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Claim 1

A CLAMPING DEVICE OF THE CLASS DESCRIBED COMPRISING, A BASE, A HANDLE HAVING A BIFURCATED PORTION STRADDLING SAID BASE AND PIVOTALLY CONNECTED THERETO, A CLAMPING ARM, A FIRST CONNECTING LINK, AND A SECOND CONNECTING LINK, MEANS PIVOTALLY CONNECTING CORRESPONDING ENDS OF SAID LINKS TO SAID BASE, MEANS PIVOTALLY CONNECTING THE OTHER END OF SAID FIRST LINK TO SAID CLAMPING ARM INTERMEDIATE ITS ENDS, MEANS PIVOTALLY CONNECTING THE OTHER END OF SAID SECOND LINK TO THE END OF SAID CLAMPING ARM, WHEREBY SAID LINKS, DURING THE UNCLAMPING OPERATION, ACT TO FIRST RAISE SAID CLAMPING ARM AND THEN LONGITUDINALLY RETRACT SAID CLAMPING ARM WHILE IMPARTING AN ARCUATE MOVEMENT THERETO, AN ACTUATING LINK PIVOTALLY CONNECTED TO SAID HANDLE AND TO SAID CLAMPING ARM FOR MOVING THE SAME TO CLAMPED AND UNCLAMPED POSITIONS, AND A SEAT ON SAID BASE ADAPTED TO BE ENGAGED BY THE PIVOTAL CONNECTION BETWEEN SAID SECOND LINK AND CLAMPING ARM PRIOR TO THE FINAL MOVEMENT OF SAID CLAMPING ARM INTO CLAMPING POSITION.