Patents by Inventor Taiji Hashimoto
Taiji Hashimoto 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: 11280223Abstract: A bolt fastening structure has an upper flange and a lower flange of a casing to which inner pressure is applied, the upper flange and the lower flange defining an abutting interface therebetween; a bolt hole formed through the abutting interface; and a counterbored portion formed asymmetric about a bolt hole center. The abutting interface includes a first region extending from a bolt hole inner side edge to an upper and lower flanges inner edge and being a region where the upper flange and the lower flange are in surface-to-surface contact with each other; and a partial contact region extending from a bolt hole outer side edge to an upper and lower flanges outer edge and being a region where the upper flange and the lower flange are partially in surface-to-surface contact with each other. In the partial contact region, the upper flange and the lower flange are in surface-to-surface contact with each other in a second region, and the first region is larger than the second region.Type: GrantFiled: March 23, 2017Date of Patent: March 22, 2022Assignee: Hitachi Industrial Products, Ltd.Inventors: Youhei Tanno, Takeshi Kazama, Ryuhei Tsukahara, Taiji Hashimoto, Tomohiro Naruse
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Publication number: 20190055855Abstract: A bolt fastening structure has an upper flange and a lower flange of a casing to which inner pressure is applied, the upper flange and the lower flange defining an abutting interface therebetween; a bolt hole formed through the abutting interface; and a counterbored portion formed asymmetric about a bolt hole center. The abutting interface includes a first region extending from a bolt hole inner side edge to an upper and lower flanges inner edge and being a region where the upper flange and the lower flange are in surface-to-surface contact with each other; and a partial contact region extending from a bolt hole outer side edge to an upper and lower flanges outer edge and being a region where the upper flange and the lower flange are partially in surface-to-surface contact with each other. In the partial contact region, the upper flange and the lower flange are in surface-to-surface contact with each other in a second region, and the first region is larger than the second region.Type: ApplicationFiled: March 23, 2017Publication date: February 21, 2019Inventors: Youhei TANNO, Takeshi KAZAMA, Ryuhei TSUKAHARA, Taiji HASHIMOTO, Tomohiro NARUSE
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Patent number: 9644636Abstract: In a centrifugal steam compressor having sealing water discharge at pressure higher than atmospheric pressure, a simple structure in which a high-pressure piping system is omitted as much as possible from a sealing water circulation system is realized. A shaft seal system 50 is capable of supplying high-pressure sealing water and low-pressure sealing water.Type: GrantFiled: March 1, 2013Date of Patent: May 9, 2017Assignee: Hitachi, Ltd.Inventors: Taiji Hashimoto, Tao Hu
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Publication number: 20150330401Abstract: In a centrifugal steam compressor having sealing water discharge at pressure higher than atmospheric pressure, a simple structure in which a high-pressure piping system is omitted as much as possible from a sealing water circulation system is realized. A shaft seal system 50 is capable of supplying high-pressure sealing water and low-pressure sealing water.Type: ApplicationFiled: March 1, 2013Publication date: November 19, 2015Inventors: Taiji HASHIMOTO, Tao HU
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Patent number: 8770589Abstract: A shaft-seal device for high-temperature fluid including a seal case (2) formed as a metallic cylindrical structure of a single unit and comprised of a main body portion (2a, 2b, 2c), first and second holding portions (2d, 2e), first and second partition portions (2f, 2h), a channel formation portion (2g) forming a minute annular channel (27) with the outer circumference surface of a rotary shaft (1), and an o-ring holding portion (2i). The seal case is installed in an apparatus housing (8) with first and second o-rings (2m, 2n) in between. The intra-seal case region (A1), in which sealing rings (31, 32, 41, 42, 51, 52) of mechanical seals (3, 4, 5) are provided, and the high-temperature fluid region, which is an intra-apparatus housing region (A), are partitioned by a cooling chamber (28) into and from which coolant (82) is supplied and discharged via feed/discharge coolant paths (80, 81).Type: GrantFiled: June 25, 2012Date of Patent: July 8, 2014Assignees: Nippon Pillar Packaging Co., Ltd., Hitachi, Ltd.Inventors: Taiji Hashimoto, Tao Hu, Eiji Okumachi, Masanobu Ninomiya
