Patents Assigned to Cavaz, Hanlon & Silva
  • Plate-lifting device
    Patent number: 4304432
    Abstract: A device for lifting a cover plate, the cover plate having a hole therein with opposed beveled surfaces, preferably at the center of gravity of the plate, which device includes a lifting element having an eye extended above laterally expanded, beveled portions, the beveled portions being slightly shallower than the thickness of the plate and of dimensions adapted to correspond in size and angle with the beveled surfaces of the plate.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: December 8, 1981
    Assignee: Cavaz, Hanlon & Silva
    Inventor: Fred D. Silva