Smokeless fire pit ring

Abstract

A portable smokeless fire pit ring designed for insertion into pre-existing fire pits to reduce smoke emissions is disclosed. The disclosed device addresses the problem of smoke irritation by enhancing combustion efficiency through a tubular body with upper and lower edges, and a flange for support. The tubular body features upper and lower air holes, with a significant difference in their diameters to facilitate a specific airflow pattern. This pattern channels smoke and heat back into the fire chamber, promoting further combustion of gases and reducing smoke. The fire pit ring is particularly useful in campsites or parks where space is limited, allowing for a smokeless fire experience without the need for a separate fire pit. The primary use of the disclosed device is to provide a smokeless fire environment by improving air circulation within the fire chamber.

What is claimed is: 
     
         1 . A portable smokeless fire pit ring for insertion into a pre-existing fire pit, the portable smokeless fire pit ring comprising:
 a tubular body having a circular configuration and defined by an upper edge and a lower edge, said tubular body being dimensioned to occupy a fire chamber of the pre-existing fire pit;   a row of upper air holes positioned adjacent to the upper edge of the tubular body, the cumulative cross-sectional area of said upper air holes being configured to establish an upper airflow into the fire chamber;   a row of lower air holes positioned adjacent to the lower edge of the tubular body, the cumulative cross-sectional area of said lower air holes being greater than that of the upper air holes to establish a lower airflow that channels smoke and heat back into the fire chamber; and   a flange extending radially from the tubular body adjacent to the upper edge, the flange being configured to seat on an upper surface of the pre-existing fire pit to support the tubular body therein in a used condition.   
     
     
         2 . The portable smokeless fire pit ring of  claim 1 , wherein the flange radially extends a flange distance so that in the used condition the tubular body is seated in the pre-existing fire pit there is a circumferential air gap between an exterior surface of the tubular body and the pre-existing fire pit of approximately two inches. 
     
     
         3 . The portable smokeless fire pit ring of  claim 2 , wherein a height of the tubular body is dimensioned so that in the used condition a lower air gap of approximately two inches is established between the lower edge and a base of the pre-existing fire pit. 
     
     
         4 . A portable smokeless fire pit ring, comprising:
 a tubular body having a circular configuration and defined by an upper edge and a lower edge, the tubular body configured to be inserted into a void so as to define a fire chamber in a used condition;   a flange extending radially from the upper edge, the flange configured to seat on an upper surface of a structure that defines the void to support the tubular body when inserted within the void;   a plurality of upper air holes formed near the upper edge, the upper air holes arranged to permit an upper airflow into the fire chamber; and   a plurality of lower air holes formed near the lower edge, the lower air holes having a cumulative cross-sectional area greater than that of the upper air holes to facilitate a greater lower airflow that channels smoke and combustion gases back into the fire chamber to enhance combustion efficiency.   
     
     
         5 . The portable smokeless fire pit ring of  claim 4 , wherein the flange radially extends a flange distance so that in the used condition the tubular body is seated in the structure there is a circumferential air gap between an exterior surface of the tubular body and the structure of approximately two inches. 
     
     
         6 . The portable smokeless fire pit ring of  claim 5 , wherein a height of the tubular body is dimensioned so that in the used condition a lower air gap of approximately two inches is established between the lower edge and a base of the structure.