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1. A scraper blade device for cleaning a surface when moving in a forward travel direction relative to the surface, the scraper blade device having a front surface and a lowermost edge, the scraper blade device including:
an upper blade portion generally defining an upper area of the front surface of the scraper blade device; and a bottom blade portion generally defining a bottom area of the front surface of the scraper blade device, the bottom blade portion including a plurality of widthwise-disposed blade segments that are adjoined and juxtaposed to one another, each blade segment having an upper portion, a bottom portion, a front side face and a rear side face, the bottom portion of each blade segment including a bottom edge and the bottom edges of the blade segments forming together the lowermost edge of the scraper blade device, the bottom edge of each blade segment being independently slidingly movable in an up and down movement with reference to the bottom edges of other blade segments in the bottom blade portion, the bottom edges being biased towards a downward working position by a plurality of first bias mechanisms, the blade segments being also pivotally movable rearwards, with reference to the forward travel direction, around a pivot axis that is substantially parallel to the lowermost edge of the scraper blade device, each bottom edge having a forward working position and a rearward tripped position where each bottom edge in the rearward tripped position is backwards underneath the scraper blade device, with reference to the forward travel direction, compared to the forward working position of the bottom edge, the blade segments being biased forwards around the pivot axis, with reference to the forward travel direction, by at least one second bias mechanism to urge the bottom edges of the blade segments towards the forward working position. |
