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  Tube burner flame hole constructionUSPTO Application #: 20060088796Title: Tube burner flame hole construction Abstract: A tube burner flame hole construction with both sides of the tube provided with a row of multiple flame hole walls; each wall being compressed in a shape of a lip with both sides slightly protruding outwardly from the tube; a hole being provided in the center of the recessed lip to facilitate the punching process and improve structural strength of the of the entire tube burner, flame hole being more sturdy and thicker for consistent burning effects and longer service life of the tube burner. (end of abstract) Agent: Leong C Lei - Walnut Creek, CA, US Inventor: William Home USPTO Applicaton #: 20060088796 - Class: 431350000 (USPTO) Related Patent Categories: Combustion, Flame Holder Having Protective Flame Enclosing Or Flame Stabilizing Structure The Patent Description & Claims data below is from USPTO Patent Application 20060088796. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] (a) Technical Field of the Invention [0002] The present invention is related to an improved construction of flame holes on a tube burner, and more particularly to one that provides walls housing those flame holes improved structural strength, consistent burning effects and longer service life of a burner generally used for a mantelshelf in a restaurant. [0003] (b) Description of the Prior Art [0004] The oven used in a mantelshelf in a restaurant is usually different from that of a domestic one, and the structure of the burner in the mantelshelf is also drastically different from a domestic burner. So far, the commercial burner is usually made in an "T" or a "U" shape. The tube burner is adapted with an inlet of fuel gas connected to a source such as a gas cylinder. All other openings are sealed either by press or welding. Both sides of the tube are disposed with multiple minute flame holes in a row so that when the fuel gas is admitted, the fuel gas ejected out of those holes is immediately ignited to heat the oven or to directly heat a cooking utensil as desired. [0005] However, the opening of those holes on the wall of the tube one by one either with a drill or a chisel involves numerous processes, particularly with a U shape tube burner. As illustrated in FIG. 1, all the holes must be chiseled or drilled before bending the tube into a U shape. Those holes are vulnerable to break up during the bending process of the tube; and in worse case, those holes on the outer wall of the tube are deformed when pulled laterally and others on the inner wall are also deformed when laterally compressed resulting in inconsistent burning capacity. To correct this problem, another process is required after the bending of the tube. The space for the process however is limited to the tube spacing on the inner side making the process of the tube burner of the prior art minute and complicated, thus higher production cost to fail fast production. Furthermore, the thickness of the tube naturally determines the service life of the tube wall housing the flame hole. Usually, the thicker tube gives longer service life for the tube wall. However, the thickness of the tube is limited to a certain range to permit punch process. Thicker tube means heavier tube burner to frustrate the idea of having the punched instead of cast production with thin metal tube for easier handling of the tube burner. The thin tube burner has its flame holes preset ex-factory to a limited length of flame for longer service life of the burner at the expense of shortened heating efficiency. As a result, the fire is weak and not consistent for being subject to the air currents nearby, and that burner certainly is not meeting the fast cooking as demanded in a restaurant SUMMARY OF THE INVENTION [0006] The primary purpose of the present invention is to provide an improved construction of a thin burner wall that houses the flame hole to simplify the process of the thin tube burner. To achieve the purpose, at where the flame holes to be provided on both sides of the tube are compressed to form multiple walls each in the form of a thick lip and a flame hole punched at the same time through the wall at the recessed lip tip at an angle practically vertical to the tip of the lip. [0007] Another purpose of the present invention is to provide an improved construction of a thin burner wall that allows one punching process to come up with all flame holes even the tube is bent into a U shape while maintaining the tube in an integral part. [0008] Yet another purpose of the present invention is to provide an improved construction of a thin burner wall. The mass density of the wall punched in a lip shape is increased with the thick wall lip preset at a critical arc before the punched mark is formed, thus to increase the mass density of the wall at the tip of the wall lip where the hole is punched through the tube. Given with the same thickness of the tube, the thickness of the wall of the flame hole of the present invention can be two times of that of the prior art so to provide solid and sturdy wall among those multiple flame holes to prevent from being tom up by the punching force or the fuel ejection pressure. It is also free of folding marks to prevent from being subject to sheath damage. Accordingly, given with the same weight of the tube burner, the present invention provides stronger fire and higher consistent burning efficiency than the prior art does without being interfered by air currents to meet the demands of fast cooking in a restaurant. [0009] The foregoing object and summary provide only a brief introduction to the present invention. To fullly appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts. [0010] Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example. BRIEF DESCRIPTION OF THE DRAWINGS [0011] FIG. 1 is a schematic view of a U shape thin tube burner of the prior art. [0012] FIG. 2 is a magnified view of Part A taken from FIG. 1. [0013] FIG. 3 is a perspective view of a preferred embodiment of the present invention. [0014] FIG. 4 is a magnified view of Part B of the preferred embodiment of the present invention taken from FIG. 3. [0015] FIG. 5 is a bird's view of the preferred embodiment of the present invention taken from FIG. 3. [0016] FIG. 6 is a front view of the preferred embodiment of the present invention taken from FIG. 3. [0017] FIG. 7 is a side view of the preferred embodiment of the present invention taken from FIG. 3. [0018] FIG. 8 is a sectional view taken from VII-VII in FIG. 3. [0019] FIG. 9 is a perspective view of another preferred embodiment of the present invention. [0020] FIG. 10 is a sectional view taken from X-X in FIG. 9. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Continue reading... Full patent description for Tube burner flame hole construction Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Tube burner flame hole construction 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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