Patent ID: RE39012

Claim:
A snowmobile steering ski assembly comprising: a frame for providing structural support to said ski and having attachment means for attachment of said frame to the steering mechanism of a snowmobile; and an elongated ski fixedly attached to said frame and having a curved bottom running surface having a first radius of curvature and structured for gliding over a surface of snow, an upturned front end having a relatively short radius of curvature, a rear end distal from said front end, and three curved protruding keels having a second effective radii of curvature smaller than said first radius of curvature of said bottom running surface, said protruding keels gradually emerging from said bottom running surface proximal said front end and extending along a portion of said length of said ski runner and gradually merging into said bottom running surface proximal said rear end and wherein said keels are molded as a part of said bottom running surface.