Patents by Inventor Kenta Yamamoto
Kenta Yamamoto 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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Publication number: 20120050442Abstract: According to one embodiment, a printing device includes a printing unit configured to print on a recording medium including a wireless tag and a conveying unit configured to convey the recording medium to the printing unit along a conveying path. The printing device further includes an antenna unit configured to write data on the wireless tag by radiating an electromagnetic wave, a moving unit configured to move the antenna unit along the conveying path, and a control unit configured to control the moving unit to move the antenna unit so that the antenna unit is capable of writing data on the wireless tag, while the conveying unit is conveying the recording medium to the printing unit.Type: ApplicationFiled: August 26, 2011Publication date: March 1, 2012Applicant: TOSHIBA TEC KABUSHIKI KAISHAInventor: Kenta Yamamoto
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Publication number: 20120034531Abstract: A secondary battery capable of safely improving a battery performance is provided. An electrolyte with which a separator 13 is impregnated contains an alkyl sulfone and a low-polar solvent (a solvent having a relative permittivity of 20 or less) together with an aluminum salt. The alkyl sulfone facilitates the redox reaction of aluminum, and further reduces the reactivity of the electrolyte. Additionally, the low-polar solvent suppresses the block of the redox reaction of aluminum. In charge and discharge, it becomes easy to electrochemically efficiently precipitate and dissolve aluminum, and further to inhibit the corrosion of a metallic exterior package member or the like.Type: ApplicationFiled: April 9, 2010Publication date: February 9, 2012Applicant: SONY CORPORATIONInventors: Yui Senda, Kenta Yamamoto, Yuri Nakayama, Reina Ito
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Patent number: 8018747Abstract: Disclosed is a PWM rectifier in which switching losses in a semiconductor device are reduced without degrading the response of a control system. In a PWM overmodulation region, the modulation scheme is set to a three-phase modulation scheme. In other regions, a switchover condition such as the amplitude of an input current is acquired and compared with a switchover level. If the switchover condition equals or exceeds the switchover level, the modulation scheme is switched over to a modified two-phase modulation scheme which reduces the number of switching operations to two thirds for the same PWM frequency.Type: GrantFiled: December 18, 2009Date of Patent: September 13, 2011Assignee: Fanuc LtdInventors: Yasusuke Iwashita, Tadashi Okita, Masakazu Niwa, Kenta Yamamoto
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Publication number: 20110111286Abstract: A nonaqueous electrolytic solution containing magnesium ions which shows excellent electrochemical characteristics and which can be manufactured in a general manufacturing environment such as a dry room, and an electrochemical device using the same are provided. A Mg battery has a positive-electrode can 1, a positive-electrode pellet 2 made of a positive-electrode active material or the like, a positive electrode 11 composed of a metallic net supporting body 3, a negative-electrode cup 4, a negative electrode 12 made of a negative-electrode active material 5, and a separator 6 impregnated with an electrolytic solution 7 and disposed between the positive-electrode pellet and the negative-electrode active material.Type: ApplicationFiled: June 4, 2009Publication date: May 12, 2011Applicant: SONY CORPORATIONInventors: Kenta Yamamoto, Yuri Nakayama, Yui Senda
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Publication number: 20100214809Abstract: Disclosed is a PWM rectifier in which switching losses in a semiconductor device are reduced without degrading the response of a control system. In a PWM overmodulation region, the modulation scheme is set to a three-phase modulation scheme. In other regions, a switchover condition such as the amplitude of an input current is acquired and compared with a switchover level. If the switchover condition equals or exceeds the switchover level, the modulation scheme is switched over to a modified two-phase modulation scheme which reduces the number of switching operations to two thirds for the same PWM frequency.Type: ApplicationFiled: December 18, 2009Publication date: August 26, 2010Applicant: FANUC LTDInventors: Yasusuke IWASHITA, Tadashi OKITA, Masakazu NIWA, Kenta YAMAMOTO
