Patent ID: 7434644

Claim:
An apparatus for propelling a passenger across a ground surface, comprising: a board including a top surface, a bottom surface, a front end and a back end, said top surface being adapted to receive the passenger thereon, and said bottom surface being adapted for sliding engagement on a ground surface; a frame attached to said board proximate said back end, wherein said frame further includes a first side member, a second side member, an axel frame, and a spring means for biasing said axel frame in a specific direction, said first side member including a first channel therein, said second side member including a second channel therein, said axel frame including a first leg member with a first opening and a second leg member with a second opening, said first leg member being received within said first channel, said second leg member being received within said second channel such that said axel frame moves vertically within said first and second side members, said axel frame being forced in a generally downward direction by said spring means, and said first axel extending through said first and second openings of said first and second leg members of said axel frame; and a drive assembly mounted to said frame, said drive assembly including a first wheel, a second wheel, a motor and a track, said first wheel being spaced apart from said second wheel such that said track is supported by said first wheel and said second wheel, and said drive assembly further includes at least one arm member, a first axel, and a second axel, said at least one arm member including a first end with a first aperture, and a second end with a second aperture, said first axel extending through said first aperture, said first wheel being received on said first axel, said second axel extending through said second aperture, said second wheel being received on said second axel, wherein said at least one arm member is connected to said frame by a biasing means for forcing said at least one arm member in a generally downward direction such that said track engages the ground surface, said motor being operatively engaged with said track such that, in operation, said track drives said board across the ground surface.