Patents by Inventor Hirofumi Hagio
Hirofumi Hagio 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: 10539430Abstract: A sensor of a position detecting device includes a sensor body, a magnetic detector, and at least one engagement protrusion that extends from a position in the vicinity of the magnetic detector. The engagement protrusion engages with an engagement hole disposed on a casing. An anti-rotation hole is disposed on the casing in a position spaced apart from the engagement hole. An anti-rotation pin is disposed on the sensor body, and engages with the anti-rotation hole to prevent the casing and the sensor body from rotating relatively to each other about the engagement hole. At least a part of the engagement protrusion is in contact with an inner wall of the engagement hole on a straight line L connecting a center of the magnetic detector and a center of the anti-rotation pin.Type: GrantFiled: December 16, 2016Date of Patent: January 21, 2020Assignee: DENSO CORPORATIONInventors: Hitomi Honda, Yoshiyuki Kono, Hirofumi Hagio
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Publication number: 20190011286Abstract: A sensor of a position detecting device includes a sensor body, a magnetic detector, and at least one engagement protrusion that extends from a position in the vicinity of the magnetic detector. The engagement protrusion engages with an engagement hole disposed on a casing. An anti-rotation hole is disposed on the casing in a position spaced apart from the engagement hole. An anti-rotation pin is disposed on the sensor body, and engages with the anti-rotation hole to prevent the casing and the sensor body from rotating relatively to each other about the engagement hole. At least a part of the engagement protrusion is in contact with an inner wall of the engagement hole on a straight line L connecting a center of the magnetic detector and a center of the anti-rotation pin.Type: ApplicationFiled: December 16, 2016Publication date: January 10, 2019Inventors: Hitomi HONDA, Yoshiyuki KONO, Hirofumi HAGIO
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Patent number: 9172169Abstract: A terminal arrangement device electrically connects an electric device, which is received in a housing, to an external device, and includes a first connecting terminal fixed to the housing. The first connecting terminal has a first supporting portion and a second supporting portion which are elastically deformable such that an output terminal of the electric device is supported between the first supporting portion and the second supporting portion. The first supporting portion has a flexural rigidity which is different from a flexural rigidity of the second supporting portion.Type: GrantFiled: November 22, 2013Date of Patent: October 27, 2015Assignee: DENSO CORPORATIONInventors: Hirofumi Hagio, Takehito Mizunuma, Takamitsu Kubota
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Publication number: 20140148066Abstract: A terminal arrangement device electrically connects an electric device, which is received in a housing, to an external device, and includes a first connecting terminal fixed to the housing. The first connecting terminal has a first supporting portion and a second supporting portion which are elastically deformable such that an output terminal of the electric device is supported between the first supporting portion and the second supporting portion. The first supporting portion has a flexural rigidity which is different from a flexural rigidity of the second supporting portion.Type: ApplicationFiled: November 22, 2013Publication date: May 29, 2014Applicant: DENSO CORPORATIONInventors: Hirofumi HAGIO, Takehito MIZUNUMA, Takamitsu KUBOTA
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Patent number: 6845649Abstract: A method for calibrating a rotation angle sensor having a magnet, a magnetic detector disposed in a magnetic field of the magnet for outputting a detected value indicative of a direction of the magnetic field that varies in accordance with a rotation angle of a rotatable member, and an output circuit which transforms the detected value to an output value in accordance with a transforming characteristic and outputs the output value, the method entailing: assembling the magnet, the magnetic detector and the output circuit to a device that has the rotatable member; rotating the rotatable member to a predetermined reference angle; measuring the detected value or the output value as a measured value when the rotatable member is at the reference angle; and setting the transforming characteristic based on the measured value so that the output circuit outputs a reference output value at the reference angle.Type: GrantFiled: June 7, 2002Date of Patent: January 25, 2005Assignee: Denso CorporationInventors: Takamitsu Kubota, Naoyuki Kamiya, Hirofumi Hagio, Takashi Hamaoka