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Patent number: 8631961Abstract: Size reduction of a barrel-type casing using a shear key is aimed for while ensuring a necessary area of a head cover end surface. A shoulder is formed on the axially outer side of the outer circumferential surface of a head cover. The inner surface of a casing is provided with a circumferentially extending groove. Shear key structure includes a first shear key member disposed in the shoulder and the groove, such that at least a portion of its outer circumferential surface is in contact with the inner circumferential surface of the groove, and a second shear key member disposed adjacent to the first shear key member in the groove, the second shear key member having an axially projecting shoulder, its outer circumferential surface being in contact with an inner circumferential surface of the casing.Type: GrantFiled: April 22, 2010Date of Patent: January 21, 2014Assignee: Hitachi, Ltd.Inventors: Tomohiro Naruse, Tetsuya Kuwano, Taiji Hashimoto, Haruo Miura, Mitsuhiro Narita
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Patent number: 8481885Abstract: A welding apparatus and a welding method are employed for laser narrow groove welding which performs welding scanning a laser beam in the welding direction while feeding a solid filler metal into a narrow groove. The welding apparatus includes a laser beam irradiation head having a mechanism periodically oscillating an irradiation point of the laser beam with a predetermined amplitude in the bottom of the groove, and a filler metal control device having a solid filler metal feeder feeding the solid filler metal to the molten pool formed in the bottom of the groove by the laser beam and adjusting the feeding position independent of a motion of the laser beam irradiation head so that the tip position of the solid filler metal detected is constantly positioned in the center of the groove.Type: GrantFiled: June 29, 2010Date of Patent: July 9, 2013Assignee: Hitachi Plant Technologies, Ltd.Inventors: Takeshi Tsukamoto, Hirotsugu Kawanaka, Yoshihisa Maeda, Shinji Imaoka, Tetsuya Kuwano, Taiji Hashimoto
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Publication number: 20120326394Abstract: A shaft-seal device for high-temperature fluid including a seal case (2) formed as a metallic cylindrical structure of a single unit and comprised of a main body portion (2a, 2b, 2c), first and second holding portions (2d, 2e), first and second partition portions (2f, 2h), a channel formation portion (2g) forming a minute annular channel (27) with the outer circumference surface of a rotary shaft (1), and an o-ring holding portion (2i). The seal case is installed in an apparatus housing (8) with first and second o-rings (2m, 2n) in between. The intra-seal case region (A1), in which sealing rings (31, 32, 41, 42, 51, 52) of mechanical seals (3, 4, 5) are provided, and the high-temperature fluid region, which is an intra-apparatus housing region (A), are partitioned by a cooling chamber (28) into and from which coolant (82) is supplied and discharged via feed/discharge coolant paths (80, 81).Type: ApplicationFiled: June 25, 2012Publication date: December 27, 2012Applicants: Nippon Pillar Packing Co., Ltd., Hitachi Plant Technologies, Ltd.Inventors: Taiji Hashimoto, Tao Hu, Eiji Okumachi, Masanobu Ninomiya
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Patent number: 8153091Abstract: To provide a simple highly-pure Xe retrieval method and device with high retrieval efficiency by functionally removing such elements as water, CO2 and FCs from waste gases from semiconductor production processes, such as the plasma etching, that contain low-concentration Xe. For samples containing xenon and fluorocarbon, this invention is characterized by having at least first adsorption means (A1) filled with synthetic zeolite with pore size of 4A or smaller and aluminum oxide, arranged serially, gas separation means (A2) composed of silicone or polyethylene hollow fiber gas separation membrane modules 4, second adsorption means (A3) filled with either activated carbon, synthetic zeolite with pore size of 5A or larger, molecular sieving carbon with pore size of 5A or larger, or a combination of these, and reaction means (A4) filled with calcium compounds as reactant.Type: GrantFiled: November 30, 2007Date of Patent: April 10, 2012Assignee: L'Air Liquide Societe Anonyme Pour l'Etude Et l'Exploitation des Procedes Georges ClaudeInventors: Masahiro Kimoto, Terumasa Koura, Yukio Fukuda, Masaki Narazaki, Taiji Hashimoto, Toru Sakai, Kazuo Yokogi
