Patents by Inventor Arthur A. J. M. Van Hooijdonk

Arthur A. J. M. Van Hooijdonk 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).

  • Gate valves and methods of connecting same
    Patent number: 5285951
    Abstract: A method of connecting pipes to a gate valve assembly includes the steps of turning a wedge-shaped valve member having a heat sensitive sealing disc to a fully open position so that the disc is further away from a weld seam than when the disc is in a closed position. A pipe is then sealed to the gate valve assembly while the heat sensitive sealing disc is in the open position. Heat from the sealing operation is thus prevented from damaging the heat sensitive sealing disc.
    Type: Grant
    Filed: February 3, 1992
    Date of Patent: February 15, 1994
    Assignee: R.M.I. Holland B.V.
    Inventors: Andreas P. A. Dierikx, deceased, by Johannes Kranenburg, legal representative, Arthur A. J. M. Van Hooijdonk