Steven N Fredrickson

US Patent:

20130294832, Nov 7, 2013

Filed:

Jan 19, 2012

Appl. No.:

13/980253

Inventors:

Charles W. Dawson - Big Lake MN, US
Barry W. Mattson - Elk River MN, US
Thomas L. Triplett - Rockford MN, US
Steven H. Fredrickson - Minneapolis MN, US
Christopher A. Lins - Crystal MN, US

Assignee:

Graco Minnesota Inc. - Minneapolis MN

International Classification:

E01C 23/16
F23N 5/02

US Classification:

404 94, 431 13, 431 2

Abstract:

A flame safety system for a thermoplastic applicator comprises a gas burner and a flame indicator. The gas burner expels a jet of pressurized combustible gas from an outlet nozzle, and includes an attachment groove near the nozzle. The flame indicator includes an attachment ring configured to fit into the groove, thereby securing the flame indicator to the gas burner, and a flame path portion extending from the attachment ring into the jet of pressurized combustible gas. The flame path portion is formed from a material which incandescently glows whenever the jet of combustible pressurized gas is lit.