Patents by Inventor Francis A. Dallet

Francis A. Dallet 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).

  • Spirally wound pyrotechnic charge useful for the propulsion of an engine and the like
    Patent number: 4275657
    Abstract: A pyrotechnic charge for generating gases, for example for the propulsion of an engine, comprising elongate strands of propellant fixed, such as by adhesive or mechanical fastening devices, to at least one band of flexible material which is wound into a spiral having several turns so that each strand of propellant is positioned radially between adjacent turns of the band and lies in an axial plane. The flexible band has an inhibiting effect on the combustion characteristics of the strands of propellant.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: June 30, 1981
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventor: Francis A. Dallet