Patents by Inventor Ai KIKUCHI

Ai KIKUCHI 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).

  • Machine tool
    Patent number: 11465230
    Abstract: A machine tool includes a first main shaft, a first drive source for moving the first main shaft, a second main shaft, a second drive source for moving the second main shaft, and a control means for carrying out a control so as to bring the workpiece held by the first main shaft and the workpiece held by the second main shaft into contact with each other while rotating them relative to each other, thereby to carry out the friction-heating, and to stop the relative rotation of the pair of workpieces and move only the second main shaft in the axial direction while holding the first main shaft stationary, thereby to carry out friction-welding of the pair of workpieces. The control means controls the operation of the first drive source upon the friction-welding of the pair of workpieces, so as to maintain the axial position of the first main shaft.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: October 11, 2022
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventors: Takaichi Nakaya, Ai Kikuchi
  • MACHINE TOOL
    Publication number: 20210291294
    Abstract: A machine tool includes a first main shaft, a first drive source for moving the first main shaft, a second main shaft, a second drive source for moving the second main shaft, and a control means for carrying out a control so as to bring the workpiece held by the first main shaft and the workpiece held by the second main shaft into contact with each other while rotating them relative to each other, thereby to carry out the friction-heating, and to stop the relative rotation of the pair of workpieces and move only the second main shaft in the axial direction while holding the first main shaft stationary, thereby to carry out friction-welding of the pair of workpieces. The control means controls the operation of the first drive source upon the friction-welding of the pair of workpieces, so as to maintain the axial position of the first main shaft.
    Type: Application
    Filed: July 16, 2019
    Publication date: September 23, 2021
    Applicants: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventors: Takaichi NAKAYA, Ai KIKUCHI