Patents by Inventor Yukio Doi
Yukio Doi 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: 7879246Abstract: It is an object of the present invention to provide an effective technique for achieving a higher level of water quality control in a water treatment apparatus. Representative water treatment apparatus according to the present invention may include a purifying section, a sterilizing section, a water storing section and a water quality detection sensor. The water quality detection sensor is immersed in the water storing section. The water quality detection sensor not only serves as a means for detecting the quality of water in the water storing section, but also as a means for detecting deposition of biomembrane on the detecting section of the water quality detection sensor due to deterioration of the sterilizing performance of the water storing section. As a result, an efficient water quality control system can be realized.Type: GrantFiled: February 7, 2006Date of Patent: February 1, 2011Assignee: Fuji Clean Co., LtdInventors: Yukio Doi, Koichi Matsuo, Yosuke Tabata, Toshiyuki Iwama, Yoichiro Shimizu
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Publication number: 20100163468Abstract: It is an object of the invention to provide a optimized rational water treatment technique for chemically treating water to be treated. A representative water treatment apparatus is adapted for chemically treating water by using chemicals. In a water treatment apparatus, a disinfectant within a chemical cartridge dissolves out in water to be treated in a disinfecting chamber so that the water is disinfected. Further, a magnet is disposed within the chemical cartridge. The accommodated position of the magnet within the chemical cartridge is changed according to the remaining amount of the disinfectants. The magnetism of such magnet is detected by a magnetic sensor disposed on the outside of the chemical cartridge, so that information on consumption of the disinfectant can be detected.Type: ApplicationFiled: June 27, 2008Publication date: July 1, 2010Applicant: Fuji Clean Co., Ltd.Inventors: Eiichi Suzuki, Yukio Doi, Jun Hibino, Hiroshi Yamashita
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Patent number: 7622042Abstract: It is an object of the invention to provide an effective technique for detecting the quality of water with high accuracy. A representative water treatment apparatus includes an aerobic treatment region that treats water aerobically, a downstream region in which the water aerobically treated in the aerobic treatment region flows, a water quality sensor that is submerged in the downstream region and detects the water quality and a sensor washing arrangement that washes the water quality sensor by supplying the water of the downstream region to the water quality sensor at a flow rate higher than water flowing around the water quality sensor. As a result, sludge generated due to aerobic treatment can be prevented from being deposited on the water quality sensor and/or deposited sludge can be removed, so that the accuracy of water quality detection of the water quality sensor can be enhanced.Type: GrantFiled: October 22, 2008Date of Patent: November 24, 2009Assignee: Fuji Clean Co., Ltd.Inventors: Eiichi Suzuki, Yukio Doi, Hayato Kurokawa, Yosuke Tabata, Toshiyuki Iwama
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Publication number: 20090057211Abstract: It is an object of the invention to provide an effective technique for detecting the quality of water with high accuracy. A representative water treatment apparatus includes an aerobic treatment region that treats water aerobically, a downstream region in which the water aerobically treated in the aerobic treatment region flows, a water quality sensor that is submerged in the downstream region and detects the water quality and a sensor washing arrangement that washes the water quality sensor by supplying the water of the downstream region to the water quality sensor at a flow rate higher than water flowing around the water quality sensor. As a result, sludge generated due to aerobic treatment can be prevented from being deposited on the water quality sensor and/or deposited sludge can be removed, so that the accuracy of water quality detection of the water quality sensor can be enhanced.Type: ApplicationFiled: October 22, 2008Publication date: March 5, 2009Inventors: Eiichi Suzuki, Yukio Doi, Hayato Kurokawa, Yosuke Tabata, Toshiyuki Iwama
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Patent number: 7455775Abstract: It is an object of the invention to provide an effective technique for detecting the quality of water with high accuracy. A representative water treatment apparatus includes an aerobic treatment region that treats water aerobically, a downstream region in which the water aerobically treated in the aerobic treatment region flows, a water quality sensor that is submerged in the downstream region and detects the water quality and a sensor washing arrangement that washes the water quality sensor by supplying the water of the downstream region to the water quality sensor at a flow rate higher than water flowing around the water quality sensor. As a result, sludge generated due to aerobic treatment can be prevented from being deposited on the water quality sensor and/or deposited sludge can be removed, so that the accuracy of water quality detection of the water quality sensor can be enhanced.Type: GrantFiled: November 9, 2006Date of Patent: November 25, 2008Assignee: Fuji Clean Co., Ltd.Inventors: Eiichi Suzuki, Yukio Doi, Hayato Kurokawa, Yosuke Tabata, Toshiyuki Iwama
