Vapor transfer food preparation and heating apparatus

Abstract From the Canadian patent

Food preparation apparatus involves a heat transmitting zone and a heat source located remotely from the transmitting zone. Heat energy is transferred from the heat source to the transmitting zone by a fluid vapor which travels from the heat source to the transmitting zone condenses upon, the transmitting zone and then returns in a liquid state to the heat source. In one described embodiment the apparatus includes a casing enclosing a working fluid and defining a relatively large flat cooking surface. Heat energy is transferred to the working fluid from a heat source across a perforated baffle by directing products of combustion through the baffle against a por-, tion of the fluid container …