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Publication number: 20100196762Abstract: The invention provides a high-capacity positive electrode active material capable of sufficiently exploiting the excellent characteristics of magnesium metal or the like as a negative electrode active material, such as high energy capacity; a method for producing the same; and an electrochemical device using the positive electrode active material. A positive electrode 11 includes a positive electrode can 1, a positive pole pellet 2 having a positive electrode active material and the like, and a metal mesh support 3. A negative electrode 12 includes a negative electrode cap 4 and a negative electrode active material 5 such as magnesium metal. The positive electrode pellet 2 and the negative electrode active material 5 are disposed so as to sandwich a separator 6, and an electrolyte 7 is injected into the separator 6.Type: ApplicationFiled: September 2, 2008Publication date: August 5, 2010Applicant: Sony CorporationInventors: Kenta Yamamoto, Yuri Nakayama
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Publication number: 20100136438Abstract: A magnesium battery (10) is constituted of a negative electrode (1), a positive electrode (2) and an electrolyte (3). The negative electrode (1) is formed of metallic magnesium and can also be formed of an alloy. The positive electrode (2) is composed of a positive electrode active material, for example, a metal oxide, graphite fluoride ((CF)n) or the like, etc. The electrolytic solution (3) is, for example, a magnesium ion-containing nonaqueous electrolytic solution prepared by dissolving magnesium(II) chloride (MgCl2) and dimethylaluminum chloride ((CH3)2AlCl) in tetrahydrofuran (THF). In the case of dissolving and depositing magnesium by using this electrolytic solution, the following reaction proceeds in the normal direction or reverse direction.Type: ApplicationFiled: June 5, 2008Publication date: June 3, 2010Applicant: Sony CorporationInventors: Yuri Nakayama, Kenta Yamamoto, Yoshirio Kudo, Hideki Oki
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Publication number: 20100117568Abstract: A controller of an industrial machine provided with an electric motor, a peripheral apparatus and an amplifier for the motor.Type: ApplicationFiled: October 30, 2009Publication date: May 13, 2010Applicant: FANUC LTDInventors: Yasusuke IWASHITA, Tadashi OKITA, Hiroyuki KAWAMURA, Junichi TEZUKA, Kenta YAMAMOTO
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Patent number: 7682743Abstract: A battery capable of improving the constant output discharge capacity is provided. A battery includes a cathode, an anode, and an electrolyte. The cathode contains iron sulfide. The anode contains lithium metal or a lithium alloy. A ratio of a discharge capacity per unit area of the cathode to a discharge capacity per unit area of the anode (the discharge capacity per unit area of the cathode/the discharge capacity per unit area of the anode) is more than 1 and 1.4 or less.Type: GrantFiled: November 30, 2006Date of Patent: March 23, 2010Assignee: Sony CorporationInventors: Ryosuke Takagi, Naoko Yamakawa, Kenta Yamamoto
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Patent number: 7659031Abstract: A size AA alkaline battery includes an anode principally composed of zinc functioning as an active material, a cathode principally composed of manganese dioxide or nickel oxyhydroxide functioning as an active material, a separator composed of a nonwoven fabric, an electrolyte composed of an aqueous solution of potassium hydroxide, and zinc oxide.Type: GrantFiled: November 8, 2005Date of Patent: February 9, 2010Assignee: Sony CorporationInventors: Kuniyasu Oya, Kenta Yamamoto, Naoko Yamakawa
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Publication number: 20090097830Abstract: A motor drive device (10) including a velocity command preparing means for preparing a velocity command value of a motor (20), a velocity detecting means (21) for detecting a velocity of the motor, a torque command value preparing means (12) for preparing a torque command value of a torque applied to the motor based on the velocity command value and a velocity detection value, and a disturbance load torque estimating means (18) for estimating a disturbance load torque applied to the motor based on a velocity detection value detected by the velocity detecting means and a torque command value prepared by the torque command preparing means, which motor drive device (10) is further provided with at least one of a first filtering means (31) for removing a noise component in the velocity detection value and supplying the velocity detection value to the disturbance load torque estimating means and a second filtering means (32) for removing a noise component in the torque command value and supplying the torque commanType: ApplicationFiled: September 3, 2008Publication date: April 16, 2009Applicant: FANUC LTDInventors: Yasusuke IWASHITA, Tadashi OKITA, Junichi TEZUKA, Kenta YAMAMOTO
