High security lock

Details High security lock High security lock

1993-06-01

1999-02-09

Barrett, Suzanne Dino

Locks

Portable

Padlocks

70417, 70 38C, E05B 6722

Patent

active

058680136

ABSTRACT:
A method high security locking includes inserting a shackle having two ends into a lock body having openings for receiving the ends of the shackle. A latch in the lock body has a catch that snaps into engagement with the shackle for securing at least one end of the shackle in the body. The latch may be released to allow the one end of the shackle to move clear of the body. to open the lock. The shackle is made of a shape memory effect alloy having a characteristic that its yield strength increases when work is impressed on it, so that cutting or breaking the shackle with common tools is more difficult and time consuming than with other shackle materials. The lock thus provides a level of security substantially superior to conventional locks.

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patent: 5181403 (1993-01-01), Lii
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