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.

1 . A stove, comprising: 
 a burner for providing combustion;    a fuel canister, the fuel canister including liquid fuel and pressurized gas therein;    a fuel conduit extending between the burner and the fuel canister; and    a fuel tip within the fuel canister and being in fluid communication with the pressurized gas, the liquid fuel, and the fuel conduit, the fuel tip being arranged and configured to automatically provide a first mixture of the liquid fuel and the pressurized gas through the fuel conduit to the burner responsive to back pressure in the fuel conduit exceeding a particular pressure, and to automatically provide a second mixture of the liquid fuel and the pressurized gas through the fuel conduit to the burner responsive to back pressure in the fuel conduit not exceeding the particular pressure, the first mixture having a leaner fuel mixture than the second mixture.    
   
   
       2 . The stove of  claim 1 , comprising at least two burners.  
   
   
       3 . The stove of  claim 1 , wherein the pressurized gas is pressurized air.  
   
   
       4 . The stove of  claim 1 , wherein the fuel tip comprises a device for adjusting fuel flow into the fuel tip, the device being configured so that more fuel flows into the fuel tip when the back pressure in the fuel line exceeds the particular pressure.  
   
   
       5 . The stove of  claim 1 , wherein the fuel tip comprises a piston, the piston being arranged such that movement of the piston between first and second positions reduces fuel flow into the fuel tip.  
   
   
       6 . The stove of  claim 5 , wherein the pressurized gas is in fluid communication with one side of the piston and biases the piston toward the second position.  
   
   
       7 . The stove of  claim 6 , wherein the fuel line is in fluid communication with an opposite side of the piston such that back pressure in the fuel line biases the piston toward the first position.  
   
   
       8 . The stove of  claim 7 , further comprising a spring for biasing the piston towards the first position.  
   
   
       9 . The stove of  claim 1 , wherein the particular pressure is variable depending upon the pressure of the pressurized gas.  
   
   
       10 . The stove of  claim 1 , wherein the burner comprises: 
 a burner top; and    a burner bottom having a trough therein for capturing excess fuel during starting of the burner.    
   
   
       11 . The stove of  claim 10 , further comprising: 
 a fuel entry from through the burner bottom; and    an downturned lip on the burner top surrounding the fuel entry, the downturned lip being arranged to direct fuel that enters through the fuel entry and engages the burner top to flow along the downturned lip toward the trough.    
   
   
       12 . The stove of  claim 1 , further comprising: 
 a structure that is capable of capturing excess fuel in the fuel line between the fuel canister and the burner.    
   
   
       13 . The stove of  claim 12 , wherein the structure comprises an enclosed structure.  
   
   
       14 . The stove of  claim 13 , wherein the structure comprises an enclosed pan spaced from the bottom of the burner.  
   
   
       15 . The stove of  claim 14 , wherein the enclosed pan is heated by a flame in the burner.  
   
   
       16 . The stove of  claim 15 , wherein heating of the enclosed pan by the flame comprises conduction between the enclosed pan and the burner.  
   
   
       17 . A stove, comprising: 
 a burner for providing combustion, the burner comprising: 
 a burner top;  
 a burner bottom having a trough therein for capturing excess fuel during starting of the burner.  
   a fuel canister, the fuel canister including liquid fuel and pressurized gas therein; and    a fuel conduit extending between the burner and the fuel canister.    
   
   
       18 . The stove of  claim 17 , further comprising: 
 a fuel entry from the fuel conduit through the burner bottom; and    a downturned lip on the burner top surrounding the fuel entry, the downturned lip being arranged to direct fuel that enters through the fuel entry and engages the burner top to flow along the downturned lip toward the trough.    
   
   
       19 . A stove, comprising: 
 a burner for providing combustion;    a fuel canister, the fuel canister including liquid fuel and pressurized gas therein;    a fuel conduit extending between the burner and the fuel canister; and    an enclosed pan spaced from the bottom of the burner that is capable of capturing excess fuel in the fuel line between the fuel canister and the burner.    
   
   
       20 . The stove of  claim 19 , wherein the enclosed pan is heated by a flame in the burner.  
   
   
       21 . The stove of  claim 19 , wherein heating of the enclosed pan by the flame comprises conduction between the enclosed pan and the burner.