Patents by Inventor Masahiro Amagasa
Masahiro Amagasa 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: 20240123943Abstract: A motor control device includes a driving control part and an upper limit value setting part. The driving control part controls motor driving by switching between a first driving mode and a second driving mode, and controls an output duty ratio so as not to exceed a duty ratio upper limit value. The upper limit value setting part sets, as the duty ratio upper limit value, a low rotation duty ratio upper limit value, a maximum duty ratio upper limit value corresponding to a maximum output value, and an upper limit value of a transition period from the low rotation duty ratio upper limit value to the maximum duty ratio upper limit value, and changes slope information indicating a change amount in the upper limit value of the transition period according to the driving mode when switching between the first driving mode and the second driving mode.Type: ApplicationFiled: June 1, 2023Publication date: April 18, 2024Applicant: MITSUBA CorporationInventors: Ryo OHORI, Toshiyuki AMAGASA, Masahiro YAMADA, Atsushi MOCHIDA, Tamotsu IWAZAKI
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Publication number: 20240106377Abstract: A motor control device which controls a motor having an output shaft includes a vehicle speed detection part and a driving control part. The vehicle speed detection part detects a vehicle speed, which is a traveling speed of a vehicle mounted with the motor. Based on the vehicle speed detected by the vehicle speed detection part, the driving control part performs control of switching between a first driving mode which drives the motor, and a second driving mode in which a number of revolutions of the output shaft and an output of the motor are higher than in the first driving mode.Type: ApplicationFiled: June 18, 2023Publication date: March 28, 2024Applicant: MITSUBA CorporationInventors: RYO OHORI, TOSHIYUKI AMAGASA, MASAHIRO YAMADA, ATSUSHI MOCHIDA, TAMOTSU IWAZAKI
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Publication number: 20110130063Abstract: Provided are a spinning apparatus capable of stably spinning fibers having a small fiber diameter with a high productivity, an apparatus comprising the same for manufacturing a nonwoven fabric, a process for manufacturing a nonwoven fabric using the nonwoven fabric manufacturing apparatus, and a nonwoven fabric produced by the process. The spinning apparatus of the present invention comprises one or more exits for extruding liquid, which are capable of extruding a spinning liquid, and one or more exits for ejecting gas, which extend linearly and are located upstream of each of the exits for extruding liquid and which are capable of ejecting a gas, wherein a shearing force by the gas and its accompanying airstream can be single-linearly exerted on the spinning liquid extruded. The apparatus of the present invention for manufacturing a nonwoven fabric comprises a fibers collection means as well as the spinning apparatus.Type: ApplicationFiled: November 24, 2010Publication date: June 2, 2011Applicant: JAPAN VILENE COMPANY, LTD.Inventors: Yasuko MATSUBAYASHI, Masahiro AMAGASA, Yukio KOJIMA, Kenji KIMURA
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Patent number: 7951313Abstract: A spinning apparatus comprising one or more exits for extruding liquid, and an exit for ejecting gas, located upstream of the exits for extruding liquid, wherein the apparatus comprises a columnar hollow for liquid, in which the exit for extruding liquid forms one end of the columnar hollow; the apparatus comprises a columnar hollow for gas having the exit for ejecting gas; a virtual column for liquid, extended from the columnar hollow for liquid, is adjacent to a virtual column for gas, extended from the columnar hollow for gas; the central axis of the columnar hollow for liquid is parallel to the central axis of the columnar hollow for gas; and there exists only one straight line having the shortest distance between an outer boundary of the cross-section of the columnar hollow for gas and an outer boundary of the cross-section of the columnar hollow for liquid, is disclosed.Type: GrantFiled: May 27, 2009Date of Patent: May 31, 2011Assignee: Japan Vilene Company, Ltd.Inventors: Yasuko Matsubayashi, Masahiro Amagasa, Yukio Kojima, Syuichi Murata