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Publication number: 20100326969Abstract: A welding apparatus and a welding method are employed for laser narrow groove welding which performs welding scanning a laser beam in the welding direction while feeding a solid filler metal into a narrow groove. The welding apparatus includes a laser beam irradiation head having a mechanism periodically oscillating an irradiation point of the laser beam with a predetermined amplitude in the bottom of the groove, and a filler metal control device having a solid filler metal feeder feeding the solid filler metal to the molten pool formed in the bottom of the groove by the laser beam and adjusting the feeding position independent of a motion of the laser beam irradiation head so that the tip position of the solid filler metal detected is constantly positioned in the center of the groove.Type: ApplicationFiled: June 29, 2010Publication date: December 30, 2010Inventors: Takeshi TSUKAMOTO, Hirotsugu Kawanaka, Yoshihisa Maeda, Shinji Imaoka, Tetsuya Kuwano, Taiji Hashimoto
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Publication number: 20100270308Abstract: Size reduction of a barrel-type casing using a shear key is aimed for while ensuring a necessary area of a head cover end surface. A shoulder is formed on the axially outer side of the outer circumferential surface of a head cover. The inner surface of a casing is provided with a circumferentially extending groove. Shear key structure includes a first shear key member disposed in the shoulder and the groove, such that at least a portion of its outer circumferential surface is in contact with the inner circumferential surface of the groove, and a second shear key member disposed adjacent to the first shear key member in the groove, the second shear key member having an axially projecting shoulder, its outer circumferential surface being in contact with an inner circumferential surface of the casing.Type: ApplicationFiled: April 22, 2010Publication date: October 28, 2010Inventors: Tomohiro NARUSE, Tetsuya KUWANO, Taiji HASHIMOTO, Haruo MIURA, Mitsuhiro NARITA
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Publication number: 20100074820Abstract: To provide a simple highly-pure Xe retrieval method and device with high retrieval efficiency by functionally removing such elements as water, CO2 and FCs from waste gases from semiconductor production processes, such as the plasma etching, that contain low-concentration Xe. For samples containing xenon and fluorocarbon, this invention is characterized by having at least first adsorption means (A1) filled with synthetic zeolite with pore size of 4A or smaller and aluminum oxide, arranged serially, gas separation means (A2) composed of silicone or polyethylene hollow fiber gas separation membrane modules 4, second adsorption means (A3) filled with either activated carbon, synthetic zeolite with pore size of 5A or larger, molecular sieving carbon with pore size of 5A or larger, or a combination of these, and reaction means (A4) filled with calcium compounds as reactant.Type: ApplicationFiled: November 30, 2007Publication date: March 25, 2010Inventors: Masahiro Kimoto, Terumasa Koura, Yukio Fukuda, Masaki Narazaki, Taiji Hashimoto, Toru Sakai, Kazuo Yokogi
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Patent number: 7530781Abstract: A pump device for pressurizing a fluid to be fed, comprises: a rotary shaft, a bearing including a bearing surface adapted to face to the rotary shaft so that the rotary shaft is supported on the bearing surface in a rotatable manner, and an impeller fixed to the rotary shaft to be rotatable with the rotary shaft so that the fluid is pressurized by a rotation of the impeller.Type: GrantFiled: May 9, 2005Date of Patent: May 12, 2009Assignee: Hitchi Industries Co., Ltd.Inventors: Takaki Fukuchi, Taiji Hashimoto, Kazuo Amano
