US2685696A - Water scooter - Google Patents

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US2685696A
US2685696A US263191A US26319151A US2685696A US 2685696 A US2685696 A US 2685696A US 263191 A US263191 A US 263191A US 26319151 A US26319151 A US 26319151A US 2685696 A US2685696 A US 2685696A
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water
scooter
body
operator
water scooter
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William H Oscanyan
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William H Oscanyan
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
    • B63B35/00Vessels or like floating structures adapted for special purposes
    • B63B35/73Other vessels or like floating structures for pleasure or sport
    • B63B35/81Waterskis; Watersledges
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
    • B63B1/00Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/04Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull

Description

Aug. 10, 1954 w. OSCAN YAN WATER SCOOTER 2 Sheets-Sheet 1 Filed Dec. 26, 1951 INVENTOR. WILLIAM H OSCANYAN ATTORNEY Aug. 10, 1.954 w. H. OSCANYAN WATER SCOOTER 2 Sheets-Sheet 2 Filed Dec. 26, 1951.

INVENTOR. WILLIAM H. OSCANYAN BY ATTORNEY Patented Aug. 10, 1954 UNITED STA WATER SCOOTER 6 Claims.

This invention relates in general to aquaplanes, water skis and similar water sport devices designed to be ridden when drawn along on the surface of the water.

More specifically, this invention relates to a board which, in a measure, combines the features of aquaplane and water skis as a ridable aquatic amusement device while also providing additional novel features including unusual maneuverability and which, for want of a better term, I designate as a water scooter.

An object or the present invention is to provide a device of the character above indicated which will be ridable and maneuverable and which, even when towed at a moderate rate of speed in the water, thus for example, when towed by a boat powered with a '7 /2 horse power outboard motor, will offer opportunity for the development of water sport skill and will offer thrills to the rider without requiring the necessarily higher horse power motors to produce speeds heretofore found necessary for water skiing or aquaplaning, but which can also be operated with a moderate amount of skill at the customary water skiing high speeds if desired.

Another object of the invention is to provide a water scooter capable of being ridden and maneuvered preferably when the rider is in a sitting position, but also capable of being operated similarly by the rider in a standing position, with the latter position requiring slightly more skill.

A further object of the invention is to provide a novel water scooter for use on the surface of the water which, while being towed over the water, can be guided and maneuvered by the rider so as to be caused to follow various zig-zag paths and curves at various degrees of angularity with respect to the direction of travel of the towing boat and in this way offerin opportunities for increased skill and thrills.

An important object of the invention is to provide an improved board capable of ofiering ampie opportunities for thrilling water sports but the operation of which will not subject the rider to any dangerous hazards.

An additional object of the invention is to provide a water sport device of the type described.

which will be relatively simple and practical in construction and which can be manufactured for sale at moderate cost.

The means by which and the manner in which the above objects are attained with my invention, and the nature, construction and method of operation of my improved water scooter will be readily understood from the following description and explantion, in which reference is to be made to the accompanying drawings.

In the drawings, which are more or less diagrammatic:

Fi l is a side elevation of one form in which my water scooter may be made;

Fig. 2 is a top plan view of the water scooter of Fig. 1;

Figs. 3, 4, 5, 6 and 7 are transverse sectional elevations taken on lines 33, 3-4, 55, 6-6 and 'i'i respectively of Figsl and 2 and looking in the direction indicated by the arrows;

Fig. 8 is a section on line 8-3 of Fig. 2;

Fig. 9 is a section on line 9-9 of Fig. 2;

Fig. 10 is a plan view or" a slightly modified form in which my water scooter may be made;

Fig. 11 is a plan view of a further modified form of my invention; and

Fig. 12 is a side elevation of the water scooter formed as shown in Fig. 11.

My water scooter may be made from a single solid block of light wood such as balsa wood, for example, or it may be made in the form of a hollow, completely enclosed and water tight structure either from molded plastic, aluminum, or from plywood secured to suitable interior reinforcing members so as to form a strong as well as a light weight buoyant and water tight structure. For the purpose of this description it is assumed that the water scooter as illustrated will be constructed of plywood, and this is probably my preferred construction, but my invention is not to be understood to be limited to the use of any particular material nor are the structural details to be understood as necessarily limited to those described and illustrated otherwise than as provided for in the claims.

