Patents by Inventor Rene Ranc

Rene Ranc 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).

  • Patent number: 5458647
    Abstract: A finger joint prosthesis for metacarpalphalangeal and interphalangeal joints is provided including two diaphyseal parts which are implantable in the phalangeal and/or metacarpal bones and are fixed to a pivotable joint. The joint includes a female cap, a male cap, a shaft force fitted into two openings in the female cap and extending through an opening in the male cap, and a collar surrounding the shaft in the male cap. The joint also includes two side flanges which hold disks for holding the collar in place. The female and male caps and the side flanges are made of titanium alloy while the collar, the shaft, and the disks are made of pyrocarbon so that friction during rotation of the joint occurs only between components that are made of pyrocarbon.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: October 17, 1995
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Michel Brochier, Jacques Gaidry, Claude Moreau, Franccois Moutet, Rene Ranc
  • 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