Patents by Inventor Norihisa Saito
Norihisa Saito 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).
-
Patent number: 9850581Abstract: A coating of niobium oxide, zirconium titanate, or nickel titanate is formed on at least a part of a surface of a jet pump member constituting a jet pump serving as a reactor internal structure of a boiling water reactor. Further, a solution containing, e.g., a niobium compound is applied to at least a part of the surface of the jet pump member constituting the jet pump, and the jet pump member coated with the solution is heat-treated to form a coating of, e.g., niobium oxide. With this configuration, the jet pump member constituting the jet pump of the boiling water reactor is provided such that deposition of crud can be sufficiently suppressed on the jet pump member.Type: GrantFiled: February 19, 2016Date of Patent: December 26, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Akio Sayano, Norihisa Saito, Tetsuji Kaneko, Yasuo Morishima, Masato Okamura, Kenji Yamazaki, Kunihiko Kinugasa
-
Publication number: 20160194763Abstract: A coating of niobium oxide, zirconium titanate, or nickel titanate is formed on at least a part of a surface of a jet pump member constituting a jet pump serving as a reactor internal structure of a boiling water reactor. Further, a solution containing, e.g., a niobium compound is applied to at least a part of the surface of the jet pump member constituting the jet pump, and the jet pump member coated with the solution is heat-treated to form a coating of, e.g., niobium oxide. With this configuration, the jet pump member constituting the jet pump of the boiling water reactor is provided such that deposition of crud can be sufficiently suppressed on the jet pump member.Type: ApplicationFiled: February 19, 2016Publication date: July 7, 2016Applicant: Kabushiki Kaisha ToshibaInventors: Akio SAYANO, Norihisa SAITO, Tetsuji KANEKO, Yasuo MORISHIMA, Masato OKAMURA, Kenji YAMAZAKI, Kunihiko KINUGASA
-
Patent number: 8132414Abstract: A steam turbine includes a bucket implanted in a turbine rotor and a nozzle disposed on an upstream side of the bucket and supported by a turbine casing, in which a plurality of stages, each including the bucket and the nozzle, are arranged axially in the turbine so as to define a steam path. A hydrophilic coating portion is disposed in the entire area or an area of at least one portion of a circumferential surface of the turbine rotor, surfaces of the nozzles, surfaces of the buckets, and an inner circumferential surface of the turbine casing.Type: GrantFiled: October 27, 2006Date of Patent: March 13, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Yoshiki Niizeki, Akio Sayano, Naoki Shibukawa, Norihisa Saito, Masashi Takahashi
-
Publication number: 20110256036Abstract: A coating of niobium oxide, zirconium titanate, or nickel titanate is formed on at least a part of a surface of a jet pump member constituting a jet pump serving as a reactor internal structure of a boiling water reactor. Further, a solution containing, e.g., a niobium compound is applied to at least a part of the surface of the jet pump member constituting the jet pump, and the jet pump member coated with the solution is heat-treated to form a coating of, e.g., niobium oxide. With this configuration, the jet pump member constituting the jet pump of the boiling water reactor is provided such that deposition of crud can be sufficiently suppressed on the jet pump member.Type: ApplicationFiled: December 10, 2009Publication date: October 20, 2011Applicant: Kabushiki Kaisha ToshibaInventors: Akio Sayano, Norihisa Saito, Tetsuji Kaneko, Yasuo Morishima, Masato Okamura, Kenji Yamazaki, Kunihiko Kinugasa
-
Patent number: 7815891Abstract: A hydrogen manufacturing apparatus for manufacturing hydrogen by utilizing heat generated in a nuclear plant. The apparatus has a heat exchanger or steam reformer to be brought into contact with cooling water containing tritium produced from the nuclear plant and a tritium permeation suppressing ceramic coating at least either the outer surface or the inner surface of the heat exchanger or steam reformer for suppressing permeation of tritium. Instead of coating with a tritium permeation suppressing ceramic, a structure prepared by combining at least two types of materials having different crystal structures may be used.Type: GrantFiled: January 11, 2007Date of Patent: October 19, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Yumiko Tsuchiya, Fumihisa Kano, Norihisa Saito, Seiji Fujiwara
-
Patent number: 7713402Abstract: Chemical decontamination method of dissolving oxide film adhered to contaminated component including, preparing decontamination solution in which ozone is dissolved and oxidation additive agent, which suppresses corrosion of metal base of the contaminated component, is added, and applying the decontamination solution to the contaminated component, thereby to remove the oxide film by oxidation.Type: GrantFiled: June 8, 2005Date of Patent: May 11, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Masami Enda, Yumi Yaita, Norihisa Saito, Hiromi Aoi, Ichiro Inami, Hitoshi Sakai, Satoshi Hiraragi, Yoshinari Takamatsu
-
