Patents by Inventor Yutaka Arakawa

Yutaka Arakawa 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: 20220380032
    Abstract: To provide an aerial vehicle that can realize ease of operation during driving. An aerial vehicle according to the present technology includes: a vehicle body extending in a front-rear direction; a saddle section provided on an upper side of the vehicle body; a grip section provided on the front side of the saddle section in the vehicle body; and a rotary wing section which is provided in the vehicle body and which generates lift and/or thrust with respect to the vehicle body; wherein an operation section for performing operations pertaining to actions relating to ascent and/or propulsion of the vehicle body is provided in the grip section.
    Type: Application
    Filed: October 8, 2019
    Publication date: December 1, 2022
    Inventors: Yasuhiro ARAKAWA, Yutaka TAKAGI, Takafumi OBA, Takeru SHIROTA, Yuki TAKIZAWA, Hiroshi NAKANO
  • Patent number: 11505010
    Abstract: A pneumatic tires includes a tread, a pair of sidewalls, and a pair of bead portions that are arranged at intervals wider than a rim width of a corresponding regular rim in a non-rim-assembled state. Each of the pair of the bead portions includes a bead base at an inner diameter side end, a bead heel, and a bead back surface extending from an outer diameter side end of the bead heel, to the outer diameter side. In the non-rim-assembled state, the bead back surface is formed with a recess that is recessed inward in the width direction. In a rim-assembled state, the bead back surface is in close contact with substantially the entire surface of a radial portion of a rim flange of a regular rim.
    Type: Grant
    Filed: April 27, 2021
    Date of Patent: November 22, 2022
    Assignee: TOYO TIRE CORPORATION
    Inventors: Koji Arakawa, Noriyuki Tsuji, Yutaka Nakamoto
  • Publication number: 20220363374
    Abstract: To provide an aerial vehicle that can improve the driving feel and riding comfort of a rider. An aerial vehicle according to the present technology includes: a vehicle body extending in the front-rear direction; a saddle section provided on an upper side of the vehicle body; a motive power section provided on an underside of the vehicle body, at a position below the saddle section; and a rotary wing section which is provided at at least one of the front and rear of the motive power section, and which rotates by using the motive power section as a motive power source.
    Type: Application
    Filed: October 8, 2019
    Publication date: November 17, 2022
    Inventors: Yasuhiro ARAKAWA, Yutaka TAKAGI, Takafumi OBA, Takeru SHIROTA, Shuhei KOMATSU
  • Patent number: 11502626
    Abstract: A piezoelectric motor includes a piezoelectric actuator, a holding member that holds the piezoelectric actuator, a housing in which the piezoelectric actuator and the holding member are placed, a first positioning pin that positions the holding member and the housing, and a first fixing part that fixes the first positioning pin. In the piezoelectric motor, the first positioning pin is fixed to one of the holding member and the housing, and a first hole portion in which the first positioning pin is placed is provided in the other of the holding member and the housing. The first fixing part fixes relative positions of the first hole portion and the first positioning pin.
    Type: Grant
    Filed: January 20, 2021
    Date of Patent: November 15, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yudai Okamae, Tomohisa Iwazaki, Yutaka Arakawa
  • Patent number: 11482661
    Abstract: A piezoelectric driving device includes a piezoelectric vibrating body and a driving circuit. The piezoelectric vibrating body includes a contact which extends in a first direction and comes into contact with a driven member, a first piezoelectric element which generates bending vibration in a direction intersecting with the first direction in accordance with a first driving voltage, and a second piezoelectric element which generates longitudinal vibration in the first direction in accordance with a second driving voltage. The piezoelectric vibrating body is configured such that a resonance frequency of the longitudinal vibration is higher than a resonance frequency of the bending vibration. The driving circuit sets a driving frequency of each of the first driving voltage and the second driving voltage to be equal to or higher than the resonance frequency of the longitudinal vibration.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: October 25, 2022
    Inventors: Kiichi Kajino, Yutaka Arakawa
  • Publication number: 20220337177
    Abstract: A piezoelectric drive device includes two vibrators having vibrating portions with piezoelectric elements and transmitting portions placed in the vibrating portions and transmitting drive forces to a driven member (e.g. a slider), and a fixing portion having through holes (first through hole, second through hole)into which pins or screws are inserted. The two vibrators are placed adjoiningly along a drive direction of the slider, and the fixing portion is placed between the two vibrators and fixing the two vibrators.
    Type: Application
    Filed: April 18, 2022
    Publication date: October 20, 2022
    Inventors: Yuichiro TSUYUKI, Yutaka ARAKAWA
  • Patent number: 11433716
    Abstract: A pneumatic tire includes a pair of bead portions that are arranged at intervals wider than a regular rim width in a non-rim-assembled state. The bead portion includes a rim protector, a bead base, a bead heel, and a bead back surface. In the non-rim-assembled state, the bead back surface is formed with a recess that is recessed inward in the tire width direction. The bead back surface has a second curved portion constituting a deepest portion of the recess and a third curved portion extending inward in the tire width direction from the rim protector. When a height of the deepest portion is H2, a height H8 of a virtual intersection of a curve obtained by extending the second curved portion and a curve obtained by extending the third curved portion is larger than 1.5 times H10 and smaller than 3.0 times H10.