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Publication number: 20090068568Abstract: A magnesium ion containing non-aqueous electrolyte in which magnesium ions and aluminum ions are dissolved in an organic etheric solvent, and which is formed by: adding metal magnesium, a halogenated hydrocarbon RX, an aluminum halide AlY3, and a quaternary ammonium salt R1R2R3R4N+Z? to an organic etheric solvent; and applying a heating treatment while stirring them (in the general formula RX representing the halogenated hydrocarbon, R is an alkyl group or an aryl group, X is chlorine, bromine, or iodine, in the general formula AlY3 representing the aluminum halide, Y is chlorine, bromine, or iodine, in the general formula R1R2R3R4N+Z? representing the quaternary ammonium salt, R1, R2, R3, and R4 represent each an alkyl group or an aryl group, and Z? represents chloride ion, bromide ion, iodide ion, acetate ion, perchlorate ion, tetrafluoro borate ion, hexafluoro phosphate ion, hexafluoro arsenate ion, perfluoroalkyl sulfonate ion, or perfluoroalkyl sulfonylimide ion.Type: ApplicationFiled: September 4, 2008Publication date: March 12, 2009Applicant: Sony CorporationInventors: Kenta Yamamoto, Yuri Nakayama
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Publication number: 20070218357Abstract: A battery capable of improving the constant output discharge capacity is provided. A battery includes a cathode, an anode, and an electrolyte. The cathode contains iron sulfide. The anode contains lithium metal or a lithium alloy. A ratio of a discharge capacity per unit area of the cathode to a discharge capacity per unit area of the anode (the discharge capacity per unit area of the cathode/the discharge capacity per unit area of the anode) is more than 1 and 1.4 or less.Type: ApplicationFiled: November 30, 2006Publication date: September 20, 2007Applicant: Sony CorporationInventors: Ryosuke Takagi, Naoko Yamakawa, Kenta Yamamoto
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Patent number: 7122169Abstract: The present invention provides a nickel-zinc battery of an inside-out structure, that is, a battery comprising a positive electrode containing beta-type nickel oxyhydroxide and a negative electrode containing zinc and having a similar structure to an alkali manganese battery, in which the beta-type nickel oxyhydroxide consists of substantially spherical particles, mean particle size of which is within a range from 19 ?m to a maximum of 40 ?m, the bulk density of which is within a range from 1.6 g/cm3 to a maximum of 2.2 g/cm3, tap density of which is within a range from 2.2 g/cm3 to a maximum of 2.7 g/cm3, specific surface area which based on BET method is within a range from 3 m2/g to a maximum of 50 m2/g, and the positive electrode of the nickel zinc battery contains graphite powder, where the weight ratio of graphite powder against a total weight of the positive electrode is defined within a range from 4% to a maximum of 8%.Type: GrantFiled: June 9, 2003Date of Patent: October 17, 2006Assignee: Sony CorporationInventors: Kenta Yamamoto, Osamu Takahashi, Kazuo Honda, Kuniyasu Oya
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Publication number: 20060115731Abstract: A size AA alkaline battery includes an anode principally composed of zinc functioning as an active material, a cathode principally composed of manganese dioxide or nickel oxyhydroxide functioning as an active material, a separator composed of a nonwoven fabric, an electrolyte composed of an aqueous solution of potassium hydroxide, and zinc oxide.Type: ApplicationFiled: November 8, 2005Publication date: June 1, 2006Inventors: Kuniyasu Oya, Kenta Yamamoto, Naoko Yamakawa
