# Patent

## Title
Metallic wick

## Abstract

A metallic wick includes at least one mesh member having first and second ends disposed opposite to each other, first and second surfaces respectively extended from the first end to the second end thereof and arranged opposite to each other, a plurality of meshes penetrating the first and second surfaces between the first and second ends thereof, and a transport channel extending from the first end to the second end thereof and drawing fuel by capillary action.

## Background
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a wick and, more particularly, to a wick made of metal and provided for being mounted to a lamp device for quickly igniting fuel.
2. Description of the Related Art
A conventional lamp device includes a fuel cup storing fuel, a high temperature resistant disk mounted on the fuel cup, and a wick inserted through the disk to connect with fuel stored in the fuel cup. Moreover, the wick is normally made out of braided cotton and works by capillary action. Fuel is drawn up through the wick to reach the flame produced on the disk. The above lamp device is actively used for various purposes, such as lighting, decorating, or increasing atmosphere. For example, an oil lamp is used in religion, or an alcohol lamp is used in medical or chemical laboratories.
The conventional cotton wick must be cut to a predetermined length adapted for being mounted to the lamp device. However, after trimming, the cotton wick is easily loosened at its terminal end to cause it to be difficult to insert through the disk. After ignition, fuel vaporizes and combusts on the wick, and the tip of the cotton wick will be carbonized and burnt out gradually on the tip due to a higher temperature on the top of flame. Thus, the cotton wick must be pulled out from the disk and trimmed to a certain length every once in a while to maintain a combustion scale. Trimming the cotton wick results in the wick eventually being unconnected with fuel, so that users can only replenish fuel or replace a new wick. It is inconvenient and wasteful.
The wick length, diameter, stiffness and fire-resistance are the major factors used to adjust fuel wicking and flame scale for the lamp device. However, cotton wicks with low stiffness and fire-resistance cannot be adjusted easily to maintain proper fuel wicking and flame scale. High viscosity or high flash point fuels result in carbon deposits being produced and are difficult to ignite. If the fuel drawn is slower than it burns, the wick will be carbonized and become burnt out. If the fuel drawn is more than it burns, usually occurring on burning high flash point fuel, slow evaporation of the fuel will be caused, producing soot due to incomplete combustion. Incomplete combustion not only produces soot but also toxic fumes.
Taiwan Patent No. 493,722 discloses a wick including a plurality of fiberglass filaments disposed and assembled at a center thereof to forma fiberglass layer, and a plurality of fiberglass yarns and melted silks arranged around the fiberglass layer. The fiberglass layer is able to draw fuel by capillary action, is hard to burn down, and is not easily loosened at its terminal end. However, the fiberglass layer does not draw fuel effectively causing the flame to extinguish easily, and the flame scale is difficult to be controlled. Moreover, Taiwan Patent No. 580,106 discloses a wick including a cotton thread enabling fuel to be drawn and a plurality of fiberglass filaments covering around the cotton thread to avoid the cotton thread from becoming loosened to provide a compound wick.
Therefore, the wick disclosed by said patents both include fiberglass filaments, but the fiberglass is expensive and difficult to process. The wick is a large quantity of consumable items, but the fiberglass wick is expensive and not environment-friendly. Additionally, when the fiberglass wick is processed, inhaling the fiberglass can cause damage to human lungs and can be harmful to manufacturing personnel. Inhaling of fiberglass will jeopardize the health of workers during fiberglass-reinforced plastic processing. The fiberglass fiber can also cause skin, eye and throat irritation to users. At higher exposure levels, fiberglass also has been associated with skin rashes and difficulty in breathing.
Likewise, a fiberglass wick will be carbonized and burned out during combustion, but only slower than cotton wick, so that the fiberglass wick needs be trimmed also. Furthermore, the fiberglass wick and the cotton wick are easy to sag due to gravity when they are saturated with fuel. Thus, the user cannot adjust the flame height or scale easily. If a user wants to adjust the flame height or scale, the user has to pull the wick out from the lamp device constantly. At the same time, the user may also contact fuel in the wick and cause inconvenience or even danger.
The present invention is, therefore, intended to obviate or at least alleviate the problems encountered in the prior art.
SUMMARY OF THE INVENTION
The present invention resolves these requirements and other problems in the field of a metallic wick including at least one mesh member having first and second ends disposed opposite to each other, first and second surfaces respectively extended from the first end to the second end thereof and arranged opposite to each other, a plurality of meshes penetrating the first and second surfaces between the first and second ends thereof, and a transport channel extending from the first end to the second end thereof drawing fuel by capillary action.
In an example, the metallic wick generally includes a mesh member rolled into a tubular shape and having a plurality of circles spaced from each other along a longitudinal axis to form an Archimedean spiral cross-section perpendicular to the longitudinal axis.
In another example, the metallic wick includes a plurality of mesh members respectively rolled into the plurality of different-sized tubes assembled and radially spaced from each other along a longitudinal axis to form a concentric circular cross section perpendicular to the longitudinal axis.
In a further example, the metallic wick includes a plurality of mesh members spaced from each other and arranged in a longitudinal stacked array.
In a further example, the metallic wick includes a mesh member bent to form a stacked array.
Preferably, each of the plurality of meshes is formed in a quadrilateral shape, such as a square or rhombus.
Preferably, the mesh member is formed in a flat shape.
An advantage of the metallic wick according to the present invention is that the metallic wick cannot be carbonized or consumed to maintain a fixed height thereof to maintain the flame combustion scale.
Another advantage of the metallic wick according to the present invention is that the metallic wick includes an end producing the flame thereon and heated by the flame to cause fuel drawn to the end thereof to be vaporized and combusted more completely due to a higher wick temperature.
A further advantage of the metallic wick according to the present invention is that the number of circles, the size of meshes, the surface roughness and the coating materials of the mesh member are adjustable to control the ability of capillary action adapted for wicking various fuels with different viscosity, so that the metallic wick can draw more viscous fuel faster to the tip thereof and can be ignited shortly (one minute or less) after inserting the wick in fuel.
A further advantage of the metallic wick according to the present invention is that the metallic wick does not loosen at its terminal end after cutting a predetermined length or trimming to be mounted to a lamp device.
A further advantage of the metallic wick according to the present invention is that the metallic wick is made of metal, reducing manufacturing costs to provide a popular price. In a preferred form, the metallic wick can be formed by a common metal wire mesh.
The present invention will become clearer in light of the following detailed description of illustrative embodiments of this invention described in connection with the drawings.



