Patents by Inventor Atsutoshi Goto
Atsutoshi Goto 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: 10933770Abstract: A power seat device is configured to acquire a target associated position of a tilted position, corresponding to a current position of a seatback for allowing the seatback to reach an end position in a reclining range, and a seat to reach an end position in a tilting range simultaneously. Outputs of a reclining motor and a tilting motor are adjusted so that the tilted position coincides with the acquired target associated position.Type: GrantFiled: September 20, 2019Date of Patent: March 2, 2021Assignees: IMASEN ELECTRIC INDUSTRIAL CO., LTD., NHK SPRING CO., LTD.Inventors: Atsutoshi Goto, Hiroyuki Kojima, Takanari Matsumoto, Kenichi Katsube, Daisuke Tanaka
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Publication number: 20200156506Abstract: A power seat device is configured to acquire a target associated position of a tilted position, corresponding to a current position of a seatback for allowing the seatback to reach an end position in a reclining range, and a seat to reach an end position in a tilting range simultaneously. Outputs of a reclining motor and a tilting motor are adjusted so that the tilted position coincides with the acquired target associated position.Type: ApplicationFiled: September 20, 2019Publication date: May 21, 2020Inventors: Atsutoshi GOTO, Hiroyuki KOJIMA, Takanari MATSUMOTO, Kenichi KATSUBE, Daisuke TANAKA
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Patent number: 9810550Abstract: In a position detection device of a type that omits a secondary coil, various inconveniences arising from the use of a voltage-dividing resistance (fixed resistor) are eliminated. At least two pairs of coils are provided. A magnetism-responsive member are placed so as to effect relative displacement in relation to the coils, the relative position of the member in relation to the coils varies with a position of a detection object, and impedance of each coil is varied with the relative position. The impedance changes of two coils constituting each one of coil pairs present characteristics of mutually opposite phase characteristics. For each coil pair, the two coils constituting the pair are connected in series with each other, and from a connection point thereof, a voltage-divided output voltage according to the impedance of the two coils is taken out as a detection output signal for the pair.Type: GrantFiled: May 13, 2013Date of Patent: November 7, 2017Assignee: AMITEQ CO., LTD.Inventors: Atsutoshi Goto, Daisuke Goto, Kazuya Sakamoto, Shuichi Tanaka
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Patent number: 9683829Abstract: A detection coil incorporated in a self-oscillation circuit, which includes the coil and a capacitor and is set to a high frequency band (e.g., around 1 MHz or higher). A target section has a relative position to the coil section that varies in response to displacement of a detection object and includes a magnetism-responsive member constructed to cause inductance of the coil to vary with the relative position. A rectifier circuit extracts an amplitude level of an oscillation output signal of the self-oscillation circuit and outputs the extracted level as detected position data. For example, a plurality of self-oscillation circuits are provided. Alternatively, a single self-oscillation circuit forms a plurality of series circuits by, for each coil pair, connecting in series the two coils of the coil pair, and connecting the series circuits in parallel as an inductor element for self-oscillation.Type: GrantFiled: December 13, 2012Date of Patent: June 20, 2017Assignee: AMITEQ CO., LTD.Inventors: Atsutoshi Goto, Daisuke Goto, Kazuya Sakamoto, Hiroshi Sakamoto, Yasuhiro Yuasa
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Publication number: 20150130444Abstract: In a position detection device of a type that omits a secondary coil, various inconveniences arising from the use of a voltage-dividing resistance (fixed resistor) are eliminated. At least two pairs of coils are provided. A magnetism-responsive member are placed so as to effect relative displacement in relation to the coils, the relative position of the member in relation to the coils varies with a position of a detection object, and impedance of each coil is varied with the relative position. The impedance changes of two coils constituting each one of coil pairs present characteristics of mutually opposite phase characteristics. For each coil pair, the two coils constituting the pair are connected in series with each other, and from a connection point thereof, a voltage-divided output voltage according to the impedance of the two coils is taken out as a detection output signal for the pair.Type: ApplicationFiled: May 13, 2013Publication date: May 14, 2015Inventors: Atsutoshi Goto, Daisuke Goto, Kazuya Sakamoto, Shuichi Tanaka
