Patents by Inventor Hiroshi Nishii

Hiroshi Nishii 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).

  • Straight air brake control system
    Patent number: 4865394
    Abstract: An electromagnetic straight air brake equipment, especially to an air brake command system for railway vehicles for controlling the brake pipe pressure by employing an electric brake command type brake controller and electropneumatic convertor valve arrangement. This invention makes it possible to assemble the brake controller and the master controller into one handle, and requires no pneumatic piping leading to the operator's cab since the pneumatic apparatus is all located beneath the floor of the railway vehicle.
    Type: Grant
    Filed: August 11, 1988
    Date of Patent: September 12, 1989
    Assignee: Nippon Air Brake Co., Ltd.
    Inventor: Hiroshi Nishii
  • Electropneumatic master controller for an air brake system
    Patent number: 4799740
    Abstract: An electropneumatic master controller for an electromagnetic straight air brake system for railway vehicles has a brake valve, brake solenoid valve, a release solenoid valve, and an electrical interface circuit. The electrical interface circuit includes a first and a second sensor and a first and a second comparator which are responsive to the pressure of the control line and straight air line to open and close the brake and release solenoid valves for applying and releasing the brake cylinder.
    Type: Grant
    Filed: December 15, 1987
    Date of Patent: January 24, 1989
    Assignee: Nippon Air Brake Co., Ltd.
    Inventors: Akihiro Iwaizako, Hiroshi Nishii, Seiki Maruta