Patents by Inventor Tomokuni Kato
Tomokuni Kato 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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Publication number: 20230223881Abstract: A motor control device includes: a first duty ratio computation unit to compute a first duty ratio to be used for control of a motor body portion on the basis of a target rotational position of a rotor and a rotational position of the rotor; a second duty ratio computation unit to compute a second duty ratio corresponding to an upper limit of the absolute value of the first duty ratio on the basis of a linear function including a variable corresponding to the number of rotations of the rotor; and a control signal output unit to output a control signal corresponding to the first duty ratio when the absolute value of the first duty ratio is smaller than the absolute value of the second duty ratio, and to output a control signal corresponding to the second duty ratio when it is not.Type: ApplicationFiled: August 6, 2020Publication date: July 13, 2023Applicant: Mitsubishi Electric CorporationInventors: Ryo AWAYA, Sachiko KAWASAKI, Tomokuni KATO, Taihei KAWASAKA, Naoki IMAMURA, Satoshi KAWAMURA
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Patent number: 10774795Abstract: In a valve device (1), when a valve (33) is closed, an output shaft of an actuator unit (10) is connected to the valve (33). A control unit of the valve device (1) determines a control constant to be a value by which a response speed of the actuator unit (10) is smaller as ambient temperature is higher, and performs feedback control.Type: GrantFiled: March 9, 2016Date of Patent: September 15, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Tomokuni Kato, Atsushi Morimoto
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Publication number: 20190085796Abstract: In a valve device (1), when a valve (33) is closed, an output shaft of an actuator unit (10) is connected to the valve (33). A control unit of the valve device (1) determines a control constant to be a value by which a response speed of the actuator unit (10) is smaller as ambient temperature is higher, and performs feedback control.Type: ApplicationFiled: March 9, 2016Publication date: March 21, 2019Applicant: Mitsubishi Electric CorporationInventors: Tomokuni KATO, Atsushi MORIMOTO
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Patent number: 9257885Abstract: A motor is provided with an insert nut 10 that has a knurled part 101 at two places on the surface thereof along an axial direction thereof with projections 103 for whirl stop and slip-off stop formed on the knurled part, and that is embedded between the motor rotor 3 and the magnet assembly 7 to perform fastening between the motor rotor 3 and the magnet assembly 7, and in the insert nut 10, a concave part 104 between the knurled parts 101 is situated at a mounting boundary between the motor rotor 3 and the magnet assembly 7.Type: GrantFiled: March 25, 2011Date of Patent: February 9, 2016Assignee: MITSUBISHI ELECTRIC CORPORATIONInventor: Tomokuni Kato
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Patent number: 8690122Abstract: A valve device has integrally assembled thereto a valve side housing 2 having a valve seat 1, a motor side housing 4 provided with a motor 3, and a feeder-side housing 5 having a feeder unit, wherein a valve stem 8 provided with a valve 7 for abutting against the valve seat 1 is extended to the interior of the feeder-side housing, a rotation stopper 9 of the valve stem 8 is provided at a predetermined position of the valve stem on its way to the feeder-side housing, a screw section 11 is provided around the portion of the valve stem passing through the center hole 35a of the rotor 35 of the motor 3, the screw section being in mesh with a thread section 10 formed around the surface of the center hole thereof, and a valve position detecting sensor is provided within the feeder-side housing 5.Type: GrantFiled: September 8, 2008Date of Patent: April 8, 2014Assignee: Mitsubishi Electric CorporationInventors: Tomokuni Kato, Masayuki Yokoyama, Youichi Fujita
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Publication number: 20130270972Abstract: A motor is provided with an insert nut 10 that has a knurled part 101 at two places on the surface thereof along an axial direction thereof with projections 103 for whirl stop and slip-off stop formed on the knurled part, and that is embedded between the motor rotor 3 and the magnet assembly 7 to perform fastening between the motor rotor 3 and the magnet assembly 7, and in the insert nut 10, a concave part 104 between the knurled parts 101 is situated at a mounting boundary between the motor rotor 3 and the magnet assembly 7.Type: ApplicationFiled: March 25, 2011Publication date: October 17, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventor: Tomokuni Kato