In general my water scooter comprises an elongate-d buoyant structure the front half or front section of which is more or less boat-shaped and has a specially-shaped generally V-bottom bow portion resemblin to a limited extend the bow of a boat by tapering forwardly to a prow and downwardly to a keel. The rear half constitutes the stern section and is reduced both in width and in depth relative to the front section and resembles an aquaplane or the like. The structure has a substantially flat top deck, but with the deck sloping upwardly near the bow and with a foot rest at each side near the rear of the front section and just inboard of the widest part of the structure. It will thus be seen that the device has in combination with the generally pointed bow portion a generally fiat stern section.

Referring first to Figs. 1 to 7 inclusive, l B indicates the top deck, ii and ill the sides, is the stern end and i l bottom. Cross ribs to, ill, I? and it, shown in Figs. 5, 6 and '7 respectively, constitute supports for deck, sides and bottom, and preferably such rios are made with spaced holes as shown in order to avoid any unnecessary weight these members.

The general shape of the sides and bottom of the board will be apparent from Figs. 1 to 7 inclusive. is to be noted that the downward inward slope of the sides decreases rearwardly and that the sides become substantially perpendicclar to the deal: in the rear portion of the front section and continue so to the stern end as apparent from Figs. 5, i and The depth of the water scoote from the top deck to the center line along the bottom, decreases, preferably constantly, from bow to stern end, as apparent from Fig. l. The bottom flattens in cross Section progressively rearwardly from the f-shaped bow. the bottom is in the stern section of the scooter substantially flat in cross section.

A center keel or fin iii- (Fig. 1) extends for a short distance on the bottom in the rear portion of the front section of the scooter and a second keel or fin to extends forward for a short distance from the the bottom.

The foot rests constitute a necessary and important feature of the present invention and, basically, comprise foot bearing surfaces 2t which are inclined downwardly and rearwardly from the top deck it at the rear of the front section and against which the operators feet bear when he is seated on the stern section and by which the operator controls the maneuvering of the water scooter. In the preferred form illustrated, the foot rests comprise a pair of foot control recesses, indicated general by the reference character 2!, in the top deck at opposite sides of "no water scooter and are positioned at the widest part of the. water scooter, as previously men tioned and as shown in Fig. 2. Each foot con trol recess is formed with an inner substantially vertical side wall 22, preferably paralle1 to the I L dinal center line of the scooter, and an outer side wall sloping obliquely upwardly and outwardly (Fig. 9), positioned slightly nearer to the inner side wall at the rear of the foot control recess than at the front closely as possible to the respective side wall of the water scooter. The bottom of the foot control recess comprises three sections, namely the foot bearing forward section (Figs. 2 and 8) sloping upwardly and forwardly, a center or substantially horizontal section 25, and the aft section sloping upwardly and rearwardly and preferably at a less angle of inclination than the forward section and consequently somewhat longer than the forward section. The reasons for this preferred shape for the foot control recesses will be understood presently.

In riding the water scooter in the customary and preferred sitting position, the operator sits on the stern section of the deck with the feet in the foot control recesses. The soles of the operators feet are placed against the forward sections 2 1 of the foot control. recesses respectively with the heels resting on the bottom sections 325. The rearwardly sloping aft sections 26 control recesses will then allow space and passageway for the back of the Operators legs.

A chock El (Fig. '7) is mounted on the front tip of the deck, and the tow rope (not shown), by which the water scooter and rider on the water stern end along the center line of (Fig. 2) and located of the foot scooter are towed, passes through this chock at the start. The chock 2'! is preferably specially shaped, as shown in the drawings, with each side sloping upwardly to the center in which the ropeholding slot is located. Thus the tow rope, when held down at deci: level by the operator, can easily slide into the chock groove from either side, and, when the rope is raised above the deck level by the operator, will be lifted out of the chock groove.

