Patents by Inventor Yasunori Matsukawa
Yasunori Matsukawa 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: 7836774Abstract: It is aimed to provide a strain detector having a fewer number of mounting parts and high operation efficiency and usability. The strain detector is provided with a cylindrical strain generator to be strained upon receiving a load, a resistor element which is arranged on the outer circumferential surface of the strain generator and whose resistance varies depending on the amount of strain, a signal processing circuit connected with the resistor element and screw portions arranged above and below the strain generator to sandwich the strain generator. The strain generator and the screw portions are integrated.Type: GrantFiled: May 17, 2006Date of Patent: November 23, 2010Assignee: Panasonic CorporationInventors: Takaaki Ogawa, Yasunobu Kobayashi, Yasunori Matsukawa, Toshirou Otobe, Katsuhiko Omoto, Noriyuki Jitousho, Akira Matsuura
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Patent number: 7658118Abstract: A strain detector includes a bridge circuit having at least two strain resistance elements, a substrate, a first fixed member, and a second fixed member. The substrate has a circuit portion electrically connected to the strain resistance elements. The strain resistance elements are arranged on the substrate. The first fixed member is fixed to a center of an area, where an outer periphery of the area is set at a position at which the strain resistance elements are arranged. The second fixed member is fixed outside the position, where the strain resistance elements are arranged at the substrate. A center of an axis of the first fixed member, a center of an axis of the second fixed member, and the center of the area are positioned on a straight line, and the first fixed member and the second fixed member are arranged on two mutually opposed surfaces of the substrate.Type: GrantFiled: September 30, 2005Date of Patent: February 9, 2010Assignee: Panasonic CorporationInventors: Sigehiro Yosiuti, Shusaku Kawasaki, Hiroaki Mori, Yasunori Matsukawa, Yasunobu Kobayashi
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Patent number: 7520175Abstract: A fixing member is composed of an upper washer and a lower washer; and a sensor substrate is sandwiched and held by the upper and lower washers. A strain-detecting element is disposed on the sensor substrate. A strain sensor as configured above is fixed onto a measurement target via the fixing member. Accordingly, the strain sensor does not generate an output signal when no external force is applied, demonstrating stable characteristics.Type: GrantFiled: February 23, 2004Date of Patent: April 21, 2009Assignee: Panasonic CorporationInventors: Yasunori Matsukawa, Toshiharu Motofusa, Yasunobu Kobayashi, Akira Matsuura
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Publication number: 20090049930Abstract: It is aimed to provide a strain detector having a fewer number of mounting parts and high operation efficiency and usability. The strain detector is provided with a cylindrical strain generator to be strained upon receiving a load, a resistor element which is arranged on the outer circumferential surface of the strain generator and whose resistance varies depending on the amount of strain, a signal processing circuit connected with the resistor element and screw portions arranged above and below the strain generator to sandwich the strain generator. The strain generator and the screw portions are integrated.Type: ApplicationFiled: May 17, 2006Publication date: February 26, 2009Inventors: Takaaki Ogawa, Yasunobu Kobayashi, Yasunori Matsukawa, Toshirou Otobe, Katsuhiko Omoto, Noriyuki Jitousho, Akira Matsuura
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Publication number: 20080245157Abstract: A strain detector includes a bridge circuit having at least two strain resistance elements, a substrate, a first fixed member, and a second fixed member. The substrate has a circuit portion electrically connected to the strain resistance elements. The strain resistance elements are arranged on the substrate. The first fixed member is fixed to a center of an area, where an outer periphery of the area is set at a position at which the strain resistance elements are arranged. The second fixed member is fixed outside the position, where the strain resistance elements are arranged at the substrate. A center of an axis of the first fixed member, a center of an axis of the second fixed member, and the center of the area are positioned on a straight line, and the first fixed member and the second fixed member are arranged on two mutually opposed surfaces of the substrate.Type: ApplicationFiled: September 30, 2005Publication date: October 9, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Sigehiro Yosiuti, Shusaku Kawasaki, Hiroaki Mori, Yasunori Matsukawa, Yasunobu Kobayashi
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Publication number: 20080229841Abstract: A fixing member is composed of an upper washer and a lower washer; and a sensor substrate is sandwiched and held with these upper and lower washers. A strain-detecting element is disposed on the sensor substrate. A strain sensor as configured above is fixed onto a measurement target via the fixing member. Accordingly, the strain sensor does not generate an output signal when no external force is applied, demonstrating stable characteristics.Type: ApplicationFiled: February 23, 2004Publication date: September 25, 2008Inventors: Yasunori Matsukawa, Toshiharu Motofusa, Yasunobu Kobayashi, Akira Matsuura
