Patents by Inventor Yuko Kanazawa
Yuko Kanazawa 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: 10224139Abstract: A coil device includes two core members, one of which is E-shaped. The E-shaped core member has left and right side faces, and a center leg that extends in a vertical direction. A conducting wire is wound around a core, the core being composed of the two core members arranged to face each other in the vertical direction with a gap between the two core members. The conducting wire is wound around the center leg. First and second heat-sinking plates made of metal are bent so as to be in contact with upper and side faces of the core. The first and second plates are arranged so that first edges of the plates are placed left-right symmetrically with respect to the core with a gap between the edges. Second edges of the plates are in contact with a metal heat-sinking board where the core is placed.Type: GrantFiled: September 18, 2015Date of Patent: March 5, 2019Assignee: FDK CorporationInventors: Yuko Kanazawa, Masaru Shinoda, Kiyoto Ono, Tetsu Yamanaka, Mikio Kitaoka
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Patent number: 9978491Abstract: A choke coil including a coil (6) and a core (1) including a first core part (5) inserted into a central hole of the coil (6) and a plurality of second core parts (4) disposed along the outer periphery of the coil. The first core part (5) and the second core part (4) form a closed magnetic path. The second core parts (4) are shaped so that the total sum of the areas of cross sections thereof perpendicular to the axis of the coil is greater than the area of a cross section of the first core part (5). A gap part (G) is formed in the second core parts (4), and a ferrite magnet (7) that applies a magnetic bias is disposed in the gap part (G).Type: GrantFiled: February 8, 2013Date of Patent: May 22, 2018Assignee: FDK CORPORATIONInventors: Masaru Ota, Mikio Kitaoka, Yuko Kanazawa
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Publication number: 20170243688Abstract: A coil device includes two core members, one of which is E-shaped. The E-shaped core member has left and right side faces, and a center leg that extends in a vertical direction. A conducting wire is wound around a core, the core being composed of the two core members arranged to face each other in the vertical direction with a gap between the two core members. The conducting wire is wound around the center leg. First and second heat-sinking plates made of metal are bent so as to be in contact with upper and side faces of the core. The first and second plates are arranged so that first edges of the plates are placed left-right symmetrically with respect to the core with a gap between the edges. Second edges of the plates are in contact with a metal heat-sinking board where the core is placed.Type: ApplicationFiled: September 18, 2015Publication date: August 24, 2017Inventors: Yuko KANAZAWA, Masaru SHINODA, Kiyoto ONO, Tetsu YAMANAKA, Mikio KITAOKA
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Patent number: 9568500Abstract: An electrical test probe according to an embodiment includes a probe main body portion having a connection end to a circuit of a probe base plate and made of a first metal material with resiliency, and a probe tip portion having a probe tip, made of a second metal material with higher hardness than that of the first metal material for the probe main body portion, and communicating with the probe main body portion, wherein the probe main body portion and the probe tip portion are provided with a current path made of an equal metal material extending from the probe tip to the connection end.Type: GrantFiled: May 9, 2013Date of Patent: February 14, 2017Assignee: Kabushiki Kaisha Nihon MicronicsInventors: Hideki Hirakawa, Yuko Kanazawa
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Publication number: 20150042433Abstract: Problem to be Solved To provide a choke coil that can apply an optimal magnetic bias even when the current increases and can be reduced in size, weight and cost. Solution The present invention provides a choke coil including a coil (6) and a core (1) including a first core part (5) inserted into a central hole of the coil (6) and a plurality of second core parts (4) disposed along the outer periphery of the coil, the first core part (5) and the second core part (4) forming a closed magnetic path, wherein the second core parts (4) are shaped so that the total sum of the areas of cross sections thereof perpendicular to the axis of the coil is greater than the area of a cross section of the first core part (5), a gap part (G) is formed in the second core parts (4), and a ferrite magnet (7) that applies a magnetic bias is disposed in the gap part (G).Type: ApplicationFiled: February 8, 2013Publication date: February 12, 2015Inventors: Masaru Ota, Mikio Kitaoka, Yuko Kanazawa
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Patent number: 8698585Abstract: A high power inductance device enables a large ferrite magnetic core to be manufactured at low cost and with ease and improves heat radiation efficiency to reduce an increase in the temperature of the core. The inductance device has a ferrite magnetic core and a winding wire wound around the ferrite magnetic core and is mounted on a heat radiation structure through at least one of the front surfaces of the ferrite magnetic core. The ferrite magnetic core is made of a core aggregate obtained by arranging side by side a plurality of ferrite cores 10 having a completely-closed magnetic path structure or a quasi-closed magnetic path structure with a magnetic gap such that an interval is placed between the ferrite cores and magnetic paths are parallel to each other.Type: GrantFiled: September 6, 2010Date of Patent: April 15, 2014Assignee: FDK CorporationInventors: Takashi Takiguchi, Yuko Kanazawa, Mikio Kitaoka, Satoshi Ota
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Publication number: 20130321016Abstract: An electrical test probe according to an embodiment includes a probe main body portion having a connection end to a circuit of a probe base plate and made of a first metal material with resiliency, and a probe tip portion having a probe tip, made of a second metal material with higher hardness than that of the first metal material for the probe main body portion, and communicating with the probe main body portion, wherein the probe main body portion and the probe tip portion are provided with a current path made of an equal metal material extending from the probe tip to the connection end.Type: ApplicationFiled: May 9, 2013Publication date: December 5, 2013Applicant: KABUSHIKI KAISHA NIHON MICRONICSInventors: Hideki HIRAKAWA, Yuko KANAZAWA
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Publication number: 20130043969Abstract: The present invention provides a choke coil capable of applying an optimum magnetic bias without causing degradation of magnetic characteristics and any adverse effect on a neighboring device which would be caused by a temperature rise, therefore capable of adequately accommodating higher current. A choke coil according to the present invention includes a toroid coil 6 and a core 1 in which a first core 5 inserted in the center of the coil and a second core 3, 4 disposed at an outer periphery of the coil form a closed magnetic circuit. A gap G is formed in the first core 5. A magnet array applying a magnetic bias is placed in the gap G. The magnet array is formed by a plurality of submagnets 7 separated in a plane perpendicular to a direction in which a magnetic flux from the first core 5 interlinks.Type: ApplicationFiled: June 13, 2012Publication date: February 21, 2013Inventors: Masaru OTA, Yuko KANAZAWA
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Publication number: 20120169443Abstract: A high power inductance device enables a large ferrite magnetic core to be manufactured at low cost and with ease and improves heat radiation efficiency to reduce an increase in the temperature of the core. The inductance device has a ferrite magnetic core and a winding wire wound around the ferrite magnetic core and is mounted on a heat radiation structure through at least one of the front surfaces of the ferrite magnetic core. The ferrite magnetic core is made of a core aggregate obtained by arranging side by side a plurality of ferrite cores 10 having a completely-closed magnetic path structure or a quasi-closed magnetic path structure with a magnetic gap such that an interval is placed between the ferrite cores and magnetic paths are parallel to each other.Type: ApplicationFiled: September 6, 2010Publication date: July 5, 2012Inventors: Takashi Takiguchi, Yuko Kanazawa, Mikio Kitaoka, Satoshi Ota