Removable, non-skid tire fitting
OwnerAlain J. M. Bourcier de Caron de Previnquieresinventor
Life of this patent
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Abstract
A removable, non-skid tire fitting for use in snow and ice which includes a number of shoes on chains which are to be attached to the tire. Each shoe is of plastic material and is formed with a plurality of bosses in which flanged studs are located, the flange aiding to retain a stud in a boss. Selected studs of a shoe, preferably those to be located closer to the center of the tire tread, can be provided with tungsten carbide tips. A preferred range of dimensions for the shoes, studs and bosses is given.
Claims13
A removable, non-skid fitting for a tire comprising:
- a shoe of flexible plastic material, said shoe formed with a sole portion having a lower surface which is to be placed adjacent the tire and having an upper surface, the distance between said upper and lower surfaces being in the range of from about 5 mm to about 6 mm,
- a plurality of bosses on said shoe extending from said upper surface of said sole,
- a stud for a said boss, each of said studs having a substantially circular base flange with a diameter in the range of from about 12 mm to about 14 mm with rounded edges and a generally cylindrical extending shaft with a length of from about 4 mm to about 6 mm, said base flange and a part of the extending shaft of a stud being held within a corresponding boss with a part of the shaft extending above the top surface of its boss, the thickness of the sole between the lower face of a stud base flange lower face and the lower surface of the sole being at least about 3.5 mm and the diameter of a boss at its base on the upper surface of the sole being greater than the diameter of the base flange of a stud.
A fitting according to claim 15 wherein the bosses have a greater height above the top surface of the sole in the region of the middle of the sole than on the edges thereof.
A fitting according to claim 12 wherein the tungsten carbide tips project beyond the face of the studs by about 1 mm.
Dependencies are inferred from the claim text.