The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 07, 1992
Filed:
Sep. 07, 1990
John A Cadwell, Kennewick, WA (US);
Cadwll Industries, Inc., Kennewick, WA (US);
Abstract
Magnetic stimulator coils having a definable region wherein magnetic field intensity is greater than at other regions of the coil are disclosed. The definable region is formed by one or more corners in a coil and/or by a higher concentration of windings in one region of the coil. Because the magnetic field produced at the definable region of the windings is higher than at other regions, the location where stimulation is to occur is better defined when the definable region of a coil formed in accordance with the invention is suitably positioned on the skin of a patient and energized by a suitable power source. Preferably, the windings are splayed because splayed winding stimuator coils are more efficient than concentrated winding stimulator coils. Efficiency is better because magnetic field intensity is reduced where windings are splayed due to a reduction in mutual inductance. A less intense magnetic field results in the need for less power to create the desired magnetic field in the region where the windings are more concentrated.