Patents by Inventor Christopher A. Williston

Christopher A. Williston 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: 6935436
    Abstract: A double-headed tent stake driver and puller having twin release levers for inserting and removing tent stakes, nails and the like is described. The tent stake driver and puller includes a slide hammer and a coupler mounted on the distal end of the slide hammer shaft. The coupler has an elongate body with an open end and a hollow core sized to receive the head of the stake or nail intended for use with the present invention. The coupler includes a pair of retractable keepers slidably received within a corresponding pair of slots. The keepers provide the twofold benefits of retaining the stake once inserted into the coupler, and presenting a surface for imparting the extraction force upon a stake to be pulled from the ground. A pair of spring loaded release levers are provided to enable one-handed retraction of the keepers for receipt of the tent stake. When released, the spring loaded release levers return the keepers to a ciosed position, retaining the stake therein.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: August 30, 2005
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Christopher A. Williston
  • Patent number: 6932164
    Abstract: A double-headed tent stake driver and puller is provided for inserting and removing tent stakes, nails and the like. The double-headed tent stake driver and puller includes a slide hammer and a coupler mounted on the distal end of the slide hammer shaft. The coupler has an elongate body with an open end and a hollow core sized to receive the head of the stake or nail intended for use with the present invention. The coupler includes a retractable keeper slidably received within. The keeper provides the twofold benefits of retaining the stake once inserted into the coupler, and presenting a surface for imparting the extraction force upon a stake to be pulled from the ground. The keeper is urged to its closed position by a spring.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: August 23, 2005
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Christopher A. Williston