Quick-change adjustable clocking nosepiece

Claim 1

A quick change nosepiece for a power drill having a drill motor, a drill spindle and a drill bit attached to the drill spindle, comprising: (a) a first housing having a proximate end and a distal end for enclosing the drill bit and the drill spindle; (b) a second housing having a distal end for attachment to said proximate end of said first housing, and a proximate end; (c) attachment means for attaching said proximate end of said second housing to the drill motor; (d) clocking means for varying both the linear and the rotational relationships between said second housing and the drill bit; (e) bushing means having a proximate end for attachment to said distal end of said first housing and a distal end for attachment to a drill jig such that the drill bit passes through said bushing means to contact a workpiece; (f) engagement means for attaching said proximate end of said first housing and said distal end of said second housing, said engagement means including: (i) an alignment means for aligning said first housing and said second housing in a predetermined locking position; said alignment means having: (a) at least one alignment pin disposed on one of said housings: (b) at least one corresponding alignment slot disposed on the other of said housings, said at least one alignment slot having an open end and a closed end and being adapted to receive at least one alignment pin and to guide said housings into said predetermined locking position; and (ii) a locking means for releasably locking said first and second housings together in said pedetermined locking position, said locking means having: (a) at least one locking pin disposed on one of said housings; and (b) at least one corresponding cavity disposed on the other of said housings being adapted to receive said at least one locking pin when said housings are in said predetermined locking position.