Scraper blade mountings for trucks

Claim 1

A SCRAPER BLADE MOUNTING ON A TRUCK HAVING FRAME MEMBERS COMPRISING A PIVOTAL SUPPORT ARRANGED AT AN ANGLE TO SAID FRAME MEMBERS AND SUPPORTED THEREBELOW, A SCRAPER BLADE PIVOTALLY MOUNTED ON SAID PIVOTAL SUPPORT, AN OPERATING CYLINDER SUPPORT BRACKET FIXEDLY SUPPORTED FROM THE FRAME OF SAID TRUCK BY ENGAGEMENT WITH SAID PIVOTAL SUPPORT AND PROJECTING ABOVE THE REAR OF SAID BLADE, SPACED TRUNNION BEARINGS CARRIED BY SAID SUPPORT BRACKET ABOVE AND TO THE REAR OF SAID BLADE, A CYLINDRICAL SPRING HOUSING HAVING TRUNNION BEARINGS TRANSVERSE TO ITS AXIS PIVOTALLY SUPPORTED BY THE TRUNNION BEARINGS ON SAID BRACKET AND HAVING AN ANNULAR ABUTMENT AT ITS UPPER END, AN INNER CYLINDER POSITIONED IN SPACED RELATION WITHIN SAID HOUSING AND HAVING AN ANNULAR ABUTMENT AROUND ITS LOWER END AXIALLY SLIDABLY AND NON-ROTATIVELY ENGAGED WITH SAID SPRING HOUSING, A CUSHION SPRING BEARING BETWEEN SAID ABUTMENT ON SAID HOUSING AND SAID ABUTMENT ON SAID INNER CYLINDER, A HYDRAULIC CYLINDER POSITIONED WITHIN SAID INNER CYLINDER AND BEARING AGAINST THE UPPER END THEREOF, AND A PISTON ROD RECIPROCABLE IN SAID HYDRAULIC CYLINDER AND PIVOTALLY CONNECTED AT ITS LOWER END TO SAID BLADE BELOW SAID SUPPORT BRACKET, SAID HYDRAULIC CYLINDER HAVING A FLUID CONNECTION AT ITS LOWER END POSITIONED BELOW SAID INNER CYLINDER AND A FLUID CONNECTION AT IS UPPER END PROJECTING THROUGH THE UPPER END OF SAID HOUSING.