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Class 441/68 - Water ski


Subclass of Class 441 - Buoys, rafts, and aquatic devices
Definition: Device comprising an elongated boardlike member having a width
No. of patents: 95
Last issue date: 05/01/2012


    3  
NumberTitleIssue Date
4386982Method of making a water ski construction
A water ski formed of molded upper and lower shells made of sheet molding compound which have mating and overlapping flanges around the entire perimeter of the shells which are bonded together to form a buoyancy chamber. In one embodiment, the chamber is ...
06/07/1983
4386915Dry land trick ski trainer
A dry land trick ski trainer is disclosed comprising a circular platform disposed at 21/2 to 10 degrees attitude and rotatingly supported at its center on a base. The circular platform is provided with a ski boot and markings to show the proper placement ...
06/07/1983
4378750Water ski tow harness float
A tubular float for use in a water ski tow device. The float has a hollow shaft pulley in one end thereof and a slot in the other end thereof. A hitch rope is attached to the transom of the boat at locations displaced from the central axis of the boat. Th...
04/05/1983
4344641Snow ski having air cushion forming undersurface
A ski having lower frictional resistance created by introduction of an air cushion. At least one chamber is formed in the running surface of the ski to hold air which is introduced through an air entrance on the ski. The sides of the chamber are formed to...
08/17/1982
4314384Water ski constructed with interlocking flanged shells
A water ski formed of molded upper and lower shells made of sheet molding compound which have mating and overlapping flanges around the entire perimeter of the shells which are bonded together to form a buoyancy chamber. In one embodiment, the chamber is ...
02/09/1982
4296511Water ski with increased stability
An aquatic device having improved stability and maneuverability comprising a member to be moved through water and a curved plate attached to the member for forming a chamber having an inlet opening and a substantially unobstructed outlet opening and a cro...
10/27/1981
4293968Interconnected water skis
Application of at least one slot notch or groove to or near the rear of a single or pair of towed planing boards or surfaces. Such slots or the like induce a water geyser at speed that improves the appearance and/or directional control of such boards. Suc...
10/13/1981
4261778Method of producing skis
A method of producing skis of the type comprising a core of a lightweight material, e.g., lightweight wood, where layers of fiber-reinforced plastic, e.g., fiberglass-reinforced polyester, are provided on the top and bottom sides of the finished ski. A so...
04/14/1981
4241929Ski board with improved foot treads
An improved footrest on a surf-type single ski has a plurality of skid-resistant, generally L-shaped members, one positioned in front and the other behind the center line of the ski for receiving the feet of the skier in a readily removable relationship, ...
12/30/1980
4227274Piggy back ski
A piggy back ski (10) comprises a first ski section (12) secured to a second ski section (14) by a plurality of releasable fasteners (16). The first ski section (12) includes a foot binding (18) secured thereto. The second ski section (14) can be selectiv...
10/14/1980
4196878Aircraft landing-gear with skids
In rotary-wing aircraft, a landing gear having two main skids connected to the aircraft structure by two cantilevered arcuate supports. Each skid has at least one flexible element capable of flexing resiliently upon contacting the ground....
04/08/1980
4118050Ski having a three-dimensional running surface
A ski is described which has a running surface and a profiling transverse to the longitudinal axis of the ski in at least one region of the underside of the ski intermediate the tip and the rear end of the latter. The ski comprises a rifling of grooves ex...
10/03/1978
4101997Water ski for power driven water vehicle
A water ski particularly adapted to function as the front ski of a twin ski, jet-driven water vehicle which is steered by turning of the front ski. Sections of the water ski define a planing surface and a pair of inclined, laterally spaced side surfaces e...
07/25/1978
3950807Water ski
A one-piece molded plastic water ski having an elongated body of V-shaped transverse cross-section through the fore and mid sections of the ski, with the angle between the sidewalls increasing progressively toward the aft section to provide a substantiall...
04/20/1976
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