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:
Jul. 16, 1985
Filed:
Mar. 31, 1983
Rudi Metz, Donzdorf, DE;
Herbert Scholl, Goppingen, DE;
EMAG Maschinenfabrik GmbH, Salach, DE;
Abstract
A lifting electromagnet for ferromagnetic workpieces has two composite cores which extend downwardly from a yoke. Each core has a first section which is rigid with the yoke and is surrounded by an exciting coil, a second section which is connected with the respective first section, and at least one third section which is movable with reference to the second section, either up or down or horizontally. The poles at the lower ends of the third sections make an angle of 120 degrees, the same as the poles at the lower ends of the second sections. The second sections are surrounded by induction coils, and a further induction coil is disposed between each pair of neighboring third sections. The distance between the second sections is less than the distance between the first sections, and the distance between the second sections exceeds the distance between each pair of third sections. Each pair of third sections forms part of an auxiliary magnet which is movable up and down or horizontally, depending on the nature of the workpieces which are to be lifted and transported by the electromagnet. An electromagnet with one or more horizontally movable auxiliary magnets is used for the transport of elongated workpieces, and an electromagnet with one or more vertically movable auxiliary magnets is used for the transport of large- or small-diameter workpieces.