Patents by Inventor Rene, deceased Stefani

Rene, deceased Stefani 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).

  • Cardiac valve with flaps pivoting on balls
    Patent number: 5171263
    Abstract: A cardiac valve comprises a ring, one or more flaps, the pivoting axis of the latter including two balls partly extending into a ring cavity and a conical flap cavity. This arrangement improves the life of the valve by reducing wear, stresses, friction and facilitates the assembly thereof if the ring is constituted by two concentric members and if the ring cavity extends on either side of the inner member. The invention more particularly applies to artificial valves installed in the heart in place of defective natural valves.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: December 15, 1992
    Assignees: Commissariat A l'Energie Atomique, Cogema -Compagnie Generale Des Matieres Nucleaires
    Inventors: Robert Boyer, Rene Ranc, Rene, deceased Stefani