Patent ID: 8028819

Claim:
A scraper blade for a conveyor belt cleaner, the scraper blade being adapted, when appropriately tensioned against a conveyor belt, to achieve a plurality of predetermined cleaning angles, relative to the conveyor belt, as the scraper blade is progressively worn down through contact with the conveyor belt, the scraper blade comprising: a first wear section proximate a distal end of the scraper blade, the first wear section being configured to maintain a first predetermined cleaning angle relative to the conveyor belt; and a second substantially adjacent the first wear section, the second wear section being configured to maintain a second predetermined cleaning angle, relative to the conveyor belt, after the first wear section is worn away through contact with the conveyor belt; wherein the second predetermined cleaning angle is different than the first predetermined cleaning angle; and wherein the scraper blade further comprises a third wear section substantially adjacent the second wear section, the third wear section being configured to maintain a third predetermined cleaning angle, relative to the conveyor belt, after the first and second wear section have both been worn away through contact with the conveyor belt, wherein the third predetermined cleaning angle is different than at least one of the first and second cleaning angles.