At the start the operator causes the tow rope to move into the check 2? and holds the tow rope handle or end down at the deck level. This causes the tow rope to stay in the chock and causes the water scooter to follow the towing boat in a straight path while the towing boat and water scooter gain speed. Preferably a tow rope of from to feet long is recommended since this will enable the operator, as soon as the water scooter attains moderate speed, to maneuver the water scooter outside of the wake and waves of the towing boat and to follow a wide range of oblique and zig-zag courses with ample opportunity for the development of skill and the attenuing water sport thrills. As soon as the water scooter attains sufiicient speed to enable the operator to maintain balance the operator raises his end of the tow rope. This lifts the rope out of the check 2i and the water scooter is then maneuverable according to the desire and skill of of the operator. Foot pressure in the foot control recesses enables the rider to pivot the water scooter at the point where he is seated.

As will be evident, the power which propels the water scooter is transmitted from the tow rope through the operators points of contact with the ski board. The greater proportion of the power in any event will of course be transmitted through the soles of the operators feet. For this purpose the upwardly sloping forward sections 24 of the foot control recesses provide a proper as well as comfortable brace for the operators feet. Turning of ski board may be accomplished in several ways. Leaning to one side or applying more downward pressure by the foot on one side than on the other, so as to cause the water scooter to tip to one side, will cause the water scooter to turn to that side since the lower side at the wide middle portion of the water scooter will create greater resistance to the water than the raised opposite side of the wide middle portion. A sharp flat turn at high speed can be made by the operator (in sitting position) by a side thrust in the desired direction by both feet, urging the feet against the respective side walls of the foot rests.

The center heel or stabilizer 19 reduces the tendency for the Water scooter to skid when making a turn, and the rear keel or stabilizer 20 prevents any tendency to steer too far and to have the water scooter turn end for end during a sharp curve. The formation of the bottom of the water scooter, thus the stern section with the bottom flat in cross section and the bottom contour of the front section, enables the water scooter to present a planing surface to the water, the angle of which planing surface can be adjusted to the speed by the extent of backward lean on the part of the operator, and the contour of the bow enables the bow to be lifted to a limited extent under the control of the operator when skimming over the water.

While the foot control recesses it provide a firm and comfortable foot hold and keep the feet from slipping inadvertently sidewise out of the foot control recesses no part of the foot rests extends above the top deck of the bow or front section. Thus, in the event of the overturning of the water scooter, the operator can slip freely away from the board. There is nothing on which or by which the operator can be caught when slipping off of the scooter and there is nothing on the scooter from which the operator might receive injury.

In the slightly modified form of my water scooter shown in Fig. the sides 28 and 29, instead of converging constantly towards each other throughout the stern section of the water scooter, are formed with a break about half way in the stern section so that the remaining portions 28 and 29' then extend parallel to each other to the stem end. As a result the water scooter of Fig. 10 has a wider stern section than that of Fig. In all other respects the water scooter of Fig. 10 and the water scooter of Fig. 2 are the same, and the side Walls 28, 2 8, 29, 29 of the water scooter of Fig. 10 are perpendicular to the top deck preferably throughout the entire extent.

In the modified form of my water scooter illustrated in Figs. 11 and 12 the side walls and SE of the front section of the water scooter are brought in towards each other as shown at at and 3| at the rear of the front section immediately behind the foot control recesses. The side walls 32 and 33 of the stern section of the Water scooter are parallel to each other throughout their entire extent to the stern end of the water scooter. The abrupt change in the width of the water scooter immediately aft of the foot control recesses, in this modified form of my water scooter, intensifies somewhat the turning effect produced by the tipping of the water scooter to one side or the other, but in all other respects the water scooter in this modified form is the same as the water scooter of Fig. 2.

Other minor modifications could be made in my water scooter without departing from the principle of my invention and within the scope of the claims. It is essential, however, in the carrying out of my invention that foot control recesses be provided at the sides, at the widest part of the water scooter, preferably not aft of the longitudinal middle point, and that the stern section of the water scooter be considerably narrower than that portion of the front section in which the foot control recesses are located.

I claim:

1. A water scooter to be towed by a power boat and adapted to be ridden by an operator in seated position, comprising an elongated buoyant body having a generally V-bottom bow portion and a generally flat stern section, said bow portion including the widest part of said body and tapering forwardly to a prow and downwardly to a keel, said stern section having a substantially fiat bottom extending contiguously and merging with the rear of the bottom of said bow portion, a top deck on said body including a seating surface over said stern section, and foot rest means on said body in front of said seating surface and approximately at the rear of said bow portion, said foot rest means being inclined upwardly and forwardly to accommodate the soles of the feet of an operator seated on said seating surface to transmit thrust to said body through the operator from a tow line, whereby said body may be driven and the direction of travel controlled by selective pressure on said foot rest means.