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Patent number: 6908707Abstract: The present invention provides a nickel-zinc battery of an inside-out structure, that is, a battery comprising a positive electrode containing beta-type nickel oxyhydroxide and a negative electrode containing zinc and having a similar structure to an alkali manganese battery, in which the beta-type nickel oxyhydroxide consists of substantially spherical particles, mean particle size of which is within a range from 19 ?m to a maximum of 40 ?m, the bulk density of which is within a range from 1.6 g/cm3 to a maximum of 2.2 g/cm3, tap density of which is within a range from 2.2 g/cm3 to a maximum of 2.7 g/cm3, specific surface area which based on BET method is within a range from 3 m2/g to a maximum of 50 m2/g, and the positive electrode of the nickel zinc battery contains graphite powder, where the weight ratio of graphite powder against a total weight of the positive electrode is defined within a range from 4% to a maximum of 8%.Type: GrantFiled: June 9, 2003Date of Patent: June 21, 2005Assignee: Sony CorporationInventors: Kenta Yamamoto, Osamu Takahashi, Kazuo Honda, Kuniyasu Oya
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Publication number: 20050095508Abstract: There is provided a lithium-iron disulfide primary battery capable of suppressing the elevation of the open circuit voltage during the storage of battery. The lithium-iron disulfide primary battery has a positive electrode, which has iron disulfide as a cathode active material, including a cathode composition layer formed on a cathode current collector, a negative electrode including lithium as an anode active material, and an electrolytic solution including an electrolyte dissolved in an organic solvent. The organic solvent includes at least an alkylamide solvent. By this construction of the battery, the elevation of the open circuit voltage of the lithium-iron disulfide primary battery during the storage may be suppressed. Therefore, even after being stored for a long term, the lithium-iron disulfide primary battery can maintain compatibility with 1.5-V class primary batteries and the like.Type: ApplicationFiled: October 28, 2004Publication date: May 5, 2005Applicant: SONY CORPORATIONInventor: Kenta Yamamoto
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Publication number: 20050008936Abstract: The present invention provides an alkaline battery suitable for use as a primary or secondary battery as a power source of electronic appliances. The battery is excellent in discharge characteristics under a heavy load and in cycle characteristics. The alkaline battery (100) comprises a cathode mix (3) containing ?-nickel oxy-hydroxide, an anode mix (5) containing zinc as a main component of anode active material, and an alkali solution as an electrolyte, wherein the cathode mix (3) includes a mixture of ?-nickel oxy-hydroxide, graphite powder, and a potassium hydroxide solution in a given weight ratio. The ?-nickel oxy-hydroxide is prepared by chemical oxidation and has an approximately spherical shape of particle with a mean particle size in the range of 5 to 50 ?m.Type: ApplicationFiled: April 15, 2004Publication date: January 13, 2005Inventors: Akio Takahashi, Shinichiro Morikawa, Naoki Hayashi, Kazuo Honda, Kuniyasu Oya, Kenta Yamamoto, Noriyuki Kobayashi
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Publication number: 20040101754Abstract: A non-aqueous primary cell intended to increase the discharge capacity and lower the operating voltage while reducing the size and weight is provided.Type: ApplicationFiled: December 15, 2003Publication date: May 27, 2004Inventor: Kenta Yamamoto
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Patent number: 6686091Abstract: The present invention provides a nickel-zinc battery of an inside-out structure, that is, a battery comprising a positive electrode containing beta-type nickel oxyhydroxide and a negative electrode containing zinc and having a similar structure to an alkali manganese battery, in which the beta-type nickel oxyhydroxide consists of substantially spherical particles, mean particle size of which is within a range from 19 &mgr;m to a maximum of 40 &mgr;m, the bulk density of which is within a range from 1.6 g/cm3 to a maximum of 2.2 g/cm3, tap density of which is within a range from 2.2 g/cm3 to a maximum of 2.7 g/cm3, specific surface area which based on BET method is within a range from 3 m2/g to a maximum of 50 m2/g, and the positive electrode of the nickel zinc battery contains graphite powder, where the weight ratio of graphite powder against a total weight of the positive electrode is defined within a range from 4% to a maximum of 8%.Type: GrantFiled: April 19, 2001Date of Patent: February 3, 2004Assignee: Sony CorporationInventors: Kenta Yamamoto, Osamu Takahashi, Kazuo Honda, Kuniyasu Oya