| Liquid fuel backpacking stove -> Monitor Keywords |
|
|
  Liquid fuel backpacking stoveUSPTO Application #: 20070087297Title: Liquid fuel backpacking stove Abstract: A stove (20) having a burner bottom (34) with an integrated trough (46) for catching fuel. The trough (46) may be formed, for example, by a section that is captured between a raised center (44) of the burner bottom (34) and a raised outer annular rim (42) of the burner bottom. A burner top (36) for the stove (20) includes a plate (38) that directs fuel contacting the burner top down into the trough (46) in the burner bottom (34). This plate (38) may be, for example, a plate having a downward-turned outer annular lip (39) that extends toward the trough (46). A fuel tip (50) is provided that extends down into a liquid fuel tank (26) for the stove (20). The fuel tip (50) includes a piston (58) that is moveable to provide a lean fuel, air-fuel mixture upon start of the stove, and a rich fuel, air-fuel mixture after the stove is started. (end of abstract) Agent: Leydig, Voit & Mayer, Ltd. (seattle Office) - Chicago, IL, US Inventor: Norris Richard Long USPTO Applicaton #: 20070087297 - Class: 431247000 (USPTO) Related Patent Categories: Combustion, Heated Line Section Feeds Flame Holder, Fuel Conduit Within Flame Or Combustion Products Zone The Patent Description & Claims data below is from USPTO Patent Application 20070087297. Brief Patent Description - Full Patent Description - Patent Application Claims
REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of U.S. provisional application Ser. No. 60/727,517, filed Oct. 17, 2005, and U.S. provisional application Ser. No. 60/762,615, filed Jan. 27, 2006, both of which are incorporated herein by reference. TECHNICAL FIELD OF THE INVENTION [0002] The present invention relates to liquid fuel burner appliances, and more specifically to backpacking and camping stoves. BACKGROUND OF THE INVENTION [0003] Liquid fuel camp stoves and lanterns for camping and outdoor use are well known and are described, for example, in U.S. Pat. No. 3,876,364, which is owned by The Coleman Company, Inc., assignee of the present invention. Liquid fuel which is used in such camp stoves and lanterns may be, for example, COLEMAN brand fuel, white gas, unleaded gasoline, or other liquid fuels. [0004] In conventional liquid fuel camp stoves such as the ones which The Coleman Company, Inc. has offered for many years, fuel is contained in a pressure vessel or fuel tank into which air is pumped under pressure. As described in U.S. Pat. No. 3,876,364, the fuel tank is equipped with a dip tube which extends to nearly the bottom of the tank. The dip tube is closed at the bottom with the exception of a small diameter orifice through which fuel is allowed to enter. The dip tube has an internal conduit which is open at the bottom and which communicates with the upper part of the pressure vessel above the maximum intended fuel level. The dip tube orifice can be partly blocked by insertion of a needle which is suitably connected to the fuel control system. The needle partly blocks the orifice during the lighting cycle and is removed to leave the orifice unblocked during the normal burn cycle. This partial blockage during the lighting cycle causes air to be drawn down the space between the internal and outer conduits of the dip tube from an opening at the upper part of the pressure vessel. As this air accompanies fuel up the internal conduit, a fuel-lean mixture of fuel and air is created to enhance lighting. A fuel-lean mixture is needed at initial lighting, because the fuel in the mixture is not vaporized and thus must be mixed with a lot of air for combustion. The air-fuel mixture then passes to a generator which is connected to the dip tube by the fuel control system. The generator is a metal tube which passes above the burner of the stove into a venturi assembly which is connected to the burner. The generator is heated by the flame of the burner when the burner is operating. Fuel is discharged at high velocity from an orifice or jet at the end of the generator into the venturi where air is aspirated and mixed and fed to the burner with the air/fuel mixture as a combustible mixture for burning. [0005] After the burner has been operating for an initial period and the generator is sufficiently heated, the fuel that travels through the generator is vaporized. As such, after the generator is heated, the fuel expands and may be supplied in a less lean mixture. At this point, the needle may be removed from blocking of the passage. [0006] In U.S. Pat. No. 3,876,364, the restricting needle is operated by rotating a fuel control knob. In other appliances, a lever is used to adjust the appliance for starting and running. The lever is moved up to start and then down to run. [0007] The foregoing structure for allowing liquid fuel appliances to be lighted when the generator is cold is referred to as an "instant lighting system." Liquid fuel appliances which do not include an instant lighting system require some other means for heating the generator during start-up, for example, liquid priming fuel, or heating paste. In either event, the lighting process is difficult for a user. Often, a user will forget to switch the needle (e.g., by moving the lever) after the lighting process. If liquid priming fuel is used, then the process can often take a minute or more, and results in blackening of the bottom of the stove. SUMMARY OF THE INVENTION [0008] The following presents a simplified summary of some embodiments of the invention in order to provide a basic understanding of the invention. This summary is not an extensive overview of the invention. It is not intended to identify key/critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some embodiments of the invention in a simplified form as a prelude to the more detailed description that is presented later. [0009] In accordance with an embodiment, a stove is provided having a burner bottom with an integrated trough for catching fuel during a burner lighting stage. The trough may be formed, for example, by a section that is captured between a raised center of the burner bottom and a raised outer annular rim of the burner bottom. [0010] In accordance with another embodiment, a burner top for the stove includes a plate that directs fuel contacting the burner top down into the trough in the burner bottom. This plate may be, for example, a plate having a downward-turned outer annular lip that extends toward the trough. [0011] In accordance with another embodiment, a fuel tip is provided that extends down into a liquid fuel tank for the stove. The fuel tip includes a piston that is moveable to provide a lean air to fuel mixture upon start of the stove, and a less lean air to fuel mixture after the stove is started. [0012] In accordance with another embodiment, a stove is provided that includes an enclosed pan spaced from a burner. A tube or other conduit extends between the enclosed pan and the burner. A generator feeds into the enclosed pan. A venturi tube may be connected between the closed pan and the generator. The closed pan serves as a reservoir for fuel at a starting of the stove. The pan is heated by the generator so that fuel evaporates and is burned at the burner. [0013] Other features of the invention will become apparent from the following detailed description when taken in conjunction with the drawings, in which: BRIEF DESCRIPTION OF THE DRAWINGS [0014] FIG. 1 is a side perspective view of a stove in accordance with an embodiment of the invention; [0015] FIG. 2 is an exploded side perspective view of a burner assembly for the stove in FIG. 1; [0016] FIG. 3 is a side perspective view of a burner bottom for the burner assembly in FIG. 2; [0017] FIG. 4 is a sectional view of the burner assembly of FIG. 2; [0018] FIG. 5 is top view of a fuel tip and air inlet tube for use with the stove of FIG. 1 in accordance with an embodiment; [0019] FIG. 6 is an exploded side perspective view of the fuel tip of FIG. 5; Continue reading... Full patent description for Liquid fuel backpacking stove Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Liquid fuel backpacking stove 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. Start now! - Receive info on patent apps like Liquid fuel backpacking stove or other areas of interest. ### Previous Patent Application: Gas supply device and apparatus for processing a substrate Next Patent Application: Aqua lighting system Industry Class: Combustion ### FreshPatents.com Support Thank you for viewing the Liquid fuel backpacking stove patent info. IP-related news and info Results in 0.60213 seconds Other interesting Feshpatents.com categories: Computers: Graphics , I/O , Processors , Dyn. Storage , Static Storage , Printers |
||
