Patents by Inventor Norikazu Sato

Norikazu 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).

  • Publication number: 20240230309
    Abstract: An influence of use orientation on detection accuracy is reduced. A magnetism detection device includes a magnet (Mr) magnetized, an angle sensor (Sr) as a magnetic sensor configured to detect a magnetic flux from the magnet (Mr), a magnet holder holding the magnet (Mr), and a second layshaft gear shaft. The magnet holder is rotatably supported on the second layshaft gear shaft. The second layshaft gear shaft is made of a magnetic material. An attractive force due to a magnetic force is generated between the magnet (Mr) and the second layshaft gear shaft in a direction of a rotation axis of the magnet holder.
    Type: Application
    Filed: February 24, 2022
    Publication date: July 11, 2024
    Inventors: Yasuo OSADA, Katsunori SAITO, Takeshi SAKIEDA, Norikazu SATO
  • Publication number: 20240141940
    Abstract: Provided is a shaft support structure capable of improving mounting accuracy of a shaft to be press-fitted. The shaft support structure includes a main shaft adapter and a main shaft as a supporting member including a press-fitting portion for press-fitting the main shaft adapter from one end portion. The main shaft adapter has a tapered surface portion having a diameter of one end portion smaller than a diameter of a peripheral surface. The tapered surface portion is subjected to curved surface processing at a connecting portion with the peripheral surface.
    Type: Application
    Filed: February 24, 2022
    Publication date: May 2, 2024
    Inventors: Takeshi SAKIEDA, Katsunori SAITO, Norikazu SATO, Yasuo OSADA
  • Patent number: 11970669
    Abstract: [Technical Problem] An object is to provide a lubricant capable of forming a stable adsorption film on a sliding surface and stabilizing the sliding characteristics (for example, ensuring the wear resistance, etc.). [Solution to Problem] The present invention provides a lubricant represented by the following chemical structural formula. (R: a hydrocarbon group whose carbon number is 8 to 24, m and n: integers of 2 to 8) [Selected Figure] FIG.
    Type: Grant
    Filed: January 27, 2023
    Date of Patent: April 30, 2024
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Mamoru Tohyama, Hiroshi Moritani, Shigeru Hotta, Norikazu Sato, Hisato Takeuchi, Yoshihiro Kikuzawa, Tomoyuki Kinjo
  • Publication number: 20240133670
    Abstract: An influence of use orientation on detection accuracy is reduced. A magnetism detection device includes a magnet (Mr) magnetized, an angle sensor (Sr) as a magnetic sensor configured to detect a magnetic flux from the magnet (Mr), a magnet holder holding the magnet (Mr), and a second layshaft gear shaft. The magnet holder is rotatably supported on the second layshaft gear shaft. The second layshaft gear shaft is made of a magnetic material. An attractive force due to a magnetic force is generated between the magnet (Mr) and the second layshaft gear shaft in a direction of a rotation axis of the magnet holder.
    Type: Application
    Filed: February 24, 2022
    Publication date: April 25, 2024
    Inventors: Yasuo OSADA, Katsunori SAITO, Takeshi SAKIEDA, Norikazu SATO
  • 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
  • Publication number: 20230365883
    Abstract: [Technical Problem] An object is to provide a lubricant capable of forming a stable adsorption film on a sliding surface and stabilizing the sliding characteristics (for example, ensuring the wear resistance, etc.). [Solution to Problem] The present invention provides a lubricant represented by the following chemical structural formula. [Chemical Formula 1] (R: a hydrocarbon group whose carbon number is 8 to 24, m and n: integers of 2 to 8) [Selected Figure] FIG.
    Type: Application
    Filed: January 27, 2023
    Publication date: November 16, 2023
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Mamoru TOHYAMA, Hiroshi MORITANI, Shigeru HOTTA, Norikazu SATO, Hisato TAKEUCHI, Yoshihiro KIKUZAWA, Tomoyuki KINJO
  • Patent number: 11585377
    Abstract: A holder has a protrusion which protrudes from a side surface at a side opposite in an axial direction with respect to a rolling element held in a pocket toward the side opposite in the axial direction. An oil supply hole which penetrates through the holder from the side surface to a surface at a side of the rolling element in the axial direction is formed in the holder. When the holder rotates, the protrusion guides oil into the oil supply hole, and the oil is introduced from the side surface of the holder to the surface on the side of the rolling element.