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Patent number: 6819102Abstract: Non-contact type Hall ICs detecting an rotation angle of a throttle valve, a stator core strengthening a magnetic field around the Hall ICs, a lead frame connecting the Hall ICs to an outside ECU are integrated in a sensor cover by resin molding. Thus, the Hall ICs, the stator core, and the lead frame are accurately positioned in the sensor cover. As a result, the Hall ICs are accurately positioned with respect to a permanent magnet disposed in a shaft side of the throttle valve, thereby improving an accuracy of detecting the rotation angle of the throttle valve.Type: GrantFiled: December 18, 2003Date of Patent: November 16, 2004Assignee: Denso CorporationInventors: Hirofumi Hagio, Takashi Hamaoka, Yoshiyuki Kono, Takamitsu Kubota, Tomokazu Kondo
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Publication number: 20040135574Abstract: Non-contact type Hall ICs detecting an rotation angle of a throttle valve, a stator core strengthening a magnetic field around the Hall ICs, a lead frame connecting the Hall ICs to an outside ECU are integrated in a sensor cover by resin molding. Thus, the Hall ICs, the stator core, and the lead frame are accurately positioned in the sensor cover. As a result, the Hall ICs are accurately positioned with respect to a permanent magnet disposed in a shaft side of the throttle valve, thereby improving an accuracy of detecting the rotation angle of the throttle valve.Type: ApplicationFiled: December 18, 2003Publication date: July 15, 2004Applicant: DENSO CORPORATIONInventors: Hirofumi Hagio, Takashi Hamaoka, Yoshiyuki Kono, Takamitsu Kubota, Tomokazu Kondo
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Patent number: 6756780Abstract: Non-contact type Hall ICs detecting an rotation angle of a throttle valve, a stator core strengthening a magnetic field around the Hall ICs, a lead frame connecting the Hall ICs to an outside ECU are integrated in a sensor cover by resin molding. Thus, the Hall ICs, the stator core, and the lead frame are accurately positioned in the sensor cover. As a result, the Hall ICs are accurately positioned with respect to a permanent magnet disposed in a shaft side of the throttle valve, thereby improving an accuracy of detecting the rotation angle of the throttle valve.Type: GrantFiled: May 9, 2002Date of Patent: June 29, 2004Assignee: Denso CorporationInventors: Hirofumi Hagio, Takashi Hamaoka, Yoshiyuki Kono, Takamitsu Kubota, Tomokazu Kondo
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Patent number: 6502544Abstract: If outputs of a couple of Hall ICs constituting a throttle valve position sensor are within an operating range of throttle valve position, and if a relationship between the outputs are within a predetermined error range, both the Hall ICs are determined to be normal. In contrast, if the outputs are equal to an upper clamp voltage or a lower clamp voltage, and if a relationship between the outputs is out of the predetermined error range, at least one of the Hall ICs is determined to be abnormal. Furthermore, if the outputs are within a failure reference voltage range, it is determined that there is an abnormality between the throttle valve position sensor and an ECU. In this way, abnormalities in the sensor and abnormalities between the sensor and the ECU can also be detected.Type: GrantFiled: December 19, 2000Date of Patent: January 7, 2003Assignee: Denso CorporationInventors: Takamitsu Kubota, Naoyuki Kamiya, Hirofumi Hagio, Takashi Hamaoka
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Patent number: 6499461Abstract: Hall ICs constituting a redundant throttle valve position sensor are used to measure a rotational angle value indicative of a position of a throttle valve and a temperature value indicative of an ambient temperature change, which is continuously monitored, around the Hall ICs. The rotational angle value measured by the Hall ICs is appropriately adjusted based on the measure temperature value of its own, and a throttle valve position is determined in an externally connected ECU based on the adjusted angle value. In addition, the temperature value measured by one Hall IC is inputted to the ECU. In the ECU, various control values, such as a resistance value of an electric motor, can be appropriately adjusted based on the measured temperature value.Type: GrantFiled: December 18, 2000Date of Patent: December 31, 2002Assignee: Denso CorporationInventors: Takamitsu Kubota, Naoyuki Kamiya, Hirofumi Hagio, Takashi Hamaoka
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Publication number: 20020166362Abstract: A method for calibrating a rotation angle sensor having a magnet, a magnetic detector disposed in a magnetic field of the magnet for outputting a detected value indicative of a direction of the magnetic field that varies in accordance with a rotation angle of a rotatable member, and an output circuit which transforms the detected value to an output value in accordance with a transforming characteristic and outputs the output value, the method entailing: assembling the magnet, the magnetic detector and the output circuit to a device that has the rotatable member; rotating the rotatable member to a predetermined reference angle; measuring the detected value or the output value as a measured value when the rotatable member is at the reference angle; and setting the transforming characteristic based on the measured value so that the output circuit outputs a reference output value at the reference angle.Type: ApplicationFiled: June 7, 2002Publication date: November 14, 2002Applicant: Denso CorporationInventors: Takamitsu Kubota, Naoyuki Kamiya, Hirofumi Hagio, Takashi Hamaoka
