Patents by Inventor Yuuji Saito
Yuuji 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).
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Patent number: 8879683Abstract: A jet pump beam is made of improved heat-treated precipitation-hardened nickel base alloy excellent in anti-stress corrosion cracking properties and high-temperature strength, and having high ductility and a high elastic modulus. A jet pump beam 27 made of improved heat-treated nickel base alloy is produced by preparing a precipitation-strengthened nickel base alloy material having a component composition containing by mass %, Ni: 50.0% to 55.0%, Cr: 17.0% to 21.0%, Nb+Ta: 4.75% to 5.50%, Mo: 2.8% to 3.3%, Ti: 0.65% to 1.15%, Al: 0.2% to 0.8%, C: 0.08% or less, Mn: 0.35% or less, Si: 0.35% or less, S: 0.015% or less, P: 0.03% or less, Cu: 0.30% or less, B: 0.006% or less, and Co: 1.0% or less, and Fe and inevitable impurities constituting a remaining part, subjecting the nickel base alloy material to solution heat treatment at a temperature of 1010° C. to 1090° C., and subjecting the nickel base alloy material to age-hardening heat treatment at a temperature of 694° C. to 714° C.Type: GrantFiled: December 1, 2009Date of Patent: November 4, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Yoshinori Katayama, Motoji Tsubota, Yuuji Saito, Hajime Mori, Norihiko Tanaka
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Patent number: 8699652Abstract: A control rod for nuclear reactors includes four wings including neutron absorbers containing hafnium, a front end structural member which has a cross shape in cross section and includes brackets bonded to the leading ends of the wings, and a terminal end structural member which has a cross shape in cross section and includes brackets bonded to the tailing ends of the wings. The four wings are bonded to a wing-bonding member including a cross-shaped center shaft so as to form a cross shape. The front end structural member and the wing-bonding member are made of a zirconium alloy. The wings include neutron-absorbing plates having neutron-absorbing portions and each have an outer surface which is opposed to a fuel assembly and at which a hafnium-zircaloy composite member covered with zircaloy is disposed. The neutron-absorbing plates are opposed to each other with trap spaces disposed therebetween.Type: GrantFiled: February 21, 2008Date of Patent: April 15, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Yuuji Saito, Mitsuharu Nakamura, Makoto Ueda, Yoshinori Katayama, Motoji Tsubota, Satoko Tajima, Yoshiji Karino, Kenichi Yoshioka, Kosaku Tsumita
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Publication number: 20140098925Abstract: A control rod for nuclear reactors includes four wings including neutron absorbers containing hafnium, a front end structural member which has a cross shape in cross section and includes brackets bonded to the leading ends of the wings, and a terminal end structural member which has a cross shape in cross section and includes brackets bonded to the tailing ends of the wings. The four wings are bonded to a wing-bonding member including a cross-shaped center shaft so as to form a cross shape. The front end structural member and the wing-bonding member are made of a zirconium alloy. The wings include neutron-absorbing plates having neutron-absorbing portions and each have an outer surface which is opposed to a fuel assembly and at which a hafnium-zircaloy composite member covered with zircaloy is disposed. The neutron-absorbing plates are opposed to each other with trap spaces disposed therebetween.Type: ApplicationFiled: October 8, 2013Publication date: April 10, 2014Applicant: Kabushiki Kaisha ToshibaInventors: Yuuji Saito, Mitsuharu Nakamura, Makoto Ueda, Yoshinori Katayama, Motoji Tsubota, Satoko Tajima, Yoshiji Karino, Kenichi Yoshioka, Kosaku Tsumita
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Patent number: 8624211Abstract: In one embodiment, a neutron shielding material is formed of boron-adding stainless steel of either austenite-ferrite two-phase stainless steel or ferritic stainless steel, the austenite-ferrite two-phase stainless steel containing, in mass %, B: 0.5% to 2.0%, Ni: 3.0 to 10.0%, and Cr: 21.00 to 32.00%, the ferritic stainless steel containing, in mass %, B: 0.5% to 2.0%, Ni: 4.0% or less, and Cr: 11.00 to 32.00%, and the boron-adding stainless steel being well in ductility and thermal conduction property.Type: GrantFiled: June 12, 2013Date of Patent: January 7, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Masanori Kibata, Yuuji Saito, Motoji Tsubota, Yoshitaka Doken, Makoto Sato, Shunichi Hatano, Masanori Ishiga, Go Ono
