Patents by Inventor Kenkichi Izumi
Kenkichi Izumi 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: 7375945Abstract: In an ion generator comprising a discharge needle 2, an opposed electrode 3 opposite the discharge needle 2 and an AC high voltage power source 4, for generating positive and negative air ions by giving rise to a corona discharge when a high voltage is applied by the AC high voltage power source 4 between the discharge needle 2 and the opposed electrode 3, the AC high voltage power source 4 comprises a high frequency oscillator 7 and a piezoelectric transformer 9, and outputs a high frequency voltage. An insulator 5 is placed intervening between the high voltage output line 4a of the AC high voltage power source 4 and the discharge needle 2 to capacitance-couple them, and the discharge needle 2 is enabled to discharge electricity. Preferably, the surface of the opposed electrode 3 should be covered with an insulator. This enables the balance between positive and negative air ions and its stability to be improved while reducing the hardware configuration in size and weight.Type: GrantFiled: June 2, 2004Date of Patent: May 20, 2008Assignee: Shishido Electrostatic, Ltd.Inventors: Kenkichi Izumi, Jianmin Si
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Publication number: 20060232908Abstract: In an ion generator comprising a discharge needle 2, an opposed electrode 3 opposite the discharge needle 2 and an AC high voltage power source 4, for generating positive and negative air ions by giving rise to a corona discharge when a high voltage is applied by the AC high voltage power source 4 between the discharge needle 2 and the opposed electrode 3, the AC high voltage power source 4 comprises a high frequency oscillator 7 and a piezoelectric transformer 9, and outputs a high frequency voltage. An insulator 5 is placed intervening between the high voltage output line 4a of the AC high voltage power source 4 and the discharge needle 2 to capacitance-couple them, and the discharge needle 2 is enabled to discharge electricity. Preferably, the surface of the opposed electrode 3 should be covered with an insulator. This enables the balance between positive and negative air ions and its stability to be improved while reducing the hardware configuration in size and weight.Type: ApplicationFiled: June 2, 2004Publication date: October 19, 2006Applicant: Shishido ElectrostaticInventors: Kenkichi Izumi, Jianmin Si
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Patent number: 4597871Abstract: Apparatus for removing foreign matter in liquid which includes a cylindrical housing, a radial inlet pipe provided on an upper portion of the housing, an outlet pipe axially mounted on the housing at the upper portion, a conical cylindrical filter disposed in the housing and connected to the end of the outlet pipe so as to discharge the liquid from the inlet pipe through said filter and the outlet pipe, a deflector for deflecting the liquid from the inlet pipe so as to swirl it round the filter, and an extracting pipe provided on the housing at the bottom portion. The filter extends conically from the inlet pipe or outlet pipe toward the bottom of the casing. The liquid from the inlet pipe is swirled by the operation of the deflector and directed downward by the position of the filter while swirling. The foreign matter in the liquid and deposited on the filter are swirled by the swirling liquid, condensed by centrifugal force and downward movement.Type: GrantFiled: May 29, 1984Date of Patent: July 1, 1986Assignee: Hitachi, Ltd.Inventors: Isao Okouchi, Kenkichi Izumi, Sankichi Takahashi, Yasuteru Mukai, Akira Tomida
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Patent number: 4592419Abstract: A condenser for a steam turbine expels the oxygen-containing gas residing in the condensate passage in the hot well thereof by a scavenging steam. The oxygen-containing gas is expelled by the scavenging gas, which is introduced into the atmosphere in the condensate passage and arranged to flow counter to the condensate flow. The scavenging means includes a steam pipe attached in a vicinity of an outlet of the condensate passage in the hot well, and a valve device provided in the intermediate portion of the steam pipe.Type: GrantFiled: February 6, 1984Date of Patent: June 3, 1986Assignee: Hitachi, Ltd.Inventors: Keizo Ishida, Yoshikuni Ohshima, Toyoyuki Mukaidani, Isao Okouchi, Kenkichi Izumi
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Patent number: 4543188Abstract: A foreign matter removing apparatus for removing foreign matters from cooling water such as sea water taken as the cooling water for the condenser of, for example, a power generating plant. The apparatus has an inversed frusto-conical barrel, a filter of a substantially same form as the barrel and disposed in the latter, a cooling water inlet pipe connected to a side portion of the barrel, a cooling water outlet pipe connected to an upper portion of the barrel, a foreign matter discharge pipe connected to a lower side portion of the barrel, and a butterfly valve disposed in the cooling water inlet at which the cooling water inlet pipe is connected to the barrel. The foreign matter discharge pipe is periodically opened while varying the opening degree or angular position of the butterfly valve thereby to remove and discharge foreign matters from the filter surface.Type: GrantFiled: November 3, 1983Date of Patent: September 24, 1985Assignee: Hitachi, Ltd.Inventors: Isao Okouchi, Sankichi Takahashi, Kenkichi Izumi, Masahiko Miyai, Katsumoto Otake
