Patents by Inventor Norio Kawashima
Norio Kawashima 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: 8761331Abstract: A control rod for a boiling water reactor is provided with a structure element having mutually-perpendicular four blades. The four blades have a neutron absorber-filling region that neutron absorber is held, respectively. In the structure element, a plurality of regions formed in an axial direction of the control rod include a first region having a first cross-section that forms a first united cruciform cross-section of the four blades connected one another, a second region having a second cross-section that has each separated cross-section of the four blades, and a third region having a third cross-section that has a second united cross-section of continuous two blades of the four blades, disposed in a diametrically opposite direction and facing each other and each separated cross-section of remaining two blades of the four blades, disposed perpendicularly to the continuous two blades.Type: GrantFiled: August 30, 2010Date of Patent: June 24, 2014Assignee: Hitachi-GE Nuclear Energy, Ltd.Inventors: Norio Kawashima, Hirofumi Oizumi, Satoru Aoike
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Publication number: 20120243653Abstract: A control rod has four blades, each of which has a rectangular cross section in a plane perpendicular to an axis of the control rod, disposed so as to form a cross-shaped cross section in the plane perpendicular to the axis. The blades include a plurality of aligned square tubes having a square cross section in a plane perpendicular to the axis and including a neutron absorber filling hole filled with neutron absorber, frame plates disposed parallel to the aligned square tubes in a direction perpendicular to a width direction of the blade, and on one side end and another side end of the blade in the width direction, respectively, and cover plates disposed along the width direction and sandwiching the aligned square tubes. Each blade has the aligned square tubes, the frame plates and the cover plates joined together as a single-piece construction by Hot Isostatic Pressing diffusion bonding.Type: ApplicationFiled: February 14, 2012Publication date: September 27, 2012Inventors: Yu Kuwada, Kazuki Kobayashi, Norio Kawashima, Koichi Machida, Toraki Sakuma, Takeshi Tsukamoto, Hidekazu Takazawa
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Patent number: 8213563Abstract: A control rod includes a tie-rod, a handle mounted to an upper end portion of the tie-rod, either a connector plate or a fall velocity limiter mounted to a lower end portion of the tie-rod, sheaths having a U-shaped cross-section, welded intermittently to the tie-rod at a plurality of locations in the axial direction of the tie-rod, and having an upper end welded to the handle and a lower end welded to either the connector plate or the fall velocity limiter, and a neutron absorbing member disposed inside each of the sheaths. An upper end of a weld portion located at uppermost position in an axial direction of the tie-rod among a plurality of weld portions between the tie-rod and the sheath is disposed at a position within a range between 0.8 and 13% of total axial length Ls of the sheath below an upper end of the sheath.Type: GrantFiled: January 24, 2008Date of Patent: July 3, 2012Assignee: Hitachi-GE Nuclear Energy, Ltd.Inventors: Takayuki Arakawa, Koichi Machida, Norio Kawashima, Kazuki Kobayashi, Yoshiharu Kikuchi
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Publication number: 20120148012Abstract: A control rod includes a tie-rod, a handle mounted to an upper end portion of the tie-rod, either a connector plate or a fall velocity limiter mounted to a lower end portion of the tie-rod, sheaths having a U-shaped cross-section, welded intermittently to the tie-rod at a plurality of locations in the axial direction of the tie-rod, and having an upper end welded to the handle and a lower end welded to either the connector plate or the fall velocity limiter, and a neutron absorbing member disposed inside each of the sheaths. An upper end of a weld portion located at uppermost position in an axial direction of the tie-rod among a plurality of weld portions between the tie-rod and the sheath is disposed at a position within a range between 0.8 and 13% of total axial length Ls of the sheath below an upper end of the sheath.Type: ApplicationFiled: January 24, 2008Publication date: June 14, 2012Inventors: Takayuki ARAKAWA, Koichi Machida, Norio Kawashima, Kazuki Kobayashi, Yoshiharu Kikuchi
