Shock absorbers transmit some of the shock directly to the isolated part. Engineers can mitigate the problem by adding dampers or with complex control systems, but the self-damped air spring offers a simpler option.

Using a conventional air spring and a fixed-volume air chamber separated by an orifice, the design creates a force that is 180 degrees out of phase with the force-in function.

Isolation improves because the initial force from the input is absorbed totally by the spring with no damping. Damping occurs naturally and only when needed. Damping forces up to 30% of critical have been measured.

Charles Van Breemen, Inventioneering, 1807 Douglas Ave., Clearwater, FL 33755; Tel: (727) 446-8400; Fax: (727) 446-8900; E-mail: [email protected].

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