Patents by Inventor Thomas H. Persons

Thomas H. Persons 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).

  • Patent number: 4794769
    Abstract: Apparatus for lockably securing the threaded ball of a ball-type trailer hitch to the hitch tongue. A first laminated washer-like assembly, including a locking hasp and recess, is boltably secured with the ball to the hitch tongue. A cap member, including a mating hasp portion, mounts into the washer recess to receive a padlock and protect the otherwise unprotected end of the ball fastener.
    Type: Grant
    Filed: November 20, 1987
    Date of Patent: January 3, 1989
    Inventor: Thomas H. Persons
  • Patent number: 4636007
    Abstract: Apparatus mounting to the bearing containing hub of a wheeled vehicle and accessible from the front of each wheel for lubricating the inner and outer wheel bearings. A first zerk fitting and pressure relief valve coupled to the outside of the hub assure the lubrication of the outer bearing. A second zerk fitting mounting through the wheel rim and backing plate and opening to a grease conveying channel at the interior or the hub adjacent the inner bearing assure the lubrication thereof. In various alternative embodiments, the grease conveying channel is incorporated into appurtenant lug bolts, threaded studs, hollow wheel cavities and tubular extensions.
    Type: Grant
    Filed: September 6, 1985
    Date of Patent: January 13, 1987
    Inventor: Thomas H. Persons