Patent ID: 7518479
Filing Date: 2009-04-14
Classification: A61M,H01F,H02K

Abstract:
1. An inline electromagnetic tool actuator, comprising an actuator housing; an elongated reciprocating armature located inside said housing, and adapted for reciprocating linear movement along a notional assembly axis; a tool assembly operatively attached to said armature; spaced-apart return permanent magnets located inside said housing and coaxially aligned with said armature, said return permanent magnets having respective inward facing surfaces defining respective magnetic poles, and at least one of said return magnets further defining a center opening through which said armature reciprocates; at least one drive permanent magnet affixed to an outside of said armature and arranged between said return magnets, said drive magnet having opposing outward facing surfaces each of like polarity to adjacent inward facing surfaces of said return magnets; and at least one magnet wire coiled about said armature, such that when electrically charged with an alternating current, said wire creates an alternating magnetic field causing said drive magnet to bounce back and forth between repelling forces of said return magnets, whereby said armature and attached tool assembly reciprocate relative to said housing.