Patents by Inventor Seiichiro Washino
Seiichiro Washino 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: 20230344304Abstract: A power transmission device includes: a pole piece configured to rotate by modulating a magnetic flux between a drive-side magnet and a stationary magnet; and a sealing member that partitions an inside of a housing into a driving side space where the drive-side magnet is disposed and a driven side space where the stationary magnet and the pole piece are disposed, so as to seal fluid between the driving side space and the driven side space. The pole piece and the stationary magnet have a cylindrical shape and are disposed coaxially with and radially outer side of the drive-side magnet. The sealing member includes: a sealing cylinder portion positioned radially outer side of the drive-side magnet; and a sealing bottom surface portion covering the sealing cylinder portion from the driving side space.Type: ApplicationFiled: June 12, 2023Publication date: October 26, 2023Inventors: Takafumi MATSUMOTO, Hiroto INOUE, Takuro SAHARA, Shinji HASHIMOTO, Ryu FUKUSHIMA, Ryotaro SUZUKI, Riku OUCHI, Shinji KAWADA, Toshihisa NAKAJIMA, Seiichiro WASHINO
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Patent number: 11601074Abstract: An actuator capable of attaining high output. The actuator includes a frame structure part that forms a frame structure surrounding a housing part, and a volume change part housed in the housing part. The volume change part increases a volume thereof by input of external energy. The frame structure part has a higher Young's modulus than a Young's modulus of the volume change part. The housing part has an anisotropic shape, with a maximum width in first direction of the housing part longer than a maximum width in second direction different from the first direction of the housing part.Type: GrantFiled: March 24, 2021Date of Patent: March 7, 2023Assignees: DENSO CORPORATION, TOKYO INSTITUTE OF TECHNOLOGY, NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEMInventors: Daichi Sakurai, Seiichiro Washino, Shota Chatani, Haruhiko Watanabe, Masatoshi Shioya, Daisuke Kimura, Toshihira Irisawa, Kentaro Takagi, Takashi Hasegawa
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Publication number: 20210305917Abstract: An actuator capable of attaining high output. The actuator includes a frame structure part that forms a frame structure surrounding a housing part, and a volume change part housed in the housing part. The volume change part increases a volume thereof by input of external energy. The frame structure part has a higher Young's modulus than a Young's modulus of the volume change part. The housing part has an anisotropic shape, with a maximum width in first direction of the housing part longer than a maximum width in second direction different from the first direction of the housing part.Type: ApplicationFiled: March 24, 2021Publication date: September 30, 2021Applicants: DENSO CORPORATION, TOKYO INSTITUTE OF TECHNOLOGY, NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEMInventors: Daichi SAKURAI, Seiichiro WASHINO, Shota CHATANI, Haruhiko WATANABE, Masatoshi SHIOYA, Daisuke KIMURA, Toshihira IRISAWA, Kentaro TAKAGI, Takashi HASEGAWA
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Patent number: 11025178Abstract: An actuator device includes an actuator member, a drive subject, a drive device, and a tension applicator. The actuator member is configured to be deformed in response to application of energy to the actuator member from an outside of the actuator member. The drive subject is coupled to the actuator member. The drive device is configured to apply the energy to the actuator member and thereby displace the drive subject in a deforming direction of the actuator member. The tension applicator is configured to apply the actuator member a tension, which enables correction of a tension change generated by at least one of elongation and contraction of the actuator member that is induced by natural deformation of the actuator member.Type: GrantFiled: March 13, 2019Date of Patent: June 1, 2021Assignee: DENSO CORPORATIONInventors: Takuma Yamauchi, Eitaro Tanaka, Haruhiko Watanabe, Goro Ueda, Seiichiro Washino
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Patent number: 11002256Abstract: A movable device includes an actuator element that deforms about an actuator axis in response to increase or decrease in energy of the actuator element. A driven body is coupled to the actuator element on the actuator axis and turned by deformation of the actuator element. A guide mechanism guides turning of the driven body about a turning axis coaxial with the actuator axis such that torsional deformation of the actuator element is directly transferred to the turning of the driven body.Type: GrantFiled: September 18, 2019Date of Patent: May 11, 2021Assignee: DENSO CORPORATIONInventors: Takuma Yamauchi, Seiichiro Washino, Eitaro Tanaka
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Publication number: 20200011305Abstract: A movable device includes an actuator element that deforms about an actuator axis in response to increase or decrease in energy of the actuator element. A driven body is coupled to the actuator element on the actuator axis and turned by deformation of the actuator element. A guide mechanism guides turning of the driven body about a turning axis coaxial with the actuator axis such that torsional deformation of the actuator element is directly transferred to the turning of the driven body.Type: ApplicationFiled: September 18, 2019Publication date: January 9, 2020Inventors: Takuma YAMAUCHI, Seiichiro WASHINO, Eitaro TANAKA
