Patents by Inventor Kazuhiko Ohtsuka
Kazuhiko Ohtsuka 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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Thermal flow sensor having an amplifier section for adjusting the temperature of the heating element
Patent number: 7658102Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: GrantFiled: September 12, 2008Date of Patent: February 9, 2010Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazuhiko Ohtsuka, Yuji Ariyoshi -
Thermal flow sensor having an amplifier section for adjusting the temperature of the heating element
Patent number: 7574909Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: GrantFiled: September 12, 2008Date of Patent: August 18, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazuhiko Ohtsuka, Yuji Ariyoshi -
Thermal flow sensor having an amplifier section for adjusting the temperature of the heating element
Patent number: 7568388Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: GrantFiled: September 12, 2008Date of Patent: August 4, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazuhiko Ohtsuka, Yuji Ariyoshi -
Thermal flow sensor having an amplifier section for adjusting the temperature of the heating element
Patent number: 7568387Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: GrantFiled: September 12, 2008Date of Patent: August 4, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazuhiko Ohtsuka, Yuji Ariyoshi -
Thermal flow sensor having an amplifier section for adjusting the temperature of the heating element
Patent number: 7562569Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: GrantFiled: September 12, 2008Date of Patent: July 21, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazuhiko Ohtsuka, Yuji Ariyoshi -
Thermal flow sensor having an amplifier section for adjusting the temperature of the heating element
Patent number: 7487674Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: GrantFiled: January 14, 2008Date of Patent: February 10, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazuhiko Ohtsuka, Yuji Ariyoshi -
THERMAL FLOW SENSOR HAVING AN AMPLIFIER SECTION FOR ADJUSTING THE TEMPERATURE OF THE HEATING ELEMENT
Publication number: 20090013777Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: ApplicationFiled: September 12, 2008Publication date: January 15, 2009Inventors: Kazuhiko OHTSUKA, Yuji Ariyoshi -
THERMAL FLOW SENSOR HAVING AN AMPLIFIER SECTION FOR ADJUSTING THE TEMPERATURE OF THE HEATING ELEMENT
Publication number: 20090007657Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: ApplicationFiled: September 12, 2008Publication date: January 8, 2009Inventors: Kazuhiko Ohtsuka, Yuji Ariyoshi -
THERMAL FLOW SENSOR HAVING AN AMPLIFIER SECTION FOR ADJUSTING THE TEMPERATURE OF THE HEATING ELEMENT
Publication number: 20090007656Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: ApplicationFiled: September 12, 2008Publication date: January 8, 2009Inventors: Kazuhiko Ohtsuka, Yuji Ariyoshi -
THERMAL FLOW SENSOR HAVING AN AMPLIFIER SECTION FOR ADJUSTING THE TEMPERATURE OF THE HEATING ELEMENT
Publication number: 20090007655Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: ApplicationFiled: September 12, 2008Publication date: January 8, 2009Inventors: Kazuhiko OHTSUKA, Yuji Ariyoshi -
THERMAL FLOW SENSOR HAVING AN AMPLIFIER SECTION FOR ADJUSTING THE TEMPERATURE OF THE HEATING ELEMENT
Publication number: 20090007658Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: ApplicationFiled: September 12, 2008Publication date: January 8, 2009Inventors: Kazuhiko OHTSUKA, Yuji Ariyoshi -
Thermal Flow Sensor Having an Amplifier Section for Adjusting the Temperature of the Heating Element
Publication number: 20080178669Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: ApplicationFiled: January 14, 2008Publication date: July 31, 2008Inventors: Kazuhiko OHTSUKA, Yuji Ariyoshi -
Patent number: 7367439Abstract: The electromagnetic clutch comprises a rotor connected to a drive source, an inner hub connected to a device that follows, an outer plate provided on the outside of the inner hub so as to enclose it, an armature coupled to the outer plate and opposing the rotor, an elastic member provided between the inner hub and the outer plate and adhered thereto, and an electromagnetic coil for, when magnetized, attracting the armature together with the outer plate to make them come into contact with the rotor, and when demagnetized, separating the outer plate and the armature from the rotor. Because of the configuration in which the armature and the outer plate are coupled in a heat-transmissible manner, a part of elastic member is formed so that heat is transmitted from at least a part of the armature to the part of the elastic member as if they are one piece.Type: GrantFiled: May 31, 2005Date of Patent: May 6, 2008Assignee: Denso CorporationInventors: Kazuhiko Ohtsuka, Yasuo Tabuchi, Toshihiro Hayashi
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Patent number: 7360445Abstract: A flow sensor need not have any special terminal for voltage value supply, and can obtain a ratiometric output function at low cost and small size. A calculation circuit calculates, as a reference voltage Vr, a voltage value Vref of an A/D conversion reference power supply in a fuel injection control unit from a terminal voltage of a temperature sensor, and supplies the reference voltage Vr thus calculated by the calculation circuit to a ratiometric output circuit. As a result, a ratiometric output function can be achieved while making it unnecessary a special terminal used only for the purpose of supplying the voltage value Vref.Type: GrantFiled: February 14, 2007Date of Patent: April 22, 2008Assignee: Mitsubishi Electric CorporationInventors: Kazuhiko Ohtsuka, Masahiro Kawai
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Publication number: 20080077334Abstract: A flow sensor need not have any special terminal for voltage value supply, and can obtain a ratiometric output function at low cost and small size. A calculation circuit calculates, as a reference voltage Vr, a voltage value Vref of an A/D conversion reference power supply in a fuel injection control unit from a terminal voltage of a temperature sensor, and supplies the reference voltage Vr thus calculated by the calculation circuit to a ratiometric output circuit. As a result, a ratiometric output function can be achieved while making it unnecessary a special terminal used only for the purpose of supplying the voltage value Vref.Type: ApplicationFiled: February 14, 2007Publication date: March 27, 2008Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kazuhiko Ohtsuka, Masahiro Kawai
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Thermal flow sensor having an amplifier section for adjusting the temperature of the heating element
Patent number: 7325449Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: GrantFiled: May 1, 2006Date of Patent: February 5, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazuhiko Ohtsuka, Yuji Ariyoshi -
Publication number: 20070113643Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).Type: ApplicationFiled: May 1, 2006Publication date: May 24, 2007Inventors: Kazuhiko Ohtsuka, Yuji Ariyoshi
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Publication number: 20050269183Abstract: The electromagnetic clutch comprises a rotor connected to a drive source, an inner hub connected to a device that follows, an outer plate provided on the outside of the inner hub so as to enclose it, an armature coupled to the outer plate and opposing the rotor, an elastic member provided between the inner hub and the outer plate and adhered thereto, and an electromagnetic coil for, when magnetized, attracting the armature together with the outer plate to make them come into contact with the rotor, and when demagnetized, separating the outer plate and the armature from the rotor. Because of the configuration in which the armature and the outer plate are coupled in a heat-transmissible manner, a part of elastic member is formed so that heat is transmitted from at least a part of the armature to the part of the elastic member as if they are one piece.Type: ApplicationFiled: May 31, 2005Publication date: December 8, 2005Applicant: DENSO CorporationInventors: Kazuhiko Ohtsuka, Yasuo Tabuchi, Toshihiro Hayashi