Patents by Inventor Richard E. Niggeman

Richard E. Niggeman 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).

  • Multiple mode environmental control system for pressurized aircraft cabin
    Patent number: 5956960
    Abstract: The need for engine bleed air in a cabin pressurizing/ventilation ECS system for aircraft is avoided in a construction including a pressurizable aircraft cabin (10) having a cabin air inlet (20) and a cabin air outlet (22). The system includes a ram air inlet (34) and an aircraft exhaust air outlet (42) along with a motor operated vapor compression cabin air cooling system (24) having an inlet (28) and an outlet (26). A turbomachine (40) includes a compressor (32) connected between the ram air inlet (34) and the cooling system inlet (28) along with a combustion turbine (38) and a power recovery turbine (41), both mechanically coupled to the compressor and connected between the aircraft exhaust air outlet (42) and the cabin air outlet (22). A motor/generator (36) is coupled to the compressor (32) and the turbines (38, 41) and is operable to drive the compressor (32) when operating as a motor and to be driven by the combustion turbine (38) when operating as a generator.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: September 28, 1999
    Assignee: Sundstrand Corporation
    Inventor: Richard E. Niggeman