Patent ID: 7654347

Claim:
Crawler moving system with variable configuration comprising a front axle ( 6 ), a rear axle ( 2 ) and at least one central axle ( 4 ) where each axle has a wheel and said wheel is connected to at least one other wheel with a crawler, said crawler being adapted for transmitting movement to the wheels and having at least one crawler per side, wherein said crawler moving system comprises between the front axle and the central axle and between the rear axle and the central axle respective intermediate axles ( 3 , 5 ) that act as a pivot about which said front and rear axles are able to rotate, front and rear bumper axles, each having a wheel ( 81 , 82 , 91 , 92 ) which is positioned in contact with the crawlers that connect wheels of the intermediate axles, so as to keep the crawlers in contact with said intermediate wheels when the front and rear axle wheels are rotated and having a first pair of crawlers ( 71 , 71 ′) associated with central ( 4 ), front ( 6 ) and front intermediate ( 5 ) axles, and having a second pair of crawlers ( 72 , 72 ′) is associated with the rear ( 2 ), intermediate rear axle ( 3 ) and central ( 4 ) axles whereby motion is transmitted from such a central axle through a pair of coaxial wheels ( 41 , 41 ′, 42 , 42 ′) suitable for transmitting the movement to both of the crawlers.