Patent ID: 6640941
Filing Date: 2003-11-04
Classification: F16F

Abstract:
In a shock-isolation structure wherein a load is supported on a supporting surface with a plurality of spring units operable in both tension and compression therebetween and wherein said spring units are oriented in a truss configuration with first ends of said spring units connected to said supporting surface for universal movement and with second ends of said spring units connected to said load for universal movement, the improvement wherein said plurality of said spring units each includes a sleeve, a coil spring in said sleeve, an end cap on said sleeve, a rod which extends outwardly through said end cap with a clearance fit in a nonextended position, a body on the end of said rod, and a depression and protrusion relationship between said end cap and said body for mating engagement therebetween when said rod is in said nonextended position to thereby center said rod in said end cap with said clearance therebetween, said protrusion being a ridge, and said depression being a groove which mates with said protrusion.