Patents by Inventor Eisei In

Eisei In 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: 20250067621
    Abstract: An electrodynamic vibration testing system for shaking a specimen comprises a fixed section, a movable section which can reciprocate in a predetermined direction with respect to the fixed section, a voice coil motor for driving the movable section, a table attached to the movable section for fixing the specimen, an air spring which supports the movable section to the fixed section from below, and a reaction plate attached to the fixed section for sandwiching the specimen between the table, and the reaction plate.
    Type: Application
    Filed: July 28, 2022
    Publication date: February 27, 2025
    Inventors: Eisei In, Kohei Hizono
  • Publication number: 20250020538
    Abstract: To provide a characteristic measuring device capable of smoothly switch switching between a floating-mass state and a fixed state, while a predetermined pre-load is maintained. In a characteristic measuring device, a support part includes an air spring and a double fastening mechanism each arranged between a middle surface plate and a reaction-force section, the double fastening mechanism includes a first actuator fixed to the reaction-force section and a second actuator fixed to the middle surface plate, and the reaction-force section is not supported in the floating-mass state and is supported in the fixed state by the first actuator and the second actuator. In this way, a problem of the prior art (pre-load variation) is eliminated, and switching between the floating-mass state and the fixed state can be smoothly achieved.
    Type: Application
    Filed: July 26, 2022
    Publication date: January 16, 2025
    Inventors: Eisei In, Kohei Hizono
  • Patent number: 11828410
    Abstract: An object of the present invention is to provide an actuator capable of reducing a shock in acceleration at the time of a turn caused by a load in a lateral direction orthogonal to an axis of the actuator even when the load is excessive while reducing manufacturing cost and manufacturing man-hours, and a tripod structure including the actuator. An actuator according to the present invention includes: a pipe; a ball screw used as a feed screw; a conversion nut used as a feed nut and screwed with the ball screw; a piston fixed integrally to the conversion nut and driven to expand and contract from a free end which is one end of the pipe; and a rolling bearing unit being provided on a tip of the free end of the pipe and including a plurality of roller followers holding the piston movably.
    Type: Grant
    Filed: June 22, 2020
    Date of Patent: November 28, 2023
    Assignee: SAGINOMIYA SEISAKUSHO, INC.
    Inventors: Eisei In, Tomonori Uchida
  • Patent number: 11610503
    Abstract: An actuator includes a cylinder sandwiched between a fixing plate fixed to the other end surface of a supporting plate together with a servomotor and a bearing housing, a ball screw shaft having one end protruding into the cylinder through through holes of the fixing plate, a slide block screwed with one end of the ball screw shaft in the cylinder, a cylindrical-shaped piston coupled to an end of the slide block and reciprocatably located in the cylinder, linear motion bearing units located inside the bearing housing to movably support the piston, and linear motion bearing units located in the cylinder to movably support the slide block.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: March 21, 2023
    Assignee: SAGINOMIYA SEISAKUSHO, INC.
    Inventors: Eisei In, Tomonori Uchida
  • Publication number: 20220268344
    Abstract: An actuator includes a cylinder sandwiched between a fixing plate fixed to the other end surface of a supporting plate together with a servomotor and a bearing housing, a ball screw shaft having one end protruding into the cylinder through through holes of the fixing plate, a slide block screwed with one end of the ball screw shaft in the cylinder, a cylindrical-shaped piston coupled to an end of the slide block and reciprocatably located in the cylinder, linear motion bearing units located inside the bearing housing to movably support the piston, and linear motion bearing units located in the cylinder to movably support the slide block.
    Type: Application
    Filed: July 15, 2020
    Publication date: August 25, 2022
    Inventors: Eisei In, Tomonori Uchida
  • Publication number: 20220252210
    Abstract: An object of the present invention is to provide an actuator capable of reducing a shock in acceleration at the time of a turn caused by a load in a lateral direction orthogonal to an axis of the actuator even when the load is excessive while reducing manufacturing cost and manufacturing man-hours, and a tripod structure including the actuator. An actuator according to the present invention includes: a pipe; a ball screw used as a feed screw; a conversion nut used as a feed nut and screwed with the ball screw; a piston fixed integrally to the conversion nut and driven to expand and contract from a free end which is one end of the pipe; and a rolling bearing unit being provided on a tip of the free end of the pipe and including a plurality of roller followers holding the piston movably.