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Publication number: 20110064182Abstract: A control rod for a boiling water reactor is provided with a structure element having mutually-perpendicular four blades. The four blades have a neutron absorber-filling region that neutron absorber is held, respectively. In the structure element, a plurality of regions formed in an axial direction of the control rod include a first region having a first cross-section that forms a first united cruciform cross-section of the four blades connected one another, a second region having a second cross-section that has each separated cross-section of the four blades, and a third region having a third cross-section that has a second united cross-section of continuous two blades of the four blades, disposed in a diametrically opposite direction and facing each other and each separated cross-section of remaining two blades of the four blades, disposed perpendicularly to the continuous two blades. The first region is disposed in an upper end portion and a lower end portion of the structure element, respectively.Type: ApplicationFiled: August 30, 2010Publication date: March 17, 2011Inventors: Norio KAWASHIMA, Hirofumi Oizumi, Satoru Aoike
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Patent number: 6929324Abstract: In a vehicle seat, a central support member typically consisting of wire mesh or grid and supports most of the load of the vehicle occupant via spring members, and undergoes a relatively large displacement when the occupant is seated in the seat. Thus, by detecting the displacements of various parts of the central support member, preferably peripheral parts thereof, the magnitude of the total load and distribution of the load can be evaluated both reliably and accurately. Additionally, displacement sensors for measuring such large displacements are relatively inexpensive and easy to handle. Also, such sensors would not interfere with the existing seat designs, and would not be adversely affected by the equipment of the seat such as seat heaters.Type: GrantFiled: July 28, 2003Date of Patent: August 16, 2005Assignees: NHK Spring Co., Ltd., The Furukawa Electric Co., Ltd.Inventors: Takayuki Enomoto, Takashi Takeshita, Takuya Nishimoto, Naobumi Kuboki, Katsutoshi Sasaki, Norio Kawashima, Hiroaki Nishiguma, Atsuo Matsumoto, Shinichi Horibata, Ko Masuda, Yuji Niikura, Hiroshi Matsunaga, Yuji Tokiwa
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Publication number: 20040160110Abstract: In a vehicle seat, a central support member typically consisting of wire mesh or grid and supports most of the load of the vehicle occupant via spring members, and undergoes a relatively large displacement when the occupant is seated in the seat. Thus, by detecting the displacements of various parts of the central support member, preferably peripheral parts thereof, the magnitude of the total load and distribution of the load can be evaluated both reliably and accurately. Additionally, displacement sensors for measuring such large displacements are relatively inexpensive and easy to handle. Also, such sensors would not interfere with the existing seat designs, and would not be adversely affected by the equipment of the seat such as seat heaters.Type: ApplicationFiled: July 28, 2003Publication date: August 19, 2004Inventors: Takayuki Enomoto, Takashi Takeshita, Takuya Nishimoto, Naobumi Kuboki, Katsutoshi Sasaki, Norio Kawashima, Hiroaki Nishiguma, Atsuo Matsumoto, Shinichi Horibata, Ko Masuda, Yuji Niikura, Hiroshi Matsunaga, Yuji Tokiwa
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Patent number: 6654438Abstract: A control rod for a BWR according to the present invention comprises a first unit composed of a tie rod, a handle mounted on an axially upper portion of the tie rod and a lower support member or falling speed limiter mounted on a axially lower portion of the tie rod; and a second unit composed of a sheath containing therein reactivity control material, an upper end plate mounted on an axially upper portion of the sheath and a lower end plate mounted on an axially lower portion of the sheath, wherein an upper portion of the upper end plate is fixed to the handle, a lower portion of the lower end plate is fixed to the lower support member or falling speed limiter, whereby the control rod is constructed as a joined body of the first unit and the second unit.Type: GrantFiled: July 30, 2001Date of Patent: November 25, 2003Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.Inventors: Yasuyuki Gotoh, Norio Kawashima, Akira Koizumi, Yoshiharu Kikuchi
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Patent number: 6574295Abstract: In order to provide a boiling water type nuclear reactor use control rod with a guide use roller which improves corrosive environment at a clearance in the guide use roller and suppresses a generation of stress corrosion cracking while maintaining sliding function of the control rod by the guide use roller, at least one of a handle 5, a lower portion supporting plate 2a and a dropping speed limiter 2 is provided with the guide use roller, and a space which causes water flow in a clearance between a pin 9 and a pin hole 12 in the guide use roller is provided adjacent the clearance.Type: GrantFiled: September 17, 2001Date of Patent: June 3, 2003Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.Inventors: Michio Nakayama, Norio Kawashima, Shinobu Okido
