"Skat"
The hinge-frame scheme provides high reliability of a knife due to its constructive simplicity. This scheme has a certain advantages and provides high reliability of knife under constructive simplicity. The handle of a knife consists of two frames, fixed by a hinge on "the heel" of blade. Knife can be opened by double turning the frames around the hinge axis.
In the spread out condition the handle fixes blade due to elasticity of walls of frames and by a ledge which enters into a special hollow made on one of the frames. Furthermore, high reliability of knife is guaranteed when handle is grasped by the hand. To fasten knife on a belt there is a spring clip on a handle. Tetrahedral thorn at the heel of blade serves as the self-defense weapon and a tool for breaking of automobile glasses in emergencies. One-and-a-half edged blade has a serrated part. Anti-glare, black or camouflage covering are used.
Characteristics of a knife:
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Total length, mm - 201
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Length of blade, mm - 87
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The greatest width of blade, mm - 15
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Thickness of a butt, mm - 5-3
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Width of handle, mm - 15
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Thickness of handle, mm - 15
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Hardness of blade, HRC - 52-56
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Material of blade, steel: 50Cr14MoVa, 70Cr16MoVaSi (patent RU236957C1).