    Type: Grant
    Filed: March 1, 2022
    Date of Patent: February 21, 2023
    Assignees: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, JTEKT CORPORATION
    Inventors: Mamoru Tohyama, Yasuhiro Ohmiya, Norikazu Sato, Michiru Hirose, Takaaki Onizuka, Yoshio Tateishi, Kenichi Hasegawa, Takuya Toda, Komatsugu Nishimura, Yuya Yamamoto
  • Publication number: 20220333645
    Abstract: A holder has a protrusion which protrudes from a side surface at a side opposite in an axial direction with respect to a rolling element held in a pocket toward the side opposite in the axial direction. An oil supply hole which penetrates through the holder from the side surface to a surface at a side of the rolling element in the axial direction is formed in the holder. When the holder rotates, the protrusion guides oil into the oil supply hole, and the oil is introduced from the side surface of the holder to the surface on the side of the rolling element.
    Type: Application
    Filed: March 1, 2022
    Publication date: October 20, 2022
    Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, JTEKT CORPORATION
    Inventors: Mamoru Tohyama, Yasuhiro Ohmiya, Norikazu Sato, Michiru Hirose, Takaaki Onizuka, Yoshio Tateishi, Kenichi Hasegawa, Takuya Toda, Komatsugu Nishimura, Yuya Yamamoto
  • 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
  • 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: 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: 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: 20220155051
    Abstract: An absolute encoder preferable in being made compact is provided. The absolute encoder includes a worm gear, a permanent magnet (19) provided on a top end side of the worm gear, and magnetic sensors. In the permanent magnet (19), a given first polar portion (N) among first polar portions each having a first polarity and a given second polar portion (S) among second polar portions each having a second polarity different from the first polarity are formed adjacent to each other, when viewed from an end surface of the permanent magnet (19) in an axial direction thereof. A given first polar portion (N) and a given second polar portion (S) are formed to be adjacent in a radial direction, with a radial middle portion of the permanent magnet (19) that is a boundary. A given first polar portion (N) and a given second polar portion (S) are formed to be adjacent in an axial direction, with an axial middle portion of the permanent magnet (19) that is a boundary.
    Type: Application
    Filed: March 24, 2020
    Publication date: May 19, 2022
    Inventors: Norikazu SATO, Kaoru NISHIGUCHI, Hiroyuki HISHIYAMA, Yujin ISHI
  • Patent number: 10711854
    Abstract: A clutch device includes an input disc, an output disc, and a biasing member configured to press the input disc against the output disc. A rotation load applied to an output shaft separates the input disc from the output disc against biasing force of the biasing member. The input disc and the output disc include opposing surfaces, each of which includes axially disengageable overlapping tooth portions. Recessed and raised portions of each tooth portion are formed continuously in a radial direction and are alternately arranged in a circumferential direction. Each of the curved shapes of the recessed and raised portions is maintained at a respective identical height while a circumferential width thereof continuously expands in a radially outward direction. Also disclosed is a motor unit including the clutch device. The disclosed clutch device reduces, e.g., deformation or damage of a disengageable portion, and therefore, can improve durability.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: July 14, 2020
    Assignee: Adamant Namiki Precision Jewel Co., Ltd.
    Inventors: Norikazu Sato, Yasuyuki Kobayashi, Kinya Odagiri
  • Publication number: 20180119755
    Abstract: A clutch device includes an input disc, an output disc, and a biasing member configured to press the input disc against the output disc. A rotation load applied to an output shaft separates the input disc from the output disc against biasing force of the biasing member. The input disc and the output disc include opposing surfaces, each of which includes axially disengageable overlapping tooth portions. Recessed and raised portions of each tooth portion are formed continuously in a radial direction and are alternately arranged in a circumferential direction. Each of the curved shapes of the recessed and raised portions is maintained at a respective identical height while a circumferential width thereof continuously expands in a radially outward direction. Also disclosed is a motor unit including the clutch device. The disclosed clutch device reduces, e.g., deformation or damage of a disengageable portion, and therefore, can improve durability.
