Patent ID: 7078993
Filing Date: 2006-07-18
Classification: B21D,H01F,Y10S,Y10T

Abstract:
1. An electromagnetic dent remover for electromagnetically removing dents from conductive materials, the dent remover comprising: a power source configured to produce a first pulse having a predetermined polarity and rise time and a second pulse having a polarity opposite to the predetermined polarity of the first pulse and a rise time shorter than the rise time of the first pulse; a control circuit coupled to the power supply means for causing the power supply to produce the first pulse at a first time and the second pulse at a second time subsequent to the first time; and, an electric coil for receiving the first pulse at the first time and the second pulse at the second time, the electric coil being formed from a substantially flat strip of an electrically conductive metal, the strip having opposite planar surfaces at least one of which is covered by a dielectric material, the strip having first and second end portions, the strip being wound so that the opposite planar surfaces are substantially adjacent to each other, the coil being disposed about an axis of symmetry that is approximately perpendicular to the surfaces and extending through a keel portion configured to concentrate electromagnetic flux at a midpoint on the axis of symmetry.