| 摘要 |
A tightening system of straps for use in anti-skid and traction enhancement devices is disclosed. The tightening system comprises surface contact members, which provides anti-skid protection if mounted in tire treads; a central node, located on the principle axis of the axle of a wheel; a plurality of extending straps and a plurality of extensions adapted to fasten the straps around its periphery. A plurality of radially extending flexible straps, attached to the surface contact member at their first ends and to the central node at their second ends, are used to tighten the anti-skid device. The flexible straps are passed through a buckle for tightening the surface contact members in the radial direction. Each flexible strap has ratchet teeth and each buckle has a driving thumb which allows the user to adjust the tightness of the strap as much as needed while the ratcheted strap is prevented from reverse movement by teeth and pawl of said buckle. |
