Patents by Inventor Yasuo Osada

Yasuo Osada 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).

  • Patent number: 11913784
    Abstract: An absolute encoder preferable in being made compact is provided. The absolute encoder includes a first drive gear, a first permanent magnet, a first angle sensor, and a first driven gear of a central axis that is perpendicular to a central axis of the first drive gear, the first driven gear engaging with the first drive gear. The absolute encoder includes a second drive gear coaxially provided with the first driven gear, the second drive gear being configured to rotate in accordance with rotation of the first driven gear. The absolute encoder includes a second driven gear of which a central axis is perpendicular to the central axis of the first driven gear, the second driven gear engaging with the second drive gear. The absolute encoder includes a second permanent magnet provided on a top end side of the second driven gear.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: February 27, 2024
    Assignee: MINEBEA MITSUMI Inc.
    Inventors: Yasuo Osada, Hiroki Negishi, Katsunori Saito, Norikazu Sato
  • Patent number: 11906300
    Abstract: An absolute encoder suitable for size reduction is provided. An absolute encoder includes: a first driving gear configured to rotate according to rotation of a spindle; a first driven gear having a center axis perpendicular to a center axis of the first driving gear and configured to engage with the first driving gear; and a second driving gear provided coaxially with the first driven gear and configured to rotate according to rotation of the first driven gear. The absolute encoder includes a permanent magnet (8) provided on a layshaft gear (5A) having a center axis perpendicular to the center axis of the first driven gear and where a worm wheel portion (52e) is formed to engage with the second driven gear; and a resin sheet (5A1) provided on the layshaft gear (5A) to prevent the permanent magnet (8) from coming out from the layshaft gear (5A) in the axial direction.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: February 20, 2024
    Assignee: MINEBEA MITSUMI Inc.
    Inventors: Katsunori Saito, Hiroki Negishi, Yasuo Osada, Norikazu Sato
  • Patent number: 11852511
    Abstract: An absolute encoder includes a circuit board disposed away from a rotation shaft of a motor. The circuit board includes first fixing portions and a second fixing portion. At each of the first fixing portions, an adjustment portion is disposed between the circuit board and a top end portion of a given pillar is provided, the adjustment portion being set to adjust a distance between the circuit board and the top end portion of the given pillar, so that a height of the circuit board at each first fixing portion is set to be the same as a height of the circuit board at the second fixing portion. Each adjustment portion is a resist layer formed between a surface of the circuit board and a top end surface of a given first pillar.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: December 26, 2023
    Assignee: MINEBEA MITSUMI Inc.
    Inventors: Yujin Ishi, Yasuo Osada
  • Publication number: 20230024876
    Abstract: To reduce the influence of an unintended magnetic flux of a permanent magnet on detection accuracy. An absolute encoder (2) includes a magnet provided at a tip end side of any one of a first worm gear portion (11) and a second worm gear portion (22), and an angle sensor configured to detect a rotation angle of the magnet in response to a change in magnetic flux generated from the magnet. In the magnet, a first magnetic pole portion of a first polarity and a second magnetic pole portion of a second polarity different from the first polarity are formed adjacent to each other as viewed from an axial end surface of the magnet. The first magnetic pole portion and the second magnetic pole portion are formed adjacent to each other in a radial direction with a radial center of the magnet as a boundary, and the first magnetic pole portion and the second magnetic pole portion are formed adjacent to each other in an axial direction with an axial center as a boundary.
    Type: Application
    Filed: December 25, 2020
    Publication date: January 26, 2023
    Inventors: Kaoru NISHIGUCHI, Yasuo OSADA, Takahiro OHARA
  • Patent number: 11561117
    Abstract: An absolute encoder includes a first drive gear (worm gear 1d) configured to rotate in accordance with rotation of a main spindle, and a first driven gear (worm wheel 2a) that engages with the first drive gear. The absolute encoder includes a second drive gear (worm gear 2b) provided coaxially with the first driven gear and configured to rotate in accordance with rotation of the first driven gear, and a second driven gear provided, in a plan view, on a side opposite the first drive gear with respect to the first driven gear and the second drive gear, the second driven gear engaging with the second drive gear. The absolute encoder includes an angular sensor configured to detect a rotation angle of a rotating body that is rotated in accordance with rotation of the second driven gear.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: January 24, 2023
    Assignee: MINEBEA MITSUMI Inc.
