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  Burning wick structureUSPTO Application #: 20070190472Title: Burning wick structure Abstract: A burning wick structure includes an upper half portion and a lower half portion. The outer diameter of the upper half portion is larger than that of the lower half portion. The bottom surface of the lower half portion is provided with an insertion hole for being inserted by an end of a cotton thread. The top portion of the insertion hole is further provided with an evaporating region. A porous region having a larger thickness is formed between the evaporating region and the top portion of the upper half portion. The porous region is formed with at least one ventilating region having a smaller thickness. (end of abstract) Agent: Hdsl - Fairfax, VA, US Inventor: Kuo-Tung Chen USPTO Applicaton #: 20070190472 - Class: 431320000 (USPTO) Related Patent Categories: Combustion, Fibrous Wick Type Flame Holder, Liquid Fuel Container Carries Wick Guide Or Support The Patent Description & Claims data below is from USPTO Patent Application 20070190472. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a burning wick structure, and in particular to a burning wick structure, which is safe to use without hindering the catalytic burning. [0003] 2. Description of Prior Art [0004] Ceramics are water-absorbent by its physical nature, and thus also inherently have porosity and water-absorbency. For example, the standards of purchasing ceramic tiles and bricks must specify the range of the percentage of absorbing water. It is apparent that the water-absorbency of the ceramics is well known. [0005] As disclosed in Taiwan Patent Publication No.474839 entitled "Catalytic Burning Nozzle Having Porous Material", an open channel is provided on a nozzle, and the channel is in communication with the atmosphere through a hollow portion within the nozzle in order not to hinder the catalytic burning. However, such a conventional structure is prone to be potential dangerous since the burning liquid may spill out through the channel when a user accidentally turns over the burning device containing essential oil therein. Further, when in use, since the isopropyl alcohol contained in the burning liquid may burn insufficiently when heated, the isopropyl alcohol may escape from the open channel to be breathed in the human body. Therefore, such a conventional structure is not safe to use and seriously affects the health of the human body. [0006] In view of the above, the inventor attempts to overcome the foregoing drawbacks, employs related principles and thus provides a feasible design to efficiently improve the above drawbacks. SUMMARY OF THE INVENTION [0007] The present invention is to provide a burning wick structure, which is safe to use without hindering the normal effect of the catalytic burning. Further, the possibility of fire caused by accidentally turning over the burning device can be avoided, so that the potential danger of the burning wick can be greatly reduced. Moreover, the insufficient burning of the burning liquid can be effectively improved to avoid the exhausted isopropyl alcohol from being breathed in the human body to affect the heath. [0008] Accordingly, the present invention provides a burning wick structure comprising an upper half portion and a lower half portion. The outer diameter of the upper half portion is larger than that of the lower half portion. The bottom surface of the lower half portion is provided with an insertion hole for being inserted by an end of a cotton thread The top portion of the insertion hole is further provided with an evaporating region. A porous region having a larger thickness is formed between the evaporating region and the top portion of the upper half portion. The porous region is formed with at least one ventilating region having a smaller thickness. BRIEF DESCRIPTION OF THE DRAWINGS [0009] FIG. 1 is a perspective view showing the external appearance of the burning device of the present invention; [0010] FIG. 2 is a partial cross-sectional view of the burning device of the present invention; [0011] FIG. 3 is a schematic view showing the external appearance of the burning wick of a first embodiment of the present invention; [0012] FIG. 4 is a schematic cross-sectional view showing the burning wick of the first embodiment of the present invention; [0013] FIG. 5 is a schematic cross-sectional view showing the burning wick of a second embodiment of the present invention; [0014] FIG. 6 is a schematic cross-sectional view showing the burning wick of a third embodiment of the present invention; and [0015] FIG. 7 is a schematic cross-sectional view showing the burning wick of a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION [0016] In order to make the Examiner further understand the present invention, the characteristics and the technical contents of the present invention will be explained with reference to the detailed description and the accompanying drawings. However, it should be understood that the drawings are illustrative but not used to limit the scope of the present invention. [0017] FIG. 1 is a perspective view showing the external appearance of the burning device of the present invention, and FIG. 2 is a partial cross-sectional view of the burning device of the present invention. The present invention provides an improved structure of burning wick. The burning wick 10 is used for being arranged on a burning device 1 (such as an essential oil lamp). The burning device 1 mainly includes a hollow bottle body 11, a mouth cap 12 provided on a mouth 110 of the bottle body 11, a heat-resistant ring 13 provided on the top portion of the mouth cap 12, and the burning wick 10. The burning wick 10 is supported on the heat-resistant ring 13, and in turn is supported on the top portion of the mouth cap 12 by the heat-resistant ring 13 to expose outside. The lower portion of the burning wick 10 is connected to both ends of a cotton thread 14, so that the cotton thread 14 is suspended within the bottle body 11. With the above arrangement, the burning liquid (not shown, such as essential oil) within the bottle body 11 can be introduced to the burning wick 10 via the absorption of the cotton thread 14. [0018] With reference to FIGS. 3 and 4, the present invention lies in that the burning wick 10 is formed of a ceramic material with an upper half portion 100 and a lower half portion 101. The outer diameter of the upper half portion 100 is larger than that of the lower half portion 101. A narrowed neck portion 102 is formed between the upper half portion 100 and a lower half portion 101, so that the burning wick 10 can be supported on the heat-resistant ring 13. The bottom surface of the lower half portion of the burning wick 10 is provided with an insertion hole 103. The insertion hole 103 is a blind hole used for being inserted by one end of the cotton thread 14. The top portion of the insertion hole 103 is further provided with an evaporating region 104. A porous region 105 having a larger thickness is formed between the evaporating region 104 and the top portion of the upper half portion 100. The porous region 105 is formed with at least one ventilating region 106 having a smaller thickness. [0019] In the present embodiment, the ventilating region 106 is formed in such a manner that a recess 107 is recessed downwardly at the top surface of the upper half portion 100 with respect to the evaporating region 104. The recess 107 can be a circular groove or blind hole for narrowing the thickness of the ventilating region 106. As a result, the thickness of the porous region 105 becomes smaller in the ventilating region 106. With the smaller thickness, the external air can still enter the evaporating region 104 via the ventilating region 106 without hindering the catalytic burning. At the same time, owing to the formation of the ventilating region 106, when the user accidentally turns over the burning device 1, the ventilating region 106 can protect the burning liquid within the bottle body 11 from spilling out. Therefore, the spilled burning liquid can be avoided from burning, producing the safety in use. [0020] Further, as shown in FIG. 5, the ventilating region 106 can be formed in such a manner that a recess 107 is recessed upwardly at the top surface of the evaporating region 104. Further, as shown in FIG. 6, the ventilating region 106 can be formed in such a manner that each recess 107 is recessed at the top surfaces of the upper half portion 100 and the evaporating region 104, respectively. Further, as shown in FIG. 7, the ventilating region 106 can be even formed by recessing a plurality of recesses 107. Continue reading... Full patent description for Burning wick structure Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Burning wick structure patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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