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Publication number: 20140347075Abstract: A detection coil is incorporated in a self-oscillation circuit. The oscillation frequency of the self-oscillation circuit, which comprises the coil and a capacitor, is set to a high frequency band (e.g., around 1 MHz or higher). A target section whose relative position to the coil section varies in response to displacement of a detection object, and includes a magnetism-responsive member constructed to cause inductance of the coil to vary with the relative position. A rectifier circuit extracts an amplitude level of an oscillation output signal of the self-oscillation circuit and outputs the extracted level as detected position data. For example, a plurality of self-oscillation circuits are provided. Alternatively, a single self-oscillation circuit forms a plurality of series circuits by, for each coil pair, connecting in series the two coils of the coil pair, and includes the result of connecting the series circuits in parallel as an inductor element for self-oscillation.Type: ApplicationFiled: December 13, 2012Publication date: November 27, 2014Inventors: Atsutoshi Goto, Daisuke Goto, Kazuya Sakamoto, Hiroshi Sakamoto, Yasuhiro Yuasa
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Patent number: 8677835Abstract: An excitation AC signal biased by a predetermined DC voltage is applied to a coil to allow a DC voltage component in a coil output signal to contain failure information about disconnection, partial disconnection, or the like of the coil. The DC voltage component contained in the coil output signal is detected, and the detected DC voltage is provided as an offset voltage for a failure diagnosis. Further, to check a peak level of the excitation AC voltage, a DC voltage corresponding to the peak level may be contained in the offset voltage. A differential amplifier circuit for obtaining a difference between a coil detection output AC voltage component and a reference AC voltage component outputs an obtained differential signal offset by the offset voltage. Accordingly, the differential signal containing the offset voltage as the failure information is transmitted to a circuit for torque measurement as a torque detection signal via a single output line.Type: GrantFiled: April 16, 2010Date of Patent: March 25, 2014Assignee: Amiteq Co., Ltd.Inventors: Atsutoshi Goto, Yasuhiro Yuasa, Hiroshi Sakamoto, Daisuke Goto
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Publication number: 20120031202Abstract: An excitation AC signal biased by a predetermined DC voltage is applied to a coil to allow a DC voltage component in a coil output signal to contain failure information about disconnection, partial disconnection, or the like of the coil. The DC voltage component contained in the coil output signal is detected, and the detected DC voltage is provided as an offset voltage for a failure diagnosis. Further, to check a peak level of the excitation AC voltage, a DC voltage corresponding to the peak level may be contained in the offset voltage. A differential amplifier circuit for obtaining a difference between a coil detection output AC voltage component and a reference AC voltage component outputs an obtained differential signal offset by the offset voltage. Accordingly, the differential signal containing the offset voltage as the failure information is transmitted to a circuit for torque measurement as a torque detection signal via a single output line.Type: ApplicationFiled: April 16, 2010Publication date: February 9, 2012Applicant: AMITEQ CO., LTD.Inventors: Atsutoshi Goto, Yasuhiro Yuasa, Hiroshi Sakamoto, Daisuke Goto
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Patent number: 7986139Abstract: A plurality of layers of flat coils are stacked and connected in series with each other to form a single coil pole, and the coil pole is energized by an A.C. signal. Magnetism-responsive member, provided to be opposed to the coil pole in a non-contact manner, is displaced relative to the coil pole, so that correspondency, to the coil section, of the magnetism-responsive member varies in response to variation in the relative position and thus impedance variation occurs in the coil pole. Position detection signal is provided on the basis of an output signal, responsive to the impedance variation, taken out from the coil pole.Type: GrantFiled: June 23, 2006Date of Patent: July 26, 2011Assignee: Amiteq Co., Ltd.Inventor: Atsutoshi Goto
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Patent number: 7800359Abstract: A first sensor detects a rotational position of a first shaft in a noncontact fashion and generates a first output signal by phase-shifting a reference A.C. signal in accordance with the detected rotational position of the first shaft. A second sensor detects a rotational position of a second shaft in a noncontact fashion and generates a second output signal by phase-shifting the reference A.C. signal in accordance with the detected rotational position of the second shaft. First and second timing signals corresponding to phase shift amounts of the first and second output signals are output via respective output lines. Relative rotational position detection data, representing a rotational difference or amount of torsion between the two shafts, appears in a time difference between the first and second timing signals. A PWM signal, having a pulse width corresponding to a time difference between the first and second timing signals, may be output.Type: GrantFiled: November 19, 2004Date of Patent: September 21, 2010Assignee: Amiteq Co., Ltd.Inventors: Atsutoshi Goto, Kazuya Sakamoto, Hiroshi Sakamoto
