FIELD: mechanical engineering; devices providing constant air pressure in pneumatic tyres. SUBSTANCE: device has housing with suction and discharge installed on wheel and working member installed stationary relative to rotating wheel. Housing is made in the form of tubular elastic material half-ring installed coaxially with wheel. Working member is made in the form of roller contacting with housing to compress it in place of contact for eliminating the clearance inside tube. EFFECT: simplified, design, easy and reliable functioning at any speed of vehicle. 2 cl, 1 dwg
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