Patents by Inventor Shigetoshi Fukaya
Shigetoshi Fukaya 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: 20090146650Abstract: A driving gear, which is a scissors gear, fixed to a rotating body, engages with a driven gear, and the driven gear engages with a fixed screw receiver. A first gear and a second gear of the driving gear elastically bias the tooth of the driven gear by a coil spring in the direction of an inner side of a diameter; consequently the driven gear 5 is forced on the screw receiver. Gears formed in the tooth tips of the driven gear engage with a partial spiral screw of the screw receiver.Type: ApplicationFiled: December 10, 2008Publication date: June 11, 2009Applicants: NIPPON SOKEN, INC., DENSO CORPORATIONInventors: Shinji Hatanaka, Kenji Takeda, Shigetoshi Fukaya, Naoki Nakane
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Publication number: 20080284421Abstract: A rotation angle detecting device includes a signal generator, a magnetic rotor and a rotation angle calculating unit that calculates a rotation angle ? of the rotor based on the output signals of the signal generator. The signal generator includes a magnetic rotor that has a permanent magnet and a shaft connectable with the rotating object and at least three magnetic sensor elements disposed in the magnetic field to generate a plurality of output signals when the rotor rotates.Type: ApplicationFiled: April 1, 2008Publication date: November 20, 2008Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Shinji Hatanaka, Kenji Takeda, Shigetoshi Fukaya
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Patent number: 7420363Abstract: A rotation angle of a shaft is detected based on changes in levels of magnetic flux from a single magnet that is mounted on the shaft and is moved axially in accordance with rotation of the shaft. Respective detected variations in level of X-direction and Y-direction magnetic flux components (each at right angles to the shaft axis) are used to obtain a first quantity that varies monotonically, and a second quantity that varies periodically, in accordance with increased rotation angle. An accurate value of the shaft rotation angle is calculated based on the first and second quantities, in combination.Type: GrantFiled: May 3, 2007Date of Patent: September 2, 2008Assignee: Denso CorporationInventors: Shinji Hatanaka, Kenji Takeda, Shigetoshi Fukaya
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Publication number: 20070268015Abstract: A rotation angle of a shaft is detected based on changes in levels of magnetic flux from a single magnet that is mounted on the shaft and is moved axially in accordance with rotation of the shaft. Respective detected variations in level of X-direction and Y-direction magnetic flux components (each at right angles to the shaft axis) are used to obtain a first quantity that varies monotonically, and a second quantity that varies periodically, in accordance with increased rotation angle. An accurate value of the shaft rotation angle is calculated based on the first and second quantities, in combination.Type: ApplicationFiled: May 3, 2007Publication date: November 22, 2007Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Shinji Hatanaka, Kenji Takeda, Shigetoshi Fukaya
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Patent number: 7298395Abstract: An angular position sensor is provided which is designed to an angular position of a rotary shaft. The angular position sensor has a magnet affixed to the rotary shaft. The magnet has an N-pole and an S-pole and is so geometrically shaped as to produce magnetic flux which is substantially uniform in amount within a range extending around each of centers of the N-pole and the S-pole. This improves the linearity of a change in sensor output upon rotation of the rotary shaft.Type: GrantFiled: January 13, 2004Date of Patent: November 20, 2007Assignees: DENSO CORPORATION, Nippon Soken, Inc.Inventors: Shigetoshi Fukaya, Kenji Takeda, Naoki Nakane, Tetsuo Imamura
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Patent number: 7285952Abstract: A rotation angle detecting device is rotated by a rotating object via a gear mechanism to detect a rotation angle of the rotating object. The rotation angle detecting device includes a housing, a magnet rotor unit having a permanent magnet and a central hole, a magnetic sensor unit including a pair of magnetic sensor elements each of which detects magnetic flux density of a magnetic field generated by the permanent magnet in a direction different from the other, and a signal processor that calculates a rotation angle of the rotating object from the magnetic flux density. The magnetic rotor unit includes a mechanism for changing the magnetic flux density as the number of turns of the magnet rotor unit changes.Type: GrantFiled: February 16, 2007Date of Patent: October 23, 2007Assignees: DENSO CORPORATION, Nippon Soken, Inc.Inventors: Shinji Hatanaka, Kenji Takeda, Shigetoshi Fukaya
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Publication number: 20070194786Abstract: A rotation angle detecting device is rotated by a rotating object via a gear mechanism to detect a rotation angle of the rotating object. The rotation angle detecting device includes a housing, a magnet rotor unit having a permanent magnet and a central hole, a magnetic sensor unit including a pair of magnetic sensor elements each of which detects magnetic flux density of a magnetic field generated by the permanent magnet in a direction different from the other, and a signal processor that calculates a rotation angle of the rotating object from the magnetic flux density. The magnetic rotor unit includes a mechanism for changing the magnetic flux density as the number of turns of the magnet rotor unit changes.Type: ApplicationFiled: February 16, 2007Publication date: August 23, 2007Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Shinji Hatanaka, Kenji Takeda, Shigetoshi Fukaya
