Patents by Inventor David A. Tulowiecki

David A. Tulowiecki 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).

  • Duct pressure powered air volume controller
    Patent number: 4756474
    Abstract: A duct pressure powered air volume controller controls the flow through a terminal responsive to the differential pressure across a nozzle plate, the selected ventilation requirements, and the temperature of the supplied air, the zone and the setpoint.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: July 12, 1988
    Assignee: Carrier Corporation
    Inventors: David A. Tulowiecki, Richard C. Dreibelbis
  • Minimum airflow control
    Patent number: 4324358
    Abstract: In a central air conditioning system where airflow is regulated by bellows inflation which is controlled by a bleed-type thermostat, a second bleed which is controlled by a regulator is provided to insure a minimum flow for ventilation independent of cooling demand.
    Type: Grant
    Filed: July 2, 1980
    Date of Patent: April 13, 1982
    Assignee: Carrier Corporation
    Inventors: David Tulowiecki, Richard R. Lavassaur
  • Positive shutoff
    Patent number: 4312474
    Abstract: In a central air conditioning system wherein air flow is regulated by bellows inflation which is controlled by a bleed-type thermostat, simultaneous heating and cooling in a zone is prevented by disabling the bleed-type thermostat when the heating system is activated.
    Type: Grant
    Filed: July 2, 1980
    Date of Patent: January 26, 1982
    Assignee: Carrier Corporation
    Inventor: David Tulowiecki