Patent ID: 7942209

Claim:
A blade unit comprising: a. a hitch member, wherein said hitch member is configured to be attachable to a prime mover; b. an extending arm, wherein a first end of said extending arm is operably engaged with said hitch member; c. a first blade, wherein said first blade is operably engaged with a second end of said extending arm; d. a second blade, wherein said second blade is substantially parallel to said first blade, wherein said second blade is pivotally affixed to said first blade such that the vertical position of said second blade with respect to said first blade may be adjusted, and wherein the horizontal position of said second blade with respect to said first blade is fixed; and, e. a translator, wherein said-translator is positioned between said first blade and said second blade, wherein a first side of said translator is pivotally affixed to said first blade, and wherein a second side of said translator is pivotally affixed to said second blade.