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Publication number: 20030053581Abstract: A control rod for a BWR according to the present invention comprises a first unit composed of a tie rod, a handle mounted on an axially upper portion of the tie rod and a lower support member or falling speed limiter mounted on a axially lower portion of the tie rod; and a second unit composed of a sheath containing therein reactivity control material, an upper end plate mounted on an axially upper portion of the sheath and a lower end plate mounted on an axially lower portion of the sheath, wherein an upper portion of the upper end plate is fixed to the handle, a lower portion of the lower end plate is fixed to the lower support member or falling speed limiter, whereby the control rod is constructed as a joined body of the first unit and the second unit.Type: ApplicationFiled: July 15, 2002Publication date: March 20, 2003Inventors: Yasuyuki Gotoh, Norio Kawashima, Akira Koizumi, Yoshiharu Kikuchi
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Publication number: 20020118788Abstract: In order to provide a boiling water type nuclear reactor use control rod with a guide use roller which improves corrosive environment at a clearance in the guide use roller and suppresses a generation of stress corrosion cracking while maintaining sliding function of the control rod by the guide use roller, at least one of a handle 5, a lower portion supporting plate 2a and a dropping speed limiter 2 is provided with the guide use roller, and a space which causes water flow in a clearance between a pin 9 and a pin hole 12 in the guide use roller is provided adjacent the clearance.Type: ApplicationFiled: September 17, 2001Publication date: August 29, 2002Applicant: Hitachi, Ltd.Inventors: Michio Nakayama, Norio Kawashima, Shinobu Okido
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Patent number: 6333955Abstract: To reduce the manufacturing processes of a control rod and shorten the time required for manufacturing a control rod, for the lower part support member 7, the thin parts 11A and 11B are formed in the neighborhood of each of the left and right sides of the window 8. In the left and right sides of the pull-up handle 9, the grooves 17A and 17B are formed respectively. The groove 17B is deeper than the groove 17A. The thin part 11A is fitted into the groove 17A and the thin part 11B is fitted into the groove 17B. The gap formed between the end of the thin part 11B and the bottom of the groove 17B is larger than the gap formed between the end of the thin part 11A and the bottom of the groove 17A. Therefore, the thin part 11A can be simply fitted into the groove 17A.Type: GrantFiled: January 27, 2000Date of Patent: December 25, 2001Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.Inventors: Norio Kawashima, Yasuyuki Gotoh, Yasuhiro Aizawa, Akira Koizumi, Kouichi Machida, Yoshiharu Kikuchi
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Patent number: 6028906Abstract: The present invention relates to a control rod installed in a boiling water reactor (BWR), and particularly to a control rod using metal. An object of the present invention is to provide a manufacturing method of a control rod for a boiling water reactor, having excellent corrosion resistance in high temperature water and excellent wear resistance at the time of fabrication, and in which the influence of the manufacturing process is slight. In order to achieve the above described object, the present invention provides a manufacturing method of a control rod for a boiling water reactor constructed with sheaths having a U-shaped cross section attached to each end of a tie rod having a cruciform cross section, and rod, plate or oval tube cross section metal hafnium type neutron absorber material contained inside the sheaths, in which an anodized film is provided on a surface of the neutron absorber material as a pre-process of assembly of the neutron absorber material in the structure of the control rod.Type: GrantFiled: August 17, 1998Date of Patent: February 22, 2000Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.Inventors: Norio Kawashima, Yasuyuki Gotoh, Akira Koizumi, Kouichi Machida, Yoshiharu Kikuchi, Takayoshi Yasuda, Yoshitaka Nishino
