Patents by Inventor Ryuta Sato
Ryuta Sato 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: 20240082965Abstract: A piston ring installation jig is to be used when installing a piston ring having a ring gap in a ring groove formed in an outer peripheral surface of a piston. The piston ring installation jig includes a main body including a groove. The main body has in a semi-cylindrical shape surrounding the outer peripheral surface of the piston. The groove has a substantially semicircular arc shape, and is formed in an inner peripheral surface of the main body in a region corresponding to the ring groove of the piston. A portion of the piston ring in a circumferential direction is inserted into the groove. The groove has a shape of an arc of a circle which has a circle center biased more to an outer peripheral side of the main body than a circle center of an inner peripheral surface of the main body.Type: ApplicationFiled: August 23, 2023Publication date: March 14, 2024Applicant: SUBARU CORPORATIONInventors: Atsushi TANAKA, Manabu SATO, Toshihiko FURUKAWA, Nanaka HOSODA, Ryuta SHINOHARA, Tomoki KAJIKAWA
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Patent number: 11669651Abstract: In the design of a mechanical component for a mechanical device driven by a feedback controlled electric motor, the user is enabled to easily know how the properties of mechanical component affect the generation of abnormal vibrations of the mechanical device. In a design assist apparatus (1), the processor (11) is configured to set a plurality of parameters of a mathematical model of an analysis target component selected from one or more mechanical components (24, 56, 58) forming the mechanical device, compute a pole of a transfer function of the mechanical device associated with one or more vibration modes of the mechanical device according to the parameters, and create a stability determination diagram including an isoline of a real part of the pole of the transfer function.Type: GrantFiled: December 17, 2018Date of Patent: June 6, 2023Assignees: MIKI PULLEY CO., LTD, NATIONAL UNIVERSITY CORPORATION KOBE UNIVERSITYInventors: Ryuta Sato, Atsushi Nagao, Takeshi Hashimoto, Taichi Sasaki
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Patent number: 11507051Abstract: A parameter indicating a surface property of an object surface is plotted on the horizontal axis, a normal direction change rate of the shape of the object surface is plotted on the vertical axis, the minimum normal direction change rate visible to a person is associated with the parameter indicating the surface property of the object surface to create a visible area map, the relationship between the parameter indicating the surface property of a machining surface of a workpiece, and the maximum value of the normal direction change rate of the shape of the machining surface of the workpiece is displayed on the visible area map, and the object surface is evaluated.Type: GrantFiled: February 5, 2018Date of Patent: November 22, 2022Assignee: MAKINO MILLING MACHINE CO., LTD.Inventors: Ryuta Sato, Takumi Nakanishi, Mitsunari Oda, Nobu Nakayama
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Publication number: 20220278638Abstract: To provide a characteristic evaluation device that can properly evaluate a characteristic of a shaft coupling while considering a delay in a response of a motor, a characteristic evaluation device of a shaft coupling includes: a motor system including a drive motor, a rotation angle sensor configured to acquire a rotation angle of a drive shaft, and a motor control unit configured to control the drive motor based on a torque command; a rotational load connected to a driven shaft; and a processor configured to output the torque command and calculate a frequency response of a gain of an amplitude of an angular velocity ? of the rotation angle, wherein the processor is configured to calculate a characteristic of the shaft coupling based on a response characteristic of the motor system and the frequency response.Type: ApplicationFiled: August 7, 2020Publication date: September 1, 2022Inventors: Ryuta SATO, Makoto TANIYAMA, Masaharu HIROSAWA, Takayuki SATOMI, Taichi SASAKI
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Publication number: 20210012043Abstract: In the design of a mechanical component for a mechanical device driven by a feedback controlled electric motor, the user is enabled to easily know how the properties of mechanical component affect the generation of abnormal vibrations of the mechanical device. In a design assist apparatus (1), the processor (11) is configured to set a plurality of parameters of a mathematical model of an analysis target component selected from one or more mechanical components (24, 56, 58) forming the mechanical device, compute a pole of a transfer function of the mechanical device associated with one or more vibration modes of the mechanical device according to the parameters, and create a stability determination diagram including an isoline of a real part of the pole of the transfer function.Type: ApplicationFiled: December 17, 2018Publication date: January 14, 2021Inventors: Ryuta Sato, Atsushi Nagao, Takeshi Hashimoto, Taichi Sasaki
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Patent number: 10788812Abstract: In the present invention: a plurality of meshes are defined on an object surface; the luminance of the object surface when the object surface is viewed from a viewpoint position is calculated for each of the plurality of meshes on the basis of data concerning a processed shape, a surface roughness curve, the viewpoint position, the direction, angle distribution, and intensity of incident light onto the object surface, and a reflectance and scattering characteristics for each wavelength on the object surface; the shape of the object surface is displayed on the basis of the luminances; and data concerning at least the object shape or the surface roughness curve is corrected so as to obtain a desired appearance of the object surface.Type: GrantFiled: February 28, 2017Date of Patent: September 29, 2020Assignees: NATIONAL UNIVERSITY CORPORATION KOBE UNIVERSITY, MAKINO MILLING MACHINE CO., LTD.Inventors: Ryuta Sato, Takumi Nakanishi, Mitsunari Oda, Nobu Nakayama
