Patents by Inventor Hiroyuki Okayama

Hiroyuki Okayama 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: 11073201
    Abstract: A hydraulically operated transmission includes: a pressure regulator which regulates pressure of a hydraulic oil supplied to a coupling hydraulic chamber of a frictional coupling element for starting a vehicle; and a lubrication control valve provided at a lubricant oil supplying circuit for supplying the lubricant oil to the frictional coupling element. The lubrication control valve operates, in coupling the frictional coupling element at start of the vehicle, such that the lubricant oil is supplied to the frictional coupling element at a greater flow rate when a regulated pressure regulated by the pressure regulator is lower than a second predetermined pressure, than when the regulated pressure is higher than or equal to the second predetermined pressure. The second predetermined pressure is set to be higher than or equal to a first predetermined pressure, at which the frictional coupling element is completely coupled, and to be lower than a high pressure.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: July 27, 2021
    Assignee: Mazda Motor Corporation
    Inventors: Takashi Ishiyama, Fumitoshi Sato, Hiroyuki Okayama, Masuhiro Kawakami, Tomokazu Kinoshita
  • Patent number: 11047468
    Abstract: A hydraulically actuated transmission includes a selecting switching valve configured to selectively switch between a first switching valve and a second switching valve as a valve to be connected with an outlet port of a solenoid valve. The selecting switching valve is configured to operate in response to a hydraulic pressure applied to a specific frictional coupling element (second brake) in accordance with coupling and releasing of the specific frictional coupling element, and is configured to connect the outlet port with the first switching valve while the hydraulically actuated transmission is in high gear which is higher than or equal to a predetermined gear, and connect the outlet port with the second switching valve while the hydraulically actuated transmission is in the low gear which is lower than the predetermined gear.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: June 29, 2021
    Assignee: Mazda Motor Corporation
    Inventors: Takashi Ishiyama, Fumitoshi Sato, Hiroyuki Okayama, Masuhiro Kawakami, Tomokazu Kinoshita
  • Patent number: 10677314
    Abstract: A power transmission apparatus with a centrifugal pendulum damper is realized, which can effectively suppress torque fluctuation and vibration noise of a vehicle while avoiding size increase of a centrifugal pendulum damper and deterioration of reliability of the centrifugal pendulum damper by high-speed rotation. A power transmission apparatus with a centrifugal pendulum damper includes: a centrifugal pendulum damper coupled to an input shaft through a speed-increasing mechanism configured to increase speed of rotation of the input shaft; and an engagement/disengagement mechanism capable of realizing and cutting off power transmission from the input shaft to the centrifugal pendulum damper.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: June 9, 2020
    Assignee: Mazda Motor Corporation
    Inventors: Kyosei Nakashima, Kazuhiro Tanaka, Norio Iwashita, Shinya Kamada, Hiroo Akagi, Tomokazu Kinoshita, Hiroyuki Okayama, Narihito Hongawara, Keiji Bouda
  • Publication number: 20200056695
    Abstract: A hydraulically actuated transmission includes a selecting switching valve configured to selectively switch between a first switching valve and a second switching valve as a valve to be connected with an outlet port of a solenoid valve. The selecting switching valve is configured to operate in response to a hydraulic pressure applied to a specific frictional coupling element (second brake) in accordance with coupling and releasing of the specific frictional coupling element, and is configured to connect the outlet port with the first switching valve while the hydraulically actuated transmission is in high gear which is higher than or equal to a predetermined gear, and connect the outlet port with the second switching valve while the hydraulically actuated transmission is in the low gear which is lower than the predetermined gear.
    Type: Application
    Filed: November 1, 2017
    Publication date: February 20, 2020
    Inventors: Takashi Ishiyama, Fumitoshi Sato, Hiroyuki Okayama, Masuhiro Kawakami, Tomokazu Kinoshita
  • Publication number: 20200056694
    Abstract: A hydraulically actuated transmission includes a reducing valve provided at a lubricant oil supplying circuit and configured to reduce a pressure of a lubricant oil having a predetermined pressure and output the lubricant oil with a reduced pressure; and a switching device (switching valve) configured to selectively switch between a first path and a second path as the path for supplying the lubricant oil from the reducing valve to a to-be-lubricated portion. The reducing valve is configured such that an output pressure of the lubricant oil from the reducing valve is higher when the second path is selected by the switching device, than when the first path is selected by the switching device.
    Type: Application
    Filed: November 1, 2017
    Publication date: February 20, 2020
    Inventors: Takashi Ishiyama, Fumitoshi Sato, Hiroyuki Okayama, Masuhiro Kawakami, Tomokazu Kinoshita
  • Publication number: 20190271388
    Abstract: A hydraulically operated transmission includes: a pressure regulator which regulates pressure of a hydraulic oil supplied to a coupling hydraulic chamber of a frictional coupling element for starting a vehicle; and a lubrication control valve provided at a lubricant oil supplying circuit for supplying the lubricant oil to the frictional coupling element. The lubrication control valve operates, in coupling the frictional coupling element at start of the vehicle, such that the lubricant oil is supplied to the frictional coupling element at a greater flow rate when a regulated pressure regulated by the pressure regulator is lower than a second predetermined pressure, than when the regulated pressure is higher than or equal to the second predetermined pressure. The second predetermined pressure is set to be higher than or equal to a first predetermined pressure, at which the frictional coupling element is completely coupled, and to be lower than a high pressure.
    Type: Application
    Filed: November 1, 2017
    Publication date: September 5, 2019
    Inventors: Takashi Ishiyama, Fumitoshi Sato, Hiroyuki Okayama, Masuhiro Kawakami, Tomokazu Kinoshita
  • Publication number: 20180283492
    Abstract: A power transmission apparatus with a centrifugal pendulum damper is realized, which can effectively suppress torque fluctuation and vibration noise of a vehicle while avoiding size increase of a centrifugal pendulum damper and deterioration of reliability of the centrifugal pendulum damper by high-speed rotation. A power transmission apparatus with a centrifugal pendulum damper includes: a centrifugal pendulum damper coupled to an input shaft through a speed-increasing mechanism configured to increase speed of rotation of the input shaft; and an engagement/disengagement mechanism capable of realizing and cutting off power transmission from the input shaft to the centrifugal pendulum damper.
    Type: Application
    Filed: September 26, 2016
    Publication date: October 4, 2018
    Inventors: Kyosei Nakashima, Kazuhiro Tanaka, Norio Iwashita, Shinya Kamada, Hiroo Akagi, Tomokazu Kinoshita, Hiroyuki Okayama, Narihito Hongawara, Keiji Bouda
  • Patent number: 6137027
    Abstract: Disclosed herein are a solid waste treatment agent comprising phosphorous acid or a derivative thereof and/or hypophosphorous acid or a derivative thereof, or phosphorous acid or a derivative thereof and/or hypophosphorous acid or a derivative thereof, and an aluminum compound and/or a titanium compound, and a method of treating solid waste, which comprises adding the solid waste treatment agent to solid waste containing harmful metals and/or organic chlorinated compounds such as dioxins and PCB to make the solid waste harmless.
    Type: Grant
    Filed: February 10, 1999
    Date of Patent: October 24, 2000
    Assignee: Miyoshi Yushi Kabushiki Kaisha
    Inventors: Masatake Kawashima, Takashi Ogawa, Kazuhiro Terada, Hiroyuki Okayama, Katsushi Sugiyama, Kazuo Hosoda, Masafumi Moriya