Plow Blade Wing

Abstract

A wing extension for a plow blade is disclosed which comprises an extension plow blade having a plow surface for plowing a desired material; and mounting means for pivotally mounting the extension plow blade to an existing plow blade. The extension plow blade is pivotable from a first use position in alignment with the existing plow blade to a second rearwardly deflected position on contact with an immovable object. A biasing member, such as a torsion spring, is provided for biasing the extension plow blade in the first use position.

1 . A wing extension for a plow blade, comprising:
 an extension plow blade having a plow surface for plowing a desired material;   mounting means for pivotally mounting the extension plow blade to an existing plow blade, said extension plow blade pivotable from a first use position in alignment with the existing plow blade to a second rearwardly deflected position; and   biasing means for biasing the extension plow blade in the first use position.   
     
     
         2 . The wing extension according to  claim 1 , wherein the biasing means is at least one torsion spring. 
     
     
         3 . The wing extension according to  claim 1 , wherein the biasing means is in the form of at least two torsion springs. 
     
     
         4 . The wing extension according to  claim 1 , wherein said mounting means comprises:
 a frame member having a first edge for fixedly mounting said mounting means to the existing plow blade and a second edge including hinge means for pivotally mounting said wing extension.   
     
     
         5 . The wing extension according to  claim 2 , further comprising adjustment means for adjusting a load on the torsion springs. 
     
     
         6 . The wing extension according to  claim 4 , wherein the wing extension includes further hinge means, the further hinge means being complementary to the hinge means of the mounting means, said hinge means and further hinge means being barrel hinges forming a hollow passage therethrough when aligned. 
     
     
         7 . The wing extension according to  claim 5 , wherein the adjustment means comprises a rod extending through the hollow passage of the hinge means, said spring mounted on said rod between hinge means. 
     
     
         8 . The wing extension according to  claim 1 , wherein said wing member is movable to a third position, said third position being a storage position where the wing extension member is rotated rearward to a position parallel to a rear surface of the existing plow blade. 
     
     
         9 . The wing extension according to  claim 8 , wherein the wing member is movable to said third position through hydraulic means or mechanical means actuated by an operator. 
     
     
         10 . The wing extension according to  claim 8 , further comprising locking means for locking the wing extension in said third position. 
     
     
         11 . A wing extension for use with a plow blade, said wing extension comprising:
 a frame member;   a plow surface for contact with a substance to be plowed, said plow surface fixedly mounted to said frame member;   a mounting member for pivotably mounting said frame member to the plow blade, such that said frame member is pivotable from a first use position in alignment with the plow blade, and a second deflected position at a rearward angle with respect to the plow blade;   biasing means for biasing said frame member in a first use position.   
     
     
         12 . The wing extension according to  claim 11  wherein the frame member is also pivotable to a third position, wherein the third position is a non-use storage position, parallel to a back surface of the plow blade. 
     
     
         13 . The wing extension according to  claim 12 , further including releasable lock means for locking the frame member in the third position. 
     
     
         14 . The wing extension according to  claim 11 , wherein said biasing means is in the form of at least one torsion spring. 
     
     
         15 . The wing extension member according to  claim 14 , further including torque adjustment means for adjusting the torque on said at least one torsion spring. 
     
     
         16 . The wing extension according to  claim 1 , wherein the plow blade is a snow plow blade. 
     
     
         17 . A snow plow blade comprising:
 a main snow plow blade having a pair of ends;   at least one wing extension pivotably mounted with respect to at least one of the ends and pivotable from a first use position to a second rearwardly deflected position;   biasing means for biasing the at least one wing extension in the first use position;   wherein when in said first use position, the wing extension is in alignment with the main snow plow blade.   
     
     
         18 . The snow plow blade according to  claim 17 , further comprising a mounting frame having first and second mounting surfaces, said first mounting surface adapted to secure the mounting frame to the main snow plow blade and the second mounting surface adapted for pivotal mounting of said at least one wing extension. 
     
     
         19 . The snow plow blade according to  claim 17 , wherein said biasing means is in the form of at least one torsion spring. 
     
     
         20 . The snow plow blade according to  claim 19 , further comprising adjusting means for adjusting torque on the at least one torsion spring. 
     
     
         21 . The snow plow blade according to  claim 17 , wherein the wing extension is pivotable to a third position, said third position being a storage position where the wing extension is folded against a rear surface of the main snow plow blade. 
     
     
         22 . The snow plow blade according to  claim 21 , further comprising lock means to releasably lock the wing extension in said third position. 
     
     
         23 . The snow plow blade according to  claim 21 , further comprising actuating means for moving said wing extension from said first use position to said third storage position. 
     
     
         24 . The snow plow blade according to  claim 21 , wherein said actuating means is selected from the group consisting of mechanical, pneumatic and electric means.