Patents by Inventor Takahiro Kouzu
Takahiro Kouzu 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: 8841802Abstract: An axial groove is provided in an inner peripheral wall surface of a motor case of a housing of a motor actuator, and a spring installation opening is provided to the axial groove at a location adjacent to an opening end of a motor receiving hole of the motor case, which receives a motor. A damper spring is inserted into the groove through the spring installation opening. The damper spring urges the motor against first and second ridges formed in the inner peripheral wall surface of the motor case.Type: GrantFiled: November 6, 2006Date of Patent: September 23, 2014Assignee: Denso CorporationInventors: Takahiro Kouzu, Satoshi Ishigaki, Tadashi Komiyama
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Patent number: 7958722Abstract: A valve device includes a control valve for manipulating a communication between a first fluid channel and a second fluid channel. The valve device further includes a pressure sensor for detecting pressure in the first fluid channel. The pressure sensor is provided on a side face defining the first fluid channel. The pressure sensor has a pressure detection face directly opposed to the first fluid channel. The pressure detection face is substantially in parallel with a first axis of the first fluid channel.Type: GrantFiled: November 5, 2007Date of Patent: June 14, 2011Assignee: Denso CorporationInventors: Tadashi Komiyama, Satoshi Ishigaki, Takahiro Kouzu
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Patent number: 7543794Abstract: A torque-transmitting device is advantageously applied to a secondary air control valve mounted on an automotive vehicle. The device includes a gear train for reducing a rotational speed of a motor and a mechanism for converting a rotational motion to a linear motion of a valve shaft. The gear train includes a final gear coupled to the valve shaft, and the final gear includes a flange positioned at an axial end of an axis of the final gear. A coil spring for biasing the final gear toward a predetermined position is disposed next to the flange and around the axis of the final gear. Slits or holes are formed through the flange, so that holding jigs for holding the coil spring are inserted, in an assembling process, into a cylindrical space between an inner circumference of the coil spring and the axis of the final gear.Type: GrantFiled: November 6, 2006Date of Patent: June 9, 2009Assignee: Denso CorporationInventors: Takahiro Kouzu, Satoshi Ishigaki, Tadashi Komiyama
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Publication number: 20080110159Abstract: A valve device includes a control valve for manipulating a communication between a first fluid channel and a second fluid channel. The valve device further includes a pressure sensor for detecting pressure in the first fluid channel. The pressure sensor is provided on a side face defining the first fluid channel. The pressure sensor has a pressure detection face directly opposed to the first fluid channel. The pressure detection face is substantially in parallel with a first axis of the first fluid channel.Type: ApplicationFiled: November 5, 2007Publication date: May 15, 2008Applicant: DENSO CORPORATIONInventors: Tadashi KOMIYAMA, Satoshi Ishigaki, Takahiro Kouzu
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Patent number: 7318577Abstract: A motor-operated valve assembly has a housing, a motor, a driving force transmission means and a valve member. The housing has a fluid passage therein. The motor is installed in the housing. The driving force transmission means has an output rotor rotatably supported by the housing and transmits a driving force of the motor to the output rotor. The valve member is supported by the housing between the motor and the output rotor to be slidable in an axial direction thereof and engaged with the output rotor so that the output rotor slides the valve member to open and close the fluid passage.Type: GrantFiled: April 5, 2006Date of Patent: January 15, 2008Assignee: Denso CorporationInventors: Takahiro Kouzu, Tadashi Komiyama
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Publication number: 20070102660Abstract: A torque-transmitting device is advantageously applied to a secondary air control valve mounted on an automotive vehicle. The device includes a gear train for reducing a rotational speed of a motor and a mechanism for converting a rotational motion to a linear motion of a valve shaft. The gear train includes a final gear coupled to the valve shaft, and the final gear includes a flange positioned at an axial end of an axis of the final gear. A coil spring for biasing the final gear toward a predetermined position is disposed next to the flange and around the axis of the final gear. Slits or holes are formed through the flange, so that holding jigs for holing the coil spring are inserted, in an assembling process, into a cylindrical space between an inner circumference of the coil spring and the axis of the final gear.Type: ApplicationFiled: November 6, 2006Publication date: May 10, 2007Applicant: DENSO CORPORATIONInventors: Takahiro Kouzu, Satoshi Ishigaki, Tadashi Komiyama
