Patent ID: 8596878

Claim:
A rolling bearing comprising: a lower annular cup, an upper annular cup, a lower ring mounted inside a the lower annular cup, an upper ring mounted inside an the upper annular cup, at least one row of rolling elements positioned between raceways defined by the lower and upper rings, wherein the upper cup and the lower cup define an internal space and a sinuous chamber, the upper ring and the lower ring being located within the internal space, and a lubricating grease material positioned only within the internal space; wherein one of the lower and upper annular cups has at least one annular skirt and the other one of the lower and upper annular cups has at least one annular groove, the annular skirt being partly inserted within the at least one annular groove so as to form the sinuous chamber, the sinuous chamber being outside of and extending radially outwardly from the internal space; a waterproof grease material having a different composition from and a greater viscosity than the lubricating grease material, the waterproof grease material being positioned solely within the sinuous chamber.