Patents by Inventor Gilbert Hofsdal

Gilbert Hofsdal 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).

  • Automatic fresh air exchange system
    Publication number: 20050235658
    Abstract: A system and method for automatically providing a fresh air exchange to a cargo unit is disclosed. The system includes a single gas sensor, preferably a carbon dioxide sensor, for providing an input to a controller which derives the carbon dioxide and oxygen levels in the unit. The controller then compares such derived values to preselected levels and selectively opens or closes air flow into the cargo unit in order to bring and maintain the desired oxygen and carbon dioxide levels within the unit.
    Type: Application
    Filed: April 23, 2004
    Publication date: October 27, 2005
    Applicant: Carrier Corporation
    Inventors: Malcolm Fleming, Gilbert Hofsdal