E - Fixed Constructions – 05 – B
Patent
E - Fixed Constructions
05
B
E05B 19/06 (2006.01) E05B 27/02 (2006.01)
Patent
CA 2618178
A key blank for a cylinder lock comprising a bow, a blade longitudinally extending from the bow to a tip, and having a longitudinally extending upper edge to be cut with coded bitting for mating with a tumbler stack of a cylinder lock. A projection extends outwardly on the upper edge adjacent the bow, rising from longitudinally extending surfaces at elevation e0 below the elevation e1 of the upper edge, and having a length parallel to the upper edge that is greater than a width transverse to the edge. The projection is interposed between a front edge portion to be cut with the coded bitting and a back edge portion extending to the bow at elevation e4 above elevation e1. The projection has cam surfaces converging longitudinally and transversely toward a nose at elevation e3 above elevation e1. The back edge has a notch forming an arcuate shoulder spaced from the upper projection at an elevation e2 above elevation e1, to support the rim of an auxiliary pin while the projection is within a recess on the underside of the pin.
Kaba Ilco Corp.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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