Stoves and furnaces – Liquid heater – Fluid fuel burner for other than top-accessible vessel
Patent
1996-05-08
1997-11-25
Yeung, James C.
Stoves and furnaces
Liquid heater
Fluid fuel burner for other than top-accessible vessel
126344, 126265, 126373, 126 39E, 126 39BA, 431255, 431256, F24H 100
Patent
active
056900945
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a gas-flame heated kettle. More particularly, the invention provides a portable, efficient, safe, self-contained kettle and gas burner which can be operated in any location where there is an air atmosphere.
The provision of hot drinks is often appreciated by people who are away from their homes or workplaces, whether they are on an outing or picnic, or whether because of the demands of their professions, they are at an outdoor site where there is no available electric power. Soldiers on reserve duty also require hot drinks when out in the field.
The insulated thermos bottle has long provided a convenient method of holding small quantities of hot water or beverages. A well-designed thermos container will keep its contents relatively hot for a day, but provides unsatisfactory hot storage for longer periods of time.
For those travelling by automobile, there is available a water heater which is powered by the vehicle battery through the socket of the cigarette lighter. Water heating is rather slow; vehicle batteries are not intended for this type of service.
Small quantities of water can be suitably heated with chemical fuel tablets, provided that the water container is provided with suitable support means.
For those who are willing to search for natural fuel such as small tree branches and to build a fire therefrom, there is available a folding cooker which, when deployed, shields the fire and supports but does not shield a cooking vessel, which is not included in the cooker pack. The cooker is held in a compact belt pouch when not in use.
There is little doubt that, where larger quantities of hot fluid are required in a reasonably short time, the portable gas cooker provides the most convenient solution. Such devices comprise a container of cooking gas, which is rechargeable and usually has a capacity in the range of 0.5 to 5 kg, the container serving as a base for a gas burner, control tap and kettle stand, all of which are provided and connected to said container from above.
Similar but smaller gas flame cookers are available which are intended to be assembled to disposable gas containers, which usually hold between 150 and 500 grams of compressed cooking gas. The smallest size disposable container may be obtained for one-time use. No gas control is provided; the user simply punctures the upper dome of the container and ignites the emitted gas stream.
As is well-known to hikers and campers, the various flame-operated cookers described above require protection from strong winds, for two reasons. First, the area of the flame requires protection to prevent its extinction. Second, the fluid container also requires protection, as the high heat losses resulting from forced convection from the fluid container's outer walls will result in an unreasonably long heating time to bring the fluid to boil. Provision of such protection usually falls on the user.
There is no known portable fluid heating device which combines a protected burner and protected fluid container. Furthermore, the fuel-operated devices described above are not provided with their own ignition sources.
It is therefore one of the objects of the present invention to obviate the disadvantages of the prior art portable fluid heaters and to provide a gas-operated fluid heater for water, coffee, tea, soups and the like which is fast, efficient, self-contained and can be operated anywhere in the atmosphere.
The present invention achieves the above objectives by providing a gas-flame heated, self-contained kettle comprising a housing, a gas burner container within the housing, and a container for the fluid to be heated, positioned within the housing and above the burner. Exhaust ducts lead from an area above the burner, through the container and a surface thereof, to the outside. Excess heat and combustion gases are exhausted in heat-exchange contact with fluid via ducts in the container for augmented heating of the fluid with simultaneous protection and insulation of the housing.
While in most cases the fluid in the contai
REFERENCES:
patent: 3709198 (1973-01-01), Williams
patent: 3730165 (1973-05-01), Williams
patent: 3978844 (1976-09-01), Wilkens
patent: 4191173 (1980-03-01), Dedeian
patent: 4512328 (1985-04-01), Arad
patent: 4829981 (1989-05-01), Burrell
Huss Shmuel
Sheinfeld Naftali
Shmuelson Ilya
Etzion Metal Works
Yeung James C.
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