Patents by Inventor Piero Bertoldo

Piero Bertoldo 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).

  • Seal for a coupling for protective tubing for electrical cables and a coupling including such a seal
    Patent number: 5288087
    Abstract: The seal (4) has an annular body (10) with a generating section which is substantially rectangular and with an inner cylindrical surface (18) having a diameter (d1) substantially equal to the nominal diameter of the tubing (2) to be connected to the coupling (1). The seal (4) has a rib (20) projecting radially inwardly and having an inner diameter (d2) less than the outer diameter (d1) of the tubing. The seal also has an annular lip (24) which projects axially and has an inner surface with a diameter (d3) intermediate the internal diameter (d2) of the radial rib (20) and the diameter (d1) of the inner surface (18) of the seal (4).
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: February 22, 1994
    Assignee: Bertoldo & C. S. r. l.
    Inventor: Piero Bertoldo