Patent ID: 7163212
Filing Date: 2007-01-16
Classification: B62D

Abstract:
1. A portable transportation assembly comprising a generally rectangular frame including a pair of substantially identical and linearly coextensive side members, a front member which is orthogonally coupled to said pair of substantially identical side members, and a rear member, which is orthogonally coupled to said pair of substantially identical side members and which is parallel to said front member; a first axle having a first shape which is parallel to said front and rear members and which is orthogonally and fixedly coupled to a said pair of substantially similar side members; a second axle which is of a second shape and which is parallel to said front and rear members and which is orthogonally and movably coupled to said pair of substantially identical side members and which is disposed below said first axle; a first wheel; a third axle which is coupled to said first wheel; a second wheel; a fourth axle which is coupled to said second wheel; a first wing member which is coupled to a first end of said second axle and to said third axle; a second wing member which is coupled to said fourth axle and to a second end of said second axle; a shaft assembly which is disposed within said frame and which moves only in first and second directions which are each orthogonal to said first and second axles; and a “c” shaped motion conversion portion which is coupled to said second axle and to said shaft assembly and which rotates said second axle in a first rotational direction only upon movement of said shaft assembly in a first direction, effective to cause the first rotational motion to be concurrently communicated to each of said wheels, thereby concurrently raising each of said wheels and which rotates said second axle in a second rotational direction only upon movement of said shaft assembly in a second direction, effective to cause the second rotational motion to be concurrently communicated to each of said wheels, thereby concurrently lowering each of said wheels, when said raising and lowering of said wheels occurs without requiring said frame to be first tipped.