Screw assembling and staking apparatus

Claim 1

A SCREW ASSEMBLING AND STAKING APPARATUS, WHICH COMPRISES: A CARRIER, A PAIR OF OPPOSED HOLDING FINGERS PIVOTALLY MOUNTED ON THE CARRIER FOR RECEIVING A SCREW THEREBETWEEN AND CARRYING THE SCREW TOWARD A WORKPIECE MOUNTED IN A WORKSTATION UPON MOVEMENT OF THE CARRIER TOWARDS THE WORKPIECE, SAID WORKPIECE HAVING A THREADED EYELET DISPOSED WITHIN A RECESS THEREOF FOR SUBSEQUENT INSERTION OF THE SCREW INTO THE EYELET, A SCREWDRIVER BIT ROTATABLY AND AXIALLY SLIDEABLE BETWEEN THE OPPOSED FINGERS FOR SUBSEQUENT ENGAGEMENT WITH THE SCREW TO DRIVE THE SCREW INTO THE THREADED EYELET, MEANS FOR SPREADING THE FINGERS AWAY FROM THE SCREW, MEANS FOR RETRACTING THE FINGERS UPWARDLY AWAY FROM THE WORKPIECE, MEANS RESPONSIVE TO A PREDETERMINED DOWNWARD MOVEMENT OF THE FINGERS FOR SIMULTANEOUSLY ACTUATING THE FINGER SPREADING AND RETRACTING MEANS SO THAT THE FINGERS ARE SPREAD TO AN OPEN POSITION AND RETRACTED AS THE SCREW IS INSERTED INTO THE THREADED EYELET, AND A SPIN-STAKING BIT ROTATABLY POSITIONED BENEATH THE WORKPIECE FOR SUBSEQUENT ENGAGEMENT WITH THE POSITIONED SCREW TO SPIN-STAKE THE THREADED END OF THE SCREW.