Patents by Inventor Riva Giovanni

Riva Giovanni 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).

  • Locking device to load and to screw a drill stem and casing tubes for drill rigs
    Patent number: 6102116
    Abstract: A locking device has a lower concave housing suitable to receive and hold an upper end of an element to be attached to a drill stem. The housing forms a conical surface. A number of blocks slides along the conical surface. Each block has an outside sliding surface that is parallel to the conical surface and has an inside surface suitable to engage the elements to be held. The blocks are mounted to slide along the conical surface. The blocks are moveable from a first, free position in which the blocks are pushed toward the lower, outside surface of the conical surface to a second, locked position in which the blocks are radially clamped against the element to be hold.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: August 15, 2000
    Assignee: Soilmec S.p.A.
    Inventor: Riva Giovanni