Patents by Inventor Takashige INAGAKI
Takashige INAGAKI 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: 11699935Abstract: A motor includes a stator and a rotor having a rotor shaft. The motor includes a bearing having an inner ring and an outer ring that are configured to rotate relative to each other. The inner ring is supported by the rotor shaft. The motor also includes a holder that supports the outer ring. The holder is clearance-fitted to a retainer on a stator side. A rotation prevention apparatus configured to prevent the rotation of the holder is positioned between the holder and a stopper member on the stator side.Type: GrantFiled: July 19, 2019Date of Patent: July 11, 2023Assignee: AISAN KOGYO KABUSHIKI KAISHAInventors: Nobuhiro Kato, Takashige Inagaki, Hidemasa Torii, Keiji Nakaya, Takuhito Fujiwara
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Patent number: 11655827Abstract: A centrifugal pump includes a motor portion including a rotor rotatably disposed in a rotor chamber and includes a pump portion including an impeller rotatably disposed in a pump chamber. The impeller is coupled to the rotor. The centrifugal pump also includes a casing that separates the rotor chamber from the pump chamber, and a bearing that rotatably supports a rotor shaft of the rotor and to which grease is supplied is provided. Two communication holes extend through the casing and provide fluid communication between the rotor chamber and the pump chamber.Type: GrantFiled: September 17, 2019Date of Patent: May 23, 2023Assignee: AISAN KOGYO KABUSHIKI KAISHAInventors: Nobuhiro Kato, Takashige Inagaki, Keiji Nakaya, Hidemasa Torii
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Publication number: 20210324875Abstract: A centrifugal pump includes a motor portion including a rotor rotatably disposed in a rotor chamber and includes a pump portion including an impeller rotatably disposed in a pump chamber. The impeller is coupled to the rotor. The centrifugal pump also includes a casing that separates the rotor chamber from the pump chamber, and a bearing that rotatably supports a rotor shaft of the rotor and to which grease is supplied is provided. Two communication holes extend through the casing and provide fluid communication between the rotor chamber and the pump chamber.Type: ApplicationFiled: September 17, 2019Publication date: October 21, 2021Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Nobuhiro KATO, Takashige INAGAKI, Keiji NAKAYA, Hidemasa TORII
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Patent number: 11041577Abstract: A double eccentric valve: a valve seat; a rotary shaft; a valve gear with a rotary shaft base end portion; a motor rotating the shaft via a valve gear; bearings supporting the shaft in a cantilever manner; a return spring giving, to the valve gear, spring force for rotating the shaft in a valve body closing direction; and a full-close stopper to restrict valve gear rotation with the shaft when the valve body is fully closed. When the motor is not driven, the valve gear partially contacts the full-close stopper by spring force, moment acting on the valve gear is caused to act on the rotary shaft with the contact point serving as a fulcrum, the rotary shaft is tilted toward the valve seat with the contact point between the rotary shaft and the bearing serving as a fulcrum, and thus, the valve body is pressed against the valve seat.Type: GrantFiled: July 19, 2018Date of Patent: June 22, 2021Assignee: AISAN KOGYO KABUSHIKI KAISHAInventors: Takashige Inagaki, Mamoru Yoshioka, Akihito Kuno, Makoto Fukui
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Patent number: 10982772Abstract: An eccentric valve has a drive mechanism, a drive force receiving part, a bearing for supporting a rotary shaft, and a return spring for generating a return spring force. During non-operation of the drive mechanism, the eccentric valve generates a separating-direction urging force to cause the rotary shaft to incline about the bearing serving as a fulcrum and urge the valve element in a direction away from the valve seat, the separating-direction urging force being a force caused by the return spring force. Either the valve element or the valve seat is provided with a sealing member to seal between the valve element and the valve seat during non-operation of the drive mechanism.Type: GrantFiled: May 6, 2019Date of Patent: April 20, 2021Assignee: AISAN KOGYO KABUSHIKI KAISHAInventors: Mamoru Yoshioka, Kasumi Mishima, Naruto Ito, Makoto Fukui, Takashige Inagaki, Sunao Kitamura, Hiroshi Misumi
