The shock isolator consists of lightweight cylinder containing compressed air and a piston, which is fully extended at steady state. In a shock isolator a piston is movably mounted within a compressible solid chamber formed within a housing. The compressible solid material to be extracted through said first passages during an extension of the piston, the compressible solid material to be extracted also through the second passages during retraction of the piston. A ring surrounding the piston, the ring to close off the second passages during extension of the piston, during retraction of the piston the ring to move to permit the compressible solid material to flow therethrough.
Shock tests are used to accurately measure the fragility of products and to evaluate protective packaging. Shock test data is key information necessary to ensure that any product is capable of with standing its 'real world' environment. Packages and products must be evaluated for their ability to withstand hazards of transportation. Shock occurs to a package or product when there is a change in velocity. When the package is dropped, the velocity immediately changes, therefore inducing shock. During shock testing, accelerometers are placed on the critical components of the package or product. The test specimen is then dropped from a pre-determined height according to the ASTM standard D3332. Drop shock testing assesses how well the package is protecting the product inside or the fragility and durability of the product.