Method and apparatus for re-keying a lock
OwnerWilliam A. Staigerinventor
Life of this patent
Estimating the term…
Abstract
A re-keying process includes inserting a peg (65) into a plug (10) of a cylinder lock to be re-keyed. The peg (65) partially blocks a key slot (18) in the plug (10), thereby preventing the original key (30) to be inserted into the plug (10). A longitudinal groove (75) is then formed on the blade (74) of a key (70), thereby allowing the key (70) to be inserted into the partially blocked key slot (18). To insert the peg (65) into the plug (10), the plug (10) is placed in a bore (45) of a drill block (40). An alignment bolt (61) is used to positioning the plug (10) in the bore (45). A drill bit (62) is inserted into a drill guide hole (52) in the drill block (40) to drill a hole (63) in the plug (10). The peg (65) is then screwed into the hole (63).
Claims7
A re-keying apparatus, comprising:
- a drill block having first end, a second end, a plurality of sidewalls coupled between the first end and the second end, said drill block having a bore extending from the first end and adapted for receiving a lock plug, said drill block also having an alignment hole and a drill guide hole in a first sidewall and a second sidewall, respectively, of the plurality of sidewalls and communicating with the bore;
- and
- an alignment bolt removably inserted in the alignment hole, said alignment bolt aligning one of a plurality of pin holes in the lock plug with the alignment hole.
Dependencies are inferred from the claim text.