Patents by Inventor Nobutaka MURAI

Nobutaka MURAI 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).

  • Step-bending die device
    Patent number: 10421109
    Abstract: In a step-bending die device, the die has a horizontal surface and an inclined surface, forming a semicircular groove with a semicircular cross section along a longitudinal direction on the horizontal surface and installing a semicircular rotary blade rotatably in the semicircular groove. The punch has a horizontal surface and an inclined surface, forming a semicircular groove with a semicircular cross section in a longitudinal direction on the horizontal surface and installing a semicircular rotary blade rotatably in the semicircular groove. Vertical notches at positions changing from the horizontal surfaces to the inclined surfaces are formed in longitudinal directions in the die and the punch so that top portions of the die and the punch are formed. The punch is assembled so that the horizontal surface of the punch faces the inclined surface of the die, and the inclined surface of the punch faces the horizontal surface of the die.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: September 24, 2019
    Assignee: FLIGHT CORPORATION
    Inventors: Nobutaka Murai, Shoichi Murai
  • STEP-BENDING DIE DEVICE
    Publication number: 20180264532
    Abstract: In a step-bending die device, the die has a horizontal surface and an inclined surface, forming a semicircular groove with a semicircular cross section along a longitudinal direction on the horizontal surface and installing a semicircular rotary blade rotatably in the semicircular groove. The punch has a horizontal surface and an inclined surface, forming a semicircular groove with a semicircular cross section in a longitudinal direction on the horizontal surface and installing a semicircular rotary blade rotatably in the semicircular groove. Vertical notches at positions changing from the horizontal surfaces to the inclined surfaces are formed in longitudinal directions in the die and the punch so that top portions of the die and the punch are formed. The punch is assembled so that the horizontal surface of the punch faces the inclined surface of the die, and the inclined surface of the punch faces the horizontal surface of the die.
    Type: Application
    Filed: November 2, 2016
    Publication date: September 20, 2018
    Inventors: Nobutaka MURAI, Shoichi MURAI