Patent ID: 7886606

Claim:
In a vibration table having an upper surface on which test products are mounted by bolts that engage spaced internally threaded bolt openings in the upper surface, and wherein the upper surface is covered by an insulation layer comprising a sheet adhesively bonded to the upper surface, an improvement for mounting a test product or a mounting fixture for a test product to the upper surface so as to resist vibration damage to the insulation layer and restrict loss of vibration force due to the insulation layer, the improvement comprising an insert comprising an externally threaded shaft having an integral enlarged head at an upper end, the head being wider than the shaft at upper and lower ends of the head, the head having generally flat upper and lower surfaces on the upper and lower ends of the enlarged head, the insert having a threaded internal opening therein extending in an axial direction inwardly from an open end in the upper end of the head, the externally threaded shaft extending through an opening in the insulation layer and into engagement with an internally threaded insert opening in the upper surface of the table, the test product or mounting fixture for the test product being mounted to and tightened down against the upper surface of the enlarged head of the insert by a bolt that engages the threaded internal opening in the insert, the insert being threaded tightly into the table such that the lower surface of the head of the insert bears securely against the insulation layer, clamping the insulation layer in place and resisting separation of the insulation layer from the upper surface of the table and damage of the insulation layer during operation of the vibration table.