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Patent number: 10775166Abstract: A shape evaluation method includes a shape error calculation step that calculates a shape error, which is an error between a designed shape and a shape to be evaluated, and a visible error detection step that detects visible shape errors on the basis of the shape error and predetermined visual characteristic data.Type: GrantFiled: February 2, 2016Date of Patent: September 15, 2020Assignees: NATIONAL UNIVERSITY CORPORATION KOBE UNIVERSITY, MAKINO MILLING MACHINE CO., LTD.Inventors: Ryuta Sato, Yuki Sato, Mitsunari Oda, Nobu Nakayama
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Publication number: 20200192333Abstract: A parameter indicating a surface property of an object surface is plotted on the horizontal axis, a normal direction change rate of the shape of the object surface is plotted on the vertical axis, the minimum normal direction change rate visible to a person is associated with the parameter indicating the surface property of the object surface to create a visible area map, the relationship between the parameter indicating the surface property of a machining surface of a workpiece, and the maximum value of the normal direction change rate of the shape of the machining surface of the workpiece is displayed on the visible area map, and the object surface is evaluated.Type: ApplicationFiled: February 5, 2018Publication date: June 18, 2020Inventors: Ryuta SATO, Takumi NAKANISHI, Mitsunari ODA, Nobu NAKAYAMA
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Publication number: 20190361424Abstract: In this motion evaluation method, which uses a circular motion test to evaluate motion characteristics of a numerically controlled machine tool, a normal direction change rate of a trajectory is calculated from a circular motion trajectory, the normal direction change rate of the trajectory is displayed in polar coordinates, and the motion characteristics of the numerically controlled machine tool are evaluated.Type: ApplicationFiled: February 5, 2018Publication date: November 28, 2019Applicants: NATIONAL UNIVERSITY CORPORATION KOBE UNIVERSITY, MAKINO MILLING MACHINE CO., LTD.Inventors: Ryuta SATO, Takumi NAKANISHI, Mitsunari ODA, Nobu NAKAYAMA
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Publication number: 20190064771Abstract: In the present invention: a plurality of meshes are defined on an object surface; the luminance of the object surface when the object surface is viewed from a viewpoint position is calculated for each of the plurality of meshes on the basis of data concerning a processed shape, a surface roughness curve, the viewpoint position, the direction, angle distribution, and intensity of incident light onto the object surface, and a reflectance and scattering characteristics for each wavelength on the object surface; the shape of the object surface is displayed on the basis of the luminances; and data concerning at least the object shape or the surface roughness curve is corrected so as to obtain a desired appearance of the object surface.Type: ApplicationFiled: February 28, 2017Publication date: February 28, 2019Applicants: NATIONAL UNIVERSITY CORPORATION KOBE UNIVERSITY, MAKINO MILLING MACHINE CO., LTD.Inventors: Ryuta SATO, Takumi NAKANISHI, Mitsunari ODA, Nobu NAKAYAMA
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Patent number: 9920133Abstract: Monoclonal antibodies against human and mouse tissue factor, and fragments thereof, are disclosed, as well as pharmaceutical compositions and compositions for drug delivery containing the same. Therapeutic methods using the same are also disclosed.Type: GrantFiled: February 3, 2015Date of Patent: March 20, 2018Assignees: NATIONAL CANCER CENTER, The University of Tokyo, RIKEN, NanoCarrier Co., Ltd.Inventors: Yasuhiro Matsumura, Masahiro Yasunaga, Yoshikatsu Koga, Yoshiyuki Yamamoto, Ryuta Sato, Ryo Tsumura, Kazunori Kataoka, Nobuhiro Nishiyama, Yutaka Miura, Shino Manabe, Yasuki Kato
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Publication number: 20170370714Abstract: A shape evaluation method according to the present invention comprises: a shape error calculation step that calculates a shape error, which is an error between a designed shape and a shape to be evaluated; and a visible error detection step that detects visible shape errors on the basis of the shape error and predetermined visual characteristic data.Type: ApplicationFiled: February 2, 2016Publication date: December 28, 2017Applicants: NATIONAL UNIVERSITY CORPORATION KOBE UNIVERSITY, MAKINO MILLING MACHINE CO., LTD.Inventors: Ryuta SATO, Yuki SATO, Mitsunari ODA, Nobu NAKAYAMA
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Publication number: 20160333113Abstract: Monoclonal antibodies against human and mouse tissue factor, and fragments thereof, are disclosed, as well as pharmaceutical compositions and compositions for drug delivery containing the same. Therapeutic methods using the same are also disclosed.Type: ApplicationFiled: February 3, 2015Publication date: November 17, 2016Applicants: NATIONAL CANCER CENTER, The University of Tokyo, RIKEN, NanoCarrier Co., Ltd.Inventors: Yasuhiro MATSUMURA, Masahiro YASUNAGA, Yoshikatsu KOGA, Yoshiyuki YAMAMOTO, Ryuta SATO, Ryo TSUMURA, Kazunori KATAOKA, Nobuhiro NISHIYAMA, Yutaka MIURA, Shino MANABE, Yasuki KATO
