Protective cover for air filter and for conduit connecting air filter to breathing mask
First Claim
1. For use by a firefighter or by another wearer in a hazardous environment exposing the wearer potentially to heat, flame, or both as well as to smoke or other chemical or biological agents, a combination comprising a breathing mask, a canister containing an air filter and having an air inlet or air inlets, a conduit connecting the canister to the breathing mask, and a protective cover for the conduit and for the canister, the protective cover comprising a fabric shell, defining a sleeve which covers the conduit, essentially as far as the breathing mask, which does not cover the breathing mask, and which covers the canister, except that the fabric shell has an air inlet or air inlets communicating with the air inlet or air inlets of the canister, the conduit extending through the fabric shell, and the fabric shell being made from a heat-resistant, flame-resistant fabric.
3 Assignments
0 Petitions
Accused Products
Abstract
A breathing mask worn by a firefighter or by another wearer in a hazardous environment exposing the wearer potentially to heat and/or flame as well as to smoke and/or other chemical and/or biological agents is provided with an air filter, which is contained in a canister having an air inlet or air inlets and being connected to the breathing mask via a conduit, and with a protective cover for the conduit and for the canister. The protective cover comprises a fabric shell, which covers the conduit, essentially as far as the breathing mask, and which covers the canister, except that the fabric shell has an air inlet or air inlets communicating with the air inlet or air inlets of the canister. The fabric shell is made from a heat-resistant, flame-resistant fabric, preferably an aluminized fabric, such as an aluminized knit comprising approximately 33% polybenzimidazole fibers and approximately 67% polyparaphenylene terephthalamide fibers. A flame-resistant mesh, preferably made from polybenzimidazole fibers, is interposed between the air inlet or air inlets of the fabric shell and the air inlet or air inlets of the canister.
66 Citations
5 Claims
- 1. For use by a firefighter or by another wearer in a hazardous environment exposing the wearer potentially to heat, flame, or both as well as to smoke or other chemical or biological agents, a combination comprising a breathing mask, a canister containing an air filter and having an air inlet or air inlets, a conduit connecting the canister to the breathing mask, and a protective cover for the conduit and for the canister, the protective cover comprising a fabric shell, defining a sleeve which covers the conduit, essentially as far as the breathing mask, which does not cover the breathing mask, and which covers the canister, except that the fabric shell has an air inlet or air inlets communicating with the air inlet or air inlets of the canister, the conduit extending through the fabric shell, and the fabric shell being made from a heat-resistant, flame-resistant fabric.
Specification