Patent ID: 6322287
Filing Date: 2001-11-27
Classification: E01C

Abstract:
A machine for grading aggregate along a course on a ground surface, said machine comprising,a prime mover,a frame carried by the prime mover and projecting forwardly therefrom in the direction of travel,blade assembly means on said frame for dispersing aggregate across the course providing an aggregate layer of selected depth,a shoe yieldably mounted on the frame for travel along the surface of the dispersed aggregate layer,actuator means coupling said shoe to the frame,control means activated by an operator of the prime mover to simultaneously vary the vertical distance between said shoe and the frame and the vertical distance between the frame carried blade assembly means and the ground surface to vary the depth of the aggregate layer, andindicator means on the frame for travel along the course in proximity to a fixed height reference with the vertical relationship of the indicator means to the fixed height reference being indicative of the depth of the aggregate layer relative the desired depth of aggregate.