Tool for holding and driving screws

Claim 1

A TOOL FOR HOLDING AND DRIVING SCREWS HAVING HEADS OF PREDETERMINED MAXIMUM DIAMETER AND WHEREIN THE OUTER FACE OF EACH HEAD HAS AT LEAST ONE DRIVING INDENTATION COMPRISING, AN ELONGATED BIT HAVING ONE END FORMED TO FIT THE SAID INDENTATION WHILE THE OTHER END PORTION THEREOF IS ADAPTED TO BE FITTED INTO A DRIVING MEANS, A TUBULAR BLOCK SLIDEABLY BUT NON-ROTATABLY FITTED ON SAID BIT ADJACENT SAID FORMED END AND SURROUNDING SAID FORMED END, SAID BLOCK HAVING AN ENLARGED BORE SECTION EXTENDING INWARDLY FROM ONE END THEREOF TO RECEIVE THE HEADS OF THE SCREWS, THE SIDE WALL OF SAID BORE SECTION HAVING CIRCUMFERENTIALLY SPACED APERTURES THEREIN ADJACENT THE SAID ONE END OF SAID BLOCK, GRIP BITS SLIDEABLE RADIALLY IN SAID APERTURES AND OPERATIVE WHEN IN RADIALLY INWARD POSITIONS TO ENGAGE THE PERIPHERAL PORTIONS OF THE INNER FACES OF THE HEADS OF THE SCREWS, MEANS CARRIED BY SAID BLOCK TO YIELDINGLY BIAS SAID GRIP BITS TO RADIALLY OUTWARD POSITIONS, A SLEEVE HAVING LIMITED LONGITUDINAL SLIDING FIT ON SAID BLOCK AND HAVING A TAPERED INTERNAL BORE SECTION WHICH FLARES OUTWARDLY TO THE END OF THE SLEEVE WHICH IS ADJACENT SAID GRIP BITS, AND SPRING MEANS HOUSED WITHIN SAID SLEEVE BIASING SAID ELONGATED BIT AND BLOCK IN OPPOSITE RELATIVE LONGITUDINAL DIRECTIONS.