    Type: Application
    Filed: June 22, 2020
    Publication date: August 11, 2022
    Inventors: Eisei In, Tomonori Uchida
  • Patent number: 11280697
    Abstract: An object of the present invention is to provide a dynamic characteristic measurement device capable of accurately measuring dynamic vibration characteristics of a rubber isolator and the like in a high-frequency vibration range. A dynamic characteristic measurement device according to the present invention includes a base, a support part that is placed above the base so as to be capable of floating via an air spring, an electrodynamic vibrator that is provided on the base side of an object under test mounted between the base and the support part and vibrates the object under test, and a load washer that is provided on the support part side of the object under test and measures a dynamic load applied to the object under test. Here, a crosshead of the support part is shaped such that a resonant frequency is at least 3 kHz.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: March 22, 2022
    Assignee: Saginomiya Seisakusho, Inc.
    Inventors: Eisei In, Kohei Hizono
  • Publication number: 20210389208
    Abstract: An object of the present invention is to provide a dynamic characteristic measurement device capable of accurately measuring dynamic vibration characteristics of a rubber isolator and the like in a high-frequency vibration range. A dynamic characteristic measurement device according to the present invention includes a base, a support part that is placed above the base so as to be capable of floating via an air spring, an electrodynamic vibrator that is provided on the base side of an object under test mounted between the base and the support part and vibrates the object under test, and a load washer that is provided on the support part side of the object under test and measures a dynamic load applied to the object under test. Here, a crosshead of the support part is shaped such that a resonant frequency is at least 3 kHz.
    Type: Application
    Filed: September 12, 2019
    Publication date: December 16, 2021
    Inventors: Eisei In, Kohei Hizono
  • Patent number: 9666094
    Abstract: A test device includes a base plate configured to move on a slipping floor in X-Y directions substantially parallel to the slipping floor by an air bearing, and rotate around an axis substantially perpendicular to the slipping floor, and a platform connected to the base plate by a movement connecting mechanism. The base plate is between the slipping floor and the platform. The movement mechanism connected pivotally with the base plate is configured to move on the slipping floor in the X-Y directions, and rotate around the axis. When the base plate is at substantially a center of the slipping floor's upper surface, the tips of the movement mechanism are directed to points on a circle C or points close to C, and a central angle between a line from C's center to one of the tips and a line from C's center to another tip is 120°.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: May 30, 2017
    Assignee: KABUSHIKI KAISHA SAGINOMIYA SEISAKUSHO
    Inventors: Eisei In, Tomohiro Hosaka
  • Patent number: 9666093
    Abstract: A test device includes a base plate configured to move on a slipping floor in X-Y directions by an air bearing, and rotate around a Z axis, a platform connected on the base plate by a movement connecting mechanism, and a magnetizing device disposed on a lower surface of the base plate to face the slipping floor and configured to change a magnetizing force to the slipping floor. The X-Y directions are substantially parallel to the slipping floor, and the Z axis is substantially perpendicular to the slipping floor. The base plate is disposed between the slipping floor and the platform. A magnetizing force of the magnetizing device to the slipping floor when the air bearing operates is stronger than magnetizing force of the magnetizing device to the slipping floor when the air bearing does not operate.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: May 30, 2017
    Assignee: KABUSHIKI KAISHA SAGINOMIYA SEISAKUSHO
    Inventors: Eisei In, Ryotaro Masuyama
  • Publication number: 20150323415
    Abstract: [Problem] The invention is to provide a test device, that the simulation is possible, in which the angle and the range of the velocity in the direction of Yaw are large, and in which the torque in the direction of Yaw is large, and the range of the accelerated velocity is large, and moreover, in which necessary space is small and in which the test up to a high frequency is possible by small power and in a small space.
    Type: Application
    Filed: September 5, 2013
    Publication date: November 12, 2015
    Applicant: Kabushiki Kaisha Saginomiya Seisakusho
    Inventors: Eisei IN, Tomohiro HOSAKA
  • Publication number: 20150323414
    Abstract: [Problem] The invention is to provide a test device, in which the weight of the platform that is the moving part is light, and the rigidity is high, and in which a movement steady with a light base can be achieved, and in which the simulation up to a high frequency is possible by small power and in a small space, and in which it is cheap and compact.
    Type: Application
    Filed: September 5, 2013
    Publication date: November 12, 2015
    Inventors: Eisei In, Ryotaro Masuyama
  • Patent number: D969646
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: November 15, 2022
    Assignee: SAGINOMIYA SEISAKUSHO, INC.
    Inventors: Eisei In, Tomonori Uchida, Tomohiro Hosaka