Patent ID: 8927896
Filing Date: 2015-01-06
Classification: A61B,H05H

Abstract:
1. A battery powered handheld air plasma spray using ambient air as the working gas, said air plasma spray comprising: a pair of concentric electrodes, said electrodes consisting of a cylindrical rod-shaped inner electrode and a ring-shaped outer electrode; a ring-shaped permanent magnet placed upstream of the electrode ends and concentric with and around the inner electrode, permitting airflow between the electrode downstream ends; a position holder securing said inner electrode to be aligned axially with said outer electrode, said holder positioned upstream of the electrode ends and said ring-shaped magnet at a distance to allow air flow through the openings of said holder to the downstream ends of said electrodes to the discharge gap without being blocked by the ring magnet; a tube frame housing, said electrodes, ring-shaped magnet and position holder contained within said housing having an inlet end and an outlet end; a cap attached to the outlet end of the tube frame housing, said cap positioned downstream of the discharge ends of said electrodes for protecting the discharge ends of the electrodes; an air pump, said pump supplying air flow to the electrode discharge gap through a flexible air tube attached to the inlet end of said housing; a dc high-intensity-discharge (HID) ballast, said ballast providing high voltage spikes for triggering air breakdown and also providing the discharge voltage to said electrodes; an ignition circuit which generates voltage spikes of 2.5-3 kV; and a series LC matching circuit, said matching circuit connected in parallel with said electrodes.