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Publication number: 20100270486Abstract: A valve device has integrally assembled thereto a valve side housing 2 having a valve seat 1, a motor side housing 4 provided with a motor 3, and a feeder-side housing 5 having a feeder unit, wherein a valve stem 8 provided with a valve 7 for abutting against the valve seat 1 is extended to the interior of the feeder-side housing, a rotation stopper 9 of the valve stem 8 is provided at a predetermined position of the valve stem on its way to the feeder-side housing, a screw section 11 is provided around the portion of the valve stem passing through the center hole 35a of the rotor 35 of the motor 3, the screw section being in mesh with a thread section 10 formed around the surface of the center hole thereof, and a valve position detecting sensor is provided within the feeder-side housing 5.Type: ApplicationFiled: September 8, 2008Publication date: October 28, 2010Inventors: Tomokuni Kato, Masayuki Yokoyama, Youichi Fujita
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Patent number: 7358632Abstract: A sliding hole is formed so that a screw portion can pass therethrough. Also, a seal member is provided at a portion, through which the screw portion placed in the sliding hole can pass and in which a sliding portion does not slide.Type: GrantFiled: June 27, 2006Date of Patent: April 15, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kenta Hatano, Youichi Fujita, Sotsuo Miyoshi, Tomokuni Kato
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Patent number: 7274122Abstract: A sliding hole is formed so that a screw portion can pass therethrough. Also, a seal member is provided at a portion, through which the screw portion placed in the sliding hole can pass and in which a sliding portion does not slide.Type: GrantFiled: June 27, 2006Date of Patent: September 25, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kenta Hatano, Youichi Fujita, Sotsuo Miyoshi, Tomokuni Kato
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Patent number: 7205690Abstract: A sliding hole is formed so that a screw portion can pass therethrough. Also, a seal member is provided at a portion, through which the screw portion placed in the sliding hole can pass and in which a sliding portion does not slide.Type: GrantFiled: July 19, 2004Date of Patent: April 17, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kenta Hatano, Youichi Fujita, Sotsuo Miyoshi, Tomokuni Kato
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Publication number: 20060244323Abstract: A sliding hole is formed so that a screw portion can pass therethrough. Also, a seal member is provided at a portion, through which the screw portion placed in the sliding hole can pass and in which a sliding portion does not slide.Type: ApplicationFiled: June 27, 2006Publication date: November 2, 2006Inventors: Kenta Hatano, Youichi Fujita, Sotsuo Miyoshi, Tomokuni Kato
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Publication number: 20060238046Abstract: A sliding hole is formed so that a screw portion can pass therethrough. Also, a seal member is provided at a portion, through which the screw portion placed in the sliding hole can pass and in which a sliding portion does not slide.Type: ApplicationFiled: June 27, 2006Publication date: October 26, 2006Inventors: Kenta Hatano, Youichi Fujita, Sotsuo Miyoshi, Tomokuni Kato
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Publication number: 20060238045Abstract: A sliding hole is formed so that a screw portion can pass therethrough. Also, a seal member is provided at a portion, through which the screw portion placed in the sliding hole can pass and in which a sliding portion does not slide.Type: ApplicationFiled: June 27, 2006Publication date: October 26, 2006Inventors: Kenta Hatano, Youichi Fujita, Sotsuo Miyoshi, Tomokuni Kato
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Publication number: 20050012415Abstract: A sliding hole is formed so that a screw portion can pass therethrough. Also, a seal member is provided at a portion, through which the screw portion placed in the sliding hole can pass and in which a sliding portion does not slide.Type: ApplicationFiled: July 19, 2004Publication date: January 20, 2005Inventors: Kenta Hatano, Youichi Fujita, Sotsuo Miyoshi, Tomokuni Kato