Body sail

{
  "publication_number": "US3877406A",
  "country": "US",
  "kind": "A",
  "title": "Body sail",
  "abstract": "A small, lightweight sailboat comprising two floats, a horizontal frame to hold the floats, a vertical mast, a mainsail boom, a jib boom, a mainsail, a jibsail and rigging. The sailboat is used to pull a person through the water. The sailboat is so constructed as to allow both sails to be furled easily and quickly. A certain amount of skill is required to keep the sailboat stable which makes it attractive for sport.",
  "claims": [
    "1. A sailboat comprising a horizontal frame having three parallel rods of equal length running in a forward to aft direction, a first of said rods defining the port side and a second of said rods defining the starboard side of said sailboat, a third of said rods midway between said first and second rods defining a centerline of said sailboat, said three rods being fastened at their respective ends to front and rear cross rods running perpendicular to said three rods by fitting means, two additional rods extending forward from said port and starboard side rods beyond said front cross rod, one end of each said additional rod being connected to said respective port and starboard side rods and the other end of each said additional rod meeting at a junction on said centerline of said sailboat, said junction defining the front of said frame and said rear cross rod defining the rear of said frame; a pair of low density floats fastened beneath said port and starboard side rods; a vertical mast fastened at one end to said frame at a junction of said third rod and said forward cross rod, said mast being formed with an eyelet at its other end; a tapered mainsail boom; a triangular mainsail; said mainsail being attached to said mast and said mainsail boom; the narrow end of said tapered mainsail boom being attached to said mast by a three degree of freedom swivel joint and a pulley being attached to the wide end of said tapered mainsail boom; a jibsail boom being attached to said front of said frame by a hinge means, said jibsail boom extending aft beyond said forward cross rod and encompassed by said forward cross rod and a guide rail attached below said forward cross rod; said jibsail boom being rotatable about its longitudinal axis; a triangular jibsail having one side attached to said jibsail boom and an apex of said triangular jibsail opposite said one side of said jibsail being attached to one end of a rope; said rope passing from said jibsail through said eyelet, around said pulley, and back to said eyelet where the opposite end of said rope is fastened; as said jibsail boom is rotated said jibsail is furled around said jibsail boom thereby pulling and moving said one end of said rope toward said jibsail boom, upon said movement said rope furling said mainsail around said mainsail boom and pivoting said mainsail boom upwardly toward said mast.",
    "2. A sailboat as defined in claim 1, wherein a lanyard being attached to said mainsail boom and passing through a loop at one end of said third rod said lanyard terminating in a handle, said handle being formed with a hook adapted to be fastened to any of several loops attached at points along said third rod.",
    "3. A sailboat as defined in claim 1, wherein a spring wind-up means being incorporated with said jibsail boom to rotate said jibsail boom."
  ],
  "cpc": [
    "B63H 9/1042",
    "B63H 2009/1057",
    "B63H 9/04"
  ],
  "assignees": [
    "DAVIS MANFRED"
  ],
  "filing_date": "1972-07-31",
  "publication_date": "1975-04-15",
  "grant_date": "1975-04-15",
  "priority_date": "1972-07-31",
  "application_number": "US-27684372-A",
  "family_id": "23058292",
  "citations": [
    "US2858788A",
    "US3077850A",
    "US3260230A",
    "US3438349A",
    "US3608511A",
    "US3656445A"
  ]
}