John P O'Reilly

US Patent:

7483255, Jan 27, 2009

Filed:

Feb 13, 2006

Appl. No.:

11/353760

Inventors:

Peter Gefter - So. San Francisco CA, US
Scott Gehlke - Berkeley CA, US
John K. O'Reilly - San Francisco CA, US

Assignee:

Ion Systems - Alameda CA

International Classification:

H01H 50/12

US Classification:

361213, 361212

Abstract:

Ions for neutralizing electrostatic charge on an object are generated and delivered in a stream of gas flowing through a dielectric channel that surrounds a loop of conductive filament which forms an ionizing electrode. The loop is formed within a single plane, or within multiple planes, and is supported within the channel with a plane of the loop substantially aligned with flow of gas through the channel. A region of minimum field intensity within the bounded region of the loop electrode is oriented in alignment with substantially maximum velocity of gas flow through a cross section of the dielectric channel.