Patents by Inventor Pieter van de Werken

Pieter van de Werken 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).

  • Gripping and skidding apparatus
    Patent number: 4215848
    Abstract: Gripping and skidding device for skidding modules placed on the platform of a marine drilling rig by a crane. The apparatus is arranged to hydraulically engage the top plate of a girder by at least two opposed gripping units each having gripping faces relatively narrow and short relative to the top plate, and preferably one of which is formed by the surface of a gripping beam mounted for pivoting movement on a universal hinge, thereby ensuring, among other advantages, optimum clamping capacity even if the top plate is warped.
    Type: Grant
    Filed: August 29, 1978
    Date of Patent: August 5, 1980
    Assignee: MacGregor International S.A.
    Inventor: Pieter van de Werken