Patents by Inventor Ezio Marcelli

Ezio Marcelli 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).

  • Pulley for a synchronous drive system comprising a polymeric material toothed-belt and related transmission
    Patent number: 4696665
    Abstract: A pulley for a synchronous drive system comprising a toothed-belt of polymeric material, the pulley comprising grooves provided with flanks having a parabolic arc-shaped profile and a bottom whose ends coincide with the vertices of said parabolic arc-shaped profile. The length of the bottom is comparable with that of the parabolic arc-shaped profiles. Preferably, the grooves have a shape determined by a hob whose rolling pitch line is tangent to the outer circumference of the pulley.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: September 29, 1987
    Assignee: Pirelli Transmissioni Industriali S.p.A.
    Inventors: Vincenzo Macchiarulo, Ezio Marcelli