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Publication number: 20020130656Abstract: Non-contact type Hall ICs detecting an rotation angle of a throttle valve, a stator core strengthening a magnetic field around the Hall ICs, a lead frame connecting the Hall ICs to an outside ECU are integrated in a sensor cover by resin molding. Thus, the Hall ICs, the stator core, and the lead frame are accurately positioned in the sensor cover. As a result, the Hall ICs are accurately positioned with respect to a permanent magnet disposed in a shaft side of the throttle valve, thereby improving an accuracy of detecting the rotation angle of the throttle valve.Type: ApplicationFiled: May 9, 2002Publication date: September 19, 2002Applicant: DENSO CORPORATIONInventors: Hirofumi Hagio, Takashi Hamaoka, Yoshiyuki Kono, Takamitsu Kubota, Tomokazu Kondo
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Patent number: 6407543Abstract: Non-contact type Hall ICs detecting an rotation angle of a throttle valve, a stator core strengthening a magnetic field around the Hall ICs, a lead frame connecting the Hall ICs to an outside ECU are integrated in a sensor cover by resin molding. Thus, the Hall ICs, the stator core, and the lead frame are accurately positioned in the sensor cover. As a result, the Hall ICs are accurately positioned with respect to a permanent magnet disposed in a shaft side of the throttle valve, thereby improving an accuracy of detecting the rotation angle of the throttle valve.Type: GrantFiled: October 13, 2000Date of Patent: June 18, 2002Assignee: Denso CorporationInventors: Hirofumi Hagio, Takashi Hamaoka, Yoshiyuki Kono, Takamitsu Kubota, Tomokazu Kondo
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Publication number: 20010004213Abstract: If outputs of a couple of Hall ICs constituting a throttle valve position sensor are within an operating range of throttle valve position, and if a relationship between the outputs are within a predetermined error range, both the Hall ICs are determined to be normal. In contrast, if the outputs are equal to an upper clamp voltage or a lower clamp voltage, and if a relationship between the outputs is out of the predetermined error range, at least one of the Hall ICs is determined to be abnormal. Furthermore, if the outputs are within a failure reference voltage range, it is determined that there is an abnormality between the throttle valve position sensor and an ECU. In this way, abnormalities in the sensor and abnormalities between the sensor and the ECU can also be detected.Type: ApplicationFiled: December 19, 2000Publication date: June 21, 2001Inventors: Takamitsu Kubota, Naoyuki Kamiya, Hirofumi Hagio, Takashi Hamaoka
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Publication number: 20010004215Abstract: Hall ICs constituting a redundant throttle valve position sensor are used to measure a rotational angle value indicative of a position of a throttle valve and a temperature value indicative of an ambient temperature change, which is continuously monitored, around the Hall ICs. The rotational angle value measured by the Hall ICs is appropriately adjusted based on the measure temperature value of its own, and a throttle valve position is determined in an externally connected ECU based on the adjusted angle value. In addition, the temperature value measured by one Hall IC is inputted to the ECU. In the ECU, various control values, such as a resistance value of an electric motor, can be appropriately adjusted based on the measured temperature value.Type: ApplicationFiled: December 18, 2000Publication date: June 21, 2001Inventors: Takamitsu Kubota, Naoyuki Kamiya, Hirofumi Hagio, Takashi Hamaoka
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Publication number: 20010003421Abstract: In the present invention, Hall ICs are mounted opposite to a permanent magnet fixed onto a rotary shaft of a throttle valve. The rotary shaft is rotated to adjust the throttle valve to a predetermined degree of opening and is fixed temporarily to that throttle opening. An output value corresponding to that throttle opening is written into the Hall ICs from the exterior. That is, writing of the throttle opening output value is done in only the final stage after completion of the mounting of the Hall ICs.Type: ApplicationFiled: December 7, 2000Publication date: June 14, 2001Inventors: Takamitsu Kubota, Naoyuki Kamiya, Hirofumi Hagio, Takashi Hamaoka