Patents by Inventor Yoshikatsu Hashimoto
Yoshikatsu Hashimoto 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: 7367315Abstract: The invention provides a throttle valve control apparatus provided with a throttle sensor which is in trouble at a low possibility and has a long service life, whereby an accurate output of a throttle opening degree can be obtained. The throttle valve control apparatus of an internal combustion engine has a throttle opening degree sensor constituted by an non-contact sensor using hole elements.Type: GrantFiled: August 9, 2006Date of Patent: May 6, 2008Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Eisuke Wayama, Toshifumi Usui, Yoshikatsu Hashimoto, Shigeru Tokumoto, Yasuo Saito
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Publication number: 20070012288Abstract: The invention provides a throttle valve control apparatus provided with a throttle sensor which is in trouble at a low possibility and has a long service life, whereby an accurate output of a throttle opening degree can be obtained. The throttle valve control apparatus of an internal combustion engine ahs a throttle opening degree sensor constituted by a non-contact sensor using hole elements.Type: ApplicationFiled: September 25, 2006Publication date: January 18, 2007Applicants: HITACHI LTD., HITACHI CAR ENGINEERING CO., LTD.Inventors: Eisuke Wayama, Toshifumi Usui, Yoshikatsu Hashimoto, Shigeru Tokumoto, Yasuo Saito
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Patent number: 7152581Abstract: The invention provides a throttle valve control apparatus provided with a throttle sensor which is in trouble at a low possibility and has a long service life, whereby an accurate output of a throttle opening degree can be obtained. The throttle valve control apparatus of an internal combustion engine has a throttle opening degree sensor constituted by an non-contact sensor using hole elements.Type: GrantFiled: December 31, 2003Date of Patent: December 26, 2006Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Eisuke Wayama, Toshifumi Usui, Yoshikatsu Hashimoto, Shigeru Tokumoto, Yasuo Saito
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Publication number: 20060272615Abstract: The invention provides a throttle valve control apparatus provided with a throttle sensor which is in trouble at a low possibility and has a long service life, whereby an accurate output of a throttle opening degree can be obtained. The throttle valve control apparatus of an internal combustion engine has a throttle opening degree sensor constituted by an non-contact sensor using hole elements.Type: ApplicationFiled: August 9, 2006Publication date: December 7, 2006Applicants: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Eisuke Wayama, Toshifumi Usui, Yoshikatsu Hashimoto, Shigeru Tokumoto, Yasuo Saito
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Patent number: 7121259Abstract: A throttle device for an internal-combustion engine, in which, on one surface of a throttle body side wall is formed a mounting space for mounting a reduction gear mechanism which transmits the power of a motor to a throttle valve shaft; and a throttle sensor for detecting the throttle valve opening is built inside of the gear cover covering the mounting space, and is covered with a sensor cover. A shaft hole of a rotor of the throttle sensor is exposed out through the sensor cover. When the gear cover is attached to the side wall of the throttle body, one end of the throttle valve shaft fits in the rotor shaft hole by elastically deforming a fitting spring inserted in the shaft hole, thereby enabling downsizing, weight reduction, and simplification of assembly and wiring harness of the electronically controlled throttle device, and realization of stabilized operation and improved accuracy of the throttle sensor.Type: GrantFiled: October 24, 2005Date of Patent: October 17, 2006Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Eisuke Wayama, Yoshikatsu Hashimoto, Yasuo Saito, Toshifumi Usui
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Patent number: 7093581Abstract: The invention provides a throttle valve control apparatus provided with a throttle sensor which is in trouble at a low possibility and has a long service life, whereby an accurate output of a throttle opening degree can be obtained. The throttle valve control apparatus of an internal combustion engine has a throttle opening degree sensor constituted by a non-contact sensor using hall elements.Type: GrantFiled: January 23, 2004Date of Patent: August 22, 2006Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Eisuke Wayama, Toshifumi Usui, Yoshikatsu Hashimoto, Shigeru Tokumoto, Yasuo Saito
