Patent ID: 7280020

Claim:
A magnetic inertial force generator comprising: a shell internally defining an armature chamber having an axis; at least two circumferential electric coils spaced axially within the chamber; an armature supported in the chamber for reciprocation on the axis, the armature including at least two axially spaced permanent magnets mounted on an axially extending exterior of an axially extending magnetic core that supports the magnets over approximately their full axial lengths; resilient members nominally centering the armature in the chamber; the permanent magnets extending axially, inwardly adjacent and in general alignment with the electric coils; the magnets having radially extending flux lines passing through the coils and the magnets and maintaining a continuous flux path between the magnets and the core through the mounting of the magnets on the axially extending exterior of the magnetic core over the approximately full lengths of the magnets; and controlled energizing of the coils being operative on the permanent magnets to reciprocate the armature axially in a controlled manner relative to the shell to develop an opposite alternating inertia force on the shell for application to a connected body.