The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 22, 1980
Filed:
Jul. 27, 1978
Toshio Nagata, Tokyo, JP;
Abstract
An electromagnetic lifting device comprising a plurality of electromagnets having a variety of individual magnetic pole face areas and an inverted generally U- or W-shape connected with each other and further rigidly connected to a suspension member, and specifically adapted to electromagnetically lift up only a single sheet of ferromagnetic metal sheet by energizing a selected one or plurality of the electromagnets to an extent of necessary and enough electromagnetic energy in accordance with a thickness of the single sheet of metal and exerting thus-produced electromagnetic force to that single sheet of metal so that only that single sheet of metal can be lifted upwardly away from a pile of such metal sheets.