| 摘要 |
A wing plow apparatus is disclosed for attachment to a vehicle for carrying out a benching operation. The apparatus includes a moldboard having an inboard and an outboard end and a top edge and a cutting edge. A wing post supports and guides the moldboard between a lower and a benching disposition of the moldboard, the benching disposition being higher than the lower disposition. The wing post includes a cylinder and a piston slidably disposed within the cylinder. A connecting rod has a first and a second end, with the first end being secured to the piston. The second end of the connecting rod is rigidly connected to the vehicle. The wing post also includes a further cylinder and a further piston slidably disposed within the further cylinder. A further connecting rod has a first and a second termination. The first termination is secured to the further piston and the second termination is connected to the inboard end of the moldboard. The cylinder and the further cylinder are rigidly secured to each other. The arrangement is such that in operation of the apparatus, when the cylinders are connected to a source of pressurized hydraulic fluid, selective movement of the further connecting rod in a first direction away from the connecting rod and in a second direction towards the connecting rod is permitted.
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