| 摘要 |
A plow assembly is disclosed for vehicles such as pickup trucks and tractors for moving snow or other materials. The plow assembly has at least one extendable, forwardly pivotable plow wing which is extendable on one end of a main plow by sliding movement along the front of the plow between a retracted and an extended position in which the plow wing is generally aligned with the plow front surface. The plow wing is also pivotally mounted on a hinge for movement between the extended position and a forwardly angled position in which the plow wing front surface extends at an angle to the plow front surface. A power source connected to the plow wing is operable to move the wing between the retracted, extended and forwardly angled positions. Preferably, a latch assembly prevents pivotal movement of the plow wing to the forwardly angled position until the plow wing is in the extended position. In the preferred embodiment, an extendable plow wing is included on each end of the main plow with a pair of independent fluid cylinders connected to the respective plow wings which are operable independently of one another to move the plow wings independently between their respective retracted, extended and forwardly angled positions. When both plow wings are pivoted to their forwardly angled positions, the plow assembly has a general U-shape which facilitates pushing snow or other material without the snow slipping off the plow blade ends. The plow assembly is also preferably pivotally mounted on a support frame for movement about a generally vertical pivot axis from a centered position to a series of angled positions in which the plow blade is angled to the left or right of the centered position. If desired, the plow blade may be pivotally connected to the support frame about a second, generally horizontal pivot axis to allow forward pivotal movement of the plow blade and plow wings in unison when the plow blade or either wing encounters an obstacle during plowing.
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