Patents by Inventor James F. Vance, Sr.

James F. Vance, Sr. 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: 4590938
    Abstract: An improved medical retriever device sized and adapted for use through the working channel of an endoscope for removing stones and the like from the kidneys, ureter or biliary duct. The device is of the type having an elongated, narrow sheath, a basket of relatively large diameter extendible from the distal end of the sheath and collapsible when withdrawn into the sheath, and remote means to project, retract and rotate the basket relative to the distal end of the sheath. The basket is defined by a multiplicity of spaced apart, outwardly bowed spring strips which extend generally axially of the sheath and are joined at respective distal and proximal ends of the basket. The strips are generally flat, with a ratio of radial to circumferential dimensions of between about 1:2 and 1:4, at least two of the strips at the distal extremity of the basket being disposed face to face and joined together in a manner contributing stiffness to the end of the basket.
    Type: Grant
    Filed: May 4, 1984
    Date of Patent: May 27, 1986
    Inventors: Joseph W. Segura, James F. Vance, Sr.