Patents by Inventor Norman H. Carlsen, Jr.

Norman H. Carlsen, Jr. 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).

  • Seal for gate valve liners
    Patent number: 4951919
    Abstract: The collar of a one piece liner for a gate of a gate valve includes inwardly sloping entry surfaces for urging packing compressed by a packing gland against the gate to effect a seal about the gate without an increase of packing gland pressure. Bead seals disposed upon the inwardly sloping surfaces cooperate with the packing to prevent leakage intermediate the sloping surfaces and the packing. Further bead seals extending about the interior of the throat of the chest bear against the gate to serve a sealing function and to discourage migration of the packing into the throat.
    Type: Grant
    Filed: April 18, 1989
    Date of Patent: August 28, 1990
    Assignee: Newcon Company
    Inventors: Raymond E. Haglund, Norman H. Carlsen, Jr.