    Type: Application
    Filed: December 29, 2017
    Publication date: May 3, 2018
    Applicant: NAMIKI SEIMITSU HOUSEKI KABUSHIKI KAISHA
    Inventors: Norikazu SATO, Yasuyuki KOBAYASHI, Kinya ODAGIRI
  • Patent number: 9869821
    Abstract: A 3D-scanning optical imaging probe which inhibits rotation unevenness of rotational sections, shaft run-out, friction, and rotation transmission delay by reducing the occurrence of torque loss and rotation transmission delay, and which is capable of obtaining 3D scans and observation images within a fixed frontal range. A substantially tubular catheter has, provided along substantially the same line therein: a fixed-side optical fiber; a first optical path conversion means which is rotationally driven by a first motor, and which rotates and emits a beam of light forwards and tilted at an angle with respect to a rotational axis; and a second optical path conversion means which, at a tip side of a rotation-side optical fiber rotationally driven by a second motor, tilts an optical path by a micro-angle with respect to the rotational axis, and rotates and emits the beam of light to irradiate the first optical path conversion means therewith.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: January 16, 2018
    Assignee: Namiki Seimitsu Houseki Kabushiki Kaisha
    Inventors: Hiroshi Yamazaki, Eri Fukushima, Tomoyuki Kugo, Norikazu Sato, Takayuki Koshikawa, Chihiro Okamoto, Takafumi Asada
  • Patent number: 9574870
    Abstract: A probe for a three-dimensional (3D) scanning optical imaging which prevents rotational irregularity, axial runout, friction, rotation transmission delays of a rotational part by reducing occurrences of rotation transmission delays, torque loss, and the like, and can perform scanning of a certain length in an axial direction and obtain a three-dimensional observation image, in a probe for OCT image diagnosis. A fixed side optical fiber that transmits light between a tip side and a rear side of a probe and is non-rotatably disposed, a first optical path conversion means that rotates to emit a light ray in a substantially radial direction, a rotation side optical fiber which is rotated by a motor, and a second optical path conversion means that rotates and emits light toward the first optical path conversion means are collinearly disposed. In this way, it is possible to obtain a high quality 3D observation image.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: February 21, 2017
    Assignee: Namiki Seimitsu Houseki Kabushiki Kaisha
    Inventors: Hiroshi Yamazaki, Eri Fukushima, Norikazu Sato, Tomoyuki Kugou, Takafumi Asada
  • Publication number: 20160380178
    Abstract: To provide a vibration actuator capable of both rotation and linear drive and providing a stable driving force. A vibration actuator whose output shaft is moved by vibration includes an oscillatable element with an approximately polygonal shape, the oscillatable element including a hole through which the output shaft is inserted and a slit portion expanding radially from this hole. This slit portion generates the spring force between the output shaft and the oscillatable element to energize the output shaft and holds the output shaft. At least one surface of outer peripheral surfaces of the oscillatable element and its opposite surface are provided with vibrators with the patterned electrodes. A progressive wave is generated in the oscillatable element by applying sequentially voltage to an electrode pattern of the patterned electrodes, thereby rotating the output shaft and displacing the output shaft axially due to the vibration.
    Type: Application
    Filed: February 20, 2014
    Publication date: December 29, 2016
    Applicant: NAMIKI SEIMITSU HOUSEKI KABUSHIKI KAISHA
    Inventors: Norikazu SATO, Tomoyuki KUGOU, Takayuki KOSHIKAWA, Chihiro OKAMOTO, Hiroshi YAMAZAKI, Eri FUKUSHIMA, Takafumi ASADA
  • Publication number: 20160223754
    Abstract: A 3D-scanning optical imaging probe which inhibits rotation unevenness of rotational sections, shaft run-out, friction, and rotation transmission delay by reducing the occurrence of torque loss and rotation transmission delay, and which is capable of obtaining 3D scans and observation images within a fixed frontal range. A substantially tubular catheter has, provided along substantially the same line therein: a fixed-side optical fiber; a first optical path conversion means which is rotationally driven by a first motor, and which rotates and emits a beam of light forwards and tilted at an angle with respect to a rotational axis; and a second optical path conversion means which, at a tip side of a rotation-side optical fiber rotationally driven by a second motor, tilts an optical path by a micro-angle with respect to the rotational axis, and rotates and emits the beam of light to irradiate the first optical path conversion means therewith.
    Type: Application
    Filed: April 7, 2016
    Publication date: August 4, 2016
    Applicant: NAMIKI SEIMITSU HOUSEKI KABUSHIKI KAISHA
    Inventors: Hiroshi YAMAZAKI, Eri FUKUSHIMA, Tomoyuki KUGO, Norikazu SATO, Takayuki KOSHIKAWA, Chihiro OKAMOTO, Takafumi ASADA