Patents by Inventor Stefano Cantu

Stefano Cantu 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).

  • Hydraulic elevator having a counterweight
    Patent number: 5901814
    Abstract: A hydraulic elevator includes a hydraulic ram and a counterweight that are directly roped. The hydraulic ram includes a single-acting cylinder, piston and yoke that are placed within the hoistway adjacent to the path of motion of an elevator car. The counterweight is positioned adjacent to the hydraulic ram and on the same side of the car as the hydraulic ram. The combination of the directly counterweighted hydraulic ram and the arrangement of the hydraulic ram, counterweight and car results in minimal power and space requirements.
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: May 11, 1999
    Assignee: Otis Elevator Company
    Inventors: Leandre Adifon, Erminio Guaita, Elio Taverna, Stefano Cantu