Pin-tumbler lock

Details Pin-tumbler lock Pin-tumbler lock

E - Fixed Constructions

05

B

70/55

E05B 27/04 (2006.01) E05B 27/00 (2006.01)

Patent

CA 1318145

A B S T R A C T A pin tumbler lock comprising a shell with cylindrical hole, a cylindrical plug fitting within said hole of said shell, said plug rotatable by key means, said plug having first bore means for receiving first pin tumblers, said first bore means being substantially normal to the axis of the plug, said shell having second bore means for receiving second pin tumblers therein, said second bore means being aligned with said first bore means, first pin tumblers in said first bore means, second pin tumblers in said second bore means, and means in said shell for forcing said second pin tumblers into said aligned first bores to thereby prevent rotation of said plug, first and second pin tumblers having substantially mating surfaces at their points of contact, chacterized that said plug comprises two grooves normal to the axis of said plug, one groove on each side adjacent said first bore means, and said first and second tumbler pins mate at least partially within said grooves in the plug, thereby providing a non-linear shear line between said plug and said shell.

570880

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