Patent ID: 7555853

Claim:
A snow plow assembly having a longitudinally extending plow body with a receiver extending from a back side of the plow body for coupling the snow plow assembly to a vehicle, a blade mounting structure mounted to the plow body which supports a longitudinally extending snow plow blade at a bottom edge of the plow body, the blade mounting structure having: a first series of longitudinally spaced hinge portions coupled to the plow body, said hinge portions each having respective rod apertures; a second series of longitudinally spaced hinge portions coupled to a mounting bracket for the snow plow blade, said hinge portions each having respective rod apertures; at least one longitudinally extending pivot rod received through said rod apertures of said first and second series of longitudinally spaced hinge portions thereby coupling the plow body to the mounting bracket; coil spring biasing means disposed between said first series of longitudinally spaced hinge portions and said second series of longitudinally spaced hinge portions on said at least one longitudinally extending pivot rod, to urge said snow plow blade in a forward operative position and to resiliently restore the snow plow blade to an operative position after encountering an obstacle; the first series of longitudinally spaced hinge portions each having a receiving slot to slidingly receive a respective hinge key; a series of hinge keys co-operating with said first series of longitudinally spaced hinge portions to be received in said receiving slots, said hinge keys defining a bearing surface for abutting one end of said coil spring biasing means, each said hinge key further having a locating notch to limit relative movement between the hinge key and the hinge portion, and; a series of hinge locks, each hinge lock having a receiving slot to capture a pivot rod and defining a bearing surface for abutting the plow body.