Patents by Inventor David M. Dummeyer

David M. Dummeyer 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).

  • Passive cooling device and method for cooling an auxiliary power unit on an airplane
    Patent number: 5655359
    Abstract: A passive cooling system for aircraft auxiliary power units having an intake duct extending between an inlet opening and the compartment in which the auxiliary power unit is positioned. An inlet scoop is positioned in the intake duct for diverting a portion of the airflow in the intake duct through an outlet in a wall of the intake duct. A vacuum duct is positioned near an oil cooler for the auxiliary power unit, and an aspirator is operatively positioned between the vacuum duct and an exhaust passage of the auxiliary power unit. The aspirator creates a low-pressure region in the vacuum duct that draws the diverted air out of the outlet and through the oil cooler.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: August 12, 1997
    Assignee: The Boeing Company
    Inventors: Thomas A. Campbell, David M. Dummeyer, Mohammad Yahyavi