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Patent number: 7055498Abstract: In a throttle body there are provided a throttle valve for controlling the flow of intake air in an internal combustion engine, an electrically-driven actuator for actuating the throttle valve, and a reduction gear mechanism for the actuator, and a receptacle portion for receiving the reduction gear mechanism therein is formed in a side wall of the throttle body. A cover which covers the receptacle portion is attached to a side wall of the throttle body. The throttle assembly of the invention is provided with a potentiometer type sensor for detecting the degree of opening of the throttle valve, the sensor comprising a slider and a resistor, the slider being adapted to slide on the resistor and mounted to a peripheral surface of a driven gear so that a tip end thereof faces in a radial direction of a throttle valve shaft, the driven gear being disposed on the throttle valve shaft side of the reduction gear mechanism.Type: GrantFiled: December 18, 2003Date of Patent: June 6, 2006Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Yoshikatsu Hashimoto, Toshifumi Usui, Shigeru Tokumoto, Yasuo Saito, Eisuki Wayama
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Publication number: 20060042594Abstract: A throttle device for an internal-combustion engine, in which, on one surface of a throttle body side wall is formed a mounting space for mounting a reduction gear mechanism which transmits the power of a motor to a throttle valve shaft; and a throttle sensor for detecting the throttle valve opening is built inside of the gear cover covering the mounting space, and is covered with a sensor cover. A shaft hole of a rotor of the throttle sensor is exposed out through the sensor cover. When the gear cover is attached to the side wall of the throttle body, one end of the throttle valve shaft fits in the rotor shaft hole by elastically deforming a fitting spring inserted in the shaft hole, thereby enabling downsizing, weight reduction, and simplification of assembly and wiring harness of the electronically controlled throttle device, and realization of stabilized operation and improved accuracy of the throttle sensor.Type: ApplicationFiled: October 24, 2005Publication date: March 2, 2006Inventors: Eisuke Wayama, Yoshikatsu Hashimoto, Yasuo Saito, Toshifumi Usui
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Patent number: 6966297Abstract: A throttle device for an internal-combustion engine, in which, on one surface of a throttle body side wall is formed a mounting space for mounting a reduction gear mechanism which transmits the power of a motor to a throttle valve shaft; and a throttle sensor for detecting the throttle valve opening is built inside of the gear cover covering the mounting space, and is covered with a sensor cover. A shaft hole of a rotor of the throttle sensor is exposed out through the sensor cover. When the gear cover is attached to the side wall of the throttle body, one end of the throttle valve shaft fits in the rotor shaft hole by elastically deforming a fitting spring inserted in the shaft hole, thereby enabling downsizing, weight reduction, and simplification of assembly and wiring harness of the electronically controlled throttle device, and realization of stabilized operation and improved accuracy of the throttle sensor.Type: GrantFiled: September 24, 2003Date of Patent: November 22, 2005Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Eisuke Wayama, Yoshikatsu Hashimoto, Yasuo Saito, Toshifumi Usui
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Patent number: 6945228Abstract: Disclosed is a throttle device for an internal-combustion engine, in which, on one side of the side wall of a throttle body, there are formed a space for mounting a reduction gear mechanism which transmits the power from a motor to a throttle valve shaft and a default opening setting mechanism for holding a throttle valve opening at a specific opening (default opening) when the ignition switch is in off position, and a gear cover mounting frame which edges the mounting space. The frame is formed lower than the mounting level of the reduction gear mechanism. A gear cover for covering the gear mounting space is attached on the frame. A stopper for defining the default opening and a stopper for defining the full-closed position of the throttle valve are juxtaposed so as to enable position adjustments in the same direction.Type: GrantFiled: June 16, 2003Date of Patent: September 20, 2005Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Yasuo Saito, Yoshikatsu Hashimoto, Eisuke Wayama, Toshifumi Usui
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Publication number: 20040154589Abstract: The invention provides a throttle valve control apparatus provided with a throttle sensor which is in trouble at a low possibility and has a long service life, whereby an accurate output of a throttle opening degree can be obtained. The throttle valve control apparatus of an internal combustion engine has a throttle opening degree sensor constituted by an non-contact sensor using hole elements.Type: ApplicationFiled: January 23, 2004Publication date: August 12, 2004Applicants: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Eisuke Wayama, Toshifumi Usui, Yoshikatsu Hashimoto, Shigeru Tokumoto, Yasuo Saito
