Magnetic gripping apparatus having circuit for eliminating residual flux
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United States of America Patent
Stats
-
Sep 11, 1990
Grant Date -
N/A
app pub date -
May 26, 1989
filing date -
Jun 10, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnetic gripping apparatus, of the permanent magnet type, comprising a base plate and peripheral walls, at least a first and a second pole units, each pole unit comprising a main pole piece having an outer face defining a gripping surface, main permanent magnets arranged between said main pole pieces and said base plate, an intermediate pole member between said first and second pole units, said intermediate pole member extending from the base plate to the gripping surface and secondary magnets between the pole members and the pole pieces; a first electrical windings encircles each main magnet, said electrical winding being operatively conected to a control unit, and a residual flux eliminating circuit comprising a second electrical winding encircling said intermediate pole member, said second winding being operatively connected to a demagnetizing control unit.
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