Patent ID: 7637258
Filing Date: 2009-12-29
Classification: A47J

Abstract:
1. A charcoal BBQ grill assembly comprising: a circular annular air plenum having a right angled triangular cross section with a sloped inner plenum wall which slopes down from a larger diameter top of the annular air plenum to a smaller diameter at a plenum base, said sloped inner plenum wall defining an open funnel shaped combustion space having an open top heating space having said larger diameter and a bottom ash exit including a fire grate to support a fuel charge; the sloped inner plenum wall of said combustion space having a plurality of perforations, said perforations being spaced in concentric circles extending in even increments from above said fire grate upwardly towards the top of the combustion zone; said annular air plenum further comprising an air inlet duct installed into the plenum base and to which is mounted a primary variable speed blower to supply primary combustion air into said annular air plenum thereby enabling controlled air distribution into the combustion zone through said perforations; said BBQ grill assembly further comprising an ash storage assembly fitted to the bottom ash exit, said ash storage assembly having a secondary air duct and a secondary variable speed blower fitted into the side of said ash storage assembly; said BBQ grill assembly further comprising a 360 degree horizontal slot air diffuser positioned on the central vertical axis of said combustion chamber above the top of said combustion space and operable to project a lateral air sheet medially between a top of said combustion space and a cooking grill, wherein said lateral air sheet intercepts and disperses flare-ups and smoke caused by meat fats dripping onto hot coals.