Patents by Inventor Charles Butterworth

Charles Butterworth 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: 6866120
    Abstract: A portable tree stand for use with non-vertical trees provides standing and seating platforms that may remain parallel and may be adjustable. Adjustments include a slidable seat platform and a slidable standing platform that may be extended to allow adequate seating and standing space to compensate for tree trunks that diverge from the vertical. Additionally, the distance, or height, between the standing platform and the seating platform maybe varied. A threaded chain tensioner tightens a chain around the tree helping hold the stand to the tree, and optionally a tree screw secures attachment to the tree trunk. An adjustable seat support post establishes a parallelogram relationship between the seat platform and the standing platform such that an angular relationship, which may be parallel or non-parallel, may be maintained between the seat platform and the standing platform.
    Type: Grant
    Filed: August 20, 2003
    Date of Patent: March 15, 2005
    Inventor: Charles Butterworth
  • Publication number: 20050039985
    Abstract: A portable tree stand for use with non-vertical trees provides standing and seating platforms that may remain parallel and may be adjustable. Adjustments include a slidable seat platform and a slidable standing platform that may be extended to allow adequate seating and standing space to compensate for tree trunks that diverge from the vertical. Additionally, the distance, or height, between the standing platform and the seating platform maybe varied. A threaded chain tensioner tightens a chain around the tree helping hold the stand to the tree, and optionally a tree screw secures attachment to the tree trunk. An adjustable seat support post establishes a parallelogram relationship between the seat platform and the standing platform such that an angular relationship, which may be parallel or non-parallel, may be maintained between the seat platform and the standing platform.
    Type: Application
    Filed: August 20, 2003
    Publication date: February 24, 2005
    Inventor: Charles Butterworth