Anchor set tool

Claim 1

An improved tool adapted for use with a hand drill for installing screw anchors in concrete or masonry walls or the like . comprising: (a) a sleeve type body having: (1) an axial bore with a closed rear end and an open front end; (2) a longitudinally aligned open slot in said body; (3) at least one depth notch associated with the front portion of said slot. (b) a handle extending outwardly from the rear end of said body and receivable in the chuck of said drill; (c) a bit holder slidably located in said bore and having an axial cavity and a bit retention means that extends from one side of said holder through the slot in said body and secures said bit in said cavity such that the sidewalls of said bit holder cavity closely encircle said bit handle; (d) a drill bit with a handle secured in said bit holder cavity; (e) a coil spring through which said bit extends and having a rear end that abuts against said bit holder, said spring serving as a bias means to urge said bit in a rearward direction; (f) a driver means located at the front end of said body and having: (1) a head portion with a stair stepped socket; and (2) a neck portion positioned in the bore of said body and having a passageway that extends from the bottom of said head socket through said neck portion and opens to said body bore for closely encircling said bit to serve as a bit guide means; and (g) means for securing said driver means to said body.