POWER DRIVEN SNOW CYCLE WITH SELF ADJUSTING FRAME

摘要

A POWER DRIVEN SKI-BOB WITH SELF ENERGIZING FRAME A power driven ski-bob with an elongated propulsion unit having preferably an anterior sliding portion, a posterior endless tread portion and an upwardly extending post means; the propulsion unit is connected to the rest of the-ski-bob's structure through a pivoting connection which is substantially higher than the sliding and tread portions so that these portions become de-energized and energized against snow, respectively, in response to said tread generating thrust against the snow to secure the engagement between the tread and snow.