Fire shelter and method

1 . A shelter for protecting a person from fire and heat external to the shelter comprising:

a base;

a front wall extending up from the base;

a right wall extending up from the base and alongside the front wall;

a left wall extending up from the base and alongside the front wall;

a rear wall extending up from the base and alongside the front wall and the left wall and opposing the right wall;

a roof atop the front wall, the right wall, the left wall and the rear wall which together define a protected chamber from fire; the roof, the front wall, the right wall and the left wall each having a core made of a three dimensional metal matrix embedded in foam insulation with concrete positioned about the front wall, the right wall, the left wall, the rear wall and the roof; the concrete forming a continuous one piece concrete layer enveloping the roof, the front wall, the right wall, the left wall and the rear wall down to the base, the concrete layer forming a fire resistant seal with the base about the front wall, right wall, left wall, rear wall and the roof which protects the person in the chamber from the fire and heat of about 600 to about 700 degrees Fahrenheit for between about two hours to about four hours;

a heat reflective layer disposed on an external surface of each of the front wall, right wall, the left wall, the rear wall and the roof;

an inflammable layer in spaced relation to the reflective layer on each of the front wall, the right wall, the left wall, the rear wall and the roof forming an airgap between the inflammable layer and the reflective layer in each of the front wall, the right wall, the left wall, the rear wall, and the roof;

inflammable heat resistant spacers attached to and between the reflective layer and the inflammable layer of the front wall, the right wall, the left wall, the rear wall and the roof which maintain the inflammable layer in spaced relation with the reflective layer to define the airgap; and fasteners extending through the inflammable layer, the spacers, the reflective layer and the front wall, the right wall the left wall, the rear wall, and the roof to fix the inflammable layer, the spacers, and the reflective layer in place with the front wall, the right wall, the left wall, the rear wall, and the roof; and

a fire-resistant door disposed in either the front wall, the right wall, the left wall or the left wall which provides access to the chamber.

2 . The shelter of claim 1 including a cylinder storage section for storing compressed air cylinders to provide air to the chamber.

3 . The shelter of claim 2 including plumbing disposed in the chamber to attach to the cylinders to control air flow out of the cylinders into the chamber.

4 . The shelter of claim 3 including a hollow pipe extending up from the base, the pipe having a top and a bottom, the top having a one-way exhaust valve through which air from the chamber enters and vents through the pipe and out through the base, the bottom of the pipe attached to the base and in fluidic communication to outside the base.

5 . The shelter of claim 4 including a release port for the compressed air from the air cylinders to flow into the chamber, the release port in fluidic communication with the plumbing.

6 . The shelter of claim 5 wherein the release port is disposed adjacent the base and the rear wall, and the pipe is disposed adjacent the front wall and opposing the release port with the one-way exhaust valve adjacent the roof so isentropic cooling provided by the expansion of the compressed breathing air occurs.

7 . The shelter of claim 6 wherein the inflammable layer is formed of cement board.

8 . The shelter of claim 7 wherein the reflective layer disposed on the external surface of each of the front wall, right wall, the left wall, and the rear wall is one piece.

9 . The shelter of claim 8 including a metal frame in the front wall to which the door is attached.

10 . The shelter of claim 9 wherein the base includes a steel platform with fork pockets and a lifting eye at each corner for lifting the shelter.

11 . The shelter of claim 10 wherein the core of each wall and the roof includes a three dimensional modular panel comprised of three dimensional welded wire mesh embedded in expanded and non-flammable polystyrene foam.

12 . A method for protecting a person from fire and heat comprising:

providing the shelter of claim 1 ;

closing the fire-resistant door of the shelter; and

opening valves of compressed air cylinders in the shelter to flow the compressed air from the cylinders into the chamber of the shelter.

13 . A method of building the shelter according to claim 1 , the method comprising:

placing the front wall on the base so the front wall is extending up from the base;

placing the right wall on the base so the right wall is extending up from the base and alongside the front wall;

placing the left wall on the base so the left wall is extending up from the base and alongside the front wall;

placing the rear wall on the base so the rear wall is extending up from the base and alongside the front wall and the left wall and opposing the right wall;

placing the roof atop the front wall, the right wall, the left wall and the rear wall which together define the protected chamber from fire; and

attaching the fire-resistant door disposed in either the front wall, the right wall, the left wall or the left wall which provides access to the chamber.