Lifting arm in loading apparatus

Claim 1

A FOLDING BOOM ARRANGEMENT FOR TRUCKS AND THE LIKE COMPRISING, A FOLDING BOOM HAVING A PIVOTALLY MOUNTED FIRST ARM UPON AN UPRIGHT SUPPORT AND HVING A FREE END, A HYDRAULICALLY OPERATED RAM CONNECTED TO SAID ARM TO OPERATE IT TO SUBSTANTIALLY HORIZONTAL POSITION AND TO AN ELEVATED POSITION, A SECOND ARM HAVING AN END PIVOTALLY CONNECTED TO SAID FREE END OF SAID FIRST ARM, A TWO-ARM LEVER PIVOTALLY MOUNTED FOR MOVEMENT RELATIVE TO SAID FIRST AND SECOND ARMS, MEANS MOUNTING SAID SECOND ARM AND SAID LEVER FOR PIVOTAL ROTATION ABOUT A COMMON AXIS, A PAIR OF HYDRAULICALLY OPERATED RAMS CONNECTED TO SAID FIRST AND SECOND ARMS RESPECTIVELY AND TO SAID LEVER AT SPACED POINTS FOR OPERATING SAID FIRST AND SECOND ARMS TO A FIRST POSITION IN WHICH SAID SECOND ARM IS DISPOSED AS A LONGITUDINAL EXTENSION OF SAID FIRST ARM AND FOR OPERATING SAID SECOND ARM TO A SECOND POSITION IN WHICH SAID ARMS ARE BOTH DISPOSED EXTENDING IN A COMMON DIRECTION AWAY FROM SAID COMMON AXIS AND SAID SECOND ARM ASSUMES A POSITION BELOW SAID FIRST ARM FOLDED BACK ALONG SAID FIRST ARM.