Road lane marker, has spiral joint spring whose diameter is equal to diameter of circle inscribed in triangular section of sleeve, which includes radial pin projecting towards exterior at sleeves anchoring end

摘要

The marker has a helicoidal spring (2) housed in a tubular sleeve (1) on a part of its height. External diameter (D) of the spiral joint spring is equal to the diameter of a circle inscribed in a triangular section of the sleeve. The sleeve has a radial pin (3) projecting towards exterior to form a triangle peak at its end, where it is anchored to the ground. A cap is connected at the sleeve end, opposite to the anchoring end.