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Publication number: 20130287619Abstract: In one embodiment, a neutron shielding material is formed of boron-adding stainless steel of either austenite-ferrite two-phase stainless steel or ferritic stainless steel, the austenite-ferrite two-phase stainless steel containing, in mass %, B: 0.5% to 2.0%, Ni: 3.0 to 10.0%, and Cr: 21.00 to 32.00%, the ferritic stainless steel containing, in mass %, B: 0.5% to 2.0%, Ni: 4.0% or less, and Cr: 11.00 to 32.00%, and the boron-adding stainless steel being well in ductility and thermal conduction property.Type: ApplicationFiled: June 12, 2013Publication date: October 31, 2013Inventors: Masanori Kibata, Yuuji Saito, Motoji Tsubota, Yoshitaka Doken, Makoto Sato, Shunichi Hatano, Masanori Ishiga, Go Ono
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Patent number: 8481986Abstract: In one embodiment, a neutron shielding material is formed of boron-adding stainless steel of either austenite-ferrite two-phase stainless steel or ferritic stainless steel, the austenite-ferrite two-phase stainless steel containing, in mass %, B: 0.5% to 2.0%, Ni: 3.0 to 10.0%, and Cr: 21.00 to 32.00%, the ferritic stainless steel containing, in mass %, B: 0.5% to 2.0%, Ni: 4.0% or less, and Cr: 11.00 to 32.00%, and the boron-adding stainless steel being well in ductility and thermal conduction property.Type: GrantFiled: January 27, 2012Date of Patent: July 9, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Masanori Kibata, Yuuji Saito, Motoji Tsubota, Yoshitaka Doken, Makoto Sato, Shunichi Hatano, Masanori Ishiga, Go Ono
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Publication number: 20120187315Abstract: In one embodiment, a neutron shielding material is formed of boron-adding stainless steel of either austenite-ferrite two-phase stainless steel or ferritic stainless steel, the austenite-ferrite two-phase stainless steel containing, in mass %, B: 0.5% to 2.0%, Ni: 3.0 to 10.0%, and Cr: 21.00 to 32.00%, the ferritic stainless steel containing, in mass %, B: 0.5% to 2.0%, Ni: 4.0% or less, and Cr: 11.00 to 32.00%, and the boron-adding stainless steel being well in ductility and thermal conduction property.Type: ApplicationFiled: January 27, 2012Publication date: July 26, 2012Inventors: Masanori KIBATA, Yuuji SAITO, Motoji TSUBOTA, Yoshitaka DOKEN, Makoto SATO, Shunichi HATANO, Masanori ISHIGA, Go ONO
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Publication number: 20110255649Abstract: A jet pump beam is made of improved heat-treated precipitation-hardened nickel base alloy excellent in anti-stress corrosion cracking properties and high-temperature strength, and having high ductility and a high elastic modulus. A jet pump beam 27 made of improved heat-treated nickel base alloy is produced by preparing a precipitation-strengthened nickel base alloy material having a component composition containing by mass %, Ni: 50.0% to 55.0%, Cr: 17.0% to 21.0%, Nb+Ta: 4.75% to 5.50%, Mo: 2.8% to 3.3%, Ti: 0.65% to 1.15%, Al: 0.2% to 0.8%, C: 0.08% or less, Mn: 0.35% or less, Si: 0.35% or less, S: 0.015% or less, P: 0.03% or less, Cu: 0.30% or less, B: 0.006% or less, and Co: 1.0% or less, and Fe and inevitable impurities constituting a remaining part, subjecting the nickel base alloy material to solution heat treatment at a temperature of 1010° C. to 1090° C., and subjecting the nickel base alloy material to age-hardening heat treatment at a temperature of 694° C. to 714° C.Type: ApplicationFiled: December 1, 2009Publication date: October 20, 2011Applicant: Kabushiki Kaisha ToshibaInventors: Yoshinori Katayama, Motoji Tsubota, Yuuji Saito, Hajime Mori, Norihiko Tanaka
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Publication number: 20080205574Abstract: A control rod for nuclear reactors includes four wings including neutron absorbers containing hafnium, a front end structural member which has a cross shape in cross section and includes brackets bonded to the leading ends of the wings, and a terminal end structural member which has a cross shape in cross section and includes brackets bonded to the tailing ends of the wings. The four wings are bonded to a wing-bonding member including a cross-shaped center shaft so as to form a cross shape. The front end structural member and the wing-bonding member are made of a zirconium alloy. The wings include neutron-absorbing plates having neutron-absorbing portions and each have an outer surface which is opposed to a fuel assembly and at which a hafnium-zircaloy composite member covered with zircaloy is disposed. The neutron-absorbing plates are opposed to each other with trap spaces disposed therebetween.Type: ApplicationFiled: February 21, 2008Publication date: August 28, 2008Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yuuji SAITO, Mitsuharu NAKAMURA, Makoto UEDA, Yoshinori KATAYAMA, Motoji TSUBOTA, Satoko TAJIMA, Yoshiji KARINO, Kenichi YOSHIOKA, Kosaku TSUMITA