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Publication number: 20200217430Abstract: A double eccentric valve: a valve seat; a rotary shaft; a valve gear with a rotary shaft base end portion; a motor rotating the shaft via a valve gear; bearings supporting the shaft in a cantilever manner; a return spring giving, to the valve gear, spring force for rotating the shaft in a valve body closing direction; and a full-close stopper to restrict valve gear rotation with the shaft when the valve body is fully closed. When the motor is not driven, the valve gear partially contacts the full-close stopper by spring force, moment acting on the valve gear is caused to act on the rotary shaft with the contact point serving as a fulcrum, the rotary shaft is tilted toward the valve seat with the contact point between the rotary shaft and the bearing serving as a fulcrum, and thus, the valve body is pressed against the valve seat.Type: ApplicationFiled: July 19, 2018Publication date: July 9, 2020Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Takashige INAGAKI, Mamoru YOSHIOKA, Akihito KUNO, Makoto FUKUI
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Patent number: 10655572Abstract: A valve housing that has a flow passage. Arranged in the flow passage are a valve seat that includes a valve hole, valve body that can be seated on the valve seat, and a section of a rotary shaft with the valve body fixed to the tip thereof. A ring-shaped seat surface is formed in the valve hole of the valve seat. A ring-shaped sealing surface corresponding to the seat surface is formed on the perimeter of the disc-shaped valve body. By rotating the rotary shaft, the valve body rotates open from a closed state in which the valve body is seated on the valve seat and the sealing surface is in contact with the seat surface. A tapered upstream-side flow regulating part is provided in the valve hole of the valve seat, so as to widen from the seat surface toward the upstream side of the EGR gas flow.Type: GrantFiled: March 30, 2017Date of Patent: May 19, 2020Assignee: AISAN KOGYO KABUSHIKI KAISHAInventors: Takashige Inagaki, Mamoru Yoshioka, Naruto Ito
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Patent number: 10408352Abstract: A flow control valve comprising a valve seat provided with a valve hole and a seat surface, a valve element formed with a sealing surface corresponding to the seat surface, and a rotary shaft to which the valve element is integrally provided, the central axis of the rotary shaft being arranged eccentrically toward the radial direction of the valve hole from the central axis of the valve hole, and the sealing surface being arranged eccentrically toward the direction in which the central axis of the valve element extends from the central axis of the rotary shaft. The flow control valve has a valve element movement direction restriction member for stopping rotation of the valve element, and thereafter moving the valve element toward the valve seat while also relatively rotating the valve element about the eccentric axis eccentric from the central axis of the rotary shaft, relative to the rotary shaft.Type: GrantFiled: December 22, 2016Date of Patent: September 10, 2019Assignee: AISAN KOGYO KABUSHIKI KAISHAInventors: Makoto Fukui, Mamoru Yoshioka, Naruto Ito, Takashige Inagaki, Kasumi Mishima
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Publication number: 20190257430Abstract: An eccentric valve has a drive mechanism, a drive force receiving part, a bearing for supporting a rotary shaft, and a return spring for generating a return spring force. During non-operation of the drive mechanism, the eccentric valve generates a separating-direction urging force to cause the rotary shaft to incline about the bearing serving as a fulcrum and urge the valve element in a direction away from the valve seal, the separating-direction urging force being a force caused by the return spring force. Either the valve element or the valve seat is provided with a sealing member to seal between the valve element and the valve seat during non-operation of the drive mechanism.Type: ApplicationFiled: May 6, 2019Publication date: August 22, 2019Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Mamoru YOSHIOKA, Kasumi MISHIMA, Naruto ITO, Makoto FUKUI, Takashige INAGAKI, Sunao KITAMURA, Hiroshi MISUMI
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Publication number: 20190203673Abstract: A valve housing that has a flow passage. Arranged in the flow passage are a valve seat that includes a valve hole, valve body that can be seated on the valve seat, and a section of a rotary shaft with the valve body fixed to the tip thereof. A ring-shaped seat surface is formed in the valve hole of the valve seat. A ring-shaped sealing surface corresponding to the seat surface is formed on the perimeter of the disc-shaped valve body. By rotating the rotary shaft, the valve body rotates open from a closed state in which the valve body is seated on the valve seat and the sealing surface is in contact with the seat surface. A tapered upstream-side flow regulating part is provided in the valve hole of the valve seat, so as to widen from the seat surface toward the upstream side of the EGR gas flow.Type: ApplicationFiled: March 30, 2017Publication date: July 4, 2019Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Takashige INAGAKI, Mamoru YOSHIOKA, Naruto ITO