2. A water scooter to be towed by a power boat and adapted to be ridden by an operator in seated position, comprising an elongated buoyant body having a generally V-bottom bow portion and a generally fiat stern section, said bow portion including the widest part of said body and tapering forwardly to a prow and downwardly to a keel, said stern section having a substantially flat bottom extending contiguously and merging with the rear of the bottom of said bow portion, and a continuous top deck on said body sloping upwardly at the front to said bow and having a seating surface on said stern section, said body having recesses opening through said top deck, said recesses being disposed in front of said seating surface and adjacent the juncture of said bow portion and stern section, foot rests in the forward ends of said recesses and sloping upwardly and forwardly to said top deck to accommodate the soles of the feet of an operator seated on said seating surface and to transmit thrust to said body through the operator from a tow line, said foot rests being disposed entirely below the top deck to free said deck of obstructions and permit the operator to slide therefrom, whereby said body may be driven and the direction of travel controlled by selective pressure on said foot rests.

3'. A water scooter to be towed by a power boat and adapted to be ridden by an operator in seated position, comprising an elongated buoyant body having a generally V-bottom bow portion and a generally flat stern section, said bow portion including the widest part of said body and tapering forwardly to a prow and downwardly to a keel, said stern section being narrower than said widest part and having a substantially flat bottom extending contiguously and merging with the rear of the bottom of said bow portion, a deck on said body and having a seating surface on said stern section, foot rest means on said body in front of said seating surface and adjacent the juncture of said bow portion and stern section, said foot rest means sloping upwardly and forwardly to accommodate the soles of the feet of an operator seated on said seating surface and to transmit thrust to said body through the operator from a tow line, and a chock on said deck at said prow and having upwardly and inwardly sloping sides terminating in a central vertical open-topped slot with substantially parallel side walls for removably receiving a tow line to guide the body during the towing thereof.

4. A water scooter to be towed by a power boat and adapted to be ridden by an operator in seated position, comprising an elongated buoyant body having a generally V-bottom bow portion and a generally flat stern section, said how portion including the widest part of said body and tapering forwardly to a prow and downwardly to a keel, said stern section being narrower than said widest part and having a substantially flat bottom extending contiguously and merging with the rear of the bottom of said bow portion, a continuous deck on said body sloping upwardly at the front to said bow and having a seating surface on said stern portion, said body having recesses opening through said top deck, said recesses being disposed in front of said seating surface and adjacent the juncture of said bow portion and stern section, foot rests in the forward ends of said recesses and sloping upwardly to said top deck to accommodate the soles of the feet of an operator seated on said seating surface and to transmit thrust to said body through the operator from a tow line, said foot rests being disposed entirely below the top deck to free said deck of obstructions and permit the operator to slide therefrom,

and a chock on said top deck at said prow and having upwardly and inwardly sloping sides terminating in a central vertical open-topped slot with substantially parallel side walls for removably receiving a tow line to guide the body during the towing thereof.

5. A water scooter to be towed by a power boat and adapted to be ridden by an operator in seated position, comprising an elongated buoyant body having a generally V-bottoni bow portion and a generally flat stern section, said bow portion including the widest part of said body and tapering forwardly to a prow and downwardly to a keel, said stern section being narrower than said widest part and having a substantially fiat bottom extending contiguously and merging with the rear of the bottom of said bow portion, a top deck on said body and having a seating surface on said stern section, foot rests on said body in front of said seating surface, said foot rests sloping upwardly and forwardly to accommodate the soles of the feet of an operator seated on said seating surface and to transmit thrust to said body through the operator from a tow line, said foot rests being disposed adjacent the sides of said body and the juncture of said bow portion and stern section to enable control of said body by selective pressure on said foot rests, a keel portion extending rearwardly from the bow portion keel and depending from the front of the stern section bottom to prevent lateral skidding of said body on the water when making turns, and a keel portion depending from the rear of the stern section bottom to prevent swinging of said body on the water when making turns.

