Rotary cutter for facilitating opening of cylindrical locks...

Details Rotary cutter for facilitating opening of cylindrical locks... Rotary cutter for facilitating opening of cylindrical locks...

B - Operations, Transporting

23

Q

29/43, 70/61

B23Q 3/00 (2006.01)

Patent

CA 1177235

ABSTRACT A rotary tool, adapted to be chucked in a rotary power tool, is provided with cutting blades for cutting away the annulus that surrounds the core portion of a lock of the type referred to above. When the annulus is cut away, the tumbler mechanism is exposed axially outwardly so that the tumblers may be actuated by a de- pressor tool for opening the lock in the event the key has been lost. The cutter has an axial tubular front end portion that pilots on the lock core and fits the annular gap between the core and surrounding portion of the lock. The front end of the cutter has a stop portion protecting axially ahead of the front cutting edges to limit the depth of the cut and to prevent damage to the projecting ends of the tumbler pins.

420666

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