Patents by Inventor Carl L. Danner

Carl L. Danner 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).

  • Sail control apparatus for vehicles
    Patent number: 3994508
    Abstract: A sail arrangement having a hollow flexible boom with a short stiffener rod disposed therein near the forward end, and a stiffener tube which may be moved along the exterior of the boom. The flexible boom provides both automatic sail positioning and the spilling of excess wind during sudden strong gusts. In a second embodiment, a pivoted rigid boom is controlled by an elastic cord. In a third embodiment, a spring assembly permits the mast to pivot to spill the wind during strong gusts.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: November 30, 1976
    Inventor: Carl L. Danner