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Publication number: 20040149262Abstract: The invention provides a throttle valve control apparatus provided with a throttle sensor which is in trouble at a low possibility and has a long service life, whereby an accurate output of a throttle opening degree can be obtained. The throttle valve control apparatus of an internal combustion engine has a throttle opening degree sensor constituted by an non-contact sensor using hole elements.Type: ApplicationFiled: December 31, 2003Publication date: August 5, 2004Applicants: HITACHI LTD., HITACHI CAR ENGINEERING CO., LTD.Inventors: Eisuke Wayama, Toshifumi Usui, Yoshikatsu Hashimoto, Shigeru Tokumoto, Yasuo Saito
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Publication number: 20040129252Abstract: A throttle device for an internal-combustion engine, in which, on one surface of a throttle body side wall is formed a mounting space for mounting a reduction gear mechanism which transmits the power of a motor to a throttle valve shaft; and a throttle sensor for detecting the throttle valve opening is built inside of the gear cover covering the mounting space, and is covered with a sensor cover. A shaft hole of a rotor of the throttle sensor is exposed out through the sensor cover. When the gear cover is attached to the side wall of the throttle body, one end of the throttle valve shaft fits in the rotor shaft hole by elastically deforming a fitting spring inserted in the shaft hole, thereby enabling downsizing, weight reduction, and simplification of assembly and wiring harness of the electronically controlled throttle device, and realization of stabilized operation and improved accuracy of the throttle sensor.Type: ApplicationFiled: September 24, 2003Publication date: July 8, 2004Inventors: Eisuke Wayama, Yoshikatsu Hashimoto, Yasuo Saito, Toshifumi Usui
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Publication number: 20040123838Abstract: In a throttle body there are provided a throttle valve for controlling the flow of intake air in an internal combustion engine, an electrically-driven actuator for actuating the throttle valve, and a reduction gear mechanism for the actuator, and a receptacle portion for receiving the reduction gear mechanism therein is formed in a side wall of the throttle body. A cover which covers the receptacle portion is attached to a side wall of the throttle body. The throttle assembly of the invention is provided with a potentiometer type sensor for detecting the degree of opening of the throttle valve, the sensor comprising a slider and a resistor, the slider being adapted to slide on the resistor and mounted to a peripheral surface of a driven gear so that a tip end thereof faces in a radial direction of a throttle valve shaft, the driven gear being disposed on the throttle valve shaft side of the reduction gear mechanism.Type: ApplicationFiled: December 18, 2003Publication date: July 1, 2004Applicants: HITACHI LTD., HITACHI CAR ENGINEERING CO., LTD.Inventors: Yoshikatsu Hashimoto, Toshifumi Usui, Shigeru Tokumoto, Yasuo Saito, Eisuke Wayama
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Patent number: 6701892Abstract: The invention provides a throttle valve control apparatus provided with a throttle sensor which is in trouble at a low possibility and has a long service life, whereby an accurate output of a throttle opening degree can be obtained. The throttle valve control apparatus of an internal combustion engine has a throttle opening degree sensor constituted by an non-contact sensor using hole elements.Type: GrantFiled: February 28, 2001Date of Patent: March 9, 2004Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Eisuke Wayama, Toshifumi Usui, Yoshikatsu Hashimoto, Shigeru Tokumoto, Yasuo Saito
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Patent number: 6691678Abstract: In a throttle body there are provided a throttle valve for controlling the flow of intake air in an internal combustion engine, and an electrically-driven actuator for actuating the throttle valve. A cover, which covers a receptacle portion, is attached to a side wall of the throttle body. The throttle assembly of the invention is provided with a potentiometer type sensor for detecting the degree of opening of the throttle valve, the sensor comprising a slider and a resistor, the slider being adapted to slide on the resistor and mounted to a peripheral surface of a driven gear so that a tip end thereof faces in a radial direction of a throttle valve shaft. The resistor is constituted by a curved resistor which confronts the slider in the said radial direction. A wall portion which holds the curved resistor is formed by molding integrally with the aforesaid cover.Type: GrantFiled: August 15, 2001Date of Patent: February 17, 2004Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Yoshikatsu Hashimoto, Toshifumi Usui, Shigeru Tokumoto, Yasuo Saito, Eisuke Wayama