BRIEF DESCRIPTION OF THE DRAWINGS
The illustrative embodiments may best be described by reference to the accompanying drawings where:
FIG. 1 shows a perspective view of a metallic wick of a first embodiment according to the present invention.
FIG. 2 shows an exploded, perspective view of the metallic wick of FIG. 1.
FIG. 3 shows a top view of the metallic wick of FIG. 1.
FIG. 4 shows a perspective view of the metallic wick of FIG. 1, and illustrates the metallic wick mounted to a lamp device.
FIG. 5 shows a cross-section view of FIG. 4.
FIG. 6 shows a perspective view of the metallic wick of FIG. 1, and illustrates three metallic wicks mounted to another lamp device.
FIG. 7 shows an exploded, perspective view of the metallic wick of FIG. 6.
FIG. 8 shows a cross-section view of FIG. 6.
FIG. 9 shows an exploded, perspective view of the lamp device of FIG. 6.
FIG. 10 shows a cross-section view taken along line 10-10 of FIG. 9.
FIG. 11 shows a continued view of FIG. 10, and illustrates a film detached from a cap of the lamp device.
FIG. 12 shows a perspective view of a metallic wick of a second embodiment according to the present invention.
FIG. 13 shows an exploded, perspective view of the metallic wick of FIG. 12.
FIG. 14 shows a top view of the metallic wick of FIG. 12.
FIG. 15 shows a perspective view of a metallic wick of a third embodiment according to the present invention.
FIG. 16 shows an exploded, perspective view of the metallic wick of FIG. 15.
FIG. 17 shows a partial, enlarged side view of FIG. 15.
FIG. 18 shows a perspective view of a metallic wick of a fourth embodiment according to the present invention.
FIG. 19 shows an exploded, perspective view of the metallic wick of FIG. 18.
FIG. 20 shows a top view of the metallic wick of FIG. 18.



