Oscillating blade assembly for earth working machines

Claim 1

In an earth working machine the combination comprising, a bucket member having a pair of spaced sidewalls, a blade and deck assembly including an upper deck member having a downwardly bent front end portion, a blade member secured to said downwardly bent front end portion, a parallel spaced lower base member secured to said upper deck member downwardly bent front end portion, a pair of spaced transverse members secured to said upper deck member and said lower base member and forming a transverse passageway therebetween, a transverse beam member extending through said passageway in said blade and deck assembly, said transverse beam member secured to said bucket member sidewalls thereby connecting said blade and deck assembly to said bucket member, said transverse beam member and said pair of spaced transverse members in said blade and deck assembly arranged to slidably support a said blade and deck assembly on said bucket member for limited longitudinal movement of said blade and deck assembly relative to said bucket member, a plurality of oscillators constructed and arranged to develop a linearly directed thrust alternately in opposite directions, said oscillators connected to said blade and deck assembly and operable to impart a linear thrust thereto in opposite directions, drive means connected to said plurality of oscillators for simultaneous actuation of each of said oscillators, and resilient means mounted between said oscillators and said transverse beam, said resilient means operable to supplement the percussive force exerted by said oscillators in one direction.