Apparatus and methods for arresting flame at a gas burner

1. A pancake burner assembly comprising:

a pancake burner having an inlet;

a burner tube configured to emit gas toward the inlet of the pancake burner;

a flame arrester device having a screen portion configured for placement at the inlet of the pancake burner and between the burner tube and the pancake burner, the flame arrester device configured to allow gas emitted from the burner tube toward the screen portion to pass through the screen portion to enter the pancake burner via the inlet of the pancake burner; and

the flame arrester device further configured to arrest a flame from the pancake burner by stopping combustion at the inlet of the pancake burner at the screen portion before the flame reaches the burner tube, whereby flashback of the flame from the pancake burner is prevented.

2. The pancake burner assembly of claim 1 , wherein the screen portion comprises a mesh configured to cover at least part of the inlet of the pancake burner.

3. The pancake burner assembly of claim 1 , wherein the screen portion comprises a stainless steel mesh.

4. The pancake burner assembly of claim 1 , wherein the screen portion comprises a 0.132-inch mesh.

5. The pancake burner assembly of claim 1 , further comprising a bracket for mounting the pancake burner thereon, the flame arrester device connected with the bracket.

6. The pancake burner assembly of claim 1 , wherein the screen portion is attached to at least a portion of an edge of the inlet of the pancake burner.

7. A water heater comprising the pancake burner assembly of claim 1 .

8. The pancake burner assembly of claim 1 , wherein the flame arrester device comprises an edge configured for attachment to a bracket supporting the pancake burner.

9. A gas pancake burner assembly for a water heater, the assembly comprising

a pancake burner for a gas water heater having a gas/air inlet;

a burner tube configured for connection with a gas control valve, the burner tube having a gas metering orifice configured to emit gas toward the gas/air inlet of the pancake burner;

a flame arrester device configured at the gas/air inlet of the pancake burner and between the gas metering orifice of the burner tube and the gas/air inlet of the pancake burner, the flame arrester device having a screen portion configured in the flame arrester device for allowing gas from the gas metering orifice to pass through the screen portion to enter the gas/air inlet of the pancake burner; and

the screen portion further configured to prevent a flame from the pancake burner from flashing back to the gas metering orifice by stopping combustion at the gas/air inlet of the pancake burner at the screen portion.

10. The gas burner assembly of claim 9 , wherein the screen portion comprises a stainless steel mesh.

11. The gas burner assembly of claim 9 , wherein the screen portion comprises a 0.132-inch mesh.

12. The gas burner assembly of claim 9 , further comprising a bracket connected between the burner tube and the gas water heater pancake burner, such that the bracket connects the burner tube and the gas water heater pancake burner, and holding an edge of the flame arrester device.

13. The gas burner assembly of claim 9 , wherein the screen portion is attached to at least a portion of an edge of the gas/air inlet of the pancake burner.

14. The gas burner assembly of claim 9 , wherein the screen portion comprises a mesh configured to cover at least part of the gas/air inlet of pancake burner.

15. A water heater comprising the gas pancake burner assembly of claim 9 .

16. A method of making a gas pancake burner assembly, the method comprising:

connecting a bracket between a burner tube and a gas pancake burner, such that the bracket connects the burner tube and the gas pancake burner, so as to allow air flow toward a gas/air inlet of the gas pancake burner; and

installing a flame arrester device at the gas/air inlet of the gas pancake burner and between the gas/air inlet of the gas pancake burner and the burner tube, the installing including positioning a screen portion of the flame arrester device to at least partly cover the gas/air inlet, so as to allow the air flow toward the gas/air inlet to pass through at least part of the screen portion of the flame arrester device and so as to stop combustion at the screen portion at the screen portion before the flame reaches the burner tube, thereby preventing flashback of a flame from the gas pancake burner.

17. The method of claim 16 , wherein the gas pancake burner is a water heater burner including the gas/air inlet, and wherein installing the flame arrester device comprises connecting the screen portion to at least a portion of an edge of the gas/air inlet of the water heater burner.

18. The method of claim 16 , wherein installing the flame arrester device comprises fastening an edge of the flame arrester device to an arm of the bracket.

19. The method of claim 16 , wherein the gas pancake burner is a water heater burner, and wherein installing the flame arrester device comprises affixing an edge of the flame arrester device between the water heater burner and an arm of the bracket.

20. The pancake burner assembly of claim 1 , wherein:

the pancake burner is a water heater pancake burner including the inlet;

the flame arrester device is configured for placement between the burner tube and the inlet of the water heater pancake burner, such that the flame arrester device is configured for placement in a position coaxial to the inlet of the water heater pancake burner; and

the gas orifice is coaxial to the inlet of the water heater pancake burner.