Material handling machine

Claim 1

A MATERIAL HANDLING MACHINE COMPRISING A TWOWHEELED TRACTOR PORTION AND A TWO-WHEELED TRAILER PORTION, A COMBINED DRAFT AND STEERING COUPLING CONNECTING THE SAID TRACTOR AND TRAILER PORTIONS, SAID DRAFT AND STEERING COUPLING INCLUDING MEANS WHEREBY THE SAID TRAILER PORTION PIVOTS WITH RESPECT TO THE TRACTOR PORTION ABOUT A VERTICALLY DISPOSED AXIS AND ABOUT A HORIZONTALLY DISPOSED AXIS, THE SAID TRAILER PORTION INCLUDING A HORIZONTALLY DISPOSED FRAME PORTION, AN UPWARDLY DISPOSED ARTICULATED BOOM PORTION PIVOTALLY MOUNTED ON THE SAID FRAME PORTION ADJACENT THE SAID REAR EXTREMITY, THE SAID BOOM PORTION COMPRISING A FIRST UPWARDLY DISPOSED ELONGATED BOOM MEMBER HAVING ITS LOWER END PIVOTED TO THE SAID FRAME AND A SECOND ELONGATED BOOM MEMBER HAVING ONE END THEREOF CONNECTED TO THE OTHER END OF THE SAID FIRST BOOM MEMBER AND EXTENDING REARWARDLY THEREFROM, THE SAID FIRST BOOM MEMBER BEING CONSTRUCTED AND ARRANGED FOR SELECTIVE MOVEMENT FORWARDLY AND REARWARDLY OF A VERTICALLY DISPOSED POSITION, FIRST FLUID OPERATED EXPANSIBLE CHAMBER POWER MEANS CONNECTED BETWEEN THE SAID FRAME AND THE SAID FIRST BOOM MEMBVER FOR PIVOTING THE SAID BOOM PORTION SELECTIVELY BETWEEN A REARWARDLY EXTENDING AND A FORWARDLY EXTENDING POSITION AND INTERMEDIATE POSITIONS, SECOND FLUID OPERATED EXPANSIBLE CHAMBER POWER MEANS CONNECTED BETWEEN THE SAID FIRST AND SECOND BOOM MEMBERS FOR SELECTIVELY PIVOTING THE LATTER UPWARDLY AND DOWNWARDLY WITH RESPECT TO THE FORMER, DOWNWARDLY EXTENDING GRAPPLE LOAD ENGAGING MEANS CONNECTED TO THE REARWARD END OF THE SAID SECOND BOOM MEMBER, MEANS FOR OPERATING THE SAID LOAD ENGAGING MEANS TO PICK UP A LOAD, AND AT LEAST ONE OF THE SAID TWO BOOM MEMBERS HAVING AN OUTWARDLY CURVED PORTION CONFRONTING THE OTHER WHEN THE SAID FIRST BOOM MEMBER IS IN A FORWARDLY EXTENDING POSITION WHEREBY THE LOAD HELD BY THE SAID LOAD ENGAGING MEANS MAY BE SUPPORTED DIRECTLY OVER THE TRAILER WHEELS FOR TRANSPORT.