Patent ID: 8893855
Filing Date: 2014-11-25
Classification: B60B,F16C

Abstract:
1. A bearing-protection device for protecting and lubricating wheel bearings installed in hubs of towable vehicles while positively indicating lubrication levels provided to the wheel bearings, the bearing-protection device comprising: a bearing protector housing defining a lubrication chamber and including an outer wall, a proximal end and a distal end, a viewing window defined in the outer wall of the bearing protector housing, the viewing window having a proximal side and a distal side; a lubricant-level indicia on the outer wall of the bearing protector housing intersecting the viewing window intermediate the proximal side and the distal side; and a piston assembly movable within the lubrication chamber, the piston assembly biased in a direction generally toward the proximal end of the bearing protector housing, wherein at least a portion of the piston assembly is viewable through the viewing window to determine the position of the piston assembly relative to the lubricant-level indicia, thereby providing an indication of a lubrication level in the lubrication chamber.