Patents by Inventor Hendricus G. de Waal

Hendricus G. de Waal 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).

  • Self-closing clamping apparatus
    Patent number: 5263796
    Abstract: A clamping apparatus for lockingly engaging and supporting a length of conduit, such as a pipeline span extending above an irregular seabed. The clamping apparatus includes a saddle shaped to overlie the conduit span to be supported and a frame straddling the saddle and pivotably coupled thereto. The saddle includes clamps which automatically swing to a closed position when the saddle is seated on the conduit. The frame has extensible legs for supporting the conduit on an underlying support surface, such as a sandy seabed.
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: November 23, 1993
    Assignee: Canadian Rubber & Steel Ltd.
    Inventor: Hendricus G. de Waal