Snow plow assembly

A snow plow assembly comprising:

• an angle frame adapted to be operably mounted to a vehicle,
• a quadrant frame,
• a plow blade mounted to said quadrant frame,
• a first link pivotally connected to said angle frame and said quadrant frame at first and second pivot points, respectively,
• a second link pivotally connected to said angle frame and said quadrant frame at third and fourth pivot points, respectively,
• said angle frame, quadrant frame, first link, and second link, and said first, second, third, and fourth pivot points defining a four-bar linkage,
• said first link being pivotably fixable relative to said angle frame at a first position, a second position, and a third position,
• wherein when said first link pivots from the first position to the second position relative to said angle frame said quadrant frame and hence said plow blade rotate in a first direction from a neutral position generally perpendicular to a longitudinal axis of the vehicle, and when said first link pivots from the first position to the third position said quadrant frame and hence said plow blade rotate in a second opposite direction from the neutral position,
• wherein said angle frame, quadrant frame, first link, and second link, and said first, second, third, and fourth pivot points define a trapezoid when said quadrant frame and hence said plow blade are in the neutral position,
• wherein said first link is pivotably fixable relative to said angle frame at a location outside a perimeter of the trapezoid.

A snow plow assembly comprising:

• an angle frame adapted to be operably mounted to a vehicle,
• a quadrant frame,
• a plow blade mounted to said quadrant frame,
• a first link pivotally connected to said angle frame and said quadrant frame at first and second pivot points, respectively,
• a second link pivotally connected to said angle frame and said quadrant frame at third and fourth pivot points, respectively,
• said angle frame, quadrant frame, first link, and second link, and said first, second, third, and fourth pivot points defining a four-bar linkage,
• said first link being pivotably fixable relative to said angle frame at a first position, a second position, and a third position,
• first means for pivoting said plow blade, quadrant frame, first link, and second link relative to said angle frame,
• wherein when said first link pivots from the first position to the second position relative to said angle frame said quadrant frame and hence said plow blade rotate in a first direction from a neutral position generally perpendicular to a longitudinal axis of the vehicle, and when said first link pivots from the first position to the third position said quadrant frame and hence said plow blade rotate in a second opposite direction from the neutral position,
• wherein when said first link pivots from the first position to the second position said quadrant frame and hence said plow blade translate in a first direction generally transverse to the longitudinal axis of the vehicle, and when said first link pivots from the first position to the third position said quadrant frame and hence said plow blade translate in a second opposite direction generally transverse to the longitudinal axis of the vehicle,
• a head gear adapted to be removably connected to the vehicle,
• said angle frame pivotally connected to said head gear for pivoting movement about a generally horizontal axis generally perpendicular to the longitudinal axis of the vehicle, and
• second means operably connected to said head gear and said angle frame for raising and lowering said plow blade,
• wherein said angle frame, quadrant frame, first link, and second link, and said first, second, third, and fourth pivot points define a trapezoid when said quadrant frame and hence said plow blade are in the neutral position,
• wherein said first link is pivotably fixable relative to said angle frame at a location outside a perimeter of the trapezoid.

A snow plow assembly comprising:

• an angle frame adapted to be operably mounted to a vehicle,
• a quadrant frame,
• a plow blade mounted to said quadrant frame,
• a drive link pivotally connected to said angle frame and said quadrant frame at first and second pivot points, respectively,
• a swing link pivotally connected to said angle frame and said quadrant frame at third and fourth pivot points, respectively,
• said angle frame, quadrant frame, drive link, and swing link, and said first, second, third, and fourth pivot points defining a four-bar linkage, and
• a first actuator pivotally connected on one end to said angle frame at a fifth pivot point and pivotally connected on the other end to said drive link at a sixth pivot point,
• wherein extending said first actuator causes said quadrant frame and hence said plow blade to rotate in a first direction from a neutral position generally perpendicular to a longitudinal axis of the vehicle, and retracting said first actuator causes said quadrant frame and hence said plow blade to rotate in a second opposite direction from the neutral position,
• wherein said angle frame, quadrant frame, drive link, and swing link, and said first, second, third, and fourth pivot points define a trapezoid when said quadrant frame and hence said plow blade are in the neutral position,
• wherein both of said fifth and sixth pivot points are located outside a perimeter of the trapezoid.