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Patent number: 6377017Abstract: A control device for an alternating current motor includes: a target current generating unit which generates a current order value, based on a torque order, as a d-axis target current and a q-axis target current on dq coordinates; a current detection device which detects an alternating current supplied to each phase of a polyphase alternating current motor; a coordinate transforming unit which transforms the alternating current detected by the current detection device into a d-axis current and a q-axis current on the dq coordinates; and a vector control unit which carries out a current feedback control so that the d-axis current follows up the d-axis target current and the q-axis current follows up the q-axis target current.Type: GrantFiled: December 20, 2000Date of Patent: April 23, 2002Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Hajime Kondou, Yuuji Saito, Hideyuki Jinzai, Kazuaki Takizawa, Hiroaki Shinoki, Tomoyuki Itoh
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Publication number: 20010015631Abstract: A control apparatus for an electric vehicle is provided, which is capable of reducing the weight of the electric vehicle and preventing the inverter circuit from overheating. When the vehicle stops on an uphill due to stalling, the control unit 30 starts counting the time over which current is supplied through the same IGBT element. When the count value reaches a value corresponding to the time at which the IGBT 40 starts generating heat, the control unit 30 outputs a control signal to reduce the motor driving current to the IPM 20. The rotation sensor 60 detects the rotational position when the motor rotates in the reverse direction, while the reduction of the motor driving current reduces the driving power of the motor. Based on the detection of the rotational position, the control unit 30 performs switching of the phase of the IGBT 40, and when the normal current supply phase is connected, the motor driving current which drives the motor is increased.Type: ApplicationFiled: December 11, 2000Publication date: August 23, 2001Inventors: Iwao Shimane, Satoru Adachi, Hiroaki Takanohashi, Yuuji Saito, Hajime Kondou, Kenichirou Kimura
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Publication number: 20010006335Abstract: A control device for an alternating current motor includes: a target current generating unit which generates a current order value, based on a torque order, as a d-axis target current and a q-axis target current on dq coordinates; a current detection device which detects an alternating current supplied to each phase of a polyphase alternating current motor; a coordinate transforming unit which transforms the alternating current detected by the current detection device into a d-axis current and a q-axis current on the dq coordinates; and a vector control unit which carries out a current feedback control so that the d-axis current follows up the d-axis target current and the q-axis current follows up the q-axis target current.Type: ApplicationFiled: December 20, 2000Publication date: July 5, 2001Applicant: HONDA GIKEN KOGYO KABUSHIKIKAISHAInventors: Hajime Kondou, Yuuji Saito, Hideyuki Jinzai, Kazuaki Takizawa, Hiroaki Shinoki
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Patent number: 4984780Abstract: A stacker for storing a plurality of stimulable phosphor sheets has a plurality of stock plates defining a plurality of sheet bins for storing the stimulable phosphor sheets respectively therein. The stock plates are slidably supported on and between two holder members. One of the sheet bins is selected and relatively brought into confronting relation to a feed roller pair. The stimulable phosphor sheet stored in the selected sheet bin can be displaced toward the feed roller pair by displacing the stock plate which defines the selected sheet bin.Type: GrantFiled: March 17, 1989Date of Patent: January 15, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Yuuji Saito, Makoto Ogoda