    Type: Grant
    Filed: April 27, 2021
    Date of Patent: September 6, 2022
    Assignee: TOYO TIRE CORPORATION
    Inventors: Koji Arakawa, Yutaka Nakamoto, Noriyuki Tsuji
  • Publication number: 20220255469
    Abstract: A piezoelectric motor includes a driven body configured to rotate around a rotation axis, a first piezoelectric vibrator configured to transmit a driving force to the driven body, a moving mechanism configured to move the first piezoelectric vibrator in directions approaching and separating from the rotation axis, and a second piezoelectric vibrator configured to transmit a driving force to the moving mechanism. The moving mechanism includes a screw shaft disposed along the directions and configured to rotate around an axis with the driving force of the second piezoelectric vibrator and a holding section configured to screw with the screw shaft and hold the first piezoelectric vibrator.
    Type: Application
    Filed: February 8, 2022
    Publication date: August 11, 2022
    Inventors: Ryoichi TANAKA, Tomoaki TAKAHASHI, Yutaka ARAKAWA
  • Patent number: 11389952
    Abstract: A robot arm includes a distal end unit having a gripping part and a first supporting part that supports the gripping part, a first drive unit that, with an axis along a direction in which the gripping part and the first supporting part are arranged as a first axis, pivots the gripping part about a first pivot axis along the first axis relative to the first supporting part, a second supporting part that supports the first supporting part, and a second drive unit that, with an axis orthogonal to the first axis as a second axis, pivots the distal end unit about a second pivot axis along the second axis relative to the second supporting part, wherein the first drive unit includes a piezoelectric motor, and the second pivot axis crosses the distal end unit.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: July 19, 2022
    Inventors: Tomohisa Iwazaki, Yutaka Arakawa, Mitsuru Toyama
  • Patent number: 11381178
    Abstract: A piezoelectric drive device includes a rotor having a driven part and rotating around a rotation axis, a vibrating unit having a piezoelectric element and applying a drive force for rotating the rotor to the driven part by displacement of the piezoelectric element, and a bearing supporting the rotor. The driven part has a first portion, a second portion, and a third portion sequentially connected, the first portion has a predetermined region along an axial direction of the rotation axis and coupled to an inner ring of the bearing within the predetermined region, the second portion overlaps with the bearing in a plan view from the axial direction, and the third portion has a contact surface in contact with the vibrating unit at an inner side of both ends of the predetermined region in a plan view from a direction perpendicular to the axial direction.
    Type: Grant
    Filed: August 20, 2020
    Date of Patent: July 5, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Tomohisa Iwazaki, Yutaka Arakawa
  • Patent number: 11264922
    Abstract: A piezoelectric drive device includes a rotor which has an output section for outputting a rotational force and a transmission section disposed on an outer periphery of the output section, and rotates around a rotational axis, and a vibrating part which has a piezoelectric element, and rotates the rotor due to a deformation of the piezoelectric element. The transmission section has a first portion and a second portion different from each other in position in a radial direction from the output section toward the transmission section, the first portion is coupled to the output section, the second portion is higher in Young's modulus than the first portion, the second portion is higher in mass per unit volume than the first portion, and the vibrating part makes contact with the transmission section at a position overlapping the second portion in a plan view from an axial direction of the rotational axis.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: March 1, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yudai Okamae, Tomohisa Iwazaki, Yutaka Arakawa
  • Patent number: 11205974
    Abstract: A piezoelectric driving device includes a first substrate having cleavability, and a piezoelectric element placed above the first substrate, wherein a cleavage direction of the first substrate and a direction in which a shear force is applied do not coincide in a plan view of the first substrate. Further, an angle formed by the cleavage direction of the first substrate and the direction in which the shear force is applied is equal to or larger than 20° in the plan view of the first substrate. Furthermore, the first substrate contains silicon single crystal.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: December 21, 2021
    Inventors: Yutaka Arakawa, Akio Konishi, Tomoaki Takahashi
  • Publication number: 20210331308
    Abstract: The horizontal articulated robot includes a platform, a first arm which is coupled to the platform, which moves along a first linear-motion axis with respect to the platform, and which rotates around a first rotational axis parallel to the first linear-motion axis, a second arm which is coupled to the first arm, which moves along a second linear-motion axis different in direction from the first linear-motion axis with respect to the first arm, and which rotates around a second rotational axis parallel to the first rotational axis, a third arm which is coupled to the second arm, and which rotates around a third rotational axis perpendicular to the first linear-motion axis, and a fourth arm which is coupled to the third arm, and which rotates around a fourth rotational axis perpendicular to the third rotational axis.
