Magnetic coil for pulsed electromagnetic field
First Claim
1. A therapeutic coil for pulsed electromagnetic fields comprising:
- a core comprising layers of insulating material and magnetic shielding material;
an electrical conductor wrapped a plurality of turns around said core to form a coil;
wherein, said core comprises alternating layers of said insulating material and said magnetic shielding material.
0 Assignments
0 Petitions
Accused Products
Abstract
A portable electronic PEMF apparatus comprises a PEMF coil, power supply, and electronic switching means contained therein. The power supply along with the switching means provide periodic electric power to the PEMF coil. The PEMF coil comprises multiple turns of a conductive wire around a core with an elongated cross section. The core comprises a magnetic shield layer of materials such as mu metal or soft iron. The power supply comprises a battery, a regulated voltage source and unregulated voltage source from the battery and electronic switching circuit, powered by the regulated voltage, for electrically connecting the unregulated voltage source to the coil. The electronic switching circuit is tuned to periodically provide power to the coil at a frequency to generate a non-inverting, varying electromagnetic field from the coil.
-
Citations
13 Claims
-
1. A therapeutic coil for pulsed electromagnetic fields comprising:
-
a core comprising layers of insulating material and magnetic shielding material;
an electrical conductor wrapped a plurality of turns around said core to form a coil;
wherein, said core comprises alternating layers of said insulating material and said magnetic shielding material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
said core comprises a curved portion adapted to fit in close contact with a portion of a patient receiving treatment. -
6. The therapeutic coil of claim 5 wherein
said curved portion is shaped to fit a human wrist, hand or shoulder. -
7. The therapeutic coil of claim 1 wherein
a substantially rigid support means is fixed to said coil. -
8. The therapeutic coil of claim 7 wherein
said substantially rigid support means is metallic. -
9. The therapeutic coil of claim 1 further comprising
electrostatic discharge shielding means substantially enclosing said coil. -
10. The therapeutic coil of claim 1, further comprising heating means for applying heat to a body part in proximity to said coil.
-
11. The therapeutic coil of claim 10, wherein the heating means is an electrical resistance heater.
-
12. The therapeutic coil of claim 10, wherein the heating means is a chemical heater.
-
-
13. A system for generating a pulsed electromagnetic field for a therapeutic coil, said system comprising:
-
a core comprising layers of insulating material and magnetic shielding material;
an electrically conductive wire wrapped a plurality of turns around said core to form a coil;
a battery for causing a current to flow in said coil to generate a magnetic field;
a solid state switching circuit connected to said battery and said coil for controlling current flow from said battery and to said coil;
a control circuit for operating said solid state switching circuit at a frequency; and
wherein said core comprises alternating layers of said insulating material and said magnetic shielding material.
-
Specification
-
- Resources
-
Current AssigneeOrthosoft LLC (Zimmer Biomet Holdings, Inc.)
-
Original AssigneeOrthosoft LLC (Zimmer Biomet Holdings, Inc.)
-
InventorsBlackwell, Lyman L.
-
Primary Examiner(s)Lacyk, John P.
-
Application NumberUS09/392,750Time in Patent Office509 DaysField of Search600/9-15US Class Current600/13CPC Class CodesA61F 7/007 characterised by electric h...A61F 7/034 FlamelessA61N 2/02 using magnetic fields produ...