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Publication number: 20100085039Abstract: A plurality of layers of flat coils are stacked and connected in series with each other to form a single coil pole, and the coil pole is energized by an A.C. signal. Magnetism-responsive member, provided to be opposed to the coil pole in a non-contact manner, is displaced relative to the coil pole, so that correspondency, to the coil section, of the magnetism-responsive member varies in response to variation in the relative position and thus impedance variation occurs in the coil pole. Position detection signal is provided on the basis of an output signal, responsive to the impedance variation, taken out from the coil pole.Type: ApplicationFiled: June 23, 2006Publication date: April 8, 2010Applicant: AMITEQ CO., LTD.Inventor: Atsutoshi Goto
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Publication number: 20090267593Abstract: A first sensor detects a rotational position of a first shaft in a noncontact fashion and generates a first output signal by phase-shifting a reference A.C. signal in accordance with the detected rotational position of the first shaft. A second sensor detects a rotational position of a second shaft in a noncontact fashion and generates a second output signal by phase-shifting the reference A.C. signal in accordance with the detected rotational position of the second shaft. First and second timing signals corresponding to phase shift amounts of the first and second output signals are output via respective output lines. Relative rotational position detection data, representing a rotational difference or amount of torsion between the two shafts, appears in a time difference between the first and second timing signals. A PWM signal, having a pulse width corresponding to a time difference between the first and second timing signals, may be output.Type: ApplicationFiled: November 19, 2004Publication date: October 29, 2009Applicant: AMITEQ CO., LTD.Inventors: Atsutoshi Goto, Kazuya Sakamoto, Hiroshi Sakamoto
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Patent number: 7331247Abstract: First and second shafts (1, 2) are interconnected via a torsion bar (3) for torsional (or rotational) movement relative to each other, and first and second magnetic body sections (10, 20) are provided to rotate in interlocked relation to the rotation of the first and second shafts, respectively. The first and second magnetic body sections form at least two ring-shaped variable magnetic coupling sections opposed to each other via a gap, magnetic coupling in each of the boundary sections varies in response to variation of a relative rotational position between the first and second shafts, and variation of the magnetic coupling differs in phase between the boundary sections. Coil section (30) includes magnetic-coupling detecting coils (L1-L4) provided in corresponding relation to the boundary sections.Type: GrantFiled: August 27, 2004Date of Patent: February 19, 2008Assignee: Amiteq Co., Ltd.Inventors: Atsutoshi Goto, Kazuya Sakamoto, Hiroshi Sakamoto
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Publication number: 20070007950Abstract: First and second shafts (1, 2) are interconnected via a torsion bar (3) for torsional (or rotational) movement relative to each other, and first and second magnetic body sections (10, 20) are provided to rotate in interlocked relation to the rotation of the first and second shafts, respectively. The first and second magnetic body sections form at least two ring-shaped variable magnetic coupling sections opposed to each other via a gap, magnetic coupling in each of the boundary sections varies in response to variation of a relative rotational position between the first and second shafts, and variation of the magnetic coupling differs in phase between the boundary sections. Coil section (30) includes magnetic-coupling detecting coils (L1-L4) provided in corresponding relation to the boundary sections.Type: ApplicationFiled: August 27, 2004Publication date: January 11, 2007Applicant: Amiteq Co., Ltd.Inventors: Atsutoshi Goto, Kazuya Sakamoto, Hiroshi Sakamoto
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Patent number: 6885310Abstract: Two A.C. output signals amplitude-modulated in accordance with two function values (sine and cosine) differing from each other in correspondence to a position-to-be-detected are received from a position sensor such as a resolver. By performing an addition or subtraction between a signal derived by shifting the electric phase of one of the received A.C. output signals by a predetermined angle, and the other received signal, two electric A.C. signals (sin(?t±d+?), sin((?t±d??)) are electrically synthesized which have electric phase angles (?) corresponding to the position-to-be-detected and are phase-shifted in opposite directions. “±d” here represents phase variation error caused by factors, other than the position-to-be-detected, such as temperature change. In the synthesized two signals, the phase variation errors (±d) appear in the same direction, while the phase differences (?) corresponding to the position are shifted in opposite, positive and negative, directions.Type: GrantFiled: March 3, 2003Date of Patent: April 26, 2005Inventors: Atsutoshi Goto, Yasuhiro Yuasa, Shuichi Tanaka, Nobuyuki Akatsu, Kazuya Sakamoto, Hiroshi Sakamoto, Akio Yamamoto