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Publication number: 20070103010Abstract: An axial groove is provided in an inner peripheral wall surface of a motor case of a housing of a motor actuator, and a spring installation opening is provided to the axial groove at a location adjacent to an opening end of a motor receiving hole of the motor case, which receives a motor. A damper spring is inserted into the groove through the spring installation opening. The damper spring urges the motor against first and second ridges formed in the inner peripheral wall surface of the motor case.Type: ApplicationFiled: November 6, 2006Publication date: May 10, 2007Applicant: DENSO CORPORATIONInventors: Takahiro Kouzu, Satoshi Ishigaki, Tadashi Komiyama
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Patent number: 7178330Abstract: A secondary air pressure detecting apparatus includes a solenoid valve and a pressure sensor. The solenoid valve defines a secondary air passage that introduces secondary air from the air pump into the exhaust system of an engine. The solenoid valve opens and closes the secondary air passage. The pressure sensor is integrally mounted to the solenoid valve to detect pressure of secondary air in the solenoid valve. The solenoid valve includes a coil assembly and magnetic members. The coil assembly includes a solenoid coil that generates magnetic force when the solenoid coil is energized. The magnetic members construct a magnetic circuit with the solenoid coil. The magnetic circuit is arranged outside of the secondary air passage. The pressure sensor is arranged on an opposite side of the secondary air passage with respect to the magnetic circuit.Type: GrantFiled: March 10, 2005Date of Patent: February 20, 2007Assignee: Denso CorporationInventors: Takahiro Kouzu, Tadashi Komiyama
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Publication number: 20070017577Abstract: A fluid control valve assembly is disclosed that includes a housing. The housing defines an inlet pipe and a valve port in fluid communication with the inlet pipe, such that a fluid passes from the inlet pipe and through the valve port. The inlet pipe defines an inlet pipe axis and the valve port defines a valve port axis. The fluid control valve assembly also includes a valve movably supported within the housing. The valve includes a valve head for opening and closing the valve and a valve shaft coupled to the valve head. The valve shaft defines a valve axis that is coaxial with the valve port axis. The inlet pipe is orientated toward the valve port such that a positive, acute angle is formed between the inlet pipe axis and a plane perpendicular to the valve axis.Type: ApplicationFiled: July 11, 2006Publication date: January 25, 2007Applicant: DENSO CORPORATIONInventors: Takahiro Kouzu, Tadashi Komiyama
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Publication number: 20070017217Abstract: An air control device is advantageously used as a device for supplying secondary air to a catalyzer contained in an exhaust pipe of an internal combustion engine. The air control device includes an electric motor, a speed reduction mechanism, a valve having a valve shaft and a biasing spring. These components are all contained in a housing that has a valve port formed therein. The valve is driven to open the valve port by the electric motor against a biasing force of the biasing spring. A rotational movement of a final gear in the speed reduction mechanism is converted into a linear movement of the valve shaft to thereby open the valve port. Since the biasing spring such as a torsion spring is wound around a flange connected to an axis of the final gear, a length of the valve shaft is made short, and the device as a whole is made compact.Type: ApplicationFiled: July 11, 2006Publication date: January 25, 2007Applicant: Denso CorporationInventors: Takahiro Kouzu, Tadashi Komiyama
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Publication number: 20060226385Abstract: A motor-operated valve assembly has a housing, a motor, a driving force transmission means and a valve member. The housing has a fluid passage therein. The motor is installed in the housing. The driving force transmission means has an output rotor rotatably supported by the housing and transmits a driving force of the motor to the output rotor. The valve member is supported by the housing between the motor and the output rotor to be slidable in an axial direction thereof and engaged with the output rotor so that the output rotor slides the valve member to open and close the fluid passage.Type: ApplicationFiled: April 5, 2006Publication date: October 12, 2006Applicant: DENSO CORPORATIONInventors: Takahiro Kouzu, Tadashi Komiyama
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Publication number: 20050204732Abstract: A secondary air pressure detecting apparatus includes a solenoid valve and a pressure sensor. The solenoid valve defines a secondary air passage that introduces secondary air from the air pump into the exhaust system of an engine. The solenoid valve opens and closes the secondary air passage. The pressure sensor is integrally mounted to the solenoid valve to detect pressure of secondary air in the solenoid valve. The solenoid valve includes a coil assembly and magnetic members. The coil assembly includes a solenoid coil that generates magnetic force when the solenoid coil is energized. The magnetic members construct a magnetic circuit with the solenoid coil. The magnetic circuit is arranged outside of the secondary air passage. The pressure sensor is arranged on an opposite side of the secondary air passage with respect to the magnetic circuit.Type: ApplicationFiled: March 10, 2005Publication date: September 22, 2005Inventors: Takahiro Kouzu, Tadashi Komiyama