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Patent number: 7377178Abstract: The present invention provides a strain detector improved in output characteristic, in which no internal stress is generated in strain resistance elements even with it fixed on a fixing member. The strain detector is configured in that a detection hole is provided nearly at the center of a insulating substrate, a fixing hole is formed at the position of peripheral end, a portion around the detection hole is pressed by a pressing member, one holding member and the other holding member are provided with fixing holes opposing to the fixing holes of the insulating substrate, and the peripheral end of the insulating substrate is fixed by the fixing member inserted. Accordingly, the detection hole in the insulating substrate is peripherally displaceable in a vertical direction with respect to one holding member and the other holding member.Type: GrantFiled: September 8, 2004Date of Patent: May 27, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasunobu Kobayashi, Shigehiro Yoshiuchi, Yasunori Matsukawa, Hiroaki Mouri, Kazuhiko Miyagoshi
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Publication number: 20070084294Abstract: The present invention provides a strain detector improved in output characteristic, in which no internal stress is generated in strain resistance elements even with it fixed on a fixing member. The strain detector is configured in that a detection hole is provided nearly at the center of a insulating substrate, a fixing hole is formed at the position of peripheral end, a portion around the detection hole is pressed by a pressing member, one holding member and the other holding member are provided with fixing holes opposing to the fixing holes of the insulating substrate, and the peripheral end of the insulating substrate is fixed by the fixing. member inserted. Accordingly, the detection hole in the insulating substrate is peripherally displaceable in vertical direction with respect to one holding member and the other holding member.Type: ApplicationFiled: September 8, 2004Publication date: April 19, 2007Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yasunobu Kobayashi, Shigehiro Yoshiuchi, Yasunori Matsukawa, Hiroaki Mouri, Kazuhiko Miyagoshi
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Patent number: 7155981Abstract: A strain sensor improved in detection accuracy without variation of bending stresses applied to the strain detecting element. The sensor substrate has a first fixing hole at one end and a second fixing hole at the other end, a detecting hole at the center, and at least one strain detecting element on the upper surface or lower surface thereof. The first fixing member is press-fitted into the first fixing hole. The second fixing member is press-fitted into the second fixing hole. The detecting member is press-fitted into the detecting hole. Further, when an external force is applied to the detecting member, strain generated due to the positional shift of the detecting member is detected by the strain detecting element with respect to the first fixing member and the second fixing member.Type: GrantFiled: September 12, 2002Date of Patent: January 2, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akira Matsuura, Shinjiro Ueda, Toshiro Otobe, Yasunobu Kobayashi, Katsuhiko Omoto, Yasunori Matsukawa, Toshiharu Motofusa
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Patent number: 7042210Abstract: A non-contact position sensor includes a plurality of magnets, at least one magnetic sensor element, and an object to be detected. The plurality of magnets form a magnetic circuit which includes a U-shaped first magnetic body, a U-shaped second magnetic body, and the plurality of magnets. The plurality of magnets are disposed between the two U-shaped magnetic bodies. The magnetic sensor element is held by the two U-shaped magnetic bodies.Type: GrantFiled: December 14, 2000Date of Patent: May 9, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasunori Matsukawa, Akira Matsuura, Shinjiro Ueda
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Patent number: 7012422Abstract: A non-contact type position sensor enhanced in characteristics. A first magnetic element has a first magnetic detecting part at one end side thereof. A first magnet has one pole thereof fixed to the other side of the first magnetic element. A second magnetic element is positioned underneath the first magnetic element, and has a second magnetic detecting part at one end side thereof, and has the other pole of the first magnet at the other end side thereof. A third magnetic element is positioned substantially on circles concentric with the first magnetic element, and has a third magnetic detecting part at the one end side thereof. A second magnet has one pole fixed to the other end side of the third magnetic element. A fourth magnetic element is positioned underneath the third magnetic element, and has a fourth magnetic detecting part at one end side thereof, and also has the other pole of the second magnet at the other end side thereof.Type: GrantFiled: June 18, 2002Date of Patent: March 14, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akira Matsuura, Yasunori Matsukawa, Shinjiro Ueda