Patent number: 7641848Abstract: A process for production of a magnet which comprises step of supplying a slurry S containing magnetic powder and a dispersing medium into the cavity C of a molding apparatus 12, a step of compression molding the slurry S while applying a magnetic field to the slurry S to obtain a molded article and a step of sintering the molded article to obtain a magnet, wherein the molding apparatus 12 comprises a die 121 having a through-hole 121a into which the slurry S is supplied, a slurry supply gate 121d being formed in the inner wall surface 121b, a die 122 inserted in the through-hole 121a and a die 123 that forms a cavity C together with the dies 123, 122, the slurry S being supplied in an amount such that it is less than the volume of the cavity C when the die 122 has been inserted in the through-hole 121a and has blocked the slurry supply gate 121d, and in the step of obtaining the molded article, the slurry S is compression molded after the die 122 has blocked the slurry supply gate 121d.Type: GrantFiled: October 28, 2008Date of Patent: January 5, 2010Assignee: TDK CorporationInventors: Kazunori Oi, Seiichi Endo, Kazuyuki Satou, Masayuki Ohtsuka, Norihisa Saito, Tsuneki Watanabe
-
Publication number: 20090108970Abstract: A process for production of a magnet which comprises step of supplying a slurry S containing magnetic powder and a dispersing medium into the cavity C of a molding apparatus 12, a step of compression molding the slurry S while applying a magnetic field to the slurry S to obtain a molded article and a step of sintering the molded article to obtain a magnet, wherein the molding apparatus 12 comprises a die 121 having a through-hole 121a into which the slurry S is supplied, a slurry supply gate 121d being formed in the inner wall surface 121b, a die 122 inserted in the through-hole 121a and a die 123 that forms a cavity C together with the dies 123, 122, the slurry S being supplied in an amount such that it is less than the volume of the cavity C when the die 122 has been inserted in the through-hole 121a and has blocked the slurry supply gate 121d, and in the step of obtaining the molded article, the slurry S is compression molded after the die 122 has blocked the slurry supply gate 121d.Type: ApplicationFiled: October 28, 2008Publication date: April 30, 2009Applicant: TDK CorporationInventors: Kazunori OI, Seiichi ENDO, Kazuyuki SATOU, Masayuki OHTSUKA, Norihisa SAITO, Tsuneki WATANABE
-
Publication number: 20070231253Abstract: A hydrogen manufacturing apparatus for manufacturing hydrogen by utilizing heat generated in a nuclear plant. The apparatus has a heat exchanger or steam reformer to be brought into contact with cooling water containing tritium produced from the nuclear plant and a tritium permeation suppressing ceramic coating at least either the outer surface or the inner surface of the heat exchanger or steam reformer for suppressing permeation of tritium. Instead of coating with a tritium permeation suppressing ceramic, a structure prepared by combining at least two types of materials having different crystal structures may be used.Type: ApplicationFiled: January 11, 2007Publication date: October 4, 2007Inventors: Yumiko Tsuchiya, Fumihisa Kano, Norihisa Saito, Seiji Fujiwara
-
Publication number: 20070176329Abstract: The objects of the present invention are to provide a durable magnetic field molding device for producing molded bodies for ferrite magnets, which needs a controlled amount of releasing agent, reduces production cost and improves productivity, and die and magnetic field molding method. The lower die 12B of the die 12 is coated, on the surface which defines the cavity 11, with the coating film 30 with a high hardness and a low friction coefficient, which improves resistance of the lower die 12B surface to wear by the solid component (fine powder) in the slurry, thereby greatly improving durability of the coating film 30 itself and reducing lubricant usage.Type: ApplicationFiled: January 24, 2007Publication date: August 2, 2007Applicant: TDK CORPORATIONInventors: Norihisa Saito, Tomohiro Masuda
-
Publication number: 20070101719Abstract: A steam turbine includes a bucket implanted in a turbine rotor and a nozzle disposed on an upstream side of the bucket and supported by a turbine casing, in which a plurality of stages, each including the bucket and the nozzle, are arranged axially in the turbine so as to define a steam path. A hydrophilic coating portion is disposed in the entire area or an area of at least one portion of a circumferential surface of the turbine rotor, surfaces of the nozzles, surfaces of the buckets, and an inner circumferential surface of the turbine casing.Type: ApplicationFiled: October 27, 2006Publication date: May 10, 2007Inventors: Yoshiki Niizeki, Akio Sayano, Naoki Shibukawa, Norihisa Saito, Masashi Takahashi
-
Publication number: 20060041176Abstract: Chemical decontamination method of dissolving oxide film adhered to contaminated component including, preparing decontamination solution in which ozone is dissolved and oxidation additive agent, which suppresses corrosion of metal base of the contaminated component, is added, and applying the decontamination solution to the contaminated component, thereby to remove the oxide film by oxidation.Type: ApplicationFiled: June 8, 2005Publication date: February 23, 2006Inventors: Masami Enda, Yumi Yaita, Norihisa Saito, Hiromi Aoi, Ichiro Inami, Hitoshi Sakai, Satoshi Hiraragi, Yoshinari Takamatsu
-