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Publication number: 20190214924Abstract: An actuator device includes an actuator member, a drive subject, a drive device, and a tension applicator. The actuator member is configured to be deformed in response to application of energy to the actuator member from an outside of the actuator member. The drive subject is coupled to the actuator member. The drive device is configured to apply the energy to the actuator member and thereby displace the drive subject in a deforming direction of the actuator member. The tension applicator is configured to apply the actuator member a tension, which enables correction of a tension change generated by at least one of elongation and contraction of the actuator member that is induced by natural deformation of the actuator member.Type: ApplicationFiled: March 13, 2019Publication date: July 11, 2019Inventors: Takuma YAMAUCHI, Eitaro TANAKA, Haruhiko WATANABE, Goro UEDA, Seiichiro WASHINO
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Patent number: 9200545Abstract: A torque control device includes a seal structure sealing a clearance between a hollow object and a rotation shaft. The seal structure includes a particle seal, a liquid seal, an intermediate fluid which fills a middle chamber defined between the particle seal and the liquid seal, and a coating film having a hardness higher than that of magnetic particle. The coating film is arranged to at least at a seal perimeter part of the rotation shaft, and a seal gap is defined between the particle seal and the seal perimeter part.Type: GrantFiled: August 14, 2014Date of Patent: December 1, 2015Assignee: DENSO CORPORATIONInventors: Seiichiro Washino, Takashi Furukawa
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Publication number: 20150059674Abstract: A torque control device includes a seal structure sealing a clearance between a hollow object and a rotation shaft. The seal structure includes a particle seal, a liquid seal, an intermediate fluid which fills a middle chamber defined between the particle seal and the liquid seal, and a coating film having a hardness higher than that of magnetic particle. The coating film is arranged to at least at a seal perimeter part of the rotation shaft, and a seal gap is defined between the particle seal and the seal perimeter part.Type: ApplicationFiled: August 14, 2014Publication date: March 5, 2015Inventors: Seiichiro WASHINO, Takashi FURUKAWA
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Patent number: 8627794Abstract: A fluid brake device has a case defining a fluid chamber. Magneto-rheological fluid is contained in the fluid chamber. A brake member is rotatably supported on the case and receives a braking torque according to the viscosity of the magneto-rheological fluid. The device has a movable member driven by a thermo-sensitive wax so that a volume of the fluid chamber is increased as the temperature in the fluid chamber is increased. The movable member is driven to maintain a pressure in the fluid chamber within an allowable range when the temperature in the fluid chamber is changed.Type: GrantFiled: May 16, 2012Date of Patent: January 14, 2014Assignee: Denso CorporationInventors: Shuhei Oe, Kuniaki Oka, Makoto Otsubo, Jun Yamada, Kenichi Nara, Seiichiro Washino
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Publication number: 20120291732Abstract: A fluid brake device has a case defining a fluid chamber. Magneto-rheological fluid is contained in the fluid chamber. A brake member is rotatably supported on the case and receives a braking torque according to the viscosity of the magneto-rheological fluid. The device has a movable member driven by a thermo-sensitive wax so that a volume of the fluid chamber is increased as the temperature in the fluid chamber is increased. The movable member is driven to maintain a pressure in the fluid chamber within an allowable range when the temperature in the fluid chamber is changed.Type: ApplicationFiled: May 16, 2012Publication date: November 22, 2012Applicant: DENSO CORPORATIONInventors: Shuhei OE, Kuniaki Oka, Makoto Otsubo, Jun Yamada, Kenichi Nara, Seiichiro Washino
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Patent number: 7525270Abstract: A motor control apparatus for controlling a motor with reduced noise and vibration includes a detecting means for detecting a rotational speed of the motor, a command signal processing means that generates a command signal for allowing the motor to rotate at a predetermined rotational speed, a drive means that generates a drive signal based on the command signal and supplies the drive signal to the motor, and a control signal generation means that generates a control signal for allowing the motor to produce a control torque having a frequency equal to one of frequencies of noise and vibration due to the motor. The frequency of the control torque corresponds to at least one of orders of the rotational speed detected by the detecting means. The command signal processing means generates the command signal based on the control signal.Type: GrantFiled: June 22, 2006Date of Patent: April 28, 2009Assignee: DENSO CORPORATIONInventors: Seiichiro Washino, Masaru Kamiya, Koji Sakai, Junichi Semura
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Publication number: 20060290305Abstract: A motor control apparatus for controlling a motor with reduced noise and vibration includes a detecting means for detecting a rotational speed of the motor, a command signal processing means that generates a command signal for allowing the motor to rotate at a predetermined rotational speed, a drive means that generates a drive signal based on the command signal and supplies the drive signal to the motor, and a control signal generation means that generates a control signal for allowing the motor to produce a control torque having a frequency equal to one of frequencies of noise and vibration due to the motor. The frequency of the control torque corresponds to at least one of orders of the rotational speed detected by the detecting means. The command signal processing means generates the command signal based on the control signal.Type: ApplicationFiled: June 22, 2006Publication date: December 28, 2006Applicant: DENSO CORPORATIONInventors: Seiichiro Washino, Masaru Kamiya, Koji Sakai, Junichi Semura