Patents by Inventor .ANG.ke T. Eklof

.ANG.ke T. Eklof 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).

  • Thread structure for percussion rock drilling
    Patent number: 4687368
    Abstract: A thread structure for interconnecting two elements in a percussion drill string comprising an interior cylindrical thread and an exterior cylindrical thread. The threads have abutting flanks which are straight along their abutting contact portions. The clearance (a) between the bottom portion of the exterior thread and the crest portion of the interior thread is large enough to ensure that contact does not arise at said clearance when the threads are worn.
    Type: Grant
    Filed: April 3, 1986
    Date of Patent: August 18, 1987
    Assignee: Santrade Limited
    Inventors: .ANG.ke T. Eklof, Harry A. I. Wiredal