    Inventor: Yasuo Osada
  • Publication number: 20230020212
    Abstract: To reduce the influence of backlash in a reduction mechanism on detection accuracy. An absolute encoder includes a first worm gear portion rotating according to rotation of a main shaft and a first worm wheel portion meshing with the first worm gear portion. The absolute encoder is provided coaxially with the first worm wheel portion and includes a second worm gear portion rotating according to rotation of the first worm wheel portion and a second worm wheel portion meshing with the second worm gear portion. The absolute encoder also includes a biasing mechanism biasing the second worm gear portion in the direction of the second worm wheel portion.
    Type: Application
    Filed: December 7, 2020
    Publication date: January 19, 2023
    Inventor: Yasuo OSADA
  • Patent number: 11404938
    Abstract: Provided is an angle detection apparatus making it possible to reduce the labor of manufacturing while also suppressing bulkiness. The angle detection apparatus includes a first rotating body (120), a second rotating body (122), a first transmission mechanism (111) that causes the second rotating body (122) to rotate by reducing a speed of a rotation of the first rotating body (120), a first angle detector (Ds) that detects a rotational angle of the first rotating body (120), another second angle detector (Dm) that detects a rotational angle of the second rotating body (122), and a processor (40) that specifies a number of revolutions (Rs) of the first rotating body (120).
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: August 2, 2022
    Assignee: MINEBEA MITSUMI Inc.
    Inventors: Yasuo Osada, Hiroyuki Hishiyama
  • Publication number: 20220221310
    Abstract: An absolute encoder includes a circuit board disposed away from a rotation shaft of a motor in a shaft direction of the rotation shaft thereof, the circuit board being fixed to top end surfaces of multiple pillars each extending from a motor side, by respective locking sections. The absolute encoder includes a sensor disposed, on the circuit board, facing a rotating body that rotates in accordance with rotation of the rotation shaft, the sensor being configured to detect a rotation amount of the rotating body. The circuit board includes first fixing portions each fixed to a top end surface of a given pillar, by a corresponding locking section. The circuit board includes a second fixing portion fixed to a top end surface of a given pillar by a corresponding locking section, the second fixing portion being connected to a ground.
    Type: Application
    Filed: March 13, 2020
    Publication date: July 14, 2022
    Inventors: Yujin ISHI, Yasuo OSADA
  • Publication number: 20220196380
    Abstract: An absolute encoder suitable for size reduction is provided. An absolute encoder includes: a first driving gear configured to rotate according to rotation of a spindle; a first driven gear having a center axis perpendicular to a center axis of the first driving gear and configured to engage with the first driving gear; and a second driving gear provided coaxially with the first driven gear and configured to rotate according to rotation of the first driven gear. The absolute encoder includes a permanent magnet (8) provided on a layshaft gear (5A) having a center axis perpendicular to the center axis of the first driven gear and where a worm wheel portion (52e) is formed to engage with the second driven gear; and a resin sheet (5A1) provided on the layshaft gear (5A) to prevent the permanent magnet (8) from coming out from the layshaft gear (5A) in the axial direction.
    Type: Application
    Filed: March 24, 2020
    Publication date: June 23, 2022
    Inventors: Katsunori SAITO, Hiroki NEGISHI, Yasuo OSADA, Norikazu SATO
  • Patent number: 11365984
    Abstract: The present invention provides an absolute encoder suitable for reduction in thickness. An absolute encoder, for determining a rotation amount of a main spindle that rotates a plurality of revolutions, includes a first drive gear configured to rotate in accordance with rotation of the main spindle; a first driven gear that engages with the first drive gear; a second drive gear configured to rotate in accordance with rotation of the first driven gear; a second driven gear that engages with the second drive gear; and an angular sensor configured to detect a rotation angle at which a second rotating body is rotated in accordance with rotation of the second driven gear.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: June 21, 2022
    Assignee: MINEBEA MITSUMI Inc.
