Title: Electromagnetic dent puller

Abstract: An apparatus and method of electromagnetically pulling dents from conductive material. A coil is formed to direct an effective electromagnetic coupling to a limited area between the coil and a dented part. A nonconductive mold placed between the coil and part has openings to overlie the dent. The coil is first energized with a slowly rising current then is energized with a fast pulsing countercurrent to generate a strong pulling electromagnetic coupling.

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Inventors: Hansen, Karl A. (Seattle, WA, US)
Hendrickson, Iver Glen (Seattle, WA, US)

Application Number: 489290
Filing Date: 1974-07-17
Publication_date: 1976-12-21
Assignee: The Boeing Company (Seattle, WA)
Primary Class(es): 72/56 29/419.2, 72/705, 361/156
Other Classes:
US Patent Ref:

3196649	Jul, 1965	Furth	29/421.
3703958	Nov, 1972	Kolm	72/56.
3704506	Dec, 1975	Orr	72/56.
3810373	May, 1974	Quegrolx	72/56.

Other Refs: 2,030,497

Nov, 1970	FR

Primary Examiner: Mehr, Milton S.
Assistant Examiner:
Attorney: Case; Morris A., Donahue; Bernard A.