron compounds. The invention feeds Ar gas in a trichlorosilane line, which connects a trichlorosilane (TCS) tank and a series of distillation units. The distillation units have a pressure transducer and a pressure independent control valve (PIC-V) positioned on a vent gas line for discharging vent gas from the distillation units. Ar gas is fed to the TCS line with higher pressure than the pressure set for opening the PIC-V. The TCS is distilled by the distillation units with continuously discharging vent gas from the distillation units.Type: ApplicationFiled: June 25, 2012Publication date: November 1, 2012Applicants: MITSUBISHI MATERIALS CORPORATION, Mitsubishi Polycrystalline Silicon America Corporation (MIPSA)Inventors: Takeshi Kamei, Mamoru Nakano
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Patent number: 8226920Abstract: The invention concern an apparatus and a method for manufacturing polycrystalline silicon having a reduced amount of boron compounds. The invention feeds Ar gas in a trichlorosilane line, which connects a trichlorosilane (TCS) tank and a series of distillation units. The distillation units have a pressure transducer and a pressure independent control valve (PIC-V) positioned on a vent gas line for discharging vent gas from the distillation units. Ar gas is fed to the TCS line with higher pressure than the pressure set for opening the PIC-V. The TCS is distilled by the distillation units with continuously discharging vent gas from the distillation units.Type: GrantFiled: January 7, 2011Date of Patent: July 24, 2012Assignees: Mitsubishi Polycrystalline Silicon America Corporation (MIPSA), Mitsubishi Materials CorporationInventors: Takeshi Kamei, Mamoru Nakano
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Publication number: 20120177558Abstract: The invention concern an apparatus and a method for manufacturing polycrystalline silicon having a reduced amount of boron compounds. The invention feeds Ar gas in a trichlorosilane line, which connects a trichlorosilane (TCS) tank and a series of distillation units. The distillation units have a pressure transducer and a pressure independent control valve (PIC-V) positioned on a vent gas line for discharging vent gas from the distillation units. Ar gas is fed to the TCS line with higher pressure than the pressure set for opening the PIC-V. The TCS is distilled by the distillation units with continuously discharging vent gas from the distillation units.Type: ApplicationFiled: January 7, 2011Publication date: July 12, 2012Applicants: MITSUBISHI MATERIALS CORPORATION, Mitsubishi Polycrystalline Silicon America Corporation (MIPSA)Inventors: Takeshi Kamei, Mamoru Nakano
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Publication number: 20110220283Abstract: A manufacturing apparatus of silicon seed rod in which two silicon seed rods are joined into one long silicon seed rod by welding, having: an upper seed rod holding part holding an upper silicon seed rod vertically; an elevating device holding a lower silicon seed rod which faces a lower end of the upper silicon seed rod in a state in which the lower silicon seed rod is movable vertically; an induction-heating coil being arranged around the lower end of the upper silicon seed rod; a preheating ring being disposed below the induction-heating coil; and a moving device of the preheating ring that moves the preheating ring between a heat position in which the preheating ring is induction-heated around an upper end of the lower silicon seed rod by the induction-heating coil and a wait position which is distant from the heat position.Type: ApplicationFiled: October 27, 2010Publication date: September 15, 2011Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Akimichi Nagaura, Mamoru Nakano
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Patent number: 7455731Abstract: A polycrystalline silicon rod according to present invention has a structure for hanging of polycrystalline silicon rods to each other end-to-end, so that the efficiency of melting polycrystalline silicon can be increased considerably. A polycrystalline silicon rod obtained by entirely or partially removing a peripheral portion from the rod to leave a central portion, and processing the central portion, preferably, the peripheral portion is removed by grinding in an amount corresponding to 10 to 60% of the diameter of the rod, and then subjected to groove-forming processing. This makes annealing unnecessary.Type: GrantFiled: May 1, 2006Date of Patent: November 25, 2008Assignee: Mitsubishi Materials CorporationInventors: Mamoru Nakano, Yukio Yamaguchi, Teruhisa Kitagawa, Rikito Sato, Naoki Hatakeyama
