US 11,752,357 B2
Pulsed electromagnetic field therapy device
Paul Beddard, Witney (GB)
Assigned to Hofmeir Magnetics Limited, Witney (GB)
Appl. No. 16/764,783
Filed by Hofmeir Magnetics Limited, Witney (GB)
PCT Filed Nov. 16, 2018, PCT No. PCT/GB2018/053335
§ 371(c)(1), (2) Date May 15, 2020,
PCT Pub. No. WO2019/097254, PCT Pub. Date May 23, 2019.
Claims priority of application No. 1719104 (GB), filed on Nov. 17, 2017.
Prior Publication US 2021/0370086 A1, Dec. 2, 2021
Int. Cl. A61N 2/02 (2006.01); A61N 2/00 (2006.01)
CPC A61N 2/02 (2013.01) [A61N 2/006 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A pulsed electromagnetic field therapy device comprising:
a parallel resonant circuit comprising a capacitor connected in parallel with an inductor without a switch between the capacitor and the inductor in the parallel resonant circuit;
a power source having a voltage of between 50 V and 400 V;
a switch, external to the parallel resonant circuit, and connected in between the power source and the parallel resonant circuit; and
a controller which is configured to: close the switch to connect the parallel resonant circuit to the power source for a current ramping period during which a current in the inductor is increased to reach a predetermined current between 10 A and 2000 A, and open the switch at an end of the current ramping period to disconnect the parallel resonant circuit from the power source, wherein the parallel resonant circuit generates a pulsed electromagnetic field comprising a sequence of damped sinusoidal electromagnetic oscillations in the inductor while electrical energy is stored in the parallel resonant circuit and whilst the switch is open,
wherein the inductor is configured to be placed relative to a part of a body to provide the pulsed electromagnetic field to the part of the body.