Patent attributes
An improved snow plow blade is disclosed which has a fixed upper plow blade and a pivoting lower trip blade mounted on the swing frame of the snow plow with the axis of rotation of the trip blade being directly in line with the swing frame and the support frame of the snow plow. Since the axis of rotation of the trip edge blade is located at the height of the vertical center of the swing frame (and is thereby in the same horizontal plane), the forces imparted to the swing frame will be essentially compressive in nature rather than including a torsional element as well. The trip edge blade and the trip edge springs used to bias the trip edge blade into an untripped position are substantially supported by the swing frame of the snow plow rather than being supported from the upper plow blade. The trip edge blade is also sufficiently high to prevent damage to the upper snow plow blade due to impacts with curbs or other high obstacles.
