Patents by Inventor Hirotaka Sakamaki
Hirotaka Sakamaki 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: 11954550Abstract: In a card reader, an interfering magnetic field generation mechanism 11 includes a core part 14a, a core part 14b, and a core part 15a, each of which is formed of soft magnetic material in a straight line, a coil 16 that is wound around the core part 14a, a coil 17 that is connected to the coil 16 in series and is wound around the core part 14b, a coil 18 that is wound around the core part 15a, a first drive circuit that supplies alternating current to the coils 16 and 17, and a second drive circuit that supplies alternating current to the coil 18. The core part 15a is disposed between the core part 14a and the core part 14b. The core part 15a is formed independently of the core parts 14a and 14b, and is separated from the core parts 14a and 14b.Type: GrantFiled: June 4, 2020Date of Patent: April 9, 2024Assignee: NIDEC SANKYO CORPORATIONInventor: Hirotaka Sakamaki
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Patent number: 11657239Abstract: Provided are a disturbing magnetic field generator and a card reader capable of suppressing the generation of noise caused by vibration of a core. A disturbing magnetic field generator that generates a disturbing magnetic field for disturbing unauthorized reading of magnetic data recorded on a card includes a coil to generate the disturbing magnetic field, a bobbin including a tubular body part in which the coil is wound on an outer peripheral side, and a core disposed inside the tubular body part. A first gap is provided between the tubular body part and the core.Type: GrantFiled: June 24, 2021Date of Patent: May 23, 2023Assignee: NIDEC SANKYO CORPORATIONInventor: Hirotaka Sakamaki
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Publication number: 20220335232Abstract: In a card reader, an interfering magnetic field generation mechanism 11 includes a core part 14a, a core part 14b, and a core part 15a, each of which is formed of soft magnetic material in a straight line, a coil 16 that is wound around the core part 14a, a coil 17 that is connected to the coil 16 in series and is wound around the core part 14b, a coil 18 that is wound around the core part 15a, a first drive circuit that supplies alternating current to the coils 16 and 17, and a second drive circuit that supplies alternating current to the coil 18. The core part 15a is disposed between the core part 14a and the core part 14b. The core part 15a is formed independently of the core parts 14a and 14b, and is separated from the core parts 14a and 14b.Type: ApplicationFiled: June 4, 2020Publication date: October 20, 2022Applicant: NIDEC SANKYO CORPORATIONInventor: Hirotaka SAKAMAKI
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Publication number: 20210406488Abstract: Provided are a disturbing magnetic field generator and a card reader capable of suppressing the generation of noise caused by vibration of a core. A disturbing magnetic field generator that generates a disturbing magnetic field for disturbing unauthorized reading of magnetic data recorded on a card includes a coil to generate the disturbing magnetic field, a bobbin including a tubular body part in which the coil is wound on an outer peripheral side, and a core disposed inside the tubular body part. A first gap is provided between the tubular body part and the core.Type: ApplicationFiled: June 24, 2021Publication date: December 30, 2021Inventor: Hirotaka SAKAMAKI
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Patent number: 10783333Abstract: A magnetic jammer for a card reader and structured to generate a magnetic field for jamming illegal reading of magnetic data stored on a card may include a core including magnetic material; a coil wound around the core and structured to generate a jamming magnetic field; a case accommodating the core and the coil; and a resin sealant filling the inside of the case and covering the core and the coil. The core and the coil may be disposed apart from an inner face of the case such that the core and the coil do not come into contact with the inner face of the case. A portion of the resin sealant may be disposed between the core and the inner face of the case and between the coil and the inner face of the case.Type: GrantFiled: March 25, 2019Date of Patent: September 22, 2020Assignee: NIDEC SANKYO CORPORATIONInventor: Hirotaka Sakamaki
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Publication number: 20190305872Abstract: A magnetic jammer for a card reader and structured to generate a magnetic field for jamming illegal reading of magnetic data stored on a card may include a core comprising magnetic material; and a coil wound around the core and structured to generate a jamming magnetic field. The core may include a plurality of separable core segments integrated into a single unit.Type: ApplicationFiled: March 25, 2019Publication date: October 3, 2019Inventor: Hirotaka SAKAMAKI
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Publication number: 20190303627Abstract: A magnetic jammer for a card reader and structured to generate a magnetic field for jamming illegal reading of magnetic data stored on a card may include a core including magnetic material; a coil wound around the core and structured to generate a jamming magnetic field; a case accommodating the core and the coil; and a resin sealant filling the inside of the case and covering the core and the coil. The core and the coil may be disposed apart from an inner face of the case such that the core and the coil do not come into contact with the inner face of the case. A portion of the resin sealant may be disposed between the core and the inner face of the case and between the coil and the inner face of the case.Type: ApplicationFiled: March 25, 2019Publication date: October 3, 2019Inventor: Hirotaka SAKAMAKI
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Patent number: 10043044Abstract: A card reader may include a card insertion port; a card passage; and a disturbing magnetic field generator. The disturbing magnetic field generator may include a first disturbing magnetic field generation part and a second disturbing magnetic field generation part which are disposed so as to interpose the card passage. The first disturbing magnetic field generation part may include a first core formed of magnetic material and a coil wound around the first core, and the second disturbing magnetic field generation part may include a second core formed of magnetic material and a coil wound around the second core.Type: GrantFiled: February 10, 2015Date of Patent: August 7, 2018Assignee: NIDEC SANKYO CORPORATIONInventors: Katsuhisa Higashi, Ikuro Kuribayashi, Hirotaka Sakamaki, Tomomi Takeda, Keiji Hoson, Mamoru Mizawa