    Inventor: Yasuo Osada
  • Publication number: 20220170731
    Abstract: An absolute encoder suitable for size reduction is provided. The absolute encoder includes a spindle gear (1A) fixed to a motor shaft (201), a permanent magnet (9) provided on the spindle gear (1A), and a first driven gear having a center axis perpendicular to a center axis of a worm gear portion (181), and engaging the wo m gear portion (181). The absolute encoder includes a second driving gear provided coaxially with the first driven gear and rotating according to a rotation of the first driven gear, and a second driven gear having a center axis perpendicular to the center axis of the first driven gear, and engaging the second driven gear. The spindle gear (1A) includes a magnet holder (170) which is fit onto a tip end of the motor shaft (201), coaxially with the motor shaft (201), and a resin gear portion (180) provided with the worm gear portion (181) on an outer side in a radial direction.
    Type: Application
    Filed: March 24, 2020
    Publication date: June 2, 2022
    Inventors: Katsunori SAITO, Yasuo OSADA, Hiroki NEGISHI, Norikazu SATO
  • Publication number: 20220163318
    Abstract: An absolute encoder preferable in being made compact is provided. The absolute encoder includes a first drive gear, a first permanent magnet, a first angle sensor, and a first driven gear of a central axis that is perpendicular to a central axis of the first drive gear, the first driven gear engaging with the first drive gear. The absolute encoder includes a second drive gear coaxially provided with the first driven gear, the second drive gear being configured to rotate in accordance with rotation of the first driven gear. The absolute encoder includes a second driven gear of which a central axis is perpendicular to the central axis of the first driven gear, the second driven gear engaging with the second drive gear. The absolute encoder includes a second permanent magnet provided on a top end side of the second driven gear.
    Type: Application
    Filed: March 24, 2020
    Publication date: May 26, 2022
    Inventors: Yasuo OSADA, Hiroki NEGISHI, Katsunori SAITO, Norikazu SATO
  • Publication number: 20220163317
    Abstract: An absolute encoder preferable in being made compact is provided. The absolute encoder includes a worm gear (101c) that rotates in accordance with rotation of a main spindle, and a worm wheel (102a) of which a central axis is perpendicular to a central axis of the worm gear (101c), the worm wheel engaging with the worm gear (101c). The worm gear (101c) is formed using a first material, and the worm wheel (102a) is formed using a second material different from the first material.
    Type: Application
    Filed: March 24, 2020
    Publication date: May 26, 2022
    Inventors: Katsunori SAITO, Yasuo OSADA, Hiroki NEGISHI, Norikazu SATO
  • Publication number: 20220018690
    Abstract: An absolute encoder includes a first drive gear (worm gear 1d) configured to rotate in accordance with rotation of a main spindle, and a first driven gear (worm wheel 2a) that engages with the first drive gear. The absolute encoder includes a second drive gear (worm gear 2b) provided coaxially with the first driven gear and configured to rotate in accordance with rotation of the first driven gear, and a second driven gear provided, in a plan view, on a side opposite the first drive gear with respect to the first driven gear and the second drive gear, the second driven gear engaging with the second drive gear. The absolute encoder includes an angular sensor configured to detect a rotation angle of a rotating body that is rotated in accordance with rotation of the second driven gear.
    Type: Application
    Filed: November 21, 2019
    Publication date: January 20, 2022
    Inventor: Yasuo OSADA
  • Patent number: 11079257
    Abstract: The present disclosure provides an absolute encoder capable of suppressing an increase in size while securing the resolution. An encoder includes a magnet rotating integrally with at least one rotary body and a plurality of rotary sensors detecting magnetic poles of the magnet to output detection signals having sinusoidal waveforms, each sinusoidal waveform having a different phase. The at least one rotary body includes a first rotary body rotating integrally with a main shaft and a third rotary body rotating together with the rotation of the first rotary body. The absolute encoder includes an angular sensor to detect the rotational angle of the first rotary body and the magnet is arranged in the third rotary body.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: August 3, 2021
    Assignee: MINEBEA MITSUMI INC.