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Patent number: 6823745Abstract: An outer cylindrical section is rotatable with a first shaft. Magnetic shielding portions are formed of a magnetic shielding or antimagnetic substance and arranged on a surface of a nonmagnetic and nonconductive cylindrical base. The magnetic shielding portions are spaced apart from each other by a predetermined interval in a circumferential direction of the cylindrical base so that non-magnetically-shielding portions are formed between the magnetic shielding portions. A plurality of coils are provided on a periphery of the outer cylindrical section and excitable by a predetermined A.C. signal. An inner cylindrical section is inserted in the outer cylindrical section and rotatable with a second shaft. The inner cylindrical section includes magnetic portions each provided to present a different characteristic with respect to an arrangement of the plurality of coils.Type: GrantFiled: May 6, 2003Date of Patent: November 30, 2004Assignee: Amiteq Co., Ltd.Inventors: Atsutoshi Goto, Kazuya Sakamoto, Hiroshi Sakamoto
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Patent number: 6779624Abstract: In a control unit for use with a power steering apparatus, there are provided and integrated into a single body, a main operating fluid feed device for supplying the hydraulic cylinder with an amount of oil corresponding to the amount of rotation of the steering wheel H, an auxiliary operating fluid feed device for supplying a correcting oil for adjusting drive of said hydraulic cylinder according to control signal, and a steering wheel angle sensor disposed around the rotating shaft of the steering wheel connected to said main operating fluid feed device, to detect steering wheel angle corresponding to the rotating position of said steering wheel.Type: GrantFiled: May 12, 2003Date of Patent: August 24, 2004Assignee: Eaton CorporationInventors: Atsutoshi Goto, Hiroshi Sakamoto, Yasuhiro Yuasa, Shuichi Tanaka, Shigeru Muraoka, Masakuni Tanaka
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Patent number: 6707291Abstract: Single coil to be excited by a predetermined A.C. signal is provided, with no secondary coil being provided. Magnetism-responsive member is movable relative to the coil so that a self-inductance of the coil progressively increases or decreases in response to displacement of an object to be detected within a predetermined range and a voltage of the coil corresponding to the self-inductance is produced. Predetermined reference voltage is generated and subjected to analog operations with the coil output voltage, to thereby generate first and second A.C. outputs having, as amplitude coefficients, first and second cyclic amplitude functions correlated to the position to be detected. The position is detected on the basis of the phase component of the amplitude coefficient functions. Combination of two coils and one reference voltage may be employed.Type: GrantFiled: December 31, 2002Date of Patent: March 16, 2004Inventors: Atsutoshi Goto, Kazuya Sakamoto, Hiroshi Sakamoto
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Publication number: 20040003955Abstract: In a control unit for use with a power steering apparatus, there are provided and integrated into a single body, a main operating fluid feed device for supplying the hydraulic cylinder with an amount of oil corresponding to the amount of rotation of the steering wheel H, an auxiliary operating fluid feed device for supplying a correcting oil for adjusting drive of said hydraulic cylinder according to control signal, and a steering wheel angle sensor disposed around the rotating shaft of the steering wheel connected to said main operating fluid feed device, to detect steering wheel angle corresponding to the rotating position of said steering wheel.Type: ApplicationFiled: May 12, 2003Publication date: January 8, 2004Inventors: Atsutoshi Goto, Hiroshi Sakamoto, Yasuhiro Yuasa, Shuichi Tanaka, Shigeru Muraoka, Masakuni Tanaka
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Publication number: 20030196496Abstract: An outer cylindrical section is rotatable with a first shaft. Magnetic shielding portions are formed of a magnetic shielding or antimagnetic substance and arranged on a surface of a nonmagnetic and nonconductive cylindrical base. The magnetic shielding portions are spaced apart from each other by a predetermined interval in a circumferential direction of the cylindrical base so that non-magnetically-shielding portions are formed between the magnetic shielding portions. A plurality of coils are provided on a periphery of the outer cylindrical section and excitable by a predetermined A.C. signal. An inner cylindrical section is inserted in the outer cylindrical section and rotatable with a second shaft. The inner cylindrical section includes magnetic portions each provided to present a different characteristic with respect to an arrangement of the plurality of coils.Type: ApplicationFiled: May 6, 2003Publication date: October 23, 2003Applicant: AMITEQ Co., Ltd.Inventors: Atsutoshi Goto, Kazuya Sakamoto, Hiroshi Sakamoto