Patents by Inventor Tatsuru KIOKA

Tatsuru KIOKA 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).

  • Die-cutting device for die-cutting fiber mat to be used for plastic gear, method for producing gear-shaped cutter to be used for this die-cutting device, method for producing cutting tool, and method for die-cutting fiber mat
    Patent number: 10751960
    Abstract: A cutting tool includes a steel gear-shaped cutter which has cutting edges for die-cutting a fiber mat into a predetermined gear shape. The cutting edges include tooth-top, tooth-bottom and tooth-surface cutting edges, and. The cutter has an inclined cylindrical exterior shape so that its thickness gradually increases from the cutting edges toward the base end. V-shaped grooves are formed on the exterior surface and become shallower from the cutting edge toward the base end. The wedge angle (?1) of the tooth-bottom line from the tooth-bottom cutting edge to the base end is greater than the wedge angle (?2) of the tooth-top cutting edge surface from the tooth-top cutting edges to the base end. The thickness (W1) of the tooth-bottom cutting edge is greater than the thickness (W2) of the tooth-top cutting edge on the base-side end.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: August 25, 2020
    Inventor: Tatsuru Kioka
  • DIE-CUTTING DEVICE FOR DIE-CUTTING FIBER MAT TO BE USED FOR PLASTIC GEAR, METHOD FOR PRODUCING GEAR-SHAPED CUTTER TO BE USED FOR THIS DIE-CUTTING DEVICE, METHOD FOR PRODUCING CUTTING TOOL, AND METHOD FOR DIE-CUTTING FIBER MAT
    Publication number: 20180099464
    Abstract: A cutting tool includes a steel gear-shaped cutter which has cutting edges for die-cutting a fiber mat into a predetermined gear shape. The cutting edges include tooth-top, tooth-bottom and tooth-surface cutting edges, and. The cutter has an inclined cylindrical exterior shape so that its thickness gradually increases from the cutting edges toward the base end. V-shaped grooves are formed on the exterior surface and become shallower from the cutting edge toward the base end. The wedge angle (?1) of the tooth-bottom line from the tooth-bottom cutting edge to the base end is greater than the wedge angle (?2) of the tooth-top cutting edge surface from the tooth-top cutting edges to the base end. The thickness (W1) of the tooth-bottom cutting edge is greater than the thickness (W2) of the tooth-top cutting edge on the base-side end.
    Type: Application
    Filed: October 3, 2017
    Publication date: April 12, 2018
    Inventor: Tatsuru KIOKA