Patent ID: 8046939

Claim:
An apparatus for attaching an accessory to a vehicle, said accessory having a scraping edge and a heel, said apparatus comprising a linkage assembly attachable to said vehicle and having first and second pivot axes pivotally connecting with said accessory, said first pivot axis being beneath said second pivot axis, said linkage assembly having first and second configuration s including said second axis being located in first and second positions relative to said first axis, respectively, said second axis moving arcuately rearward in going from said first position to said second position; wherein when the scraping edge of the accessory strikes an immovable object, the linkage assembly moves from the first to the second configuration; wherein when said linkage assembly is in said first configuration, the scraping edge and the heel of the accessory are both resting on the ground; and, wherein when said linkage assembly is in said second configuration, the heel of the accessory is on the ground and the scraping edge is elevated to allow the scraping edge to ride over the immovable object.