Low Stiffness Spring

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The Low Stiffness Spring (Lost Spring) is an novel method to create a torsional spring damper system that is inherently stable while allowing low frequency vibration attenuation. This technology can be applied to almost all power transmission devices such as belt-drives, gear-drives, chain-drives, shaft-drives etc.

The Lost Spring uses an external spring damper arrangement in the form of O-rings, cables, metallic springs, or any combination thereof that pass through the hub and hook on to the loops in the ring to create a robust damped or isolated pulley, gear, sprocket, coupling, or any other device that helps reduce system vibrations or the transmission thereof to down-steam components.

- The elastomer is not mold-bonded  (cost effective).

- The volume of elastomer used is relatively smaller.

- The device has perfect modal decoupling.

- Viscous and coulomb damping are inherently present.

- The device does not disintegrate if the elastomer fails.

- The device is serviceable in the field without disassembly.