Hydraulic vibratory compactor

Claim 1

A high force producing vibratory compaction device for mounting on a heavy-duty vehicle adapted to impart variable forces and movements to said device, comprising a structural support frame, means for rigidly coupling said support frame to the heavy-duty vehicle, a body having a generally horizontal compaction pan and means for generating vibratory motion in said body, and means for flexibly mounting said body on said support frame, said structural support frame being positioned above said body and having structural arms extending down the sides of said body, said flexible mounting means comprising at least four blocks of material having a low modulus of elasticity extending approximately horizontally in the unstressed condition between said body and the lower extremeties of said structural arms to flexibly couple said structural support frame to said body with a resultant low spring modulus for minimizing the vibrational forces transmitted to the vehicle, said structural arms being laterally positioned at substantially the extremities of said compaction pan and closely approaching said compaction pan upon the application of normal vertical loading forces on said frame by the vehicle, and said blocks being of a size and positioned to deform substantially under said downward vertical loading toward a downwardly stressed condition with the direction of the resilient force imposed on the body by each block being primarily downward and slightly outwardly to intersect the plane of the base surface of said compaction pan at a location close to the adjacent extremity of said pan for maximum stability under all directions of loading.