Patent ID: 7061354
Filing Date: 2006-06-13
Classification: H01F

Abstract:
1. A method of affixing non-ferromaqnetic items of interest to a generally planar surface of a ferromagnetic object using a permanent magnet assembly, the method comprising: providing a non-ferromagnetic item of interest, a ferromagnetic object and a permanent magnet assembly comprising a single continuous shell of a magnetic material that has an outer configuration that consists of a generally hemispherical portion of a magic sphere or that consists of a generally horseshoe shaped portion of a magic cylinder and wherein the shell comprises a cavity and terminates in a surface that is generally planar for engaging the ferromagnetic object and the permanent magnet assembly further comprising an insert located in the cavity and wherein the shell and the insert combine to provide a force (F) of attraction that is greater than about 700 pounds found by the formula: where: B is a flux density (in Gaussian units); (B A is a cross-sectional area which equals approximately locating the item of interest between the permanent magnet assembly and the ferromagnetic object; and moving the permanent magnet assembly adjacent the item of interest and, in turn, the item of interest adjacent the ferromagnetic object.