Patent ID: 7686050

Claim:
A device for detachably fitting to a vehicle wheel having a rim with an inner circumferential surface and a tire with a running surface, the device comprising: a traction aid having a first end and a second end; a tension element mounted on said first end of said traction aid; a fitting fitted to said first end of said traction aid; said tension element having a first pivot pin for fitting said tension element to said first end of said traction aid, said first pivot pin passing through said tension element and through said fitting fitted to said first end of said traction aid; at least two fixing devices fixed to the inner circumferential surface of the rim in each case in a region of rim edges, disposed opposite to each other and substantially perpendicular to a plane of the rim and aligned with each other to form a pair, said two fixing devices including: a first fixing device facing the inner circumferential surface of the rim and having a first fixing element and a second fixing element being complementary to said first fixing element, said first fixing element hooking and unhooking to said second fixing element, said first fixing device mounted on said second end of said traction aid; and a second fixing device facing a wheel outer side and having a coupling device for coupling and tensioning of said tension element, such that said traction aid may be tensioned transversely across the tire on the running surface between said first and second fixing devices; and at least one fixing bridge fixed on the inner circumferential surface of the rim transverse to the plane of the rim and extending substantially over a width of the rim, said fixing bridge having ends on which said first and second fixing devices are disposed, said fixing bridge being a double web with two part-webs disposed at a first distance from each other and parallel to each other.