Patent ID: 6871425

Claim:
A wing plow apparatus for attachment to a vehicle for carrying out a benching operation, the apparatus comprising: a moldboard having an inboard and an outboard end and a top edge and a cutting edge; a wing post for supporting and guiding the moldboard between a lower disposition of the moldboard and a benching disposition of the moldboard, the benching disposition being higher than the lower disposition; the wing post including: a cylinder; a piston slidably disposed within the cylinder; a connecting rod having a first and a second end, the first end being secured to the piston, the second end being rigidly connected to the vehicle; a further cylinder; a further piston slidably disposed within the further cylinder; a further connecting rod having a first and a second termination, the first termination being secured to the further piston, the second termination being connected to the inboard end of the moldboard; and the cylinder and the further cylinder being rigidly secured to each other, the arrangement being 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.