Combustion – Flame holder and fuel tank assembly
Patent
1998-06-29
2000-01-04
Lazarus, Ira S.
Combustion
Flame holder and fuel tank assembly
431315, 431304, 431322, 431150, 431153, 431325, 431 35, 431 86, 126 96, 239 50, F23D 1428, F23D 328, F23N 500
Patent
active
060103345
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a combustion appliance for a liquid fuel, which is provided with a combustion wick for sucking up a liquid fuel, such as an alcohol fuel, and burning it.
This invention particularly relates to combustion appliances, such as lighters for smoker's requisites, other types of lighters, torches, lanterns, and other types of illumination devices, which utilize liquid fuels, such as alcohols, benzine types of hydrocarbons, or petroleum types of hydrocarbons, and which have a constitution such that the combustion time may be limited and the fire may be extinguished after the fuel has been burned for a predetermined length of time.
BACKGROUND ART
Ordinarily, as fuels in combustion appliances, such as lighters for smoker's requisites, other types of lighters, torches, and illumination devices, alcohol fuels, such as ethyl alcohol, petroleum benzine types of benzine fuels, or liquefied gas fuels, such as butane gas or propane gas, have heretofore been utilized.
The performances, the levels of convenience of handling, and the design structures of the combustion appliances vary in accordance with the kinds of the fuels used, and the fuels have their own features. For example, in cases where the liquefied gas fuels are used as the liquid fuels, since the liquefied gas fuels have a high gas pressure at temperatures falling within the range, in which the combustion appliance is used, the vessel for storing the fuels must have a pressure-resistant structure. Also, the flame length varies in accordance with variations in gas pressure. In particular, the liquefied gas fuels have the characteristics such that their gas pressures markedly vary logarithmically with respect to temperatures, and therefore the problems occur in that the flame length changes markedly, depending upon temperatures. In order for the change in flame length to be reduced, a special design countermeasure for carrying out temperature compensation for a fuel feeding mechanism of the combustion appliance must be taken. Therefore, the structure cannot be kept simple, and the cost cannot be kept low.
As for the liquid fuels, such as the alcohol fuels, they are liquids at normal temperatures and have comparatively low vapor pressures. Therefore, the fuel storing section need not have a pressure-resistant structure. Accordingly, the structure of the combustion appliance can be kept simple, and the cost can be kept comparatively low. In the combustion appliances for the liquid fuels, ordinarily, as means for feeding the liquid fuel from the fuel storing section to the burning section, a combustion wick, which sucks up the liquid fuel with the capillarity through open pores or through minute spaces formed between thin fibers in a fiber bundle and by the utilization of the surface tension of liquid fuel and allows the liquid fuel to burn at a top end portion of the wick, has heretofore been used. Specifically, in the combustion wick, the liquid fuel is sucked up by the utilization of a string-like wick formed by twisting fibers, a bundle of glass fibers, a wick formed by bundling glass fibers with cotton threads and interweaving thin metal wires for preventing the bundle from becoming loose, or the like. The lower end portion of the combustion wick has the functions for sucking up the liquid fuel, and the sucked-up fuel is burned at the top end portion of the wick.
Gas lighters utilizing a liquefied gas as the fuel, which are provided with mechanisms designed such that the fire may be extinguished automatically after a predetermined amount of fuel has been burned, have been proposed in, for example, Japanese Unexamined Patent Publication Nos. 7(1995)-190356, 7(1995)-158852, and 8(1996)-219456. The automatic fire extinguishing functions are constituted for various purposes. The mechanisms are designed such that a valve body may be operated in association with a lighting operation and the fuel gas fed from a fuel tank may be measured and burned.
However, with the mechanisms for burning a predetermined amount of fuel in t
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Kaga Yosimitsu
Mifune Hideo
Nakamura Yasuaki
Tsukamoto Takashi
Cocks Josiah C.
Lazarus Ira S.
Tokai Corporation
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