Electromagnetic holding device

Details Electromagnetic holding device Electromagnetic holding device

1990-07-09

1991-08-20

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Work or object holding type

33561, 29568, H01F 704

Patent

active

050418068

ABSTRACT:
The invention is directed to an electromagnetic holding device which includes one or more permanent magnets and an electromagnet. The holding device releases and pulls in units which are held thereon. During an exchange operation, the field of the electromagnet is superposable on the field of the permanent magnet either in the same direction or in the opposing direction and thereby intensifies or neutralizes the holding force. In order to provide the smallest possible assembly volume and lowest weight with the highest possible holding force, the permanent magnet is disposed ahead of the electromagnet when viewed with respect to the exchange face. When the exchange part is pulled in, the field lines of the electromagnet run in a completely closed flux-conducting part which is not interrupted at any location by an air gap.

REFERENCES:
patent: 4637119 (1987-01-01), Schneider et al.

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