Patent ID: 8079358

Claim:
A firebox air control regulator for controlling combustion comprising: a hollow body having an inlet and an outlet and forming a channel for air to flow through said body, said outlet being pneumatically connected to an inlet to a firebox, a disc located within said body and being movable along a first support rod attached to said body, said disc being situated to provide resistance to said airflow, said body comprising an inner surface configured to form said airflow into air columns as air is drawn through said body and around said disc, a lower portion of said inner surface comprising an ovaloid opening that is larger than the circumference of said disc, said lower portion of said inner surface forming a plurality of intermittently-spaced, arc-shaped depressions and scalloped regions, said inner surface providing an air passage of varying size as said disc moves along said first support rod, upper and lower stop members to limit the maximum movement of said disc, wherein said support bar is rotationally and longitudinally adjustable by a first fixing member and said first support rod further comprise a lower stop member and said upper stop member is supported by a second support rod affixed to said support bar, whereby, when air is not flowing through said body, said disc is held by gravity against said lower stop member, thereby creating an opening for air to commence flowing, and when air does commence flowing, said disc moves along said first support rod toward said upper stop member in response to airflow entering said ovaloid opening such that said intermittently-spaced, arc-shaped depressions and scalloped regions form variable-sized gaps between said inner surface and said disc, said gaps causing air entering said ovaloid opening to form into columns as it passes the edge of said disc, said columns of air supporting and stabilizing said disc and being automatically regulated by the movement of said disc within said body such that movement of said disc controls combustion within said firebox.