6. A water scooter adapted to be ridden by an operator in seated position, comprising an elongated buoyant body having a generally V-bottom bow portion and a generally flat stern section, said bow portion including the widest part of said body and tapering forwardly to a prow and downwardly to a keel, said stern section being narrower than said widest part and having a substantially fiat bottom extending contiguously and merging with the rear of the bottom of said bow portion, a continuous top deck on said body sloping upwardly at the front to said prow and having a seating surface on said stern section, said body having recesses opening through said top deck, said recesses being disposed in front of said seating surface and adjacent the juncture of said bow portion and stern section, foot rests in the forward ends of said recesses and sloping upwardly and forwardly to said top deck to accommodate the soles of the feet of an operator seated on said seating surface and to transmit thrust to said body through the operator from a tow line, said foot rests being disposed entirely below the top deck to free said deck of obstructions and permit the operator to slide therefrom, a short keel extending rearwardly from the bow portion keel and depending from the front of said stern section bottom to prevent lateral skidding of said body on the water when making turns, a second short keel depending from the rear of said stern portion bottom to prevent swinging of said body on the water when making turns, and a chock on said top deck at said prow said chock having upwardly and inwardly sloping sides terminating in a central vertical open-topped slot having parallel side walls for reniovably receiving a tow line to guide said body directly from the tow line during the towing of said body.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 227,340 Wright May 4, 1380 635,085 Varnum Oct. 17, 1899 1,559,390 Waller Oct. 27, 1925 1,839,015 Carmichael Nov. 3, 1931 1,918,508 Wheeler July 18, 1933 2,286,350 Drake June 16, 1942 2,379,318 Lake Feb. 27, 1945 2,412,474 Scott-Paine et al. Dec. 10, 1946 2,488,963 Clark Nov. 22, 1949 2,544,794 Kelley et al Mar. 13, 1951 2,577,917 Root Dec. 11, 1951 FOREIGN PATENTS Number Country Date 753,711 France Oct. 23, 1933 929,149 France Dec. 17, 194'? e, an n,

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2762063A (en) * 1953-04-02 1956-09-11 Quinn Jack Harvie Aqua disk
US2958875A (en) * 1957-09-06 1960-11-08 David H Mcclain Prow-shaped water sled with manually operated steering apparatus
US3031696A (en) * 1958-12-19 1962-05-01 William E Brabb Water ski
US3050751A (en) * 1959-07-20 1962-08-28 Robert R Moon Boat structure
US3064286A (en) * 1958-02-03 1962-11-20 Lauren E Hammond Water vehicle
US3064838A (en) * 1959-04-30 1962-11-20 Carl F Doerfler Boat aligner
US3082443A (en) * 1960-06-06 1963-03-26 Kimura Tak Aqua-sled
US3103019A (en) * 1961-07-06 1963-09-10 Freire Edward Method of fabricating a hull and the product hull
US3145400A (en) * 1963-04-08 1964-08-25 John D Yoakum Marine vehicle
US3665532A (en) * 1970-03-27 1972-05-30 Lawrence V Simpson Watercraft
US3777325A (en) * 1972-12-26 1973-12-11 W Bristol Water craft
US3950807A (en) * 1973-11-16 1976-04-20 Sharpe Roderick P Water ski
US4194458A (en) * 1976-11-16 1980-03-25 Lotte Kronwitter, nee Staiber Windsurfer with auxiliary propulsion equipment
FR2443377A1 (en) * 1978-12-07 1980-07-04 Meritor floating craft
US4361103A (en) * 1980-12-12 1982-11-30 Willat Bret G Water sled device
US5582529A (en) * 1994-03-03 1996-12-10 Montgomery; Robert E. High performance motorized water ski
US20130178122A1 (en) * 2009-10-30 2013-07-11 Lester LeBlanc Drop-knee board

