E - Fixed Constructions – 05 – B
Patent
E - Fixed Constructions
05
B
70/55
E05B 27/04 (2006.01) E05B 27/00 (2006.01)
Patent
CA 1106200
CAM LOCK ABSTRACT OF THE DISCLOSURE A key operated cam lock including a shell and a rotary key plug and having axially elongated pin tumbler assemblies each comprising a plurality of tumbler elements including a pin tumbler carried by the key plug and a driver carried by the shell. A projection on an end of one of the tumbler elements of each tumbler assembly is received in a slot in the end of another associated element and serves to couple a driver to an associated pin tumbler when the key plug is in locked position. V-shaped bits on the key engagable with complemen- tary V-shaped chisel tips on the pin tumblers axially and an- gularly position the pin tumbler assemblies in unlocked posi- tion wherein slots in various tumbler elements are aligned with annular grooves in the key plug eccentric to the axis of plug rotation. The projections escape from the slots and enter the grooves when the key plug is rotated from locked position toward an unlocked position. The tumbler elements having projections thereon may be axially symmetrical.
314391
Emhart Industries Inc.
Ridout & Maybee Llp
LandOfFree
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