Patent ID: 7743534
Filing Date: 2010-06-29
Classification: E01H

Abstract:
1. A plow blade comprising: a first longitudinal piece having a top edge, a bottom edge, side edges, a front surface and a rear surface; and a second longitudinal piece having a top, a bottom, side edges, a front surface and a rear surface; wherein the first and second longitudinal pieces are made of extruded aluminum and are attached to each other at their respective bottom and top edges; wherein each of the first and second pieces has a hollow core extending from the first end to the second end; wherein the bottom edge of the first longitudinal piece and the top edge of the second longitudinal piece are configured and arranged to engage each other in an interlocking relation; wherein the bottom edge of the first longitudinal piece includes a slot and a lip and the top edge of the second longitudinal piece includes a lip and a slot, with the lip of the first longitudinal piece configured to be received by the slot in the in the second longitudinal piece, and with the slot of the first longitudinal piece configured to receive the lip of the second longitudinal piece, whereby the longitudinal pieces are joined to each other; wherein the lips and slots of the first and second longitudinal pieces are configured so that as the first and second longitudinal pieces are attached to each other, the bottom edge of the first longitudinal piece and the top edge of the second longitudinal piece are drawn towards each other.