Patents by Inventor Tomoki SHIRASAWA

Tomoki SHIRASAWA 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).

  • Strain wave gear device
    Patent number: 11959539
    Abstract: It is included an internal gear (2), an external gear (3) having flexibility, and a wave generator (4) that forms a meshing part (P) with the internal gear (2) in the external gear (3) and moves the meshing part (P) in a circumferential direction of the internal gear (2). The wave generator (4) is configured such that the meshing part (P) is formed at three or more positions in a circumferential direction of the external gear (3). A value (DpF/ZF) obtained by dividing a working pitch diameter DpF of the external gear (3) by the number of teeth ZF is greater than a value (DpR/ZR) obtained by dividing a working pitch diameter DpR of the internal gear (2) by the number of teeth ZR.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: April 16, 2024
    Assignee: KABUSHIKI KAISHA RIKEN
    Inventors: Satoru Fujita, Kazuo Ishizuka, Tomoki Shirasawa, Ryo Kamiyama
  • STRAIN WAVE GEAR DEVICE
    Publication number: 20240084884
    Abstract: It is included an internal gear (2), an external gear (3) having flexibility, and a wave generator (4) that forms a meshing part (P) with the internal gear (2) in the external gear (3) and moves the meshing part (P) in a circumferential direction of the internal gear (2). The wave generator (4) is configured such that the meshing part (P) is formed at three or more positions in a circumferential direction of the external gear (3). A value (DpF/ZF) obtained by dividing a working pitch diameter DpF of the external gear (3) by the number of teeth ZF is greater than a value (DpR/ZR) obtained by dividing a working pitch diameter DpR of the internal gear (2) by the number of teeth ZR.
    Type: Application
    Filed: November 18, 2021
    Publication date: March 14, 2024
    Applicant: KABUSHIKI KAISHA RIKEN
    Inventors: Satoru FUJITA, Kazuo ISHIZUKA, Tomoki SHIRASAWA, Ryo KAMIYAMA