Patents Assigned to I.T.V.I. International Techno Venture Invest Aktiengesellschaft
  • Sensor assembly for controlling the ventilation of indoor spaces
    Patent number: 6004201
    Abstract: A pair of pollution sensors which react oppositely to exposure to respective different pollutants are connected together in one or more voltage-divider circuits so that a combined output voltage always becomes either more negative or more positive regardless of which sensor is responding to the presence of the respective pollutant. For example, a tin-dioxide sensor for gasoline exhaust and a tungsten-trioxide sensor for diesel exhaust can be connected in series as a voltage divider with a center tap connected to an evaluating circuit.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: December 21, 1999
    Assignee: I.T.V.I. International Techno Venture Invest Aktiengesellschaft
    Inventor: Hanns Rump
  • Method of operating a ventilation system especially of a motor vehicle
    Patent number: 5793645
    Abstract: The previously presented teaching of the invention describes a method for the evaluation of sensor signals with the purpose of producing plausible and physiologically satisfying switching impulses for interrupting or for opening the air supply in ventilation systems, particularly for the ventilation of passenger cabins in motor vehicles, depending on the pollutant content of the ambient air established by one or more sensors.
    Type: Grant
    Filed: February 13, 1996
    Date of Patent: August 11, 1998
    Assignee: I.T.V.I. International Techno Venture Invest Aktiengesellschaft
    Inventors: Hanns Rump, Jorg Hiller, Norbert Pieper