Patent ID: 7069787
Filing Date: 2006-07-04
Classification: G01M,Y10T

Abstract:
1. An electromagnetic apparatus for producing a vibratory motion in response to a signal from a power source, comprising: a bottom assembly comprising; a top assembly opposing the bottom assembly, said top assembly comprising; a spring assembly situated at least partially on the periphery of the bottom assembly and operative with the top assembly and bottom assembly to resiliently support the top plate in the presence of the at least a portion of an item of furniture placed on the top plate, wherein the spring assembly is configured such that substantially uniform resilient support is provided to the top plate when the at least a portion of an item of furniture is placed on the top plate in a location outside the center of the surface of the top plate; and a bushing material for providing transverse support of the top plate with respect to the base plate when a transverse force is exerted on the top plate.