Tumbler-type key verification system

Details Tumbler-type key verification system Tumbler-type key verification system

2008-10-02

2011-10-25

Gall, Lloyd (Department: 3673)

Locks

Operating mechanism

Key

C070S387000, C070S409000

Reexamination Certificate

active

08042367

ABSTRACT:
A tumbler-type key verification system including a tumbler-type key and a lock apparatus. The lock apparatus includes a support member, a movable member movable relative to the support member, tumblers which are biased by tumbler springs and are arranged to engage with the support member and the movable member, and a lock mechanism that reinforces the locking strength of the tumblers. The lock mechanism having a two-piece structure including a first piece movably accommodated in the movable member and a second piece movably accommodated in the support member. The lock mechanism reinforces the locking strength of the tumblers by having the first piece or the second piece engage both the movable member and the support member before the tumbler-type key is inserted into the lock apparatus or when the tumbler-type key is being inserted into the lock apparatus.

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