Buoys – rafts – and aquatic devices – Water skimming or walking device – Water walking device
Patent
1991-08-05
1993-03-09
Swinehart, Edwin L.
Buoys, rafts, and aquatic devices
Water skimming or walking device
Water walking device
440 17, 440 21, B63B 3583
Patent
active
051922371
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to aquatic skis, in general. More particularly, the present invention relates to self-propulsive and self-supportive skis.
BACKGROUND ART
Aquatic ski of different gender, in which a first kind includes essentially two longitudinal floating elements being over each one a place for foot are instead known. The enlivening of said ski is made by the user who, acting with the arms movement imprints laterally a pushing force as floating rackets. Being this solution totally afunctional, in a further solution, the foot seat is substantially modified realizing an anterior hinging, of the kind of the usual on ground ski, allowing better utilization of muscular force and increased speed.
Further solution is disclosed in U.S. Pat. No. 3,833,956 (John F. Mehan) in which a water skate for each foot including a buoyant hull structure is disclosed. Each hull has a vertically pivotable foot support mounted within a well in the hull. Movement of the foot support actuates a lever arm which is fixedly secured to the foot support and extends rearwardly beneath the hull and terminates in a horizontally disposed blade. The blade reciprocates through the water as it is moved by the pivotal movement of the foot support and reacts with the water to provide forward movement of the hull on both the upward and downward motion.
This solution provides an efficient propulsion of advancement without needing advancement arm propulsion means, nevertheless, the proposed propulsion means are not so efficient providing an effective resistance in the respective movement of its propulsion blade.
FR-A1-2481939 (COMPARON JEAN DANIEL) discloses downwards fixed hinged blades acting like fish fins that oscillates from a position parallel to the bottom of the hull to a more or less inclined position to realize resistance in the water in rear direction, the apparatus being further inflatable and foldable by intermediate hinging in order to store it in a reduced dimension. This solution is simpler than the first one but the sole rearward movement is not sufficient to realize a real reaction in advancement, because a certain "Hysteresis" happens before the resistance realized by the open blades transmit their reaction. For this reasons such solutions have not satisfied the exigencies of an appreciable utilization.
SUMMARY OF THE INVENTION
The purpose of the present invention as claimed solves the problem realizing a symmetrical pair of aquatic ski movable by human propulsion, generated by deambulation (walking), each aquatic ski being inflatable and pliable, realizing each one a floating table to support hydrostatically and hydrodynamically the human weight and centrally supporting an end hinged foot articulated to an upper hinged oscillating movable fin propeller in order to give the necessary pushing for advancement for each aquatic ski including:
for one foot, a floating hull;
propulsive oscillating means associated with the respective hull, comprising an upper central oscillating foot seat cooperating and articulated to an intermediate hinged underlying movable fin means, said fin means being proportionally oscillating from upward position to downward horizontal position, adjacent to the respective hull characterized in that said propulsive oscillating fin means comprises a free pivotable oscillating vane means pivotable into a couple of oscillating parallel arms from a position aligned with said arms for causing resistance to advancement to a position free oscillating parallel to the flue of the passing water between them.
The advancement is so achieved by deambulation (walking) on the water allowing to across rivers and lagoons etc.
The advantages so achieved realize an extremely creative technical progress.
The pair of skis being pliable and inflatable are further easily transportable anywhere.
The easy walking facilitates aquatic excursions and widening, choosing any desired itinerary or trekking activity without obstruction by water barriers.
The idea is born by the ancient dream of the man to
REFERENCES:
patent: 3833956 (1974-09-01), Meehan
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