characterised by the use of a forced flow of gas, e.g. air

Full Title

Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems (lighting fixtures combined with outlets for air-treatment systems F24F13/078) > Cooling arrangements (air-treatment systems dissipating or using the heat of lighting fixtures F24F3/056) > characterised by the use of a forced flow of gas, e.g. air

Child Classifications

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• F21V 29/61 characterised by control arrangements
• F21V 29/63 using electrically-powered vibrating means; using ionic wind
• F21V 29/65 the gas flowing in a closed circuit
• F21V 29/67 characterised by the arrangement of fans