Ground engaging support for ground traversing machines

Claim 1

A GROUND ENGAGING SUPPORT FOR GROUND TRAVERSING MACHINES COMPRISING, A FRAME ADAPTED TO BE CONNECTED TO SUCH A MACHINE IN SUPPORTING RELATION, A PAIR OF LATERALLY SPACED APART ELONGATE SHOES MOUNTED AT OPPOSITE SIDES OF THE FRAME TO ENGAGE THE GROUND AND AT LEAST PARTIALLY SUPPORT SAID FRAME THEREABOVE, MEANS PIVOTALLY CONNECTING THE INTERMEDIATE PORTIONS OF EACH SHOE TO ITS ASSOCIATED SIDE OF THE FRAME FOR PERMITTING PIVOTAL MOVEMENT OF THE SHOES ABOUT AN AXIS EXTENDING TRANSVERSELY OF THE MACHINE AND ORIENTING SAID SHOES TO EXTEND LONGITUDINALLY IN THE DIRECTION OF MOVEMENT OF THE MACHINE, A GROUND ENGAGING ROLLER EXTENDINGBETWEEN SAID SHOES, MEANS INTERCONNECTING OPPOSITE ENDS OF THE ROLLER WITH THE REAR END PORTIONS OF SAID SHOES TO PERMIT REVOLVING MOVEMENT OF THE ROLLER ABOUT ITS LONGITUDINAL AXIS, SAID LAST-MENTIONED INTERCONNECTING MEANS ALSO DEFINING A PIVOTAL CONNECTION BETWEEN EACH SHOE AND ONE END OF SAID ROLLER TO PERMIT RELATIVE PIVOTAL MOVEMENT OF THE ROLLER WITH RESPECT TO EACH SHOE ABOUT A HORIZONTAL AXIS EXTENDING SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF THE SHOE, AND RESILIENT MEANS INTERCONNECTING SAID FRAME AND SAID ROLLER AND URGING SAID ROLLER DOWNWARDLY TO THEREBY CAUSE THE MAJOR PORTION OF THE WEIGHT OF SAID FRAME AND MACHINE TO BE BORNE BY THE ROLLER.