Patents by Inventor Hiromitsu Takeuchi
Hiromitsu Takeuchi 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).
-
Publication number: 20220315741Abstract: A rubber composition in which a diene rubber containing hydroxyl groups and a polyrotaxane containing a hydrocarbon-modified cyclodextrin as cyclic molecules are urethane-crosslinked by an isocyanate that is a crosslinking agent.Type: ApplicationFiled: March 8, 2022Publication date: October 6, 2022Inventors: Takanori NAKAI, Hideki TAMAI, Hiromitsu TAKEUCHI, Makoto ISHIDA, Hideyuki IMAI, Katsunari INOUE
-
Patent number: 10302959Abstract: An optical device includes: a piezoelectric element of a sheet shape; a restriction section attached to the piezoelectric element, the restriction section configured to restrict a movable area in the piezoelectric element to a polygonal predetermined region; an optical element attached to the movable area of the piezoelectric element; and a plurality of electrodes disposed on the piezoelectric element, the plurality of electrodes configured to be applied with voltage independently, wherein: the electrodes are disposed at adjacent two comers in the movable area; and the piezoelectric element expands and contracts based on voltage applied to the electrodes in a manner that a periphery of the corner where the electrode is disposed in the movable area expands and contracts in multiple directions including two directions along two sides forming the corner.Type: GrantFiled: June 22, 2017Date of Patent: May 28, 2019Assignee: TOYODA GOSEI CO., LTD.Inventors: Kazumasa Baba, Hiromitsu Takeuchi
-
Patent number: 10288895Abstract: An optical device includes: an optical element; a housing unit configured to accommodate the optical element; a support part configured to pivotally support the optical element to be tiltable with respect to the housing unit; a piezoelectric element configured to connect the optical element and the housing unit to each other; and an electrode arranged at the piezoelectric element.Type: GrantFiled: June 23, 2017Date of Patent: May 14, 2019Assignee: TOYODA GOSEI CO., LTD.Inventors: Kazumasa Baba, Hiromitsu Takeuchi, Yuji Yonehara
-
Patent number: 10273364Abstract: A composition includes a polyrotaxane (A) which includes cyclodextrin as a ring molecule and polyethylene glycol as a linear molecule, and in which a blocking group is arranged at both ends of the linear molecule; a block copolymer (B) including polysiloxane; and a polymer (C) including no polysiloxane.Type: GrantFiled: September 20, 2016Date of Patent: April 30, 2019Assignees: TOYODA GOSEI CO., LTD., ADVANCED SOFTMATERIALS INC.Inventors: Takanori Nakai, Hiromitsu Takeuchi, Katsunari Inoue
-
Publication number: 20170371174Abstract: An optical device includes: a piezoelectric element of a sheet shape; a restriction section attached to the piezoelectric element, the restriction section configured to restrict a movable area in the piezoelectric element to a polygonal predetermined region; an optical element attached to the movable area of the piezoelectric element; and a plurality of electrodes disposed on the piezoelectric element, the plurality of electrodes configured to be applied with voltage independently, wherein: the electrodes are disposed at adjacent two comers in the movable area; and the piezoelectric element expands and contracts based on voltage applied to the electrodes in a manner that a periphery of the corner where the electrode is disposed in the movable area expands and contracts in multiple directions including two directions along two sides forming the corner.Type: ApplicationFiled: June 22, 2017Publication date: December 28, 2017Inventors: Kazumasa BABA, Hiromitsu TAKEUCHI
-
Publication number: 20170371175Abstract: An optical device includes: an optical element; a housing unit configured to accommodate the optical element; a support part configured to pivotally support the optical element to be tiltable with respect to the housing unit; a piezoelectric element configured to connect the optical element and the housing unit to each other; and an electrode arranged at the piezoelectric element.Type: ApplicationFiled: June 23, 2017Publication date: December 28, 2017Inventors: Kazumasa BABA, Hiromitsu TAKEUCHI, Yuji YONEHARA
-
Patent number: 9753359Abstract: A projection apparatus includes a light source to emit a light beam, an image display element to provide image information to the light beam, and a noise reduction mechanism disposed between the light source and the image display element. The noise reduction mechanism includes an optical element to transmit the light beam emitted from the light source, a dielectric elastomer fixed to the optical element, and first and second electrodes provided on first and second surfaces of the dielectric elastomer, respectively. The dielectric elastomer is deformed in accordance with the application of a voltage across the first and second electrodes to moves the optical element.Type: GrantFiled: September 28, 2015Date of Patent: September 5, 2017Assignees: CASIO COMPUTER CO., LTD., TOYODA GOSEI CO., LTD.Inventors: Naotsugu Ogura, Kazumasa Baba, Hiromitsu Takeuchi
-
Publication number: 20170096559Abstract: A composition includes a polyrotaxane (A) which includes cyclodextrin as a ring molecule and polyethylene glycol as a linear molecule, and in which a blocking group is arranged at both ends of the linear molecule; a block copolymer (B) including polysiloxane; and a polymer (C) including no polysiloxane.Type: ApplicationFiled: September 20, 2016Publication date: April 6, 2017Inventors: Takanori NAKAI, Hiromitsu TAKEUCHI, Katsunari INOUE
