Adjustable wing plow

Abstract

A plow assembly includes a pair of plow wings which are pivotally mounted at opposite ends of a center plow. Each of the plow wings may pivot between a forwardly angled position and an aligned position. The plow assembly may pivot a trailing plow wing in response to the center plow being urged or angled toward that side of the vehicle. The plow wines may be oriented in their forwardly angled position until the center plow is at least substantially urged or pivoted toward its angled position or toward a position between the center position and the angled position. The trailing plow wing may be pivoted or urged to its aligned position in response to the center plow being substantially urged or pivoted toward its angled position or toward a position between its center position and its angled position.

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       28 . A plow assembly for a vehicle, said plow assembly comprising: 
 a center plow having first and second ends, said center plow being mountable to the vehicle and being pivotable relative to the vehicle between a first position, where said center plow is pivoted toward said first end, and a center position, where said center plow is positioned generally normal to the direction of travel of the vehicle;    a first plow wing pivotally mounted at said first end of said center plow, said first plow wing being pivotable between an angled position, where said first plow wing is angled forwardly with respect to said center plow, and an aligned position, where said first plow wing is generally aligned with said center plow; and    an actuating system operable to urge said first plow wing toward said angled position until said center plow is urged at least substantially toward one of said first position and a position between said first and center positions, said actuating system urging said first plow wing toward said aligned position in response to said center plow being urged at least substantially toward said one of said first position and a position between said first and center positions.    
   
   
       29 . The plow assembly of  claim 28 , wherein said actuating system is operable to urge said first plow wing toward said aligned position in response to said center plow being urged at least substantially toward said first position.  
   
   
       30 . The plow assembly of  claim 29 , wherein said actuating system is operable to urge said first plow wing toward said angled position in response to said center plow being at least partially urged toward a second position, where said center plow is pivoted toward said second end.  
   
   
       31 . The plow assembly of  claim 29 , wherein said first plow wing is biased toward said angled position such that said first plow wing is generally in said angled position when said center plow is positioned generally at said center position or generally between said first and center positions.  
   
   
       32 . The plow assembly of  claim 28 , wherein said actuating system includes a first wing actuator operable to urge said first plow wing toward said aligned position.  
   
   
       33 . The plow assembly of  claim 32 , wherein said actuating system includes at least one plow actuator operable to pivot said center plow between said first and center positions.  
   
   
       34 . The plow assembly of  claim 33 , wherein said actuators are responsive to pressurized fluid.  
   
   
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