DEVICE FOR PREVENTING UNAUTHORIZED USAGE Russian patent published in 2002 - IPC

FIELD: fastening systems preventing unauthorized usage. SUBSTANCE: device includes threaded member with head, nut, cap preventing possibility of end-side access to fastening assembly. Cap is mounted on head of threaded member and it is fixed in axial direction. Similar cap is mounted at side of nut. Casing in the form of high-strength bracket with openings is mounted on both caps for preventing lateral access. On inner surface of casing there are annular turnings formed by above mentioned openings. Caps have outer slit annular protrusions engaging with turnings of casing. Individual number is applied onto bottom portion of one cap at its outer side. Additional protection of threaded member with nut is provided by means of casing in the form of high-strength bracket. EFFECT: improved degree of protection against unauthorized usage. 3 cl, 1 dwg