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Patent number: 7246531Abstract: A first shaft and a second shaft are connected coaxially. A torsion bar converts a torque applied between two shafts into a torsion displacement. A multipolar magnet is fixed to the first shaft. One set of magnetic yokes is fixed to the second shaft and disposed in a magnetic field generated by the multipolar magnet. The magnetic yokes are opposed to each other via an air gap in an axial direction. A magnetic sensor is provided for detecting the density of magnetic flux generated in the air gap. A non-magnetic spacer is disposed between the magnetic yokes as a means for positioning the magnetic yokes. The spacer and the magnetic yokes are integrated by resin molding.Type: GrantFiled: July 7, 2005Date of Patent: July 24, 2007Assignees: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Naoki Nakane, Shigetoshi Fukaya
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Patent number: 7227353Abstract: An angular position determining apparatus is provided which includes a magnet affixed to a rotary shaft and a plurality of magnetic sensor elements and works to determine an angular position of the rotary shaft using outputs of the magnetic sensor elements. The apparatus also includes a malfunction detector which specifies which of the magnetic sensor elements is now malfunctioning and takes an action required to determine the angular position of the rotary shaft correctly in the event of such a malfunction.Type: GrantFiled: August 26, 2004Date of Patent: June 5, 2007Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Shigetoshi Fukaya, Yoko Ichikawa, Naoki Nakane
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Patent number: 7191669Abstract: A torque sensor is provided which consists of a magnet, an assembly of magnetic rings, and a magnetic sensor. The magnetic rings have claws arrayed thereround at regular intervals. Each of the claws of one of the rings is interposed between adjacent two of the claws of the other ring. Upon input of torque, the magnet is rotated relative to the ring assembly, thereby causing the density of magnetic flux to change as a function of the torque which is sensed by the magnetic sensor. Each of the claws is geometrically shaped so as to increase the density of magnetic flux flowing through the ring assembly, thereby improving the sensitivity of the sensor.Type: GrantFiled: February 8, 2005Date of Patent: March 20, 2007Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Naoki Nakane, Shigetoshi Fukaya
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Patent number: 7154262Abstract: A rotation angle detecting device includes a columnar permanent magnet that has a generally ring-shaped cross-section and a pair of magnetic poles, a pair of semi-cylindrical yokes disposed in a circumferential direction opposite the permanent magnet, a rotary shaft fixed to the permanent magnet at a shifted rotation axis and a magnetic sensor disposed in one of circumferential gaps between the yokes. The rotation axis and the magnetic poles are arranged so that the magnetic flux density becomes maximum at portions of the yoke less than 90 degrees angled from the circumferential gap in which the magnetic sensor is disposed.Type: GrantFiled: January 28, 2005Date of Patent: December 26, 2006Assignee: Denso CorporationInventors: Tsutomu Kamizono, Koji Wato, Masahiro Taguchi, Shinji Ando, Shigetoshi Fukaya, Kenji Takeda
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Patent number: 7110902Abstract: A torsion bar type torque sensor system is provided with the following: an elastic member that receives a torque and converts the torque to a torsion displacement; a multipolar ring magnet in which N poles and S poles are circumferentially and alternately magnetized; a pair of magnetic yoke halves disposed coaxially with the ring magnet; and a magnetometric sensor that detects magnetic flux generated between the pair of the magnetic yoke halves. The magnetometric sensor is made of a semiconductor that integrates a semiconductor magnetometric sensor, a non-volatile memory, a computation circuit, and an output circuit. This structure provides a torque sensor system that has an excellent maintainability.Type: GrantFiled: December 16, 2004Date of Patent: September 19, 2006Assignees: Nippon Soken, Inc., Denso CorporationInventors: Shigetoshi Fukaya, Kenji Takeda, Naoki Nakane, Kiyoshi Sugimura
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Patent number: 7089809Abstract: A torque sensor has a torsion bar coaxially in alignment with input and output shafts, a ring shaped magnet fixed to an axial end of the input shaft, a pair of magnetic yokes fixed to an axial end of the output shaft, and a magnetic sensor for detecting magnetic flux density generated between the pair of magnetic yokes. Each of the magnetic yokes is provided with claws, which are circumferentially spaced at constant intervals, and whose number is equal to that of each of N and S poles alternately arranged circumferentially in the magnet. Each, center of the claws coincides with a boundary between immediately adjacent N and S poles of the magnet, when the torsion bar is not twisted. The magnetic sensor is inserted into an axial gap between the pair of magnetic yokes without contacting the magnetic yokes.Type: GrantFiled: February 23, 2006Date of Patent: August 15, 2006Assignees: Nippon Soken, Inc., Denso CorporationInventors: Naoki Nakane, Kiyoshi Sugimura, Shigetoshi Fukaya, Masao Tokunaga, Kenji Takeda
