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US 5,295,476 AGranted
Gas hob
AssigneeBlue Circle Domestic Appliances Limited
InventorEric D. Herbert
Life of this patent
Estimating the term…
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AssigneeBlue Circle Domestic Appliances Limited
InventorEric D. Herbert
Estimating the term…
A gas hob has a glass ceramic top plate and gas fired heat radiating burner units below the top plate. Each burner unit has a lower plate which includes a number of concentric chambers. A ceramic burner plate is disposed over the lower plate. The burner plate is perforated to match the arrangement of concentric chambers to provide concentric gas burning rings. The supply of gas to the burner units is controllable by respective control valves enabling gas to be supplied only to the burner plate perforation at which supply of heat is required. A fan below the level of the burner units supplies air to a plenum chamber which communicates with ducts leading to the concentric chambers. The fan supplies combustion air at all times when a burner unit is in operation. Gas from the control valve mixes in the ducts with air from the plenum chamber before entering one of the concentric chambers and the gas burning ring.
A gas hob comprising a glass ceramic top plate, at least one gas-fired heat radiating burner unit arranged closely below said top plate, the or each unit having a multiplicity of chambers over which is disposed a ceramic burner plate perforated to match the pattern of said chambers, the chambers of each burner unit being in communication with respective associated air supply passages, an inlet to each passage having an orifice of a predetermined size to govern the amount of air entering the passage, in use, gas supply means to each air supply passage, fan means arranged to supply air through said air supply passage inlets to all the chambers of a burner unit at all times when gas is supplied to at least one chamber of said burner unit, supplied gas and air mixing prior to entering one or more of said chambers and thereafter one or more of said burner plate perforations, and means for independently controlling the supply of gas to each air supply passage.
Dependencies are inferred from the claim text.