ELEMENT OF LOCK WITH KEYHOLE WITH PROTECTION AGAINST TURNING BY STANDARD TOOL AND RING FOR KEYHOLE Russian patent published in 2003 - IPC

Abstract RU 2200811 C2

FIELD: ironmongery. SUBSTANCE: invention is related to element of lock with keyhole with protection against turning by standard tool which cross-section has shape of triangle. Triangle is equilateral triangle with arc sides and is described around circle into which hexahedron of key of selected standard size is inscribed. There is proposed ring for this keyhole. EFFECT: enhanced resistance to unauthorized opening. 4 cl, 5 dwg

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RU 2 200 811 C2

Authors

Andreev-Andrievskij A.E.

Dates

2003-03-20—Published

2000-12-28—Filed