Patents by Inventor Ryo UEYAMA

Ryo UEYAMA 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: 12152656
    Abstract: An electric actuator includes an electric motor, a nut, and a screw shaft threadedly inserted through the nut so as to be able to advance and retreat. The threads of the screw shaft include two flanks and a crest portion connecting the two flanks to each other. Grease is used as a lubricant. A groove portion, which is cut out from the crest portion toward a root portion side of the threads and holds grease, is formed on the threads of the screw shaft. Further, a tapered surface is formed at a groove portion side end of at least one of the two flanks, and the tapered surface inclines in a direction away from the groove portion and drags the grease held in the groove portion onto a threadedly engaged portion with the aid of the wedge effect. As a result, the electric actuator can promote lubrication.
    Type: Grant
    Filed: November 12, 2021
    Date of Patent: November 26, 2024
    Assignee: HITACHI ASTEMO, LTD.
    Inventors: Koji Usui, Ryo Ueyama, Takenori Iso, Hiromu Narukawa
  • Publication number: 20240003410
    Abstract: An electric actuator includes an electric motor, a nut (a first screw member), and a screw shaft (a second screw member) threadedly inserted through the nut to be able to advance and retreat. Each of threads of the screw shaft includes two flanks and a crest portion connecting the flanks to each other. Grease is used as a lubricant. A groove portion, which is cut out from the crest portion toward a root portion side, is formed on each of the threads of the screw shaft. Further, a taper surface, which flares becoming circumferentially farther away from the groove portion, is formed on at least a part of each of peripheral edges of each groove portion on flank sides. The electric actuator can promote lubrication of a threadedly engaged portion between the first and second screw members, thereby improving motion conversion efficiency and reducing wear on the threadedly engaged portion.
    Type: Application
    Filed: November 12, 2021
    Publication date: January 4, 2024
    Inventors: Koji USUI, Ryo UEYAMA, Takenori ISO, Hiromu NARUKAWA
  • Patent number: 10569847
    Abstract: The present invention contributes to vessel navigation safety, by applying conventional navigation technology and using smartphones or other wireless communication terminals to provide a chart according to vessel type. Provided is a server system (3), which: receives, from wireless communication terminals (2) which are carried by users aboard vessels (4), position information of the wireless communication terminals (2) and information of the sizes of the vessels (4); creates, in response to the sizes of the vessels, navigation trajectory information formed from time series position information of the vessels (4); and, with the navigation trajectory information as an input, updates navigable course information for each size of the vessels (4).
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: February 25, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Go Nakamoto, Kanako Ikeda, Ryo Ueyama
  • Publication number: 20180043976
    Abstract: The present invention contributes to vessel navigation safety, by applying conventional navigation technology and using smartphones or other wireless communication terminals to provide a chart according to vessel type. Provided is a server system 3, which: receives, from wireless communication terminals 2 which are carried by users aboard vessels 4, position information of the wireless communication terminals 2 and information of the sizes of the vessels 4; creates, in response to the sizes of the vessels 4, navigation trajectory information formed from time series position information of the vessels 4; and, with the navigation trajectory information as an input, updates navigable course information for each size of the vessels 4.
    Type: Application
    Filed: October 21, 2015
    Publication date: February 15, 2018
    Inventors: Go NAKAMOTO, Kanako IKEDA, Ryo UEYAMA