Patents by Inventor Kevin Kelsey

Kevin Kelsey 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).

  • Lifting fin
    Patent number: 5809926
    Abstract: A sloped hydrofoil (22) is mounted to the bottom of a sailboard or surfboard vertical strut (26) using a hinge joint (24). Hinge joint (24) allows reversal of sloped hydrofoil (22) slope in response to a hull (30) side slip. Efficient sloped hydrofoil (22) supports a portion of craft weight to reduce hull (30) drag.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: September 22, 1998
    Inventor: Kevin Kelsey
  • Corner reefing sail
    Patent number: 5638763
    Abstract: A sailing rig (20) has a sail cloth (26) adjustable in area by folding of the aft corner of sail (26), a clew sail (38). Sail cloth (26) is redesigned so clew sail (38) is not a structural part of rig (20) so it can be reefed without altering the remainder of rig (20).
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: June 17, 1997
    Inventor: Kevin Kelsey
  • Lifting fin
    Patent number: 5622134
    Abstract: A sloped hydrofoil (22) is mounted to the bottom of a sailboard or surfboard vertical strut (26) using a hinge joint (24). Hinge joint (24) allows reversal of sloped hydrofoil (22) slope in response to a hull (30) side slip. Efficient sloped hydrofoil (22) supports a portion of craft weight to reduce hull (30) drag.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: April 22, 1997
    Inventor: Kevin Kelsey