Triple lift truck with connected lift chains

Claim 1

A LIFT TRUCK COMPRISING FIXED VERTICAL PRIMARY UPRIGHTS, VERTICALLY MOVABLE SECONDARY AND TERTIARY TELESCOPING UPRIGHTS MOUNTED ON SAID PRIMARY UPRIGHTS, A LOAD CARRIAGE MOUNTED FOR VERTICAL MOVEMENT ON SAID TERTIARY UPRIGHTS, A STOP MEMBER FOR SAID LOAD CARRIAGE ON THE TERTIARY UPRIGHTS, SAID LOAD CARRIAGE DIRECTLY ENGAGING SAID STOP MEMBER WHEN SAID CARRIAGE REACHES AN UPWARD LIMIT OF MOVEMENT RELATIVE TO THE TERTIARY UPRIGHTS, A HYDRAULIC LIFT RAM HAVING RELATIVELY MOVABLE PARTS EXTENDIBLE RELATIVELY TO ONE ANOTHER UPON APPLICATION OF FLUID PRESSURE TO SAID RAM, MEANS MOUNTING ONE OF SAID PARTS OF SAID RAM ON SAID SECONDARY UPRIGHTS IN A VERTICAL POSITION FOR EXTENSION OF SAID RAM UPWARDLY VERTICALLY RELATIVELY TO SAID SECONDARY UPRIGHTS WHEN SAID RAM IS ACTUATED, A SHEAVE MOUNTED ADJACENT THE UPPER END OF THE UPPERMOST EXTENDIBLE PART OF SAID RAM, SAID RAM BEING OF SUCH OVERALL LENGTH WHEN COLLAPSED THAT WHEN MOUNTED ON SAID SECONDARY UPRIGHTS THE UPPER END OF SAID RAM AND SAID SHEAVE ARE BELOW THE UPPER ENDS OF SAID UPRIGHTS, AND SAID UPPERMOST PART OF THE RAM BEING UNSECURED TO SAID UPRIGHTS FOR FREE EXTENSION OF SAID RAM RELATIVELY TO SAID UPRIGHTS SO THAT FREE LIFT EXTENSION OF SAID RAM IS POSSIBLE WITHOUT MOVEMENT OF ANY OF SAID UPRIGHTS, A FIRST FLEXIBLE LIFT ELEMENT SECURED AT ONE END TO SAID LOAD CARRIAGE, EXTENDING OVER SAID RAM SHEAVE AND SECURED AT ITS OTHER END TO SAID TERTIARY UPRIGHTS, A SECOND LIFT SHEAVE SECURED RELATIVELY TO SAID SECONDARY UPRIGHTS ADJACENT THE LOWER END THEREOF, AND A SECOND FLEXIBLE LIFT ELEMENT SECURED AT ONE END TO SAID TERTIARY UPRIGHTS, EXTENDING AROUND SAID SECOND LIFT SHEAVE AND ATTACHED AT ITS OTHER END TO SAID PRIMARY UPRIGHTS.