Patents by Inventor Fred I. Frankenfield

Fred I. Frankenfield 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).

  • Flow director
    Patent number: 4228786
    Abstract: A flow director including a diverting box defining four openings and having four baffles mounted therein. A damper is rotatable within the diverting box to provide for flow in one position between the first and fourth openings and between the second and third openings. In a second position of the damper flow is permitted only between the second and third openings. The combination of the flow director and an air treating means provides for desired flow paths of the air for heating and/or cooling purposes.
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: October 21, 1980
    Assignee: Hedback Corp.
    Inventor: Fred I. Frankenfield