Magnetic apparatus for mounting on curved ferromagnetic surfaces

Patent metadata

Field	Value
Publication number	US-12488921-B1
Application number	US-202318445362-A
Country	US
Kind code	B1
Filing date	Aug 1, 2023
Priority date	Aug 1, 2023
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

A magnetic apparatus for magnetic attachment to a curved ferromagnetic surface. The magnetic apparatus includes a plurality of ferromagnetic plates and a plurality of magnets. Each ferromagnetic plate includes a concave end for mounting on a curved ferromagnetic surface. The ferromagnetic plates and magnets are in an alternating arrangement where each magnet is positioned between a pair of the ferromagnetic plates. The magnets are oriented such that like magnetic poles of the magnets oppose each other. Each magnet is sized so that the magnet does not contact the curved ferromagnetic surface. The magnetic apparatus includes an assembly for joining the ferromagnetic plates and magnets together. Each magnet firmly abuts the pair of the ferromagnetic plates thereby allowing the ferromagnetic plates to become magnetically saturated. The magnetic apparatus includes a load-spreading member attached to all of the ferromagnetic plates for distributing loads among the ferromagnetic plates.

First claim

What is claimed is:

1 . A magnetic apparatus, comprising;
a plurality of ferromagnetic plates, each ferromagnetic plate includes a concave end for mounting on a curved ferromagnetic surface; a plurality of magnets being configured in an alternating arrangement with the ferromagnetic plates, wherein each magnet is positioned between a pair of the ferromagnetic plates, wherein the magnets are oriented so that like magnetic poles of the magnets oppose each other, and wherein each magnet is sized such that the magnet does not contact the curved ferromagnetic surface; and an assembly for joining the ferromagnetic plates and magnets together so that each magnet firmly abuts said pair of the ferromagnetic plates thereby allowing the ferromagnetic plates to become magnetically saturated.

2 . The magnetic apparatus according to claim 1 , wherein each magnet is a rectangular shaped magnet.

3 . The magnetic apparatus according to claim 1 , wherein each ferromagnetic plate includes a first height and each magnet includes a second height that is less than the first height.

4 . The magnetic apparatus according to claim 1 , wherein each ferromagnetic plate has at least one thru-hole and each magnet has at least one thru-hole, and
wherein the assembly comprises an elongate member extending through the thru-holes of the ferromagnetic plates and magnets, and a set of fasteners engaged with the elongate member to retain the elongate member within the thru-holes of the ferromagnetic plates and magnets.

5 . The magnetic apparatus according to claim 4 , wherein the elongate member is configured with threads and the set of fasteners are threadedly engaged with the elongate member.

6 . The magnetic apparatus according to claim 1 , wherein each ferromagnetic plate has a first thru-hole and a second thru-hole and each magnet has a first thru-hole and a second thru-hole, wherein the first thru-hole of each ferromagnetic plate is aligned with the first thru-hole of each magnet, wherein the second thru-hole of each ferromagnetic plate is aligned with the second thru-hole of each magnet, and wherein the assembly comprises:
a first elongate member extending through the first thru-holes of the ferromagnetic plates and magnets; a first set of fasteners being engaged with the first elongate member to retain the first elongate member within the first thru-holes of the ferromagnetic plates and magnets; a second elongate member extending through the second thru-holes of the ferromagnetic plates and the magnets; and a second set of fasteners engaged with the second elongate member to retain the second elongate member within the second thru-holes of the ferromagnetic plates and the magnets.

7 . The magnetic apparatus according to claim 6 , wherein the first elongate member and second elongate member are configured with threads, and wherein the fasteners of the first set of fasteners are threadedly engaged with the first elongate member and the fasteners of the second set of fasteners are threadedly engaged with the second elongate member.

8 . The magnetic apparatus according to claim 1 , further comprising a load-spreading member being attached to all of the ferromagnetic plates for distributing loads among the ferromagnetic plates.

9 . The magnetic apparatus according to claim 8 , wherein each ferromagnetic plate has a thru-hole therein, and wherein the load-spreading member is disposed within the thru-hole of each ferromagnetic plate.

