Patents by Inventor Takehiko Funakoshi

Takehiko Funakoshi 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).

  • Apparatus for detecting axial displacements in power windings of electric induction machines
    Patent number: 4023091
    Abstract: In an induction machine having power windings disposed coaxially about the iron core thereof, means for reducing an axial mechanical force produced in any given winding by the interaction of the radial components of leakage flux produced at a time of short-circuiting and an electric current flowing in the given winding at that time. The reducing means includes a plurality of loops mounted respectively at the ends of the given winding and adapted to link the radial components of leakage flux produced at the ends of the given winding at the short-circuiting to generate induced currents in said loops. These currents produce magnetic flux for cancelling the radial components of leakage flux, respectively.
    Type: Grant
    Filed: October 25, 1975
    Date of Patent: May 10, 1977
    Inventors: Toshio Fujita, Katusada Ishida, Takehiko Funakoshi
  • Method of adjusting two concentric windings in electrical induction devices
    Patent number: 4010536
    Abstract: In an induction machine having power windings disposed coaxially about the iron core thereof, means for reducing an axial mechanical force produced in any given winding by the interaction of the radial components of leakage flux produced at a time of short-circuiting and an electric current flowing in the given winding at that time. The reducing means includes a plurality of loops mounted respectively at the ends of the given winding and adapted to link the radial components of leakage flux produced at the ends of the given winding at the short-circuiting to generate induced currents in said loops. These currents produce magnetic flux for cancelling the radial components of leakage flux, respectively.
    Type: Grant
    Filed: October 23, 1975
    Date of Patent: March 8, 1977
    Inventors: Toshio Fujita, Katusada Ishida, Takehiko Funakoshi