Patent ID: 9581243
Date: 2017-02-28
CPC Classifications: F16J

Claim:
1. An emergency sacrificial sealing method of sealing that will continuing to seal in the event of hot air or fire, comprising the steps of: providing a filter; providing a base; providing said filter with a tubular filter element having an internal passage, a closed top, and an open bottom; providing said base with a base plate; providing a hole in said base plate; positioning said tubular filter element over said base plate directly connected to said base plate with said open bottom of said tubular filter element over said hole in said base; positioning a first seal material between said tubular filter element and said base plate to provide a seal of said tubular filter element to said base plate wherein said first seal material is a gel seal material; providing a second seal material that is a material that will expand when exposed to heat and will harden; and positioning said second seal material between said tubular filter element and said base plate and proximate said first seal material, wherein said first seal material and said second seal material are positioned relative to each other and relative to said tubular filter element and said base plate to seal said tubular filter element to said base plate; and upon the event of hot air or fire said second seal material will be activated and expand to continue to seal said tubular filter element to said base in the event of hot air or fire.