Lock having a helical keyway and accompanying key and...

Details Lock having a helical keyway and accompanying key and... Lock having a helical keyway and accompanying key and...

2005-08-09

2005-08-09

Barrett, Suzanne Dino (Department: 3676)

Locks

Operating mechanism

Key

C070S358000, C070S395000, C070S407000, C070S409000, C070S403000

Reexamination Certificate

active

06925844

ABSTRACT:
The present application advantageously provides at least one keyway in a lock core that poses tremendous difficulty for a lock breaker by not allowing the lock breaker to see all of the pin tumblers in the keyway. The keyway according to a preferred embodiment of the present application comprises two helical keyways oppositely extending along a longitudinal axis of the lock core and formed of rectangular cross section. The present application further comprises an accompanying helical key having at least one helical key blade for fitting into the keyway having a corresponding helical shape to turn the core and open the lock.

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