Snowmobile ski
DCFirst Claim
1. A snowmobile ski comprising a top surface and a bottom running surface, at least one topside, substantially upright fin integral with the top surface of the ski at an outer lateral edge of the ski, the at least one fin comprising a substantial sail area sufficient to minimize lateral slip of the ski during turns in deep snow and a length extending over a significant length of the top surface of the ski, wherein the at least one fin has a lip running along its upper edge for a significant length, the lip projecting outwardly a sufficient distance to provide a barrier to the upward flow of snow relative to the at least one fin when the ski is tilted in a turn.
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Abstract
This invention relates to an improved snowmobile ski having a vertical fin on the topside of the ski with a surface area large enough to minimize or prevent sideways slippage of the ski during a turn. The fin, if a single fin is used, is located adjacent the outboard edge of the ski. A snowmobile ski with dual topside fins having outwardly projecting lips along the upper edges of said fins has improved performance in deep snow.
45 Citations
26 Claims
- 1. A snowmobile ski comprising a top surface and a bottom running surface, at least one topside, substantially upright fin integral with the top surface of the ski at an outer lateral edge of the ski, the at least one fin comprising a substantial sail area sufficient to minimize lateral slip of the ski during turns in deep snow and a length extending over a significant length of the top surface of the ski, wherein the at least one fin has a lip running along its upper edge for a significant length, the lip projecting outwardly a sufficient distance to provide a barrier to the upward flow of snow relative to the at least one fin when the ski is tilted in a turn.
- 21. A rocker-shaped snowmobile ski with a pair of outboard rocker-shaped keels comprising a pair of topside fins projecting upwardly from the upper surface of the ski at each outer lateral edge of the ski, wherein the fins have substantially planar outer surfaces with a surface area of at least about 20 square inches with the fore and aft ends of the fins substantially merged into the upper surface of the ski, wherein the fins have outwardly projecting lips along a substantial portion of their upper edges.
Specification