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Publication number: 20060137474Abstract: A torque sensor has a torsion bar coaxially in alignment with input and output shafts, a ring shaped magnet fixed to an axial end of the input shaft, a pair of magnetic yokes fixed to an axial end of the output shaft, and a magnetic sensor for detecting magnetic flux density generated between the pair of magnetic yokes. Each of the magnetic yokes is provided with claws, which are circumferentially spaced at constant intervals, and whose number is equal to that of each of N and S poles alternately arranged circumferentially in the magnet. Each, center of the claws coincides with a boundary between immediately adjacent N and S poles of the magnet, when the torsion bar is not twisted. The magnetic sensor is inserted into an axial gap between the pair of magnetic yokes without contacting the magnetic yokes.Type: ApplicationFiled: February 23, 2006Publication date: June 29, 2006Inventors: Naoki Nakane, Kiyoshi Sugimura, Shigetoshi Fukaya, Masao Tokunaga, Kenji Takeda
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Patent number: 7051602Abstract: A first shaft and a second shaft are connected coaxially. A torsion bar converts a torque applied between two shafts into a torsion displacement. A multipolar magnet is fixed to the first shaft. One set of magnetic yokes is fixed to the second shaft and disposed in a magnetic field generated by the multipolar magnet. One set of flux collecting rings is disposed along an outer surface of the set of magnetic yokes and opposed to each other via an air gap in an axial direction. A magnetic sensor is provided for detecting the density of magnetic flux generated in the air gap. An outer cylindrical surface of the set of flux collecting rings is surrounded by a magnetic shield.Type: GrantFiled: July 7, 2005Date of Patent: May 30, 2006Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Naoki Nakane, Shigetoshi Fukaya
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Patent number: 7047824Abstract: A torque sensor has a torsion bar coaxially in alignment with input and output shafts, a ring shaped magnet fixed to an axial end of the input shaft, a pair of magnetic yokes fixed to an axial end of the output shaft, and a magnetic sensor for detecting magnetic flux density generated between the pair of magnetic yokes. Each of the magnetic yokes is provided with claws, which are circumferentially spaced at constant intervals, and whose number is equal to that of each of N and S poles alternately arranged circumferentially in the magnet. Each center of the claws coincides with a boundary between immediately adjacent N and S poles of the magnet, when the torsion bar is not twisted. The magnetic sensor is inserted into an axial gap between the pair of magnetic yokes without contacting the magnetic yokes.Type: GrantFiled: June 9, 2003Date of Patent: May 23, 2006Assignees: Nippon Soken, Inc., Denso CorporationInventors: Naoki Nakane, Kiyoshi Sugimura, Shigetoshi Fukaya, Masao Tokunaga, Kenji Takeda
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Patent number: 6988422Abstract: A pair of magnetic flux collecting rings and a magnetic sensor are integrally covered by a molded resin to form a sub unit of a torque sensor. The pair of rings and sensors are integrated and are in contact with each other, i.e., the magnetic sensor is held in between respective magnetic flux collecting portions of the rings without any air gap formed therebetween. Magnetic flux collected by the rings can be detected by the magnetic sensor to a maximum degree, whereby the signal output of the magnetic sensor is enhanced and made stable.Type: GrantFiled: January 27, 2005Date of Patent: January 24, 2006Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Kiyoshi Sugimura, Naoki Nakane, Shigetoshi Fukaya, Kenji Takeda
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Publication number: 20050247139Abstract: A pair of magnetic flux collecting rings and a magnetic sensor are integrally covered by a molded resin to form a sub unit of a torque sensor. The pair of rings and sensors are integrated and are in contact with each other, i.e., the magnetic sensor is held in between respective magnetic flux collecting portions of the rings without any air gap formed therebetween. Magnetic flux collected by the rings can be detected by the magnetic sensor to a maximum degree, whereby the signal output of the magnetic sensor is enhanced and made stable.Type: ApplicationFiled: July 19, 2005Publication date: November 10, 2005Inventors: Kiyoshi Sugimura, Naoki Nakane, Shigetoshi Fukaya, Kenji Takeda
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Publication number: 20050247138Abstract: A first shaft and a second shaft are connected coaxially. A torsion bar converts a torque applied between two shafts into a torsion displacement. A multipolar magnet is fixed to the first shaft. One set of magnetic yokes is fixed to the second shaft and disposed in a magnetic field generated by the multipolar magnet. The magnetic yokes are opposed to each other via an air gap in an axial direction. A magnetic sensor is provided for detecting the density of magnetic flux generated in the air gap. A non-magnetic spacer is disposed between the magnetic yokes as a means for positioning the magnetic yokes. The spacer and the magnetic yokes are integrated by resin molding.Type: ApplicationFiled: July 7, 2005Publication date: November 10, 2005Inventors: Naoki Nakane, Shigetoshi Fukaya
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Publication number: 20050241414Abstract: A first shaft and a second shaft are connected coaxially. A torsion bar converts a torque applied between two shafts into a torsion displacement. A multipolar magnet is fixed to the first shaft. One set of magnetic yokes is fixed to the second shaft and disposed in a magnetic field generated by the multipolar magnet. One set of flux collecting rings is disposed along an outer surface of the set of magnetic yokes and opposed to each other via an air gap in an axial direction. A magnetic sensor is provided for detecting the density of magnetic flux generated in the air gap. An outer cylindrical surface of the set of flux collecting rings is surrounded by a magnetic shield.Type: ApplicationFiled: July 7, 2005Publication date: November 3, 2005Inventors: Naoki Nakane, Shigetoshi Fukaya