Patents by Inventor Harold N. Simpson

Harold N. Simpson 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).

  • Threadably engaged locking mechanism
    Patent number: 4619122
    Abstract: A two-part threaded locking mechanism is provided with complementary stop elements in the form of a pin and a recess that interengage when the two lock elements are threaded together. When used as a padlock, the locking mechanism may be encased in a tapered, spinnable, protective shroud. To facilitate assembly, the recess may be made larger than the pin and the surface adjacent the recess facing the pin may be spirally ramped.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: October 28, 1986
    Inventor: Harold N. Simpson
  • Locking pin
    Patent number: D292667
    Type: Grant
    Filed: March 13, 1985
    Date of Patent: November 10, 1987
    Inventor: Harold N. Simpson