Darrel E Stiger
Architects at Ames, Denver, CO
License number
Colorado 300317
Issued Date
Mar 6, 1959
Renew Date
Jul 31, 2001
Expiration Date
Jul 31, 2001
Type
Architect
Address
Address
3831 S Ames St S AMES, Denver, CO 80235
Professional information
Drill Attachment
US Patent:
4082474, Apr 4, 1978
Filed:
Jan 7, 1977
Appl. No.:
5/757701
Inventors:
Darrel E. Stiger - Denver CO
International Classification:
B23B 3900
US Classification:
408110
Abstract:
An attachment for motor powered drills for accurately positioning drill bits when holes of regulable depth and angle are to be drilled in a work piece. An open-centered base for contact with the work piece provides journal supports for paired rotatable trunnions that may reciprocally receive guide rods disposed above the base and at right angles to said trunnions. Paired guide sleeves of a frame attached to the drill motor and disposed parallel to the axis of the drill reciprocally receive the guide rods, and the drill and its bit are, accordingly, movable along the guide rods to cut a desired hole in the work piece. Index means and detents facilitate varied angular positionings for said trunnions and guide rods whereby holes that are angularly disposed with respect to the work piece may be drilled. The guide rods may be extended through the base to provide accurate centering of drilled holes, and a separate jig or vise is provided that holds the drill attachment and drill, etc. in adjusted lateral positions.