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Patent number: 10337467Abstract: An EGR valve includes a valve seat in a flow passage of a housing, a valve element seatable on the valve seat, a rotary shaft to open or close the valve element, a motor and a speed reducing mechanism, a return spring urging the valve element in a valve closing direction, and an opening-degree sensor to detect an opening degree of the valve element. An electronic control unit (ECU) diagnoses abnormality due to lodging of foreign matter between the valve seat and the valve element during full close. When driving the motor to urge the valve element in the valve closing direction during full close of the valve element, the ECU determines the EGR valve to be abnormal because of lodging of foreign matter if a difference between a value detected by the opening-degree sensor and a predetermined reference value is larger than a first determination value.Type: GrantFiled: October 12, 2017Date of Patent: July 2, 2019Assignee: AISAN KOGYO KABUSHIKI KAISHAInventors: Mamoru Yoshioka, Takashige Inagaki, Naruto Ito, Toshiyuki Fujimura
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Patent number: 10337622Abstract: An eccentric valve has a drive mechanism, a drive force receiving part, a bearing for supporting a rotary shaft, and a return spring for generating a return spring force. During non-operation of the drive mechanism, the eccentric valve generates a separating-direction urging force to cause the rotary shaft to incline about the bearing serving as a fulcrum and urge the valve element in a direction away from the valve seat, the separating-direction urging force being a force caused by the return spring force. Either the valve element or the valve seat is provided with a sealing member to seal between the valve element and the valve seat during non-operation of the drive mechanism.Type: GrantFiled: September 15, 2016Date of Patent: July 2, 2019Assignee: AISAN KOGYO KABUSHIKI KAISHAInventors: Mamoru Yoshioka, Kasumi Mishima, Naruto Ito, Makoto Fukui, Takashige Inagaki, Sunao Kitamura, Hiroshi Misumi
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Publication number: 20190136981Abstract: In an EGR valve including a double eccentric valve, a passage is divided into upstream and downstream passages with the valve seat as the boundary and the valve element is disposed in the upstream passage. The valve element includes a first side part and a second side part that have as a boundary a virtual surface extending from the axis of the rotary shaft parallel to the direction in which the axis of the valve element extends. When the valve element rotates in the valve-opening direction from the fully closed state, the first side part rotates into the downstream passage and the second side part rotates into the upstream passage. A valve closing stopper is provided to be engageable with the first side part. A return spring for rotationally biasing the valve element in the fully closed state in the direction of valve-closing is also provided.Type: ApplicationFiled: March 30, 2017Publication date: May 9, 2019Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Takashige INAGAKI, Sunao KITAMURA, Shinji KAWAI, Naruto ITO, Mamoru YOSHIOKA
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Publication number: 20190056032Abstract: An eccentric valve has a drive mechanism, a drive force receiving part, a bearing for supporting a rotary shaft, and a return spring for generating a return spring force. During non-operation of the drive mechanism, the eccentric valve generates a separating-direction urging force to cause the rotary shaft to incline about the bearing serving as a fulcrum and urge the valve element in a direction away from the valve seat, the separating-direction urging force being a force caused by the return spring force. Either the valve element or the valve seat is provided with a sealing member to seal between the valve element and the valve seat during non-operation of the drive mechanism.Type: ApplicationFiled: September 15, 2016Publication date: February 21, 2019Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Mamoru YOSHIOKA, Kasumi MISHIMA, Naruto ITO, Makoto FUKUI, Takashige INAGAKI, Sunao KITAMURA, Hiroshi MISUMI