    Type: Application
    Filed: April 23, 2021
    Publication date: October 28, 2021
    Inventors: Tomohisa IWAZAKI, Yutaka ARAKAWA
  • Patent number: 11131428
    Abstract: An adjusting mechanism includes a movable plate having a substantially rectangular shape and including a long side and a short side, a position adjusting actuator configured to come into contact with and press the movable plate, a reference plate on which the movable plate is placed, and an elastic member coupling the movable plate and the reference plate, the elastic member being elastically deformable in a direction along an X axis. The position adjusting actuator adjusts a position of the movable plate with respect to the reference plate when the position adjusting actuator presses the movable plate in the direction along the X axis and moves the movable plate in the direction along the X axis and a ?z direction.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: September 28, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akira Nemura, Tomohisa Iwazaki, Yutaka Arakawa
  • Patent number: 11107969
    Abstract: A piezoelectric drive device includes: a vibrating body having a first surface and a second surface provided with a recessed portion; and a piezoelectric element provided on the first surface. The recessed portion and the piezoelectric element have an overlap region when viewed in a normal direction of the second surface.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: August 31, 2021
    Inventors: Tomohisa Iwazaki, Yutaka Arakawa, Akio Konishi, Yuichiro Tsuyuki
  • Publication number: 20210226560
    Abstract: A piezoelectric motor includes a piezoelectric actuator, a holding member that holds the piezoelectric actuator, a housing in which the piezoelectric actuator and the holding member are placed, a first positioning pin that positions the holding member and the housing, and a first fixing part that fixes the first positioning pin. In the piezoelectric motor, the first positioning pin is fixed to one of the holding member and the housing, and a first hole portion in which the first positioning pin is placed is provided in the other of the holding member and the housing. The first fixing part fixes relative positions of the first hole portion and the first positioning pin.
    Type: Application
    Filed: January 20, 2021
    Publication date: July 22, 2021
    Inventors: Yudai OKAMAE, Tomohisa IWAZAKI, Yutaka ARAKAWA
  • Patent number: 11050365
    Abstract: A first member, a second member, a bearing that rotatably supports the second member about a rotation axis relative to the first member, a driven member placed on the first member, and a plurality of piezoelectric actuators that transmit driving forces for rotating the second member about the rotation axis relative to the first member to the driven member are provided, and the piezoelectric actuators are supported by the second member while being pressed against the first member or the member fixed thereto, and, as seen from a direction along the rotation axis, a center of pressing forces from the plurality of piezoelectric actuators to the driven member is located inside of an outer circumferential part of the bearing.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: June 29, 2021
    Inventors: Yutaka Arakawa, Tomohisa Iwazaki
  • Patent number: 11043909
    Abstract: A piezoelectric driving device includes a supporting section, a first moving section movable in a first direction relative to the supporting section, a second moving section movable in a second direction relative to the first moving section, a first driving section configured to drive a first piezoelectric actuator to move the first moving section relative to the supporting section and stop the first piezoelectric actuator to hold the first moving section on the supporting section, and a second driving section configured to drive a second piezoelectric actuator to move the second moving section relative to the first moving section and stop the second piezoelectric actuator to hold the second moving section on the first moving section. A first holding force for holding the first moving section on the supporting section and a second holding force for holding the second moving section on the first moving section are different from each other.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: June 22, 2021
    Inventors: Yutaka Arakawa, Tomohisa Iwazaki
  • Patent number: 11031884
    Abstract: A control device for a vibration actuator includes a detection signal acquisition section adapted to obtain an alternating-current detection signal corresponding to a vibration of the resonator body from the resonator bodies, a phase difference detection section adapted to detect a phase difference between the drive signal and the detection signal with respect to the resonator bodies, a resonator body selection section adapted to select one from the resonator bodies, and a drive signal control section adapted to adjust a frequency of the drive signal so that the phase difference in the resonator body selected comes closer to a target value.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: June 8, 2021
    Inventors: Yutaka Arakawa, Kiichi Kajino
  • Patent number: 11014250
    Abstract: A gripping device includes a rotating member having a pinion and rotating about a center axis of the pinion, a drive piezoelectric unit having a vibrating portion that vibrates with expansion and contraction of a piezoelectric material, and a convex portion provided in the vibrating portion, being in contact with the rotating member, and transmitting vibration of the vibrating portion to the rotating member, a rack meshing with the pinion and moving with rotation of the pinion, and a gripping part coupled to the rack, wherein a contact portion in which the convex portion and the rotating member are in contact is located outside of an outer circumference of the pinion in a plan view from a direction of a rotation axis of the rotating member.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: May 25, 2021
    Inventors: Tomohisa Iwazaki, Yutaka Arakawa