| 摘要 |
A pin tumbler lock is key bump resistant by applying a top pin that has an at least partially walled tubular hollow structure. The hollow top pin is reduced in weight compared to a standard top pin. In one embodiment of the present invention the top pin is made longer than a top pin in a pin tumbler lock of standard construction. In a further embodiment of the present invention the pin tumbler lock has a compound spring in a common chamber of the pin tumbler lock. A top pin in one embodiment of the present invention is made of titanium. The top pin in a further embodiment of the present invention is part of a kit. The kit may have installation instructions. The kit may also have packaging. The pin tumbler lock in one embodiment of the present invention has a combination pin that is substantially heavier than a pin tumbler lock in a known embodiment. The pin tumbler lock may be a door lock, a container lock, a padlock or a car lock or any other lock that is subject to bumping.
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