All figures are drawn for ease of explanation of the basic teachings only; the extensions of the figures with respect to number, position, relationship, and dimensions of the parts to form the illustrative embodiments will be explained or will be within the skill of the art after the following teachings have been read and understood. Further, the exact dimensions and dimensional proportions to conform to specific force, weight, strength, and similar requirements will likewise be within the skill of the art after the following teachings have been read and understood.
Where used in the various figures of the drawings, the same numerals designate the same or similar parts. Furthermore, when the terms “first”, “second”, “third”, “fourth”, “end”, “portion”, “longitudinal”, “radial”, “diameter”, “width”, “thickness”, and similar terms are used herein, it should be understood that these terms have reference only to the structure shown in the drawings as it would appear to a person viewing the drawings and are utilized only to facilitate describing the illustrative embodiments.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIGS. 1 through 3 show a first embodiment of a metallic wick according to the present invention shown in the drawings. The metallic wick 1 generally includes a mesh member 10 made of metal and rolled into a tubular shape and having a plurality of circles spaced from each other along a longitudinal axis A to form an Archimedean spiral cross-section perpendicular to the longitudinal axis A. The mesh member 10 includes first and second ends 11 and 12 disposed opposite to each other along the longitudinal axis A, and first and second surfaces 13 and 14 respectively extended from the first end 11 to the second end 12 thereof and arranged opposite to each other. Furthermore, the mesh member 10 essentially includes a plurality of metallic wires interlacing and overlapping each other to form into a plurality of meshes 15 penetrating the first and second surfaces 13 and 14 between the first and second ends 11 and 12 thereof. Each of the plurality of meshes 15 is formed in a quadrilateral shape, such as square or rhombus. Moreover, the mesh member 10 has the plurality of circles winding around the longitudinal axis A at a continuously increasing radial distance from the longitudinal axis A to form a transport channel 16 extending from the first end 11 to the second end 12 thereof along the longitudinal axis A. The transport channel 16 includes a central section 17 disposed adjacent to the longitudinal axis A and an annular section 18 connected with and winding around the central section 17. The first surface 13 of the innermost one of the plurality of circles is arranged around the longitudinal axis A to form the central section 17. The first and second surfaces 13 and 14 of the other circles face each other, except the innermost one is defined with the annular section 18. The first surface 13 of the outermost one of the plurality of circles is connected with and abutted against the second surface 14 of the other circle arranged adjacent to the outermost one.
FIGS. 4 and 5 show the metallic wick 1 cut into a predetermined length and mounted to a lamp device 2. The lamp device 2 includes a fuel tank 21 and a cap 22 removably and adaptably mounted on an open end of the fuel tank 21. The cap 22 has an essentially circular cross section and includes a bottom portion 221, a through hole 222 longitudinally extending through the bottom portion 221, an annular wall portion 223 formed around a periphery of the bottom portion 221, and an abutted portion 224 formed around a periphery of the through hole 222 and extending opposite to the bottom portion 221. The metallic wick 1 is inserted through the through hole 222 of the cap 22 and connects with fuel 23 stored in the fuel tank 21. The bottom portion 221 hinders the flame produced at the first end 11 to ignite fuel 23. A diameter of the through hole 222 is equal to or bigger than a diameter of the cross section of the metallic wick 1, causing the mesh member 10 to maintain its tubular shape. The annular wall portion 223 provides a windproof function. The abutted portion 224 abuts against the metallic wick 1 to maintain the metallic wick 1 in an upright position. Thus, fuel 23 is drawn from the second end 12 to the first end 11 of the metallic wick 1 via the transport channel 16 by capillary action between the plurality of meshes 15 and the central and annular sections 17 and 18 to reach the flame produced at the first end 11 and then vaporizes and combusts. Moreover, the size of each of the plurality of meshes 15 is unchanged or only has a very small deformation when the mesh member 10 is rolled into the plurality of circles, so that appearance factors of the metallic wicks 1, such as height and diameter are practically unchanged. Thus, the metallic wicks 1 can precisely adjust and maintain the flame scale during combustion. Furthermore, the number and size of transport channel 16 can be adjusted to transfer fuel 23 quickly for fuel igniting, even for high viscosity fuels.
FIGS. 6 through 11 show three metallic wicks 1 respectively cut into a predetermined length and mounted to another lamp device 2a. The lamp device 2a includes a fuel tank 21a and a cap 22a formed integrally as a single piece. The cap 22a has an essentially circular cross section and includes a bottom portion 221a and a through hole 222a longitudinally extending through the bottom portion 221a. A pull tab 23a is removably and adaptably connected to and closes the through hole 222a to avoid fuel 23 leaking out of the fuel tank 21a. The pull tab 23a has a ring 231a. A film 24a is removably connected to one end of the cap 22a and opposite to the bottom portion 221a. A user can hook his/her finger through the ring 231a and can remove the pull tab 23a from the through hole 222a, so that the through hole 222a is interconnected with an open end of the fuel tank 21a. 
