US 12,112,889 B2
Magnetic coupling device
David H. Morton, Boulder, CO (US)
Assigned to Magswitch Technology, Inc., Superior, CO (US)
Appl. No. 18/288,140
Filed by MAGSWITCH TECHNOLOGY, INC., Superior, CO (US)
PCT Filed May 27, 2022, PCT No. PCT/US2022/031286
§ 371(c)(1), (2) Date Oct. 24, 2023,
PCT Pub. No. WO2022/251593, PCT Pub. Date Dec. 1, 2022.
Claims priority of provisional application 63/194,692, filed on May 28, 2021.
Prior Publication US 2024/0087784 A1, Mar. 14, 2024
Int. Cl. H01F 7/02 (2006.01)
CPC H01F 7/0252 (2013.01) 50 Claims
OG exemplary drawing
 
1. A magnetic coupling device for magnetically coupling to a ferromagnetic workpiece, comprising:
a housing;
a switchable magnetic flux source supported by the housing, the switchable magnetic flux source being switchable between at least an OFF state and an ON state; and
a plurality of pole portions, each having at least one workpiece engagement surface, the switchable magnetic flux source being positioned between the plurality of pole portions and the plurality of pole portions including
a first north pole portion having a first workpiece engagement surface,
a second north pole portion having a second workpiece engagement surface,
a first south pole portion having a third workpiece engagement surface, and
a second south pole portion having a fourth workpiece engagement surface,
wherein the second north pole portion and the second south pole portion are each positioned between the first north pole portion and the first south pole portion and the switchable magnetic flux source in an ON state is magnetically coupled to each of the first workpiece engagement surface of the first north pole portion, the second workpiece engagement surface of the second north pole portion, the third workpiece engagement surface of the first south pole portion, and the fourth workpiece engagement surface of the second south pole portion.