Lift truck reach mechanism

Claim 1

A REACH MECHANISM FOR USE ON A MATERIAL HANDLING DEVICE, SAID MECHANISM BEING CONNECTED BETWEEN A BASE MEMBER AND A RECIPROCATING LOAD-CARRYING DEVICE AND OPERATIVE TO RETRACT AND EXTEND SAID DEVICE TO AND FROM SAID FRAME, SAID MECHANISM COMPRISING, IN COMBINATION: AN INNER SCISSORS ARM ASSEMBLY, COMPRISING LEFT AND RIGHT SCISSORS ARMS, SAID ASSEMBLY HAVING UPPER, LOWER AND CENTRAL PIVOT AXES, ALL OF SAID PIVOT AXES BEING MUTUALLY PARALLEL AND EACH AXIS PASSING THROUGH BOTH OF SAID INNER SCISSORS ARMS; AN OUTER SCISSORS ARM ASSEMBLY COMPRISING LEFT AND RIGHT SCISSORS ARMS, SAID ASSEMBLY HAVING UPPER, LOWER AND CENTRAL PIVOT AXES, ALL OF SAID PIVOT AXES BEING MUTUALLY PARALLEL AND EACH AXIS PASSING THROUGH BOTH OF SAID OUTER SCISSORS ARMS; A LOAD CARRIAGE FRAME HAVING BEARING MEANS FOR FIXEDLY MOUNTING SAID UPPER PIVOT AXIS OF SAID INNER SCISSORS ARM ASSEMBLY AND HAVING A FIRST PAIR OF VERTICAL GUIDE MEANS; MEANS AFFIXED TO SAID LOADCARRYING DEVICE FOR PIVOTALLY MOUNTING SAID UPPER PIVOT AXES OF SAID OUTER SCISSORS ARM ASSEMBLY AND HAVING A SECOND PAIR OF VERTICAL GUIDE MEANS; BEARING MEANS AT SAID LOWER PIVOT AXIS OF SAID INNER SCISSORS ARMS MOUNTED TO RECIPROCATE IN SAID SECOND PAIR OF VERTICAL GUIDE MEANS; BEARING MEANS AT SAID LOWER PIVOT AXIS OF SAID OUTER SCISSORS ARMS MOUNTED TO RECIPROCATE IN SAID FIRST PAIR OF VERTICAL GUIDE MEANS; SCISSORS PIVOT MEANS PIVOTALLY CONNECTING TOGETHER THE LEFT ARMS OF SAID SCISSORS ASSEMBLIES AND CONNECTING TOGETHER THE RIGHT ARMS OF SAID SCISSORS ASSEMBLIES; AND DOUBLE-ACTING MOTIVE MEANS CONNECTED BETWEEN SAID LOAD CARRIAGE FRAME AND SAID INNER SCISSORS ASSEMBLY AND OPERATIVE TO EXTEND AND RETRACT SAID LOAD CARRYING DEVICE, SAID UPPER PIVOT AXIS OF SAID INNER SCISSORS ARM ASSEMBLY BEING JOURNALLED FORWARDLY OF SAID FIRST PAIR OF VERTICAL GUIDE MEANS AND THE ARMS OF SAID OUTER SCISSORS ARM ASSEMBLY BEING SPACED APART A DISTANCE GREATER THAN THE WIDTH OF SAID INNER SCISSORS ARM ASSEMBLY SO THAT SAID UPPER PIVOT AXIS OF SAID OUTER ASSEMBLY MAY PASS SAID UPPER PIVOT AXIS OF SAID INNER ASSEMBLY AS SAID MECHANISM IS EXTENDED AND RETRACTED.