-
Patent number: 9585771Abstract: Finger parts flex and extend about joint sections. A wire is arranged along each finger part through the joint sections. A motor winds the wires to pull the wires in the flexing direction and cause the finger parts to flex. A polymer actuator arranged to correspond to a part of each wire is formed in an elongated shape of a polymer material and elastically deforms in response to an application of voltage and performs extension and contraction in the axial direction by being restored to the original shape in response to stoppage of the voltage application. A lock mechanism restricts relative movement between the wire and the motor after the wire has been wound up by the motor. The polymer actuator performs extension and contraction while relative movement is restricted by the lock mechanism, thereby pulling the wire in the flexing direction.Type: GrantFiled: October 11, 2013Date of Patent: March 7, 2017Assignee: TOYODA GOSEI CO., LTD.Inventors: Kazumasa Baba, Hiromitsu Takeuchi
-
Publication number: 20160091728Abstract: A projection apparatus includes a light source to emit a light beam, an image display element to provide image information to the light beam, and a noise reduction mechanism disposed between the light source and the image display element. The noise reduction mechanism includes an optical element to transmit the light beam emitted from the light source, a dielectric elastomer fixed to the optical element, and first and second electrodes provided on first and second surfaces of the dielectric elastomer, respectively. The dielectric elastomer is deformed in accordance with the application of a voltage across the first and second electrodes to moves the optical element.Type: ApplicationFiled: September 28, 2015Publication date: March 31, 2016Applicants: TOYODA GOSEI CO., LTD., CASIO COMPUTER CO., LTD.Inventors: Naotsugu OGURA, Kazumasa BABA, Hiromitsu TAKEUCHI
-
Patent number: 9230418Abstract: A portable device includes a case having wall portions, a battery arranged within the case, and a polymer membrane arranged between at least one of the wall portions and the battery. The polymer membrane couples the battery to the at least one of the wall portions. The polymer membrane has a property of elastically changing at least one of the thickness and the length in a planar direction by being deformed in response to voltage application and restoring its original shape in response to the stoppage of the voltage application. The battery is caused to reciprocate by applying a voltage that changes periodically to the polymer membrane.Type: GrantFiled: June 12, 2014Date of Patent: January 5, 2016Assignee: TOYODA GOSEI CO., LTD.Inventors: Kazumasa Baba, Hiromitsu Takeuchi, Tamotsu Sasada
-
Publication number: 20150297367Abstract: Finger parts flex and extend about joint sections. A wire is arranged along each finger part through the joint sections. A motor winds the wires to pull the wires in the flexing direction and cause the finger parts to flex. A polymer actuator arranged to correspond to a part of each wire is formed in an elongated shape of a polymer material and elastically deforms in response to an application of voltage and performs extension and contraction in the axial direction by being restored to the original shape in response to stoppage of the voltage application. A lock mechanism restricts relative movement between the wire and the motor after the wire has been wound up by the motor. The polymer actuator performs extension and contraction while relative movement is restricted by the lock mechanism, thereby pulling the wire in the flexing direction.Type: ApplicationFiled: October 11, 2013Publication date: October 22, 2015Applicant: TOYODA GOSEI CO., LTD.Inventors: Kazumasa BABA, Hiromitsu TAKEUCHI
-
Patent number: 9071170Abstract: A movable side mounting portion transmits extension and contraction of a polymer actuator to an electric prosthetic hand. The polymer actuator deforms elastically in accordance with voltage application and returns to its original shape in accordance with stoppage of voltage application. A rear end of the polymer actuator is fixed and a front end of the polymer actuator is movable. When one of a pair of electrodes of the polymer actuator is electrically connected to the fixed side mounting portion, the fixed end is fastened by a bolt to the fixed side mounting portion. Also, when the other electrode is electrically connected to the movable side mounting portion, the movable end is fastened by a bolt to the movable side mounting portion.Type: GrantFiled: January 30, 2013Date of Patent: June 30, 2015Assignee: TOYODA GOSEI CO., LTD.Inventors: Kazumasa Baba, Hiromitsu Takeuchi
-
Publication number: 20140377595Abstract: A portable device includes a case having wall portions, a battery arranged within the case, and a polymer membrane arranged between at least one of the wall portions and the battery. The polymer membrane couples the battery to the at least one of the wall portions. The polymer membrane has a property of elastically changing at least one of the thickness and the length in a planar direction by being deformed in response to voltage application and restoring its original shape in response to the stoppage of the voltage application. The battery is caused to reciprocate by applying a voltage that changes periodically to the polymer membrane.Type: ApplicationFiled: June 12, 2014Publication date: December 25, 2014Inventors: Kazumasa BABA, Hiromitsu TAKEUCHI, Tamotsu SASADA
