Patents by Inventor Ryoi Hamaguchi

Ryoi Hamaguchi 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).

  • Method for producing repulsion magnetic circuit and its production system
    Patent number: 6888433
    Abstract: The present invention provides a method of manufacture capable of manufacturing a repulsion magnetic circuit for a speaker with good production efficiency and in a stabilized manner and an apparatus for use in the manufacture. A position of abutment between first magnetic block circuit attached to lower jig (102) and second magnetic circuit block attached to upper jig (105) is detected by detection of a load current of servomotor (103). A pressing time for achieving adhesion is established by the number of pulses from encoder directly coupled with servomotor (103).
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: May 3, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Ryoi Hamaguchi, Hiroshi Wada
  • Method for producing repulsion magnetic circuit and its production system
    Publication number: 20050005430
    Abstract: The present invention provides a method of manufacture capable of manufacturing a repulsion magnetic circuit for a speaker with good production efficiency and in a stabilized manner and an apparatus for use in the manufacture. A position of abutment between first magnetic block circuit attached to lower jig (102) and second magnetic circuit block attached to upper jig (105) is detected by detection of a load current of servomotor (103). A pressing time for achieving adhesion is established by the number of pulses from encoder directly coupled with servomotor (103).
    Type: Application
    Filed: June 5, 2003
    Publication date: January 13, 2005
    Inventors: Ryoi Hamaguchi, Hiroshi Wada