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US227340A (en) * 1880-05-04 Carriage
US635085A (en) * 1899-07-21 1899-10-17 James A Varnum Hawser-indicator.
US1559390A (en) * 1925-08-22 1925-10-27 Waller Fred Aquaplane
US1830015A (en) * 1931-02-09 1931-11-03 Norman F Carmichael Surfboard pontoon structure
US1918508A (en) * 1932-01-21 1933-07-18 William L Wheeler Water sled or surf board
FR753711A (en) * 1933-03-28 1933-10-23 water sports equipment
US2286350A (en) * 1940-07-01 1942-06-16 Theodore R Drake Aquatic device
US2370318A (en) * 1943-10-28 1945-02-27 George B Cluett Displacement-hydroplane boat
US2412474A (en) * 1945-05-08 1946-12-10 Scott Paine Device facilitating walking on mud
FR929149A (en) * 1946-06-15 1947-12-17 sports device for traveling on water
US2488963A (en) * 1947-05-19 1949-11-22 Julia D Clark Heel socket
US2544794A (en) * 1950-03-14 1951-03-13 Bell Aircraft Corp Helicopter amphibious landing gear
US2577917A (en) * 1948-08-13 1951-12-11 Homer L Root Aquatic device

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US227340A (en) * 1880-05-04 Carriage
US635085A (en) * 1899-07-21 1899-10-17 James A Varnum Hawser-indicator.
US1559390A (en) * 1925-08-22 1925-10-27 Waller Fred Aquaplane
US1830015A (en) * 1931-02-09 1931-11-03 Norman F Carmichael Surfboard pontoon structure
US1918508A (en) * 1932-01-21 1933-07-18 William L Wheeler Water sled or surf board
FR753711A (en) * 1933-03-28 1933-10-23 water sports equipment
US2286350A (en) * 1940-07-01 1942-06-16 Theodore R Drake Aquatic device
US2370318A (en) * 1943-10-28 1945-02-27 George B Cluett Displacement-hydroplane boat
US2412474A (en) * 1945-05-08 1946-12-10 Scott Paine Device facilitating walking on mud
FR929149A (en) * 1946-06-15 1947-12-17 sports device for traveling on water
US2488963A (en) * 1947-05-19 1949-11-22 Julia D Clark Heel socket
US2577917A (en) * 1948-08-13 1951-12-11 Homer L Root Aquatic device
US2544794A (en) * 1950-03-14 1951-03-13 Bell Aircraft Corp Helicopter amphibious landing gear

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2762063A (en) * 1953-04-02 1956-09-11 Quinn Jack Harvie Aqua disk
US2958875A (en) * 1957-09-06 1960-11-08 David H Mcclain Prow-shaped water sled with manually operated steering apparatus
US3064286A (en) * 1958-02-03 1962-11-20 Lauren E Hammond Water vehicle
US3031696A (en) * 1958-12-19 1962-05-01 William E Brabb Water ski
US3064838A (en) * 1959-04-30 1962-11-20 Carl F Doerfler Boat aligner
US3050751A (en) * 1959-07-20 1962-08-28 Robert R Moon Boat structure
US3082443A (en) * 1960-06-06 1963-03-26 Kimura Tak Aqua-sled
US3103019A (en) * 1961-07-06 1963-09-10 Freire Edward Method of fabricating a hull and the product hull
US3145400A (en) * 1963-04-08 1964-08-25 John D Yoakum Marine vehicle
US3665532A (en) * 1970-03-27 1972-05-30 Lawrence V Simpson Watercraft
US3777325A (en) * 1972-12-26 1973-12-11 W Bristol Water craft
US3950807A (en) * 1973-11-16 1976-04-20 Sharpe Roderick P Water ski
US4194458A (en) * 1976-11-16 1980-03-25 Lotte Kronwitter, nee Staiber Windsurfer with auxiliary propulsion equipment
FR2443377A1 (en) * 1978-12-07 1980-07-04 Meritor floating craft
US4302860A (en) * 1978-12-07 1981-12-01 Societe Meritor Floating device for swimming activities
US4361103A (en) * 1980-12-12 1982-11-30 Willat Bret G Water sled device
US5582529A (en) * 1994-03-03 1996-12-10 Montgomery; Robert E. High performance motorized water ski
US20130178122A1 (en) * 2009-10-30 2013-07-11 Lester LeBlanc Drop-knee board
US8876567B2 (en) * 2009-10-30 2014-11-04 Lester LeBlanc Drop-knee board

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