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Publication number: 20050034528Abstract: A strain sensor improved in detection accuracy without variation of bending stresses applied to the strain detecting element. The sensor substrate has a first fixing hole at one end and a second fixing hole at the other end, a detecting hole at the center, and at least one strain detecting element on the upper surface or lower surfce thereof. The first fixing member is press-fitted into the first fixing hole. The second fixing member is press-fitted into the second fixing hole. The detecting member is press-fitted into the detecting hole. Further, when an external force is applied to the detecting member, strain generated due to the positional shift of the detecting member is detected by the strain detecting element with respect to the first fixing member and the second fixing member.Type: ApplicationFiled: September 12, 2002Publication date: February 17, 2005Inventors: Akira Matsuura, Shinjiro Ueda, Toshiro Otobe, Yasunobu Kobayashi, Katsuhiko Omoto, Yasunori Matsukawa, Toshiharu Motofusa
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Publication number: 20040155648Abstract: A non-contact type position sensor enhanced in characteristics. A first magnetic element has a first magnetic detecting part at one end side thereof. A first magnet has one pole thereof fixed to the other side of the first magnetic element. A second magnetic element is positioned underneath the first magnetic element, and has a second magnetic detecting part at one end side thereof, and has the other pole of the first magnet at the other end side thereof. A third magnetic element is positioned substantially on circles concentric with the first magnetic element, and has a third magnetic detecting part at the one end side thereof. A second magnet has one pole fixed to the other end side of the third magnetic element. A fourth magnetic element is positioned underneath the third magnetic element, and has a fourth magnetic detecting part at one end side thereof, and also has the other pole of the second magnet at the other end side thereof.Type: ApplicationFiled: April 6, 2004Publication date: August 12, 2004Inventors: Akira Matsuura, Yasunori Matsukawa, Shinijiro Ueda
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Patent number: 6690158Abstract: A position sensor includes a shaft to be detected, a first magnet being fixed to the shaft and having a first polarity vector parallel to an axis of the shaft, a second magnet being disposed opposite to the first magnet and having a second polarity vector crossing the first polarity vector substantially orthogonally three-dimensionally, and first and second semiconductor magnetoresistive elements being disposed over the second magnet and functioning as a magnetoelectric transducer having a magnetosensitive axis substantially orthogonal to the first and second polarity vectors. The first and second elements generate an output responsive to an axial movement of the shaft.Type: GrantFiled: August 27, 2002Date of Patent: February 10, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kiyoshi Saito, Shinjiro Ueda, Akira Matsuura, Yasunori Matsukawa, Noriyuki Jitosho
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Publication number: 20030030958Abstract: The present invention provides an accurate, non-contacting position sensor for an electromagnetic actuator. This position sensor includes a shaft to be detected (1), a first magnet (2) being fixed to the shaft (1) and having a first polarity vector (2a) parallel to an axis of the shaft (1), a second magnet (3) being disposed opposite to the first magnet (2) and having a second polarity vector (3a) crossing the first polarity vector (2a) substantially orthogonally three-dimensionally, and first and second semiconductor magnetoresistive elements (5a, 5b) being disposed over the second magnet (3) and functioning as a magnetoelectric transducer having a magnetosensitive axis substantially orthogonal to the first and second polarity vectors (2a, 3a). The first and second elements (5a,5b) generates an output responsive to an axial movement of the shaft (1).Type: ApplicationFiled: August 27, 2002Publication date: February 13, 2003Inventors: Kiyoshi Saito, Shinjiro Ueda, Akira Matsuura, Yasunori Matsukawa, Noriyuki Jitosho
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Publication number: 20020135360Abstract: A non-contact position sensor of this invention comprises a magnetic circuit having at least one magnet and a magnetically continuous magnetic body, at least one magnetic sensor element disposed to the magnetic circuit, and an object to be detected positioned in the magnetic circuit. The non-contact position sensor of this invention detects a change in output of the magnetic sensor element caused by rotation or movement of the object to be detected disposed in the magnetic circuit, to measure a position of the object to be detected.Type: ApplicationFiled: May 1, 2002Publication date: September 26, 2002Inventors: Yasunori Matsukawa, Akira Matsuura, Shinjiro Ueda