Pipe handling device

Claim 1

A PIPE HANDLING DEVICE FOR USE IN COMBINATION WITH A DRILLING RIG, WHICH DRILLING RIG HAS AN UPRIGHT TOWER WITH A TRAVELING BLOCK, A SWIVEL, AND A PIPE ROTATING DEVICE DEPENDING THEREFROM, WHICH PIPE HANDLING DEVICE COMPRISES; (A) A BRACKET MOUNTED ON THE PIPE ROTATING DEVICE FOR MOVEMENT BY THE TRAVELING BLOCK, (B) AN ARM PIVOTALLY MOUNTED ON SAID BRACKET, (C) A SUPPORT FRAME MOUNTED ON SAID ARM, (D) A PAIR OF ARCUATE PIPE ENGAGING MEMBERS PIVOTALLY MOUNTED ON SAID SUPPORT FRAME, WITH THE AXIS OF THE PIVOT BEING SUBSTANTIALLY PARALLEL TO THE AXIS OF SAID ARCUATE PIPE ENGAGING MEMBERS, (1) AN ARM EXTENDING IN THE OPPOSITE DIRECTION FROM EACH ARCUATE PIPE ENGAGING MEMBER, (2) A ROLLER JOURNALED ON EACH SAID ARM NEAR THE END THEREOF OPPOSITE EACH ARCUATE PIPE ENGAGING MEMBER, (E) A CAM, A PORTION OF WHICH CAM HAS SPACED APART PARALLEL FACES AND A WEDGE-SHAPED PORTION ASSOCIATED WITH A SIDE THEREOF, WHICH CAM IS PIVOTALLY MOUNTED ON SAID SUPPORT FRAME TO ACTUATE SAID ARCUATE PIPE ENGAGING MEMBERS, (1) SAID CAM BEING ADAPTED TO MOVE BETWEEN SAID ROLLERS TO POSITIVELY CLOSE SAID PIPE ENGAGING MEMBERS, WHEN SAID CAM IS IN ONE POSITION, AND TO PERMIT SAID PIPE ENGAGING MEMBERS TO OPEN WHEN SAID CAM IS IN ANOTHER POSITION, AND (F) OPERATOR MEANS OPERATIVELY ASSOCIATED WITH SAID CAM TO PIVOTALLY MOVE SAID CAM BY REMOTE CONTROL.