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Publication number: 20050254943Abstract: A pump device for pressurizing a fluid to be fed, comprises: a rotary shaft, a bearing including a bearing surface adapted to face to the rotary shaft so that the rotary shaft is supported on the bearing surface in a rotatable manner, and an impeller fixed to the rotary shaft to be rotatable with the rotary shaft so that the fluid is pressurized by a rotation of the impeller.Type: ApplicationFiled: May 9, 2005Publication date: November 17, 2005Applicant: HITACHI INDUSTRIES CO., LTD.Inventors: Takaki Fukuchi, Taiji Hashimoto, Kazuo Amano
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Publication number: 20030152495Abstract: The present invention has an object thereof to make possible the recycling of exhaust gas components in a manufacturing process by cooling, liquefaction, and recovery, and to use toxic or useful gases without disposal, and to dramatically reduce the frequency of exhaust system maintenance by combining such a recovery method with a vacuum exhaust system.Type: ApplicationFiled: August 20, 2002Publication date: August 14, 2003Inventors: Tadahiro Ohmi, Takahisa Nitta, Yasuyuki Shirai, Taiji Hashimoto, Kazuhide Ino
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Patent number: 6514034Abstract: A pump, comprising: an impeller 1 having blades; and a casing 121 for storing the impeller therein, on an inner surface of which, confronting to the impeller, are formed plural numbers of shallow grooves 124 in a direction of pressure gradient of fluid, around a periphery thereof, wherein the fluid being increased up in pressure by the blades 122 flows within the grooves in a reverse direction, directing to an upstream side, so as to spout out at a place where re-circulations occur when the flow rate is low in amount. Also, an outlet angle of the blade 122 is set to be within a region from 30 degree to 90 degree. Further, preferably, front guide vanes 11 are provided, so that a direction of absolute flow at an outlet of the impeller is directed into an axial direction of the pump at an amount of designed flow rate.Type: GrantFiled: April 6, 2001Date of Patent: February 4, 2003Assignee: Hitachi, Ltd.Inventors: Tomoyoshi Okamura, Kouichi Irie, Taiji Hashimoto, Hitoharu Kimura
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Publication number: 20020164245Abstract: A pump, comprising: an impeller 1 having blades; and a casing 121 for storing the impeller therein, on an inner surface of which, confronting to the impeller, are formed plural numbers of shallow grooves 124 in a direction of pressure gradient of fluid, around a periphery thereof, wherein the fluid being increased up in pressure by the blades 122 flows within the grooves in a reverse direction, directing to an upstream side, so as to spout out at a place where re-circulations occur when the flow rate is low in amount.Type: ApplicationFiled: April 6, 2001Publication date: November 7, 2002Inventors: Tomoyoshi Okamura, Kouichi Irie, Taiji Hashimoto, Hitoharu Kimura
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Patent number: 6436353Abstract: The present invention makes possible the recycling of exhaust has components in a manufacturing process by cooling, liquefaction, and recovery, and to use toxic or useful gases without disposal, and to dramatically reduce the frequency of exhaust system maintenance by combining such a recovery method with a vacuum exhaust system.Type: GrantFiled: June 12, 1998Date of Patent: August 20, 2002Assignees: Kabushiki Kaisha Ultraclean Technology Research InstituteInventors: Tadahiro Ohmi, Takahisa Nitta, Yasuyuki Shirai, Taiji Hashimoto, Kazuhide Ino
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Patent number: 4770615Abstract: A screw compressor including a scavenging port, which is separate from a discharge port, located on or in a vicinity of a discharge-side end face of the working space of the casing, for scavenging gas therethrough from a compression chamber near to a completion of a suction stroke. Gas of high temperature leaking from a compression chamber on high-pressure side into a compression chamber on a low-pressure side (in the suction stroke) can be scavenged from the compressor to outside, thereby avoiding a reduction in suction volume efficiency, an increase in consumption of power, and a rise in temperature of gas to be compressed which might otherwise be caused by the gas of high temperature leaking into the compression chambers during a suction stroke.Type: GrantFiled: September 11, 1986Date of Patent: September 13, 1988Assignee: Hitachi, Ltd.Inventors: Mitsuru Fujiwara, Taiji Hashimoto, Akira Suzuki