Patent ID: 8061210

Claim:
A moveable assembly for imparting motion to an object of furniture in response to electrical signals from audio/video equipment, comprising: a bottom portion; a moveable top portion opposing the bottom portion; an electromagnetic assembly, a portion of the electromagnetic assembly being integrated with the top portion and another portion of the electromagnetic assembly being integrated with the bottom portion in order to produce motion corresponding to a combination of frequencies in at least the top portion in synchronization with the electrical signals from the audio/video equipment; and a spring assembly capable of supporting the load from the object of furniture by providing resilient support between the bottom portion and the top portion, wherein the spring assembly comprises at least three discrete springs located at the periphery of the electromagnetic assembly such that at least part of each spring is co-planar with at least part of the electromagnetic assembly, and wherein the height of the spring assembly is substantially equal to the maximum distance between the bottom portion and the top portion.