US 12,437,908 B2
Methods and apparatus for generating magnetic fields
Thomas A. Daniel, San Diego, CA (US); and Larry Stambaugh, San Diego, CA (US)
Assigned to PARANETICS, INC., San Diego, CA (US)
Filed by PARANETICS, INC., San Diego, CA (US)
Filed on Mar. 5, 2021, as Appl. No. 17/193,917.
Application 17/193,917 is a continuation of application No. 15/001,187, filed on Jan. 19, 2016, abandoned.
Prior Publication US 2021/0193357 A1, Jun. 24, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H01F 7/02 (2006.01); F16C 32/04 (2006.01); H01F 6/00 (2006.01); H01F 7/06 (2006.01); H02K 1/06 (2006.01); H02K 53/00 (2006.01)
CPC H01F 7/0231 (2013.01) [F16C 32/0423 (2013.01); H01F 6/00 (2013.01); H01F 7/0273 (2013.01); H01F 7/06 (2013.01); H02K 1/06 (2013.01); H02K 53/00 (2013.01); Y10S 74/09 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A magnetic device, comprising:
a first magnetic field generator configured to generate a first magnetic field pattern comprising a first magnetic field of a first polarity, and a second magnetic field and a third magnetic field both of a second polarity and located on either side of the first magnetic field; and
a second magnetic field generator coupled in series with the first magnetic field generator and configured to generate a second magnetic field pattern which is substantially identical to the first magnetic field pattern,
wherein at least one of the first and second magnetic field generators comprises:
a base including an upper surface, a lower surface, and an inner wall and an outer wall that are sandwiched between the upper surface and the lower surface, wherein the upper surface includes a first opening defined by the upper edge of the inner wall, the lower surface includes a second opening defined by the lower edge of the inner wall; and
the base further includes a set of magnet placement locations positioned around the inner wall of the base, each magnet placement location of the set of magnet placement locations being separated from other magnet placement locations of the set of magnet placement locations by a distance, d;
a set of magnets placed to cover a portion of the inner wall, wherein each of the magnets is positioned such that an axis of the magnet connecting the north pole and the south pole of the magnet forms a slanted angle with respect to the upper and lower surfaces;
wherein each magnet of the set of magnets has a width and the width of each magnet of the set of magnets is greater than the distance, d, separating each magnet placement location of the set of magnet placement locations;
wherein the set of magnets is positioned in a parabolic shape; and
wherein the base is ring-shaped, with each of the upper surface and the lower surface having circular shaped surface.