Patents by Inventor Kenjirou Matsumoto
Kenjirou Matsumoto 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: 10180366Abstract: A torque detection device including a multipolar ring-shaped magnet fixed to a first shaft, a yoke holder configured to be fixed to a second shaft coaxially linked to the first shaft via a torsion bar and have a cylindrical portion surrounding the magnet, a pair of magnetic yokes each having a plurality of claw portions opposing the magnet and are fixed to the yoke holder, and a sensor part that detects a difference in rotational phase between the first shaft and the second shaft, wherein the pair of magnetic yokes are each provided with a plurality of swaging pieces swaged on the cylindrical portion, the swaging piece disposed at a position that overlaps in a radial direction of the cylindrical portion a specific claw portion selected from the plurality of claw portions and being formed so as to have a smaller width than a width of the claw portion.Type: GrantFiled: April 22, 2016Date of Patent: January 15, 2019Assignee: Kabushiki Kaisha Honda LockInventors: Toshihiro Yoneda, Kenjirou Matsumoto
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Publication number: 20180120175Abstract: A torque detection device including a multipolar ring-shaped magnet fixed to a first shaft, a yoke holder configured to be fixed to a second shaft coaxially linked to the first shaft via a torsion bar and have a cylindrical portion surrounding the magnet, a pair of magnetic yokes each having a plurality of claw portions opposing the magnet and are fixed to the yoke holder, and a sensor part that detects a difference in rotational phase between the first shaft and the second shaft, wherein the pair of magnetic yokes are each provided with a plurality of swaging pieces swaged on of the cylindrical portion, the swaging piece disposed at a position that overlaps in a radial direction of the cylindrical portion a specific claw portion selected from the plurality of claw portions and being formed so as to have a smaller width than a width of the claw portion.Type: ApplicationFiled: April 22, 2016Publication date: May 3, 2018Inventors: Toshihiro YONEDA, Kenjirou MATSUMOTO
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Patent number: 8607649Abstract: A torque sensor is configured so that a multi-pole permanent magnet is fixed to one of a first shaft and a second shaft linked via a torsion bar, a first rotating yoke and a second rotating yoke each having provided at equal intervals in the peripheral direction a plurality of claw portions facing the permanent magnet are fixed to the other of the first shaft and second shaft, and a magnetism detection element is disposed between a first magnetism-collecting yoke and a second magnetism-collecting yoke individually facing the first and second rotating yokes. The first and second rotating yokes are formed into identical shapes, and the claw portions provided respectively on the rotating yokes are alternatingly disposed in the peripheral direction within the same plane perpendicular to the axes of the first shaft and second shaft. Accordingly, it is possible to reduce a cost by having fewer types of parts.Type: GrantFiled: March 2, 2010Date of Patent: December 17, 2013Assignee: Kabushiki Kaisha Honda LockInventor: Kenjirou Matsumoto
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Publication number: 20100257947Abstract: A torque sensor is configured so that a multi-pole permanent magnet is fixed to one of a first shaft and a second shaft linked via a torsion bar, a first rotating yoke and a second rotating yoke each having provided at equal intervals in the peripheral direction a plurality of claw portions facing the permanent magnet are fixed to the other of the first shaft and second shaft, and a magnetism detection element is disposed between a first magnetism-collecting yoke and a second magnetism-collecting yoke individually facing the first and second rotating yokes. The first and second rotating yokes are formed into identical shapes, and the claw portions provided respectively on the rotating yokes are alternatingly disposed in the peripheral direction within the same plane perpendicular to the axes of the first shaft and second shaft. Accordingly, it is possible to reduce a cost by having fewer types of parts.Type: ApplicationFiled: March 2, 2010Publication date: October 14, 2010Applicant: KABUSHIKI KAISHA HONDA LOCKInventor: Kenjirou MATSUMOTO
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Patent number: 7170410Abstract: A sensor device includes: a housing; a sensor element embedded in the tip end of the housing, the sensor element having on one side face thereof a magnetically sensitive surface that faces a side of the housing and having a pair of terminal plates extending from a side face that is opposite to the magnetically sensitive surface; and a cord electrically connected to the two terminal plates and extending from a rear part of the housing. The housing is die-molded so as to embed therein a holder formed as a single member from a synthetic resin, the sensor element which is held by the holder in a state in which the two terminal plates are formed so as to have a bent portion bent in a substantially U-shaped form and connected to the sensor element and a flat plate portion extending along a plane intersecting the sensor element and connected to the bent portion, and part of the cord which is electrically connected to the flat plate portion of the two terminal plates.Type: GrantFiled: January 25, 2005Date of Patent: January 30, 2007Assignee: Kabushiki Kaisha Honda LockInventors: Kenjirou Matsumoto, Hiroshi Watanabe
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Publication number: 20050179557Abstract: A sensor device includes: a housing; a sensor element embedded in the tip end of the housing, the sensor element having on one side face thereof a magnetically sensitive surface that faces a side of the housing and having a pair of terminal plates extending from a side face that is opposite to the magnetically sensitive surface; and a cord electrically connected to the two terminal plates and extending from a rear part of the housing. The housing is die-molded so as to embed therein a holder formed as a single member from a synthetic resin, the sensor element which is held by the holder in a state in which the two terminal plates are formed so as to have a bent portion bent in a substantially U-shaped form and connected to the sensor element and a flat plate portion extending along a plane intersecting the sensor element and connected to the bent portion, and part of the cord which is electrically connected to the flat plate portion of the two terminal plates.Type: ApplicationFiled: January 25, 2005Publication date: August 18, 2005Applicant: Kabushiki Kaisha Honda LockInventors: Kenjirou Matsumoto, Hiroshi Watanabe