Patent ID: 6837286

Claim:
A removable traction device including a pair of chains being interconnected over the tread surface of a tire and attached to a pair of transversely extending structural bar members on each side of the tire, the lower end of each structural bar member is engaged and welded to a first plate member having a plurality of raised studs on a surface for firmly gripping the rubber wall of the tire; the opposite lower end of each structural bar member is connected to a structural part member, which includes holes for receiving therethrough a plurality of threaded rods formed on a surface of a second plate member having a plurality of raised studs on a surface opposite the threaded rods, with a plurality of nuts for adjusting and securing a bolt in the width direction of the tire, the bolt passing through a plurality of inverted U-shaped brackets formed on the structural part member and connected by washers and a nut at the opposite lower end of each structural bar member and to a moving part member, of which a curved metal bar is adapted to be inserted into an opening of the moving part member for tightening and firmly gripping the rubber walls of the tire with the plurality of raised studs on each of the first and second plate members.