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Publication number: 20180320790Abstract: A flow control valve comprising a valve seat provided with a valve hole and a seat surface, a valve element formed with a sealing surface corresponding to the seat surface, and a rotary shaft to which the valve element is integrally provided, the central axis of the rotary shaft being arranged eccentrically toward the radial direction of the valve hole from the central axis of the valve hole, and the sealing surface being arranged eccentrically toward the direction in which the central axis of the valve element extends from the central axis of the rotary shaft. The flow control valve has a valve element movement direction restriction member for stopping rotation of the valve element, and thereafter moving the valve element toward the valve seat while also relatively rotating the valve element about the eccentric axis eccentric from the central axis of the rotary shaft, relative to the rotary shaft.Type: ApplicationFiled: December 22, 2016Publication date: November 8, 2018Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Makoto FUKUI, Mamoru YOSHIOKA, Naruto ITO, Takashige INAGAKI, Kasumi MISHIMA
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Publication number: 20180106220Abstract: An EGR valve includes a valve seat in a flow passage of a housing, a valve element seatable on the valve seat, a rotary shaft to open or close the valve element, a motor and a speed reducing mechanism, a return spring urging the valve element in a valve closing direction, and an opening-degree sensor to detect an opening degree of the valve element. An electronic control unit (ECU) diagnoses abnormality due to lodging of foreign matter between the valve seat and the valve element during full close. When driving the motor to urge the valve element in the valve closing direction during full close of the valve element, the ECU determines the EGR valve to be abnormal because of lodging of foreign matter if a difference between a value detected by the opening-degree sensor and a predetermined reference value is larger than a first determination value.Type: ApplicationFiled: October 12, 2017Publication date: April 19, 2018Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Mamoru YOSHIOKA, Takashige INAGAKI, Naruto ITO, Toshiyuki FUJIMURA
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Patent number: 9376988Abstract: In an EGR valve, a valve element is moved with respect to a valve seat to adjust a passage section width of a measuring section, thereby regulating an EGR gas flow rate in a passage. The valve seat includes a valve hole, a first end face facing to a downstream side of the passage and a second end face facing to an upstream side of the passage. The inner circumferential surface of the valve hole has a concave curved shape with an inner diameter gradually increasing toward the second end face. The valve element is placed inside the valve hole to be movable in between a fully closed position and a fully open position. While the valve element is placed in the fully open position, passage section widths of parts of the measuring section in an EGR gas flow direction are approximate to each other.Type: GrantFiled: December 2, 2013Date of Patent: June 28, 2016Assignees: AISAN KOGYO KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroshi Asanuma, Yoshimasa Ito, Kazumasa Nakashima, Takashige Inagaki, Tomoyuki Noguchi, Takashi Tomita, Junji Torishima, Taro Furukubo
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Publication number: 20140158098Abstract: In an EGR valve, a valve element is moved with respect to a valve seat to adjust a passage section width of a measuring section, thereby regulating an EGR gas flow rate in a passage. The valve seat includes a valve hole, a first end face facing to a downstream side of the passage and a second end face facing to an upstream side of the passage. The inner circumferential surface of the valve hole has a concave curved shape with an inner diameter gradually increasing toward the second end face. The valve element is placed inside the valve hole to be movable in between a fully closed position and a fully open position. While the valve element is placed in the fully open position, passage section widths of parts of the measuring section in an EGR gas flow direction are approximate to each other.Type: ApplicationFiled: December 2, 2013Publication date: June 12, 2014Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISAN KOGYO KABUSHIKI KAISHAInventors: Hiroshi ASANUMA, Yoshimasa ITO, Kazumasa NAKASHIMA, Takashige INAGAKI, Tomoyuki NOGUCHI, Takashi TOMITA, Junji TORISHIMA, Taro FURUKUBO