Patents by Inventor Pieter Jacobus J. Van Wamelen

Pieter Jacobus J. Van Wamelen 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).

  • Method and system for winning minerals
    Patent number: 3961824
    Abstract: A sectional scraper device which is foldable in zig-zag position by remote pulling means and which can be let down through a clad bore hole and can be deviated to follow layers of mineral to be mined by a to and fro movement of the scraper device combined with transport of loosened minerals by liquid circulation through the bore hole. The scraping action may be strengthened by the action of liquid jets emanating from the scraper device.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: June 8, 1976
    Inventors: Wouter Hugo Van Eek, Henri Marie Boers, Arnold Willem J. Grupping, Pieter Jacobus J. Van Wamelen, Willem Christian Rehm