The lamp device 2a further includes a supporting assembly 3 mounted on the cap 22a. The supporting assembly 3 includes a fixing member 31 and a shield member 32. The fixing member 31 is connected to the bottom portion 221a of the cap 22a and has a through bore 311 communicated with the through hole 222a of the cap 22a. The shield member 32 is mounted into the through bore 311 of the fixing member 31. The shield member 32 includes a bottom section 321, three connecting holes 322 longitudinally extending through the bottom section 321, and a wall section 323 formed around a periphery of the bottom section 321. The three connecting holes 322, the through hole 222a of the cap 22a, and the open end of the fuel tank 21a are interconnected to each other, and the three metallic wicks 1 are respectively inserted therethrough. Thus, fuel 23 is drawn from the second end 12 to the first end 11 of each of the three metallic wicks 1 via the transport channel 16 by capillary action between the plurality of meshes 15. The bottom section 321 hinders the flame produced at the first end 11 to ignite fuel 23. A diameter of each of the three connecting holes 322 is equal to or bigger than a diameter of the cross section of the metallic wick 1, maintaining the mesh member 10 in its tubular shape. The wall section 323 provides a windproof function.
FIGS. 12 through 14 show a second embodiment of the metallic wick. Specifically, the second embodiment of the metallic wick 1a includes a plurality of mesh members 10a respectively rolled into the plurality of different-sized tubes assembled and radially spaced from each other along a longitudinal axis A1 to form a concentric circular cross section perpendicular to the longitudinal axis A1. Each of the plurality of mesh members 10a includes with first and second ends 11a and 12a disposed opposite to each other along the longitudinal axis A1, and first and second surfaces 13a and 14a respectively extended from the first end 11a to the second end 12a thereof and arranged opposite to each other. Each of the plurality of mesh members 10a further includes two side edges 101a extending from the first end 11a to the second end 12a and connected with each other. Furthermore, each of the plurality of mesh members 10a essentially includes a plurality of metallic wires, interlacing and overlapping each other to form a plurality of meshes 15a penetrating between the first and second ends 11a and 12a thereof. Each of the plurality of meshes 15a is formed in a rhombus shape. Moreover, the plurality of mesh members 10a is radially spaced from each other to form a transport channel 16a extending from the first end 11a to the second end 12a thereof along the longitudinal axis A1. The transport channel 16a includes a central section 17a disposed adjacent to the longitudinal axis A1 and a plurality of annular sections 18a surrounding the central section 17a. The first surface 13a of the innermost one of the plurality of mesh members 10a is arranged around the longitudinal axis A1 to form the central section 17a. The first and second surfaces 13a and 14a of the other mesh members 10a face and are spaced from each other except the innermost one is defined with the annular sections 18a. 
FIGS. 15 through 17 show a third embodiment of the metallic wick. Specifically, the third embodiment of the metallic wick 1b includes a plurality of mesh members 10b spaced from each other and arranged in a longitudinal stacked array. Each of the plurality of mesh members 10b is formed in a flat shape and includes first and second ends 11b and 12b disposed opposite to each other, and first and second surfaces 13b and 14b respectively extended from the first end 11b to the second end 12b thereof and arranged opposite to each other. Furthermore, each of the plurality of mesh members 10b essentially includes a plurality of metallic wires interlacing and overlapping each other to form a plurality of meshes 15b penetrating between the first and second ends 11b and 12b thereof. Moreover, the plurality of mesh members 10b is spaced from each other to form a transport channel 16b extending from the first end 11b to the second end 12b thereof.
FIGS. 18 through 20 show a fourth embodiment of the metallic wick. Specifically, the fourth embodiment of the metallic wick 1c includes a mesh member 10c bent to form a stacked array. The mesh member 10c includes first and second ends 11c and 12c disposed opposite to each other, and first and second surfaces 13c and 14c respectively extended from the first end 11c to the second end 12c thereof and arranged opposite to each other. Furthermore, the mesh member 10c essentially includes a plurality of metallic wires interlacing and overlapping each other to form a plurality of meshes 15c penetrating between the first and second ends 11c and 12c thereof. Moreover, the mesh member 10c further includes a plurality of bending sections 19c, so that the plurality of bending sections 19c and first and second surfaces 13c and 14c thereof form a transport channel 16c. 
The metallic wick according to the present invention includes the following advantages:
1. The metallic wick 1; 1a; 1b; 1c is made of metal, so that it cannot be carbonized or consumed, to fix its shape and height thereof to maintain the flame combustion scale.
2. The metallic wick 1; 1a; 1b; 1c includes an end producing the flame thereon and heated by the flame to cause fuel drawn to the end thereof to be vaporized and combusted more completely due to a higher metal wick temperature.
3. The number of circles, the size of meshes 15; 15a; 15b; 15c, the surface roughness and the coating materials of the mesh member 10; 10a; 10b; 10c are adjustable to control the ability of capillary action adapted for wicking various fuels with different viscosity, so that the metallic wick 1; 1a; 1b; 1c can draw more viscous fuel faster to the tip thereof and can be ignited shortly (one minute or less) after dipping the metallic wick 1; 1a; 1b; 1c in fuel.
4. The metallic wick 1; 1a; 1b; 1c does not loosen at its terminal end after cutting a predetermined length or trimming to be mounted on the lamp device 2; 2a easily.
5. The metallic wick 1; 1a; 1b; 1c is made of metal reducing manufacturing costs to provide a popular price. In a preferred form, the metallic wick 1; 1a; 1b; 1c can be formed by a common metal wire mesh.
Thus since the illustrative embodiments disclosed herein may be embodied in other specific forms without departing from the spirit or general characteristics thereof, some of which forms have been indicated, the embodiments described herein are to be considered in all respects illustrative and not restrictive. The scope is to be indicated by the appended claims, rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein.