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Patent number: 7780883Abstract: A method of producing fibrous aggregate, comprising: a supplying and discharging step in which a fiberizable liquid is supplied from a means for storing a fiberizable liquid to a means for discharging a fiberizable liquid via a supplying pipe, and the fiberizable liquid is discharged from the discharging means; and a fibers-collecting step in which fibers drawn and fiberized by applying an electrical field to the discharged fiberizable liquid are accumulated directly on a collecting surface of a collector while the collecting surface is unidirectionally conveyed to form the fibrous aggregate; wherein the discharging means is carried on a support capable of moving along an endless track capable of rotationally travelling between a pair of rotating shafts, and the fiberizable liquid is discharged from the discharging means while the support is revolved at a constant velocity under the condition that a moving direction of a linear motion area in the endless track conforms to a width direction of the collectingType: GrantFiled: September 19, 2005Date of Patent: August 24, 2010Assignee: Japan Vilene Company, Ltd.Inventors: Masahiro Amagasa, Yukio Kojima, Masaaki Kawabe
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Publication number: 20090295014Abstract: A spinning apparatus comprising one or more exits for extruding liquid, and an exit for ejecting gas, located upstream of the exits for extruding liquid, wherein the apparatus comprises a columnar hollow for liquid, in which the exit for extruding liquid forms one end of the columnar hollow; the apparatus comprises a columnar hollow for gas having the exit for ejecting gas; a virtual column for liquid, extended from the columnar hollow for liquid, is adjacent to a virtual column for gas, extended from the columnar hollow for gas; the central axis of the columnar hollow for liquid is parallel to the central axis of the columnar hollow for gas; and there exists only one straight line having the shortest distance between an outer boundary of the cross-section of the columnar hollow for gas and an outer boundary of the cross-section of the columnar hollow for liquid, is disclosed.Type: ApplicationFiled: May 27, 2009Publication date: December 3, 2009Applicant: JAPAN VILENE COMPANY, LTD.Inventors: Yasuko MATSUBAYASHI, Masahiro AMAGASA, Yukio KOJIMA, Syuichi MURATA
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Patent number: 7616428Abstract: A separator for an electric double layer capacitor, characterized in that a thickness of the entire separator is 25 ?m or less, a layer of an ultrafine fibrous aggregate prepared by an electrostatic spinning process is contained, an average fiber diameter of ultrafine fibers constituting the ultrafine fibrous aggregate layer is 1 ?m or less, and a maximum pore size of the ultrafine fibrous aggregate is not more than 3 times a mean flow pore size is disclosed.Type: GrantFiled: November 1, 2005Date of Patent: November 10, 2009Assignee: Japan Vilene Company, Ltd.Inventors: Takeshi Kobayashi, Masaaki Kawabe, Fuminori Kimura, Masahiro Amagasa
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Publication number: 20070247785Abstract: A separator for an electric double layer capacitor, characterized in that a thickness of the entire separator is 25 ?m or less, a layer of an ultrafine fibrous aggregate prepared by an electrostatic spinning process is contained, an average fiber diameter of ultrafine fibers constituting the ultrafine fibrous aggregate layer is 1 ?m or less, and a maximum pore size of the ultrafine fibrous aggregate is not more than 3 times a mean flow pore size is disclosed.Type: ApplicationFiled: November 1, 2005Publication date: October 25, 2007Applicant: Japan Vilene Company, Ltd.Inventors: Takeshi Kobayashi, Masaaki Kawabe, Fuminori Kimura, Masahiro Amagasa
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Publication number: 20060060999Abstract: A method of producing fibrous aggregate, comprising: a supplying and discharging step in which a fiberizable liquid is supplied from a means for storing a fiberizable liquid to a means for discharging a fiberizable liquid via a supplying pipe, and the fiberizable liquid is discharged from the discharging means; and a fibers-collecting step in which fibers drawn and fiberized by applying an electrical field to the discharged fiberizable liquid are accumulated directly on a collecting surface of a collector while the collecting surface is unidirectionally conveyed to form the fibrous aggregate; wherein the discharging means is carried on a support capable of moving along an endless track capable of rotationally travelling between a pair of rotating shafts, and the fiberizable liquid is discharged from the discharging means while the support is revolved at a constant velocity under the condition that a moving direction of a linear motion area in the endless track conforms to a width direction of the collecting sType: ApplicationFiled: September 19, 2005Publication date: March 23, 2006Applicant: Japan Vilene Company, LTDInventors: Masahiro Amagasa, Yukio Kojima, Masaaki Kawabe