Scissor-lift mechanism

Claim 1

IN EXTENSIBLE SCISSOR-LIFT MECHANISM INCLUDING A BASE FRAME AND WORK-SUPPORTING MEANS DISPOSED OVER SAID BASE FRAME, SCISSOR MEANS OPERATIVELY INTERPOSED BETWEEN SAID BASE FRAME AND SUPPORTING MEANS COMPRISING A PAIR OF RELATIVELY MOVABLE CROSSED SCISSOR ARMS, AND PIVOT MEANS INTERCONNECTING THE SCISSOR ARMS INTERMEDIATE THEIR ENDS, FOR RELATIVE MOVEMENT OF THE ARMS ABOUT A PIVOT AXIS FOR THE ARMS, A TORQUE ROD CONNECTED TO ONE OF SAID SCISSOR ARMS ADJACENT SAID PIVOT MEANS WITH THE AXIS THEREOF EXTENDING PARALLEL TO SAID PIVOT AXIS, SAID TORQUE ROD HAVING A CIRCUMFERENTIAL SURFACE EXTENDING ABOUT SAID PIVOT AXIS, A TORQUE ARM CONNECTED TO SAID TORQUE ROD EXTENDING LATERALLY OF THE ROD, AN ELONGATED EXTENSIBLE-CONTRACTABLE RAM, AND MEANS CONNECTING ONE END OF SAID RAM TO SAID TORQUE ARM, SAID RAM AND TORQUE ARM BEING POSITIONED RELATIVE TO SAID TORQUE ROD WHEREBY UPON ACTUATION OF THE RAM SAID ROD IS TWISTED IN A DIRECTION COINCIDING WITH THE DIRECTION SAID ONE ARM MOVES RELATIVE TO THE OTHER UPON EXTENSION OF THE SCISSOR-LIFT MECHANISM.