Patents by Inventor Hirokazu Tsuneda

Hirokazu Tsuneda 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: 11982324
    Abstract: To provide a cam clutch unit that is easy to handle before assembly, with its components prevented from lifting or detachment, and that allows production with fewer machining steps and a lower level of difficulty, while also enabling unit thickness reduction. The cam clutch unit of the present invention includes: a plurality of cams arranged between an inner race and an outer race; a cage ring having a plurality of pocket portions that restrict relative circumferential movements of the cams; and an annular spring that biases the cams. The cams have an engagement step adapted to engage with the spring on one axial end face. The cage ring has a plurality of hook portions that restrict an axial movement of the annular spring. The hook portions have a pressing part that allows the spring to press the cams towards the other axial end.
    Type: Grant
    Filed: July 14, 2023
    Date of Patent: May 14, 2024
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Akira Morita, Hirokazu Tsuneda, Yuji Kurematsu
  • Publication number: 20240102520
    Abstract: To provide a cam clutch unit that is easy to handle before assembly, with its components prevented from lifting or detachment, and that allows production with fewer machining steps and a lower level of difficulty, while also enabling unit thickness reduction. The cam clutch unit of the present invention includes: a plurality of cams arranged between an inner race and an outer race; a cage ring having a plurality of pocket portions that restrict relative circumferential movements of the cams; and an annular spring that biases the cams. The cams have an engagement step adapted to engage with the spring on one axial end face. The cage ring has a plurality of hook portions that restrict an axial movement of the annular spring. The hook portions have a pressing part that allows the spring to press the cams towards the other axial end.
    Type: Application
    Filed: July 14, 2023
    Publication date: March 28, 2024
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Akira Morita, Hirokazu Tsuneda, Yuji Kurematsu
  • Patent number: 11767891
    Abstract: To provide a cam clutch unit that reduces the number of machining steps and level of difficulty of cam clutch production and reduces rotation resistance caused by rollers. The cam clutch unit includes: a plurality of cams and a plurality of rollers circumferentially arranged between an inner race and an outer race that are coaxial and rotatable relative to each other; a cage ring having a plurality of pocket portions that restrict circumferential relative movements of the cams and the rollers; and an annular spring that biases the cams. The cams each have, on one axial end face, an engagement step that can engage with the spring. The cage ring has a plurality of hook portions that restrict axial movements of the annular spring.
    Type: Grant
    Filed: January 6, 2023
    Date of Patent: September 26, 2023
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Akihiro Fukuda, Hirokazu Tsuneda, Yuji Kurematsu
  • Publication number: 20230228302
    Abstract: To provide a cam clutch unit that reduces the number of machining steps and level of difficulty of cam clutch production and reduces rotation resistance caused by rollers. The cam clutch unit includes: a plurality of cams and a plurality of rollers circumferentially arranged between an inner race and an outer race that are coaxial and rotatable relative to each other; a cage ring having a plurality of pocket portions that restrict circumferential relative movements of the cams and the rollers; and an annular spring that biases the cams. The cams each have, on one axial end face, an engagement step that can engage with the spring. The cage ring has a plurality of hook portions that restrict axial movements of the annular spring.
    Type: Application
    Filed: January 6, 2023
    Publication date: July 20, 2023
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Akihiro Fukuda, Hirokazu Tsuneda, Yuji Kurematsu