-
Patent number: 8754572Abstract: An actuator includes a sheet having dielectric elastomer layers and conductive rubber layers provided on the front and back faces of each dielectric elastomer layer. The sheet is wrapped and rolled about a coil spring. The actuator expands the rolled sheet along an expansion direction of the coil spring by applying a voltage to the conductive rubber layers on the front and back faces of the dielectric elastomer layer, and contracts the rolled sheet along a contraction direction of the coil spring by stopping the application of the voltage. The actuator further includes a fiber layer located between the coil spring and the rolled sheet wrapped about the coil spring.Type: GrantFiled: August 31, 2011Date of Patent: June 17, 2014Assignee: Toyoda Gosei Co., Ltd.Inventors: Hiromitsu Takeuchi, Takashi Maeno, Naoto Kuriyama, Takanori Nakai, Yutaka Tsuchikawa, Yoji Kimura
-
Publication number: 20130195712Abstract: There is provided a method for obtaining a pure melt in which the impurities Mn, Al, Ti, Pb, Zn, and B are removed from molten cast iron and depletion of useful C and Si is suppressed, the method wherein an excess oxygen flame having a theoretical combustion ratio of fuel and oxygen (amount of oxygen (volume)×5/amount of fuel (volume)) of 1 to 1.5 is directly exposed to the surface of pre-melted molten cast iron, the temperature of the molten cast iron is held at 1250° C. or more and less than 1500° C. while the melt surface is superheated and an acidic slag is brought into contact with the melt, and an oxygen-containing gas is injected into the interior of the molten cast iron.Type: ApplicationFiled: January 24, 2011Publication date: August 1, 2013Applicants: KIMURA CHUZOSHO CO., LTD., MIE PREFECTURE, SENSHU CORPORATION, NANIWA ROKI CO., LTD., HITACHI METALS, LTD., KINOSHITA MANUFACTORY CO., LTD.Inventors: Toshitake Kanno, Ilgoo Kang, Takao Fujikawa, Hiromitsu Takeuchi, Kiyoshi Kinoshita, Hirotoshi Murata, Nobuya Yamamoto, Tatsuo Atsumi
-
Patent number: 8458889Abstract: An actuator manufacturing method includes alternately stacking a plurality of dielectric elastomer layers and a plurality of conductive rubber layers along the direction of thickness to form a sheet, and wrapping the sheet formed about a core to form a rolled sheet. When the sheet formed in the step of alternately stacking is wrapped about the core, the sheet is formed by the dielectric elastomer layers and the conductive rubber layers. Therefore, even if the dielectric elastomer layers in the sheet are made to be thin, the thickness of the entire sheet is prevented from being excessively thin.Type: GrantFiled: August 30, 2011Date of Patent: June 11, 2013Assignee: Toyoda Gosei Co., Ltd.Inventors: Yutaka Tsuchikawa, Takashi Maeno, Naoto Kuriyama, Takanori Nakai, Hiromitsu Takeuchi, Yoji Kimura
-
Patent number: 8368284Abstract: A dielectric actuator 1 of the present invention has a structure in which an elastic, high-dielectric material portion 2 is held by elastic insulating material portions 3a and 3b and the elastic insulating material portions are held by electrodes 4a and 4b from the outside. A base material for the elastic, high-dielectric material portion 2 is formed of a silicon rubber and a graphite powder is mixed therein to apply a conductive property.Type: GrantFiled: August 25, 2009Date of Patent: February 5, 2013Assignee: Toyoda Gosei Co., Ltd.Inventors: Hiromitsu Takeuchi, Yukihisa Ueno, Naoto Kuriyama
-
Publication number: 20120074817Abstract: An actuator includes a sheet having dielectric elastomer layers and conductive rubber layers provided on the front and back faces of each dielectric elastomer layer. The sheet is wrapped and rolled about a coil spring. The actuator expands the rolled sheet along an expansion direction of the coil spring by applying a voltage to the conductive rubber layers on the front and back faces of the dielectric elastomer layer, and contracts the rolled sheet along a contraction direction of the coil spring by stopping the application of the voltage. The actuator further includes a fiber layer located between the coil spring and the rolled sheet wrapped about the coil spring.Type: ApplicationFiled: August 31, 2011Publication date: March 29, 2012Applicant: TOYODA GOSEI CO., LTD.Inventors: Hiromitsu Takeuchi, Takashi Maeno, Naoto Kuriyama, Takanori Nakai, Yutaka Tsuchikawa, Yoji Kimura
-
Publication number: 20120060355Abstract: An actuator manufacturing method includes alternately stacking a plurality of dielectric elastomer layers and a plurality of conductive rubber layers along the direction of thickness to form a sheet, and wrapping the sheet formed about a core to form a rolled sheet. When the sheet formed in the step of alternately stacking is wrapped about the core, the sheet is formed by the dielectric elastomer layers and the conductive rubber layers. Therefore, even if the dielectric elastomer layers in the sheet are made to be thin, the thickness of the entire sheet is prevented from being excessively thin.Type: ApplicationFiled: August 30, 2011Publication date: March 15, 2012Applicant: TOYODA GOSEI CO., LTD.Inventors: Yutaka Tsuchikawa, Takashi Maeno, Naoto Kuriyama, Takanori Nakai, Hiromitsu Takeuchi, Yoji Kimura