Patents by Inventor Eiji Imoto

Eiji Imoto 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).

  • Progressive metal mold apparatus for production of laminated iron cores
    Patent number: 4615207
    Abstract: In a metallic mold apparatus, a rotational power for a skewing operation and a rotational power for an indexing operation are applied through a differential gear device to a rotatably supported die. More specifically, the skew power from such an electric motor as a servomotor operative in synchronism with a press operation and the indexing power from an index means operatively coupled to a press are applied to the differential gear device.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: October 7, 1986
    Assignee: Mitsui High-Tec, Inc.
    Inventors: Takamitsu Oboshi, Tomoaki Koga, Eiji Imoto
  • Method and apparatus for producing laminated iron cores
    Patent number: 4597168
    Abstract: A method and apparatus for producing laminated iron cores wherein a new skew angle .DELTA..theta. is calculated when the total thickness of core sheets in a laminated iron core currently being produced reaches a predetermined value L.sub.o, or during a time period after the number of such laminated core sheets reaches a predetermined value n.sub.A before the total thickness reaches the predetermined value L.sub.o, so that a skewing operation for laminated iron core to be next made is carried out on the basis of the new skew angle .DELTA..theta..
    Type: Grant
    Filed: October 1, 1984
    Date of Patent: July 1, 1986
    Assignee: Mitsui High-Tec, Inc.
    Inventors: Takamitsu Oboshi, Tomoaki Koga, Eiji Imoto