Patents by Inventor Joseph Vilaldach

Joseph Vilaldach 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).

  • Lifting device for use in a liquid medium
    Patent number: 4104082
    Abstract: A lifting device for raising a platform out of a liquid medium and lowering it back into the liquid medium comprises a tank supporting the platform and connected to a side wall of the space containing the liquid medium through a linkage pivoted to the side wall and to the tank. To raise the platform air is pumped into the tank and to lower it the air is displaced by the liquid medium.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: August 1, 1978
    Inventors: Claude Boujard, Joseph Vilaldach