Rail lifting device

Claim 1

A WORK HANDLING DEVICE COMPRISING CARRIER MEANS FOR TRANSMITTING A DISPLACING FORCE IN ONE DIRECTION TO A LOADED WORKPIECE, AN ELONGATED SUPPORT MEMBER PROJECTING OUTWARDLY FROM AND MOUNTED ON SAID CARRIER MEANS FOR OSCILLATION ABOUT AN AXIS RELATIVE TO SAID CARRIER EXTENDING LONGITUDINALLY OF SAID SUPPORT MEMBER BETWEEN EXTENDED AND RETRACTED POSITIONS, AND RECIPROCATION ALONG SAID AXIS, AND INCLUDING WORKPIECE ENGAGING MEANS ON ITS FREE END ADAPTED TO ENGAGE WORKPIECE WHEN SAID SUPPORT MEMBER IS IN THE EXTENDED POSITION FOR TRANSMITTING SAID DISPLACING FORCE TO SAID WORKPIECE, COACTING MEANS CARRIED BY SAID CARRIER MEANS AND SUPPORT MEANS FOR OSCILLATING SAID SUPPORT MEMBER IN DIRECT RESPONSE TO RECIPROCATION OF SAID SUPPORT MEMBER RELATIVE TO SAID CARRIER MEANS, MEANS CONNECTED TO SAID CARRIER MEANS AND OPERABLE TO RELEASABLY RETAIN SAID SUPPORT MEMBER IN SAID RETRACTED POSITION, SAID WORKPIECE ENGAGING MEANS COMPRISING AN ELONGATED TRANSVERSE MEMBER EXTENDING TRANSVERSELY OF AND PROJECTING OUTWARDLY FROM OPPOSITE SIDES OF SAID FREE END, THE OPPOSITE ENDS OF SAID ELONGATED TRANSVERSE MEMBER INCLUDING OPPOSITELY OPENING GENERALLY C-SHAPED LOADENGAGING PORTIONS WHOSE PLANES GENERALLY PARALLEL SAID AXIS AND WHICH OPEN IN THE DIRECTION OF ROTATION OF SAID SUPPORT MEMBER EFFECTED BY MOVEMENT OF THE LATTER TO THE EXTENDED POSITION.