Patents by Inventor Naotake Mohri

Naotake Mohri 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).

  • Patent number: 4952768
    Abstract: An electrode for precision electric discharge machining having an improved machining rate and surface smoothness with respect to conventional graphite and copper electrodes. The electrode is formed by silicon or other materials which has the same characteristics as silicon, a base of a low melting point metal or an alloy of such a low melting point metal is covered with a layer composed of a mixture of the metal and a high resistivity inorganic compound. The outer layer may be formed by adhesion or by thermal spraying or by a powder metal sintering technique.
    Type: Grant
    Filed: March 17, 1988
    Date of Patent: August 28, 1990
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Naotake Mohri
    Inventors: Naotake Mohri, Nagao Saito
  • Patent number: 4948625
    Abstract: A method for forming a surface layer on a base material to be processed by electric discharge process, said method being characterized in that the electric discharge process is conducted in liquid or liquefied gas by use of a metalloid or a metal as an electrode for electric discharge process to thereby form on the surface of said base material a layer having an amorphous alloy structure or a very fine crystal structure.
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: August 14, 1990
    Assignees: Masahiko Suzuki, Mitsubishi Denki Kabushiki Kaisha, Naotake Mohri
    Inventors: Masahiko Suzuki, Nagao Saito, Naotake Mohri, Hideaki Takahashi, Tetsuo Shoji
  • Patent number: 4760314
    Abstract: A rotation control apparatus for a differential actuator includes two induction motors and a differential mechanism for producing a constant torque on its output shaft based on the differential speed of the induction motors. The appartus includes two inverters each located between one of the induction motors and a common power source for the induction motors and having individual voltage/frequency output characteristics. The inverters set separately the voltage/frequency output characteristics of power supplied to the induction motors so as to control the speed of the induction motors separately, thereby controlling the output torque on the output shaft of the differential actuator. And the output shaft of the differential actuator is controlled to constant speeds regardless of the load torque on the shaft based on the difference of setting frequencies on both inverters.
    Type: Grant
    Filed: September 11, 1986
    Date of Patent: July 26, 1988
    Assignees: Naotake Mohri, Mitsubishi Denki Kabushiki Kaisha
    Inventors: Naotake Mohri, Nagao Saito, Yoshihiko Yanai, Kuniharu Miura
  • Patent number: 4740395
    Abstract: A method of manufacturing a composite material by melt-spraying, comprising the steps of melt-spraying a metal as the main constituent of the composite material onto a base plate and injecting a reinforcing substance comprising discontinuous fibers into the metal melt spray stream upstream of the base plate to effect mixing of the reinforcing substance in the melt-sprayed stream of metal within a temperature range without producing a resultant reaction layer between said metal and said reinforcing substance.
    Type: Grant
    Filed: February 13, 1987
    Date of Patent: April 26, 1988
    Assignees: Yoshiki Tsunekawa, Masahiro Okumiya, Naotake Mohri, Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshiki Tsunekawa, Masahiro Okumiya, Naotake Mohri
  • Patent number: 4729258
    Abstract: A differential actuator including a pair of unit actuators enclosed in a housing is provided. Rotational shafts of the unit actuators support bevel gears in opposed relation to each other. These bevel gears constitute a differential mechanism conjointly with two differential gears which are interconnected rotatably. Rotation of the differential gears around the axis of the bevel gears is taken out to the exterior as an output of the actuator.
    Type: Grant
    Filed: August 6, 1987
    Date of Patent: March 8, 1988
    Assignees: Naotake Mohri, Mitsubishi Denki Kabushiki Kaisha
    Inventors: Naotake Mohri, Nagao Saito, Kuniharu Miura, Yoshihiko Yanai