10 . The magnetic apparatus according to claim 1 , wherein each ferromagnetic plate is fabricated from a ferromagnetic metal selected from ferrous steel, iron, nickel cobalt and alloys thereof.

11 . The magnetic apparatus according to claim 1 , wherein each magnet is a neodymium magnet.

12 . A magnetic apparatus, comprising;
a plurality of ferromagnetic plates, each ferromagnetic plate includes an inwardly curved end for mounting on a curved ferromagnetic surface; a plurality of magnets being configured in an alternating arrangement with the ferromagnetic plates wherein each magnet is positioned between a pair of the ferromagnetic plates, wherein the magnets are oriented so that the north pole of each magnet opposes the north pole of another magnet and the south pole of each magnet opposes the south pole of another magnet, and wherein each magnet is configured as a bar magnet that is sized so as to preclude the magnet from contacting the curved ferromagnetic surface; and an assembly for joining the ferromagnetic plates and magnets together such that each magnet firmly abuts said pair of the ferromagnetic plates thereby allowing the ferromagnetic plates to become magnetically saturated.

13 . The magnetic apparatus according to claim 12 , further comprising a load-spreading member being attached to all of the ferromagnetic plates for distributing loads among the ferromagnetic plates.

14 . The magnetic apparatus according to claim 13 , wherein each ferromagnetic plate includes a thru-hole therein, and wherein the load-spreading member is disposed within the thru-hole of each ferromagnetic plate.

15 . A magnetic apparatus, comprising;
a plurality of ferromagnetic plates, each ferromagnetic plate includes a first thru-hole, a second thru-hole and an inwardly curved end for placement on a curved ferromagnetic surface; a plurality of magnets in an alternating arrangement with the ferromagnetic plates such that each magnet is positioned between a pair of the ferromagnetic plates, wherein the magnets are oriented such that like magnetic poles of the magnets oppose each other, wherein each magnet is configured so that the magnet does not contact the curved ferromagnetic surface, each magnet includes a first thru-hole and a second thru-hole, wherein the first thru-hole of each ferromagnetic plate is aligned with the first thru-hole of each magnet, and wherein the second thru-hole of each ferromagnetic plate is aligned with the second thru-hole of each magnet; and an assembly for joining the ferromagnetic plates and magnets together so that each magnet firmly abuts said pair of the ferromagnetic plates thereby allowing the ferromagnetic plates to become magnetically saturated,
wherein the assembly comprises a first elongate member extending through the first thru-holes of the ferromagnetic plates and magnets;
a first set of fasteners engaged with the first elongate member to retain the first elongate member within the first thru-holes of the ferromagnetic plates and magnets;
a second elongate member extending through the second thru-holes of the ferromagnetic plates and the magnets; and
a second set of fasteners engaged with the second elongate member to retain the second elongate member within the second thru-holes of the ferromagnetic plates and the magnets.

16 . The magnetic apparatus according to claim 15 , wherein each ferromagnetic plate includes a first height and each magnet has a second height that is less than the first height.

17 . The magnetic apparatus according to claim 16 , wherein each magnet is a rectangular shaped magnet.

18 . The magnetic apparatus according to claim 15 , further comprising a load-spreading member being attached to all of the ferromagnetic plates for distributing loads among the ferromagnetic plates.

19 . The magnetic apparatus according to claim 18 , wherein each ferromagnetic plate includes a thru-hole therein, and wherein the load-spreading member is disposed within the thru-hole of each ferromagnetic plate.

20 . The magnetic appar

Assignees

• Us Navy

Inventors

• Pegouske Adam
• Foltz Lee
• Strackbein Bruce
• Shattuck Mike

Classifications

• H01F7/021

  Construction of PM (H01F7/0278 takes precedence; PM compositions H01F1/032) · CPC title

• H01F7/0221

  Mounting means for PM, supporting, coating, encapsulating PM · CPC title

• H01F7/0252 Primary

  PM holding devices (H01F7/021, H01F7/0215, H01F7/0226 take precedence) · CPC title