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Patent number: 9144869Abstract: A machine motion trajectory measuring device for measuring the motion trajectory of a machine used in an apparatus which controls the position of the machine by feeding back a detected position obtained by converting the rotation angles of motors for a plurality of movable axes and then driving the motors such that the detected position follows a commanded position is provided. The machine motion trajectory measuring device includes accelerometers for measuring the acceleration of the machine; and a motion trajectory measuring unit that measures the motion trajectory of the machine by obtaining the position of the machine by integrating the acceleration twice and correcting the position of the machine such that the profile of the position of the machine coincides with the profile of the detected position or the profile of an estimated position estimated using a model for simulating the response of the position of the machine to the commanded position.Type: GrantFiled: September 10, 2009Date of Patent: September 29, 2015Assignee: Mitsubishi Electric CorporationInventors: Ryuta Sato, Kotaro Nagaoka, Tomonori Sato
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Publication number: 20130291661Abstract: An error display device is a device for displaying a translation error and an attitude error associated with a rectilinear motion of a machine element, and includes a reference-motion-trajectory display unit that displays a design motion trajectory, and an error magnification/display unit that magnifies the translation error and the attitude error and displays the magnified errors, wherein the error magnification/display unit calculates a translation error vector including a magnified translation error obtained by multiplying the translation error by a predetermined magnification factor, draws a translation error trajectory including the design motion trajectory and the translation error vector added thereto, calculates an attitude error matrix including a magnified attitude error obtained by multiplying the attitude error by a predetermined magnification factor, and draws a predetermined shape with coordinates transformed using the attitude error matrix and the translation error vector.Type: ApplicationFiled: January 26, 2011Publication date: November 7, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Ryuta Sato, Kotaro Nagaoka, Shunro Ono
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Publication number: 20130282328Abstract: The present invention has a rotation-axis geometric-deviation measuring step of measuring a position and a tilt of a rotation-axis center line by measuring a position of a point on a surface of a workpiece fixed to a rotation axis, a geometric-deviation-parameter setting step of setting a correction amount of the measured position and tilt of the rotation-axis center line in a numerical control device, a workpiece-installation-error measuring step of measuring an installation position and a tilt of the workpiece with reference to the position of the rotation-axis center line, and a workpiece-installation-error parameter setting step of setting the measured installation position and tilt of the workpiece in the numerical control device, and accordingly enables measurement of a position and a tilt of the rotation axis center by measuring the position of a point on the workpiece surface in a state where the workpiece is fixed to the rotation axis.Type: ApplicationFiled: January 24, 2011Publication date: October 24, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Ryuta Sato, Yukihiro Iuchi, Shunro Ono
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Publication number: 20120323373Abstract: A numerical control device including: a linear axis dependent position correction amount calculating unit which calculates a position correction amount of the linear axis from a translation error and an attitude error dependent on movement of the linear axis; a rotary axis dependent position correction amount calculating unit which calculates a position correction amount of the linear axis from a translation error and an attitude error dependent on movement of the rotary axis; a rotary axis angle correction amount calculating unit which calculates an angle correction amount of the rotary axis from a part of the attitude error dependent on movement of the linear axis and a part of the attitude error dependent on movement of the rotary axis; and a position addition correction amount calculating unit which calculates a position correction amount of the linear axis corresponding to the rotary axis correction amount.Type: ApplicationFiled: February 25, 2010Publication date: December 20, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Ryuta Sato, Shunro Ono, Naoki Nakamura, Daisuke Fujino
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Publication number: 20110246132Abstract: A machine motion trajectory measuring device for measuring the motion trajectory of a machine used in an apparatus which controls the position of the machine by feeding back a detected position obtained by converting the rotation angles of motors for a plurality of movable axes and then driving the motors such that the detected position follows a commanded position is provided. The machine motion trajectory measuring device includes accelerometers for measuring the acceleration of the machine; and a motion trajectory measuring unit that measures the motion trajectory of the machine by obtaining the position of the machine by integrating the acceleration twice and correcting the position of the machine such that the profile of the position of the machine coincides with the profile of the detected position or the profile of an estimated position estimated using a model for simulating the response of the position of the machine to the commanded position.Type: ApplicationFiled: September 10, 2009Publication date: October 6, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Ryuta Sato, Kotaro Nagaoka, Tomonori Sato