Patents by Inventor David H. Van Tuyl

David H. Van Tuyl 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).

  • Back-up alarm with improved keeper
    Patent number: 3960104
    Abstract: A wheel hub mountable back up alarm is disclosed having a plurality of ringing units mounted interiorly of a bell. Each ringing unit has an improved clapper and an improved interacting keeper to prevent forward wheel motion ringing, to retard alarm freezing and sticking, and to provide minimum wear on non-ringing rotation.
    Type: Grant
    Filed: May 9, 1975
    Date of Patent: June 1, 1976
    Assignee: E. D. Bullard Company
    Inventor: David H. Van Tuyl