Patents by Inventor Marie L. Riffault

Marie L. Riffault 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).

  • Hot-wire ignition initiator for propellant charges
    Patent number: 4354432
    Abstract: The invention relates to a hot-wire ignition initiator for propellant charges for artillery and rockets.This initiator comprises a housing 1 provided with an open cavity 2 within which there is arranged a filament 3 and a pyrotechnic cell composed: (a) of an initiator pyrotechnic composition 5 formed of an oxidant and a reducer, which composition is arranged in intimate contact with the filament, the coefficient of sensitivity to impact of which is at least equal to 100 joules, the coefficient of sensitivity to friction of which is at least 100 N, the coefficient of sensitivity to static electricity of which is about 16 millijoules and the ignition temperature of which is between 250.degree. and 350.degree. C.
    Type: Grant
    Filed: October 15, 1979
    Date of Patent: October 19, 1982
    Assignee: Etat Francais represente par le Delegue General pour l'Armement
    Inventors: Christian G. Cannavo', Andre' Espagnacq, Marie L. Riffault