Patent ID: 6499570
Filing Date: 2002-12-31
Classification: F16F

Abstract:
A shock-absorbing device comprising:a cylindrical casing defining an airtight space; at least a pair of compressible springy balls arranged in said cylindrical casing; a main piston mounted in said cylindrical casing above said at least a pair of compressible springy balls and dividing the airtight space of said cylindrical casing into an upper chamber and a lower chamber, said main piston being reciprocated to compress said at least a pair of compressible springy balls within said lower chamber, said main piston having a piston rod extending out of said cylindrical casing; a damping substance flowing in said cylindrical casing; a plurality of main piston valves respectively installed in said main piston for enabling said damping substance to flow between said upper chamber above said main piston and said lower chamber below said main piston; at lest one auxiliary piston position between said at least a pair of compressible springy balls; and, at least one auxiliary piston valve disposed in said at least one auxiliary piston for flow of said damping substance therethrough.