A spring assembly includes a plurality of coils interconnected with one another in a spaced-apart relationship for causing the spring assembly to exert as force in a loading direction approximately normal to a tangent to a centerline of the plurality of coils in response to deflection of the spring assembly...http://www.google.com.au/patents/US5203849?utm_source=gb-gplus-sharePatent US5203849 - Canted coil spring in length filled with an elastomer
