Patent ID: 7610839

Claim:
A portable guide mechanism for linearly guiding a hand held tool having a power driven cutter relative to a horizontally disposed work piece comprising: a linear guide rail having a flat bottom flange adapted to rest on and be releasably secured to said work piece and first and second parallel walls extending upwardly from laterally opposite sides of said flat bottom flange, said first and second walls being cylindrically shaped to present a pair of parallel guide tracks each having a 180° of upward facing surface and a chassis including a flat panel having a horizontal bottom surface adapted for sliding engagement with said work piece, a top surface adapted for securely mounting said hand held power driven cutting tool and an opening through which said cutter extends when cutting said work piece and a guide structure secured to one side of said chassis having a pair of horizontally spaced self lubricating plastic guide blocks spaced horizontally from one another in the linear direction of said guide rail, said blocks having a semi-circular surfaces complimentary to and slidingly engageable with said upward facing surfaces of said tracks to guide said chassis linearly during cutting of said work piece, said linear guide rail and said guide structure having a configuration permitting said chassis to be lowered onto said guide tracks and said work piece when initiating a cut in said workpiece other than at its periphery.