Patent number: 6749816Abstract: A high-pressure treatment apparatus comprises a first solid reservoir, a second solid reservoir connected to the first solid reservoir through a first connecting pipe, a high-pressure reactor connected to the second solid reservoir through a second connecting pipe, means for feeding reaction medium into the high-pressure reactor, a first sealing unit and a second sealing unit intervened respectively in the first connecting pipe and second connecting pipe, a first fluid feed unit for feeding a first fluid between the first sealing unit and the second sealing unit, a second fluid feed unit for feeding a second fluid between the second sealing unit and the high-pressure reactor, and means for opening the second sealing unit at the time of shut-off of the first sealing unit and controlling the first fluid and the second fluid to form a pressure-gradient so that pressure between the first sealing unit and the second sealing unit and pressure between the second sealing unit and the high-pressure reactor decrease grType: GrantFiled: December 27, 1999Date of Patent: June 15, 2004Assignee: Kabushiki Kaisha ToshibaInventors: Yutaka Hasegawa, Kazuya Yamada, Yoshie Akai, Norihisa Saito, Yoshikazu Matsubayashi, Yasushi Yamaguchi, Hisao Oomura, Yumiko Abe, Atsushi Ohara
-
Patent number: 6091532Abstract: It is an object of this invention to provide an optical element molding method capable of correcting local processing errors in an optical element without increasing the size of an apparatus or raising the manufacturing cost.Type: GrantFiled: May 23, 1996Date of Patent: July 18, 2000Assignee: Canon Kabushiki KaishaInventors: Hiroshi Nakanishi, Norihisa Saito, Toshinori Ando, Hisakazu Morinaga
-
Patent number: 5549855Abstract: It is an object of this invention to provide an optical element molding method capable of correcting local processing errors in an optical element without increasing the size of an apparatus or raising the manufacturing cost.Type: GrantFiled: June 15, 1994Date of Patent: August 27, 1996Assignee: Canon Kabushiki KaishaInventors: Hiroshi Nakanishi, Norihisa Saito, Toshinori Ando, Hisakazu Morinaga
-
Patent number: 5431514Abstract: A method of processing a leading portion of a rotating workpiece is performed by rotating a tip mounted on a cutter shaft and facing an outer circumferential surface of the workpiece. The tip has a small radius of rotation for high precision processing with small cutting resistance. The leading portion is cut by the tip with the cutter shaft inclined to a side opposite to the leading portion of the workpiece with respect to a direction orthogonal to the axis of rotation of the workpiece.Type: GrantFiled: December 30, 1993Date of Patent: July 11, 1995Assignee: Canon Kabushiki KaishaInventors: Norihisa Saito, Masaichi Sato
-
Patent number: 5095321Abstract: A liquid jet recording head comprises a first substrate provided with an energy-generating element that generates an energy for discharging a recording liquid, a second substrate joining to the first substrate, the second substrate having grooves that form passages for the recording liquid in accordance to the position of the energy-generating element at the joining and being integrated with a discharge port-forming member that forms discharge ports for the recording liquid on the front side of the grooves, and a force-endowing member that tightly fixes the first and second substrates to each other by a mechanically endowed force. The head has a high reliability and can be produced in a high productivity at a low cost with a smaller number of production steps.Type: GrantFiled: October 30, 1989Date of Patent: March 10, 1992Assignee: Canon Kabushiki KaishaInventors: Akio Saito, Makiko Kimura, Tsutomu Abe, Hiroshi Nakagomi, Takashi Watanabe, Norihisa Saito, Kunihiko Maeoka, Kazuaki Masuda
-
Patent number: 4842354Abstract: A rotary polygonal mirror has a base member with a portion of a polygonal cross-section constructed of such a relatively light-weight material as can easily be formed into a relatively complicated configuration. The polygonal portion includes a reflective mirror face formed on one or more sidewalls thereof. A method of making such rotary polygonal mirror includes the step of molding the base member with or without subjecting one or more sidewalls of the polygonal portion to a precision cutting to form a reflective mirror face thereon.Type: GrantFiled: February 24, 1986Date of Patent: June 27, 1989Assignee: Canon Kabushiki KaishaInventors: Kimio Takahashi, Norihisa Saito
-
Patent number: 4826271Abstract: A rotational polygon mirror and a method of manufacture thereof comprising a base member having a polygonal pole-like portion, the base member being formed of a relatively light-weight material which can be easily molded into a complicated shape, and a coating film which is provided on one or more side surfaces of the polygonal pole-like portion and on which a reflecting mirror surface is formed, the coating film being of at least one layer structure.Type: GrantFiled: August 22, 1985Date of Patent: May 2, 1989Assignee: Canon Kabushiki KaishaInventors: Kimio Takahashi, Norihisa Saito, Kunio Takada
-
Patent number: 4556285Abstract: In making reflection mirrors for optics, a technique is provided for making up a reflection mirror not of a glass-system material but of metallic material, and a method for high-precision mirror-machining of a metal plate is also disclosed.Type: GrantFiled: March 19, 1984Date of Patent: December 3, 1985Assignee: Canon Kabushiki KaishaInventors: Yoji Sugiura, Hironori Yamamoto, Keijiro Nishida, Naoki Shirai, Kimio Takahashi, Mikio Nakasugi, Norihisa Saito