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Publication number: 20070114175Abstract: It is an object of the invention to provide an effective technique for detecting the quality of water with high accuracy. A representative water treatment apparatus includes an aerobic treatment region that treats water aerobically, a downstream region in which the water aerobically treated in the aerobic treatment region flows, a water quality sensor that is submerged in the downstream region and detects the water quality and a sensor washing arrangement that washes the water quality sensor by supplying the water of the downstream region to the water quality sensor at a flow rate higher than water flowing around the water quality sensor. As a result, sludge generated due to aerobic treatment can be prevented from being deposited on the water quality sensor and/or deposited sludge can be removed, so that the accuracy of water quality detection of the water quality sensor can be enhanced.Type: ApplicationFiled: November 9, 2006Publication date: May 24, 2007Inventors: Eiichi Suzuki, Yukio Doi, Hayato Kurokawa, Yosuke Tabata, Toshiyuki Iwama
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Publication number: 20060177555Abstract: It is an object of the present invention to provide an effective technique for achieving a higher level of water quality control in a water treatment apparatus. Representative water treatment apparatus according to the present invention may include a purifying section, a sterilizing section, a water storing section and a water quality detection sensor. The water quality detection sensor is immersed in the water storing section. The water quality detection sensor not only serves as a means for detecting the quality of water in the water storing section, but also as a means for detecting deposition of biomembrane on the detecting section of the water quality detection sensor due to deterioration of the sterilizing performance of the water storing section. As a result, an efficient water quality control system can be realized.Type: ApplicationFiled: February 7, 2006Publication date: August 10, 2006Inventors: Yukio Doi, Koichi Matsuo, Yosuke Tabata, Toshiyuki Iwama, Yoichiro Shimizu
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Patent number: 6716911Abstract: The invention provides a method for producing an aqueous biodegradable polyester dispersion and includes the step of mixing and kneading a molten biodegradable polyester, an aqueous emulsifier solution having a surface tension in terms of 1.0% by weight aqueous solution at 20° C. of 63 mN/m or less, and other additives according to necessity to yield an aqueous dispersion having a solid concentration of 40% by weight or more and a viscosity at 20° C. of 1000 mPa·s or more. The invention can provide a method for producing an aqueous biodegradable polyester dispersion that has a high solid concentration and a high viscosity and is very advantageous in practical use.Type: GrantFiled: December 13, 2002Date of Patent: April 6, 2004Assignee: Showa Highpolymer Co., Ltd.Inventors: Yukio Doi, Ryoji Ishioka, Yoshiro Okino, Mitsuhiro Imaizumi
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Publication number: 20030181630Abstract: The invention provides a method for producing an aqueous biodegradable polyester dispersion and includes the step of mixing and kneading a molten biodegradable polyester, an aqueous emulsifier solution having a surface tension in terms of 1.0% by weight aqueous solution at 20° C. of 63 mN/m or less, and other additives according to necessity to yield an aqueous dispersion having a solid concentration of 40% by weight or more and a viscosity at 20° C. of 1000 mPa·s or more. The invention can provide a method for producing an aqueous biodegradable polyester dispersion that has a high solid concentration and a high viscosity and is very advantageous in practical use.Type: ApplicationFiled: December 13, 2002Publication date: September 25, 2003Inventors: Yukio Doi, Ryoji Ishioka, Yoshiro Okino, Mitsuhiro Imaizumi
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Patent number: 5594067Abstract: A method of manufacturing a water-based silicone type graft copolymer emulsion in which silicone (a macromonomer) having a radical polymerizable functional group and another vinyl monomer are, under presence of a surface active agent having a radical polymerizable functional group, emulsified and dispersed to a particle size of 0.5 .mu.m or less, and the temperature is raised to copolymerize the emulsified and dispersed material. In the macromonomer, a macromonomer with a silicone structural unit repetition number n of less than 20 is contained in a quantity of 5 to 80 wt %.Type: GrantFiled: May 23, 1994Date of Patent: January 14, 1997Assignee: Showa Highpolymer Co., Ltd.Inventors: Yukio Doi, Wei-Zhong Zhang, Masayoshi Kinugasa
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Patent number: 5462988Abstract: A silicone copolymer emulsion comprising:(A) 10 to 90 wt % of a silicone component containing(i) 5 to 60 wt % of compound (a) and(ii) 95 to 40 wt % of a crosslinkable silicone;(B) 90 to 10 wt % of a copolymerizable monomer; and(C) a curing catalyst,said compound (a) being expressed by the following formula (1): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 denote alkyl, phenyl, (meth)acryloxyalkyl and the like.Type: GrantFiled: April 14, 1994Date of Patent: October 31, 1995Assignee: Showa Highpolymer Co., Ltd.Inventors: Yukio Doi, Wei-Zhong Zhang, Koichi Ishitani, Masayoshi Kinugasa
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Patent number: 4957666Abstract: An improved in-situ polymerization method is provided for easily producing a good slurry of strong, dense, water-resistant and anti-hygroscopic microcapsules made of an amino resin of either of melamine-formaldehyde series or the ureaformaldehyde series, in a high concentration of microcapsules, and a low viscosity.Type: GrantFiled: September 13, 1988Date of Patent: September 18, 1990Assignees: Taio Paper Manufacturing Co., Ltd., Showa High Polymer Co., Ltd.Inventors: Michio Kawamura, Yasunori Shimada, Koichi Inoshita, Shozo Yoshida, Toshiaki Kawanabe, Haruo Hattori, Yukio Doi, Mamoru Awano