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Publication number: 20060228565Abstract: A polycrystalline silicon rod according to present invention has a structure for hanging of polycrystalline silicon rods to each other end-to-end, so that the efficiency of melting polycrystalline silicon can be increased considerably. A polycrystalline silicon rod obtained by entirely or partially removing a peripheral portion from the rod to leave a central portion, and processing the central portion, preferably, the peripheral portion is removed by grinding in an amount corresponding to 10 to 60% of the diameter of the rod, and then subjected to groove-forming processing. This makes annealing unnecessary.Type: ApplicationFiled: May 1, 2006Publication date: October 12, 2006Applicant: Mitsubishi Materials Polycrystalline Silicon Corp.Inventors: Mamoru Nakano, Yukio Yamaguchi, Teruhisa Kitagawa, Rikito Sato, Naoki Hatakeyama
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Patent number: 7060355Abstract: A polycrystalline silicon rod according to present invention has a structure for hanging of polycrystalline silicon rods to each other end-to-end, so that the efficiency of melting polycrystalline silicon can be increased considerably. A polycrystalline silicon rod obtained by entirely or partially removing a peripheral portion from the rod to leave a central portion, and processing the central portion, preferably, the peripheral portion is removed by grinding in an amount corresponding to 10 to 60% of the diameter of the rod, and then subjected to groove-forming processing. This makes annealing unnecessary.Type: GrantFiled: June 1, 2001Date of Patent: June 13, 2006Assignee: Mitsubishi Materials Polycrystalline Silicon CorporationInventors: Mamoru Nakano, Yukio Yamaguchi, Teruhisa Kitagawa, Rikito Sato, Naoki Hatakeyama
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Publication number: 20030183162Abstract: A polycrystalline silicon rod according to present invention has a structure for hanging of polycrystalline silicon rods to each other end-to-end, so that the efficiency of melting polycrystalline silicon can be increased considerably. A polycrystalline silicon rod obtained by entirely or partially removing a peripheral portion from the rod to leave a central portion, and processing the central portion, preferably, the peripheral portion is removed by grinding in an amount corresponding to 10 to 60% of the diameter of the rod, and then subjected to groove-forming processing. This makes annealing unnecessary.Type: ApplicationFiled: May 15, 2003Publication date: October 2, 2003Inventors: Mamoru Nakano, Yukio Yamaguchi, Teruhisa Kitagawa, Rikito Sato, Naoki Hatakeyama
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Patent number: 5192903Abstract: A load transport equipment having self-propelled trucks travelling on a predetermined route so as to transport a load by the truck, wherein an encoder is connected to a motor and the pulse number from the encoder is counted by a counter, the counted value being optically transmitted toward another self-propelled truck following the front self-propelled truck on the predetermined route, the following self-propelled truck receiving the counted value from the front self-propelled truck to obtain a difference between the received counted value and that of the following truck, so that the travel speed of the rear self-propelled truck is controlled on the basis of the difference so that the running speed is controlled in accordance with the distance between the trucks thereby preventing a rear-end collision.Type: GrantFiled: June 30, 1992Date of Patent: March 9, 1993Assignee: Daifuku Co., Ltd.Inventors: Hiroaki Kita, Koichi Murata, Mamoru Nakano
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Patent number: 5164648Abstract: A load transport equipment having self-propelled trucks travelling on a predetermined route so as to transport a load by the truck, wherein an encoder is connected to a motor and the pulse number from the encoder is counted by a counter, the counted value being optically transmitted toward another self-propelled truck following the front self-propelled truck on the predetermined route, the following self-propelled truck receiving the counted value from the front self-propelled truck to obtain a difference between the received counted value and that of the following truck, so that the travel speed of the rear self-propelled truck is controlled on the basis of the difference so that the running speed is controlled in accordance with the distance between the trucks thereby preventing a rear-end collision.Type: GrantFiled: October 15, 1991Date of Patent: November 17, 1992Assignee: Daifuku Co., Ltd.Inventors: Hiroaki Kita, Koichi Murata, Mamoru Nakano
