Patent ID: RE39889

Claim:
Implement for working soil comprising a main frame, a hitch mounted on said main frame for attaching the main frame to a vehicle for towing the main frame along a path, said main frame extending substantially transverse to said path, scarifying teeth extending from said main frame for engaging the scarifying said soil, multiple tines extending from the main frame, said tines being spaced from one another along said main frame, said main frame being adjustable relative to the vehicle to move the scarifying teeth and tines into engagement with soil and an angle to work and grade soil, said main frame also being adjustable relative to the vehicle to move the scarifying teeth and tines out of engagement with said soil, a subframe mounted on said main frame by a pivot connection for pivoting along a substantially horizontal axis, a blade mounted on said subframe secured against movement relative to the subframe, said scarifying teeth located between said blade and said tines, said blade extending substantially parallel to said main frame whereby said blade is permitted to move relative to said tines, said subframe being movable about said axis from an upper position to a lowered position, and a manually releasable latching means for releasably latching said subframe in said upper position.