Patents by Inventor Walter C. Timmerman

Walter C. Timmerman 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).

  • Damper assembly
    Patent number: 4164976
    Abstract: A damper assembly adapted to be affixed to an air-handling unit at an installation site including a plurality of adjacent damper assembly units adapted to be mounted with and for regulating air flow from the air-handling unit, the damper assembly unit having an interlocking structure for interlocking adjacent damper assembly units theretogether. Further, the damper assembly has a damper structure for simultaneously and independently controlling the relative mixing proportions of heated air and cooled air with ambient air for use with a multi-zone air-handling unit.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: August 21, 1979
    Assignee: Timmerman Engineers, Inc.
    Inventor: Walter C. Timmerman