    Inventor: Yasuo Osada
  • Publication number: 20200280245
    Abstract: Provided is an angle detection apparatus making it possible to reduce the labor of manufacturing while also suppressing bulkiness. The angle detection apparatus includes a first rotating body (120), a second rotating body (122), a first transmission mechanism (111) that causes the second rotating body (122) to rotate by reducing a speed of a rotation of the first rotating body (120), a first angle detector (Ds) that detects a rotational angle of the first rotating body (120), another second angle detector (Dm) that detects a rotational angle of the second rotating body (122), and a processor (40) that specifies a number of revolutions (Rs) of the first rotating body (120).
    Type: Application
    Filed: September 18, 2018
    Publication date: September 3, 2020
    Inventors: Yasuo OSADA, Hiroyuki HISHIYAMA
  • Publication number: 20200132507
    Abstract: The present invention provides an absolute encoder suitable for reduction in thickness. An absolute encoder, for determining a rotation amount of a main spindle that rotates a plurality of revolutions, includes a first drive gear configured to rotate in accordance with rotation of the main spindle; a first driven gear that engages with the first drive gear; a second drive gear configured to rotate in accordance with rotation of the first driven gear; a second driven gear that engages with the second drive gear; and an angular sensor configured to detect a rotation angle at which a second rotating body is rotated in accordance with rotation of the second driven gear.
    Type: Application
    Filed: June 28, 2018
    Publication date: April 30, 2020
    Inventor: Yasuo OSADA
  • Publication number: 20190277668
    Abstract: The present disclosure provides an absolute encoder capable of suppressing an increase in size while securing the resolution. An encoder includes a magnet rotating integrally with at least one rotary body and a plurality of rotary sensors detecting magnetic poles of the magnet to output detection signals having sinusoidal waveforms, each sinusoidal waveform having a different phase. The at least one rotary body includes a first rotary body rotating integrally with a main shaft and a third rotary body rotating together with the rotation of the first rotary body. The absolute encoder includes an angular sensor to detect the rotational angle of the first rotary body and the magnet is arranged in the third rotary body.
    Type: Application
    Filed: May 24, 2019
    Publication date: September 12, 2019
    Inventor: Yasuo OSADA
  • Publication number: 20170197042
    Abstract: A nebulizer includes: a suction mechanism configured to suck a liquid for humidification from a water bottle containing the liquid and form an aerosol of the sucked liquid by a negative pressure produced by an oxygen gas jetted from a gas jetting part of a nozzle member; a liquid receptor configured to store the liquid residing in the form of droplets into which the aerosol turns; and a receptor-side aerosol forming member configured to suck the liquid from the liquid receptor and form an aerosol of the sucked liquid by the negative pressure. Consequently, germs are prevented from getting into the liquid in a container during use, and the liquid is prevented from dripping when the container is replaced.
    Type: Application
    Filed: May 28, 2015
    Publication date: July 13, 2017
    Inventors: Yasuo OSADA, Kazufuku NITTA, Dan NITTA, Shinichi NAKANE
  • Publication number: 20170189638
    Abstract: A humidifying device (nebulizer) includes a liquid receptor configured to temporarily store a liquid, a liquid transfer mechanism configured to transfer a liquid from a container to the liquid receptor, a receptor-side aerosol forming member configured to suck the liquid of the liquid receptor from a liquid suction port by a negative pressure produced by a gas jetted from a gas jetting part of a nozzle member, and form an aerosol of the liquid with a receptor-side aerosol generation nozzle, and a heating mechanism configured to heat at least part of the liquid of the liquid receptor or the liquid in the receptor-side aerosol forming member. A humidifying device that can perform efficient and hygienic heating by using a heater during humidification can thus be provided.
    Type: Application
    Filed: September 11, 2015
    Publication date: July 6, 2017
    Inventors: Yasuo OSADA, Kazufuku NITTA, Dan NITTA, Satoshi TOMOZAWA