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Patent number: 4351715Abstract: In electrodialysis of desalting or concentrating an electrolyte solution in desalting chambers and concentrating chambers constituted by alternately juxtaposing a plurality of anion and cation exchange membranes between at least a pair of electrodes by supplying the electrolyte solution into the desalting and concentrating chambers while introducing a gas in a bubble state into the electrolyte solution between the ion exchange membranes, the electrolyte solution is made to contact the gas in the bubble state while providing a temperature difference between the gas and the electrolyte solution. The scale deposition onto the ion exchange membranes is prevented with an increase in electrodialysis efficiency.Type: GrantFiled: March 2, 1981Date of Patent: September 28, 1982Assignees: Hitachi, Ltd., Babcock-Hitachi Kabushiki KaishaInventors: Harumi Matsuzaki, Osamu Kuroda, Isao Okouchi, Kenkichi Izumi, Sankichi Takahashi
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Patent number: 4311575Abstract: In electrodialysis for desalting or concentrating an electrolyte solution in desalting chambers and concentrating chambers constituted by alternately juxtaposing a plurality of anion and cation exchange membranes between at least a pair of electrodes by supplying the electrolyte solution into the desalting and concentrating chambers while introducing a gas in a bubble state into the electrolyte solution between the ion exchange membranes, the electrolyte solution is made to contact the gas in the bubble state while providing a temperature difference between the gas and the electrolyte solution. The scale deposition onto the ion exchange membranes is prevented with an increase in electrodialysis efficiency.Type: GrantFiled: April 10, 1980Date of Patent: January 19, 1982Assignees: Hitachi, Ltd., Babcock-Hitachi Kabushiki KaishaInventors: Harumi Matsuzaki, Osamu Kuroda, Isao Okouchi, Kenkichi Izumi, Sankichi Takahashi
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Patent number: 4245998Abstract: To remove salts from a solution containing the salts, hot air is injected downwards into the solution in a concentrator, and the solution is concentrated by direct contact with the hot air, thereby enhancing an evaporation efficiency in the concentrator and preventing scale deposition in the concentrator and piping system. The solution is forcedly cooled in a crystallizer by direct contact with cool air, thereby making crystals grow in the solution within a short time. The solution and air are circulated in a closed cycle, thereby preventing a secondary environmental pollution.Type: GrantFiled: March 29, 1978Date of Patent: January 20, 1981Assignees: Hitachi, Ltd., Hitachi Plant Engineering and Construction Co., Ltd.Inventors: Isao Okouchi, Kenkichi Izumi, Haruyuki Yamazaki, Sankichi Takahashi
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Patent number: 3966562Abstract: A multi-stage distillation plant consisting essentially of a multi-flash evaporator provided with a multi-flash chamber which is divided into a heat recovery section and a heat rejection section. In this multi-stage flash distillation plant, the aforesaid flash evaporator is provided with a deaerator for deaerating cold sea water, a thickener for separating brine containing a relatively great amount of seeds, from concentrated brine which has been extracted from a front chamber of the final stage flash chamber, and a seed mixing tank for obtaining a seed-mixed brine, whereby part of the sea water which has passed through the deaerator is supplied as a feed sea water to the rear chamber of the final stage flash chamber, while the brine containing a relatively great amount of seed and extracted from the thickener is joined to the seed-mixed brine fed from the seed mixing tank.Type: GrantFiled: July 31, 1974Date of Patent: June 29, 1976Assignee: Agency of Industrial Science & TechnologyInventors: Toshimi Mukushi, Kenkichi Izumi, Sankichi Takahashi, Yoshiaki Okazima, Toshio Sawa, Mithumasa Komai
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Patent number: 3932150Abstract: A vacuum deaerator is provided with a plurality of low pressure chambers disposed in a multi-stage fashion. The pressures in the aforesaid low pressure chambers are so adjusted that the difference between the temperature at treated water which flows into respective low pressure chambers and the temperature in the low pressure chambers may be maintained constant.Type: GrantFiled: October 29, 1974Date of Patent: January 13, 1976Assignee: Agency of Industrial Science and TechnologyInventors: Mitsumasa Komai, Toshio Sawa, Kenkichi Izumi