Landing gear for trailers

Claim 1

A LANDING GEAR FOR TRAILERS COMPRISING: (A) A SUPPORTING LEG INCLUDING A FIRST LEG SECTION AND AN ADJUSTABLE SECOND LEG SECTION TELESCOPICALLY INTERFITTED WITH THE FIRST LEG SECTION, (B) MEANS PIVOTALLY MOUNTING THE FIRST LEG SECTION TO THE TRAILER ON A TRANSVERSE AXIS SO THAT THE LEG SWINGS TO A DOWNWARDLY EXTENDED POSITION OR TO A FOLDED POSITION, (C) A DRIVE SHAFT ROTATIVELY MOUNTED COAXIALLY WITH THE AXIS OF THE PIVOTAL MOUNTINGS MEANS (D) A FIRST GEAR MOUNTED ON THE DRIVE SHAFT, (E) MEANS INCLUDING A SECOND GEAR MESHING WITH THE FIRST GEAR AND MOUNTED TO THE LEG FOR ROTATION ON AN AXIS TRANSVERSE TO THE DRIVE SHAFT AXIS, THE LAST SAID MEANS EXTENDING OR RETRACTING THE LEG SECTIONS, (F) MEANS RESTRAINING RELATIVE ROTATION OF THE GEARS IN THE RETRACTED POSITION OF THE LEG SECTIONS UPON TURNING OF THE FIRST GEAR IN ONE DIRECTION SO THAT UPON CONTINUED TURNING IN THE SAME DIRECTION THE SECOND GEAR IS SWUNG ABOUT THE DRIVE SHAFT AXIS AND HENCE THE LEG IS SWUNG TO A FOLDED POSITION, (G) A GEAR BOX ATTACHED TO THE TRAILER INWARDLY OF THE LEG, THE GEAR BOX INCLUDING A HOUSING, A CRANKSHAFT ROTATIVELY MOUNTED IN THE HOUSING, THE CRANKSHAFT EXTENDING THROUGH THE HOUSING AND ACROSS THE LEG AND FORWARDLY OF THE LEG IN ITS DOWNWARDLY EXTENDED POSITION TO ONE SIDE OF THE TRAILER, THE AXIS OF THE CRANKSHAFT BEING LOCATED OUT OF THE PATH OF THE LEG DURING THE SWINGING MOVEMENT, AND (I) GEARING OPERATIVELY INTERCONNECTING THE CRANKSHAFT AND THE DRIVE SHAFT.