Patents by Inventor David L. Doty

David L. Doty 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).

  • Tube coupling locking device
    Patent number: 5490693
    Abstract: A tube coupling locking assembly for preventing undesired loosening of a make-up coupling includes a cooperating pair of rigid lock members that encircle about a coupling nut with one of the lock members having an end connected to a second cooperating coupling nut or the body of an associated fluid device. The cooperating lock members are arranged to prevent relative rotation between the encircled coupling nut and the cooperating coupling nut or associated fluid device.
    Type: Grant
    Filed: September 28, 1994
    Date of Patent: February 13, 1996
    Assignee: Cajon Company
    Inventors: Ronald K. Fisher, Gerald A. Babuder, David L. Doty