## Claims

1. A lamp device comprising:
a metallic wick including at least one mesh member made of metal and having a coating material, with the at least one mesh member having first and second ends disposed opposite to each other, first and second surfaces respectively extended from the first end to the second end thereof and arranged opposite to each other, a plurality of meshes penetrating the first and second surfaces between the first and second ends thereof, and a transport channel extending from the first end to the second end thereof;
a fuel tank adapted to store fuel; and
a cap connected to an open end of the fuel tank, wherein the cap includes a bottom portion, a through hole longitudinally extending through the bottom portion, an annular wall portion formed around a periphery of the bottom portion, and an abutted portion formed around a periphery of the through hole and extending away from the bottom portion, with the abutted portion abutting against the metallic wick;
wherein the metallic wick is inserted through the through hole of the cap and the second end contacts with fuel, with fuel to be drawn from the second end to the first end of the mesh member via the transport channel by capillary action to reach a flame produced at the first end of the mesh member, with the abutted portion extending away from the bottom portion towards but spaced from the second end, with the coating material controlling the capillary action for drawing the fuel with different viscosities.

2. The lamp device as claimed in claim 1, wherein the at least one mesh member is rolled into a tubular shape and has a plurality of circles spaced from each other along a longitudinal axis, with the plurality of circles wound around the longitudinal axis to form an Archimedean spiral cross-section perpendicular to the longitudinal axis at continuously increasing radial distance from the longitudinal axis to form the transport channel.

3. The lamp device as claimed in claim 2, wherein the transport channel includes a central section disposed adjacent to the longitudinal axis and an annular section connected with and winding around the central section.

4. The lamp device as claimed in claim 3, wherein the first surface of an outermost one of the plurality of circles is connected with and abutted against the second surface of the other circle arranged adjacent to the outermost one.

5. The lamp device as claimed in claim 2, wherein the at least one mesh member is a one-piece mesh member.

6. The lamp device as claimed in claim 1, wherein a supporting assembly is mounted on the cap and includes a fixing member and a shield member, with the fixing member connected to the bottom portion of the cap and having a through bore communicated with the through hole of the cap, with the shield member mounted into the through bore of the fixing member and including a bottom section, a connecting hole extending through the bottom section, and a wall section formed around a periphery of the bottom section, with the connecting hole, the through hole of the cap, and the open end of the fuel tank being interconnected to each other.

7. The lamp device as claimed in claim 1, wherein the abutted portion has a decreasing cross sectional size from the bottom portion towards the second end.

8. The lamp device as claimed in claim 7, wherein the fuel tank includes a closed end opposite to the open end, with the second end contacting the closed end.

9. The lamp device as claimed in claim 1, wherein the at least one mesh member is a one-piece mesh member bent to form a stacked array.

10. The lamp device as claimed in claim 1, wherein the at least one mesh member includes a plurality of mesh members spaced from each other to form the transport channel.