Two-wheeled steerable vehicle

In a ground vehicle having a fore-and-aft body including transversely spaced apart, right and left, fore-and-aft supports, steerable wheel structure, comprising:

• right and left transversely spaced apart carriers disposed closely adjacent the right and left supports, respectively;
• right and left means mounting the right and left carriers respectively on the supports for selective fore-and-aft movement of the carriers relative to the supports and relative to each other;
• right and left transversely coaxial shafts extending respectively from outer ends adjacent to the respective carriers toward each other to respective inner ends proximate to each other;
• right and left means respectively connecting the shaft outer ends to the carriers for fore-and-aft movement with the respective carriers and including articulate connections of the outer ends to the respective carriers for enabling fore-and-aft swinging of the shafts relative to the respective carriers;
• a sleeve coaxially received by the shafts and spanning the shaft inner ends;
• means interconnecting the sleeve and shafts for rotation of said sleeve and said shafts in unison while enabling relative axial movement of the shafts with respect to the sleeve as the shaft inner ends move axially toward and away from each other in response to fore-and-aft movement of either or both the carriers;
• a wheel coaxially journaled on the sleeve;
• means operative between the wheel and sleeve to hold the wheel against axial shifting relative to the sleeve;
• and link means articulately interconnecting one of said left and right carriers to the proximate portion of the sleeve for controlling the axial position of the sleeve and wheel means as either or both of the carriers move fore and aft.