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Publication number: 20030196640Abstract: Disclosed is a throttle device for an internal-combustion engine, in which, on one side of the side wall of a throttle body, there are formed a space for mounting a reduction gear mechanism which transmits the power from a motor to a throttle valve shaft and a default opening setting mechanism for holding a throttle valve opening at a specific opening (default opening) when the ignition switch is in off position, and a gear cover mounting frame which edges the mounting space. The frame is formed lower than the mounting level of the reduction gear mechanism. A gear cover for covering the gear mounting space is attached on the frame. A stopper for defining the default opening and a stopper for defining the full-closed position of the throttle valve are juxtaposed so as to enable position adjustments in the same direction.Type: ApplicationFiled: June 16, 2003Publication date: October 23, 2003Applicants: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Yasuo Saito, Yoshikatsu Hashimoto, Eisuke Wayama, Toshifumi Usui
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Patent number: 6626143Abstract: A throttle device for an internal-combustion engine, in which, on one surface of a throttle body side wall is formed a mounting space for mounting a reduction gear mechanism which transmits the power of a motor to a throttle valve shaft; and a throttle sensor for detecting the throttle valve opening is built inside of the gear cover covering the mounting space, and is covered with a sensor cover. A shaft hole of a rotor of the throttle sensor is exposed out through the sensor cover. When the gear cover is attached to the side wall of the throttle body, one end of the throttle valve shaft fits in the rotor shaft hole by elastically deforming a fitting spring inserted in the shaft hole, thereby enabling downsizing, weight reduction, and simplification of assembly and wiring harness of the electronically controlled throttle device, and realization of stabilized operation and improved accuracy of the throttle sensor.Type: GrantFiled: January 18, 2000Date of Patent: September 30, 2003Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Eisuke Wayama, Yoshikatsu Hashimoto, Yasuo Saito, Toshifumi Usui
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Patent number: 6591809Abstract: Disclosed is a throttle device for an internal-combustion engine, in which, on one side of the side wall of a throttle body, there are formed a space for mounting a reduction gear mechanism which transmits the power from a motor to a throttle valve shaft and a default opening setting mechanism for holding a throttle valve opening at a specific opening (default opening) when the ignition switch is in off position, and a gear cover mounting frame which edges the mounting space. The frame is formed lower than the mounting level of the reduction gear mechanism. A gear cover for covering the gear mounting space is attached on the frame. A stopper for defining the default opening and a stopper for defining the full-closed position of the throttle valve are juxtaposed so as to enable position adjustments in the same direction.Type: GrantFiled: November 19, 2002Date of Patent: July 15, 2003Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Yasuo Saito, Yoshikatsu Hashimoto, Eisuke Wayama, Toshifumi Usui
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Publication number: 20030066515Abstract: Disclosed is a throttle device for an internal-combustion engine, in which, on one side of the side wall of a throttle body, there are formed a space for mounting a reduction gear mechanism which transmits the power from a motor to a throttle valve shaft and a default opening setting mechanism for holding a throttle valve opening at a specific opening (default opening) when the ignition switch is in off position, and a gear cover mounting frame which edges the mounting space. The frame is formed lower than the mounting level of the reduction gear mechanism. A gear cover for covering the gear mounting space is attached on the frame. A stopper for defining the default opening and a stopper for defining the full-closed position of the throttle valve are juxtaposed so as to enable position adjustments in the same direction.Type: ApplicationFiled: November 19, 2002Publication date: April 10, 2003Applicant: Hitachi, Ltd.Inventors: Yasuo Saito, Yoshikatsu Hashimoto, Eisuke Wayama, Toshifumi Usui