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Publication number: 20180196971Abstract: A card reader for use with a card having a magnetic stripe may include a card insertion port into which the card is inserted; a card passage along which the card is passed; and a disturbing magnetic field generation means structured to generate a magnetic field for disturbing illegal reading of magnetic data recorded in the magnetic stripe. The disturbing magnetic field generation means may include a plurality of coils which are serially-connected with each other; a capacitor connected in parallel with the plurality of the coils; and a drive circuit structured to supply an electric current to the plurality of the coils.Type: ApplicationFiled: June 23, 2015Publication date: July 12, 2018Inventor: Hirotaka SAKAMAKI
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Publication number: 20170249485Abstract: A card reader may include a card insertion port; a card passage; and a disturbing magnetic field generator. The disturbing magnetic field generator may include a first disturbing magnetic field generation part and a second disturbing magnetic field generation part which are disposed so as to interpose the card passage. The first disturbing magnetic field generation part may include a first core formed of magnetic material and a coil wound around the first core, and the second disturbing magnetic field generation part may include a second core formed of magnetic material and a coil wound around the second core.Type: ApplicationFiled: February 10, 2015Publication date: August 31, 2017Inventors: Katsuhisa HIGASHI, Ikuro KURIBAYASHI, Hirotaka SAKAMAKI, Tomomi TAKEDA, Keiji HOSON, Mamoru MIZAWA
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Patent number: 9626820Abstract: A card reader may include a card insertion port; a card passage; and a disturbing magnetic field generator. The disturbing magnetic field generator may include a core part including a core formed and a disturbing magnetic field generation coil wound around the core. The core part may include a first end face and a second end face which are disposed so as to face substantially the front side. The disturbing magnetic field generator may generate a disturbing magnetic field whose flux line changes into a direction from the first end face toward the second end face and a direction from the second end face toward the first end face. The direction of the magnetic flux lines are substantially parallel to the passing direction of the card. In a width and thickness direction of the card, the magnetic flux line crosses a position where the magnetic stripe is passed.Type: GrantFiled: March 5, 2015Date of Patent: April 18, 2017Assignee: NIDEC SANKYO CORPORATIONInventors: Hirotaka Sakamaki, Yukihiko Takita
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Publication number: 20170018135Abstract: A card reader may include a card insertion port; a card passage; and a disturbing magnetic field generator. The disturbing magnetic field generator may include a core part including a core formed and a disturbing magnetic field generation coil wound around the core. The core part may include a first end face and a second end face which are disposed so as to face substantially the front side. The disturbing magnetic field generator may generate a disturbing magnetic field whose flux line changes into a direction from the first end face toward the second end face and a direction from the second end face toward the first end face. The direction of the magnetic flux lines are substantially parallel to the passing direction of the card. In a width and thickness direction of the card, the magnetic flux line crosses a position where the magnetic stripe is passed.Type: ApplicationFiled: March 5, 2015Publication date: January 19, 2017Inventors: Hirotaka SAKAMAKI, Yukihiko TAKITA
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Patent number: 6514630Abstract: To provide a contact material suitable for a commutator of a micromotor which can improve wear resistance and prolong the life of the micromotor by improving an Au-based clad composite material provided at an outermost layer with Au or an Au alloy. The present invention provides the Au-based clad composite material including a surface of a contact substrate having an Ag—Cu—Si alloy layer cladded with Au or the Au alloy, wherein an intermetallic compound Cu—Si is dispersed and deposited in Au or the Au alloy.Type: GrantFiled: June 21, 2001Date of Patent: February 4, 2003Assignees: Sankyo Seiki Mfg. Co., Ltd., Tanaka Kikinzoku Kogyo K.K.Inventors: Mii Matsuzawa, Hirotaka Sakamaki, Osamu Matsuzawa
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Publication number: 20020018910Abstract: To provide a contact material suitable for a commutator of a micromotor which can improve wear resistance and prolong the life of the micromotor by improving an Au-based clad composite material provided at an outermost layer with Au or an Au alloy. The present invention provides the Au-based clad composite material including a surface of a contact substrate having an Ag—Cu—Si alloy layer cladded with Au or the Au alloy, wherein an intermetallic compound Cu—Si is dispersed and deposited in Au or the Au alloy.Type: ApplicationFiled: June 21, 2001Publication date: February 14, 2002Applicant: Sankyo Seiki Mfg. Co., Ltd.Inventors: Mii Matsuzawa, Hirotaka Sakamaki, Osamu Matsuzawa
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Patent number: 5457350Abstract: A laminated core for a rotating electric machine comprising a plurality of single sheet cores, each single-sheet core being formed by arranging a plurality of salient poles continuously on a beltlike yoke plate and winding the beltlike yoke plate so as to be cylindrical while joining both ends of the beltlike yoke plate, wherein the laminated core is cylindrical and has a plurality of salient poles confronting a magnet, each salient pole having a winding and the laminated core is formed by laminating a plurality of the single-sheet cores.Type: GrantFiled: July 28, 1993Date of Patent: October 10, 1995Assignee: Kabushiki Kaisha Sankyo Seiki SeisakushoInventors: Hirotaka Sakamaki, Masayuki Ishikawa, Hidetoshi Shimada, Shizunori Mitsuma, Hiroshi Zenisawa, Kiyoshi Nagashima, Noboru Takarasawa