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Patent number: 5134353Abstract: A load transport equipment having self-propelled trucks travelling on a predetermined route so as to transport a load by the truck, wherein an encoder is connected to a motor and the pulse number from the encoder is counted by a counter, the counted value being optically transmitted toward another self-propelled truck following the front self-propelled truck on the predetermined route, the following self-propelled truck receiving the counted value from the front self-propelled truck to obtain a difference between the received counted value and that of the following truck, so that the travel speed of the rear self-propelled truck is controlled on the basis of the difference so that the running speed is controlled in accordance with the distance between the trucks thereby preventing a rear-end collision.Type: GrantFiled: June 25, 1991Date of Patent: July 28, 1992Assignee: Daifuku Co., Ltd.Inventors: Hiroaki Kita, Koichi Murata, Mamoru Nakano
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Patent number: 5114083Abstract: The present invention relates to a method and apparatus for pulverizing a material to produce a fine powdery material such as silica powder as a material for a filler for sealing semiconductors. It has a shell and a screw shaft mounted in the shell. A disk having an inverted conical bottom surface is coaxially secured to the bottom of the screw shaft. The disk serves to protect the blade of the screw shaft from wear. Also owing to the inverted conical bottom surface, a centripetal force acts on the screw shaft while in rotation, thus preventing it from running out of true. By providing a plurality of screw shafts in the shell, the fluid in the shell flows in a complicated manner, thus increasing the pulverizing efficiency. A partitioning plate formed with a hole in the upper or lower part thereof may be provided between the adjacent screw shafts to minimize the possibility of shortcircuiting of the material from the inlet of the shell to its outlet.Type: GrantFiled: February 12, 1990Date of Patent: May 19, 1992Assignee: Kubota, Ltd.Inventors: Iwao Ikebuchi, Yoshitaka Ihara, Hisashi Takei, Syozo Yamada, Mamoru Nakano, Akira Ganse
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Patent number: 4955357Abstract: A method and apparatus for cutting polycrystalline silicon rods which comprise applying pressing forces at at least two positions on a plane perpendicular to the longitudinal axis of a polycrystalline silicon rod at a plurality of positions symmetrical to said axis.Type: GrantFiled: January 22, 1988Date of Patent: September 11, 1990Assignee: Hi-Silicon Co., Ltd.Inventors: Masakatsu Takeguchi, Takashi Yamamoto, Mamoru Nakano
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Patent number: 4872973Abstract: In a cyclone classifier wherein the material to be processed is swirled in a tubular casing having a conical lower portion and classified, a cylindrical body is provided in the casing, so as to surround the lower end of a fluid outlet pipe and extends downwardly below an inlet port for the material to be processed, so that the sectional area of passage for the material to be processed swirled in the casing will be made smaller, thus increasing the classifying point while keeping the pressure loss at a minimum. From another aspect, annular pipes formed with fluid inlet ports are provided around the outer periphery of a lower part of the casing so as to communicate with the casing so that gases or liquids will be blown into the lower part of the casing through these pipes to form a swirling current, thus allowing the material to be processed to be reclassified thereby increasing the classifying point.Type: GrantFiled: February 23, 1989Date of Patent: October 10, 1989Assignee: Kubota Ltd.Inventors: Iwao Ikebuchi, Mamoru Nakano, Kazuo Fuse, Akira Ganze
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Patent number: 4754934Abstract: An improved vertical grinding mill is proposed which comprises a shell, a vertical screw shaft rotatably mounted in the shell, a classifying means, a drive for the screw shaft, and means for forming a current of fluid for taking fine particles out of the shell. The inlet for the fluid is provided in the center of the bottom of the shell directly under the screw shaft. The fluid is uniformly distributed in all directions, carrying up the pulverized fine particles.Type: GrantFiled: February 24, 1987Date of Patent: July 5, 1988Assignee: Kubota, Ltd.Inventors: Iwao Ikebuchi, Mamoru Nakano