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Patent number: 5164153Abstract: A control rod assembly for a boiling water reactor comprises a tie-rod of a cross-shaped section, and four sheaths. Each of the sheaths is of a U-shaped section and mounted to the respective arms of the tie-rod. One or more neutron absorber materials are disposed within a space defined by the arm and the sheath. The neutron absorber material is axially separated into two portions. One of two portions is supported by a supporting member. The other portion is suspended by a handle.Type: GrantFiled: September 16, 1991Date of Patent: November 17, 1992Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.Inventors: Takashi Fukumoto, Hiromasa Hirakawa, Norio Kawashima, Yasuhiro Aizawa, Hideaki Ishizaki
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Patent number: 5039849Abstract: A card conveying structure for card accessing devices, comprising: a casing defining a card inlet and a card guideway; a drive pulley and a driven pulley supported on one side of the card guideway by a first pivot axis and a second pivot axis, respectively, defining a zero or small angle relative to a vertical line perpendicular to a major surface of a card guided by the guideway; and an endless belt passed around the two pulleys, effective diameters of the first and second pulleys being selected in relation with spacings of the pivot axes relative to the card guideway so that a linear span ofthe belt may extend along the guideway and abut the major surface of the card. By urging the linear span of the belt against the card, the card may be conveyed by the movement of the belt. Alternatively, by slanting at least one of the pulleys towards the guideway until its periphery or the belt passed around it comes into contact with the card, the movement of the belt or the pulley can be transmitted to the card.Type: GrantFiled: June 30, 1989Date of Patent: August 13, 1991Assignee: NHK Spring Co., Ltd.Inventors: Osamu Tano, Norio Kawashima
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Patent number: 4916406Abstract: An automatic gain control circuit comprising an input terminal means for receiving first and second signals, an amplifier for receiving and amplifying first and second signals and outputting a first output signal when receives the first signal and outputting a second output signal when receives the second signals, input means for receiving an operation control signal and responsive to the operation control signal for separately inputting the first and second signals to the amplifier with a predetermined interval of time, control signal generating means responsive to the second output signal of the amplifier for generating a control signal, selection means connected to the input means for supplying the second output signal of the amplifier to the control signal generating means when the second signal is fed to the amplifier and sending out the first output signals to an external circuit when the first signal is fed to the amplifier and gain control means connected to the amplifier and the control signal generaType: GrantFiled: February 27, 1989Date of Patent: April 10, 1990Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Kiyoshi Ichimura, Kozo Yasuhara, Norio Kawashima
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Patent number: 4859098Abstract: A paper feeder for a printer which is adapted for feeding both continuous printing paper and cut sheet printing paper. A second frame which may carry the platen supports the rear end of a first frame which in turn supports the tractor feeder in such a manner that the first frame can be rotated backward from a first position adapted for feeding continuous paper to a second position adapted for making a room for mounting a paper guide to the printer. If the tractor feeder is adapted for pushing continuous paper towards the platen, continuous paper can be kept on the tractor feeder even when the second frame is at its second position.Type: GrantFiled: March 17, 1988Date of Patent: August 22, 1989Inventors: Norio Kawashima, Hidemi Haga
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Patent number: 4822184Abstract: A paper feeder for a printer having a platen and a tractor feeder which is provided with a pin belt having pins projecting from upper and lower surface of the tractor feeder, and the tractor feeder can be selectively placed either one of a first position in which the paper feeding plane of the paper feeding pins of the lower surface of the tractor feeder aligns with a tangential direction of a lower part of the platen and a second position in which the paper feeding plane of the paper feeding pins of the upper surface is aligned with a tangential direction of an upper part of the platen. Preferably, the tractor feeder can be held at a third position which is intermediate between the first and the second position and a middle plane between the upper and the lower paper feeding plane align with a radial line of the platen.Type: GrantFiled: March 17, 1988Date of Patent: April 18, 1989Inventors: Norio Kawashima, Hidemi Haga