Patent ID: 6361253
Filing Date: 2002-03-26
Classification: B08B

Abstract:
A method of forming a fire break in a duct conveying a gas and entrained flammable particulate material which accumulates on an inside surface of said duct, said method comprising:suspending a flexible elongated nonmetallic element in said duct, conveying gas having flammable particulate material entrained therein through said duct in turbulent flow, causing said flexible nonmetallic element to continuously oscillate and flap within said duct striking said inside surface of said duct wherein said oscillating and flapping of said flexible nonmetallic element does not generate a spark between said element and said duct, removing accumulation of flammable particulate material from said inside surface of said duct in the area of said flexible elongated nonmetallic element, and creating a fire break in the accumulation of flammable particulate material preventing propagation of a flame through said duct.