Vapor-separating fuel system utilizing evaporation chamber
OwnerJoseph S. Adamsinventor
Life of this patent
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Abstract
An evaporation chamber controlled by a pressure drop across an intake valve is used in conjunction with a regulator to supply fuel such as propane in its gaseous state regardless of the chamber's orientation to a portioning fuel injection system for portable engines such as can be used for gas-powered fastening tools.
Claims30
An evaporation chamber system for use with an engine for a gas-powered tool to convert liquefied petroleum gas fuel (LPG) to its vaporous state for delivery to the engine, the system having an evaporation chamber with a pressure-biasing valve at an inlet end to communicate with a source of LPG and a regulator valve situated at a location remote from the pressure-biasing valve through which fuel from the evaporation chamber is passed towards a combustion chamber of the engine, the pressure-biasing valve being arranged to deliver a charge of LPG to the evaporation chamber for evaporation into a gaseous state at a lower pressure than that existing at the source of LPG, and the regulator valve being arranged to deliver at least a portion of the charge in gaseous form towards the combustion chamber at a lower pressure than that existing in the evaporation chamber, wherein the pressure-biasing valve at the inlet end of the evaporation chamber is biased toward a closed position for restricting passage of LPG into the evaporation chamber and is responsive to differential pressure between the source of LPG and the evaporation chamber so that at a predetermined lower pressure in the evaporation chamber than that existing at the source of LPG, the pressure-biasing valve is opened to admit LPG into the evaporation chamber.
An evaporation chamber system for use with an engine for a gas-powered tool to convert liquefied petroleum gas fuel (LPG) to its vaporous state for delivery to the engine, the system having an evaporation chamber with a pressure-biasing valve at an inlet end to communicate with a source of LPG and a regulator valve situated at a location remote from the pressure-biasing valve through which fuel from the evaporation chamber is passed towards a combustion chamber of the engine, the pressure-biasing valve being arranged to deliver a charge of LPG to the evaporation chamber for evaporation into a gaseous state at a lower pressure than that existing at the source of LPG, and the regulator valve being arranged to deliver at least a portion of the charge in gaseous form towards the combustion chamber at a lower pressure than that existing in the evaporation chamber, wherein the regulator valve has an inlet port positioned and extending into a central region of the evaporation chamber system above any liquid levels normally found in the evaporation chamber, regardless of the orientation of the evaporation chamber system.
An evaporation chamber system for use with an engine for a gas-powered tool to convert liquefied petroleum gas fuel (LPG) to its vaporous state for delivery to the engine, the system having an evaporation chamber with a pressure-biasing valve at an inlet end to communicate with a source of LPG and a regulator valve situated at a location remote from the pressure-biasing valve through which fuel from the evaporation chamber is passed towards a combustion chamber of the engine, the pressure-biasing valve being arranged to deliver a charge of. LPG to the evaporation chamber for evaporation into a gaseous state at a lower pressure than that existing at the source of LPG, and the regulator valve being arranged to deliver at least a portion of the charge in gaseous form towards the combustion chamber at a lower pressure than that existing in the evaporation chamber, wherein the pressure-biasing valve is in the form of an intake check valve, and wherein the intake check valve is associated with a fuel canister which is removably mounted on the evaporation chamber to permit replacement of the canister when empty.
An evaporation chamber system for use with an engine for a gas-powered tool to convert liquefied petroleum gas fuel (LPG) to its vaporous state for delivery to the engine, the system having an evaporation chamber with a pressure-biasing valve at an inlet end to communicate with a source of LPG and a regulator valve situated at a location remote from the pressure-biasing valve through which fuel from the evaporation chamber is passed towards a combustion chamber of the engine, the pressure-biasing valve being arranged to deliver a charge of LPG to the evaporation chamber for evaporation into a gaseous state at a lower pressure than that existing at the source of LPG, the regulator valve being arranged to deliver at least a portion of the charge in gaseous form towards the combustion chamber at a lower pressure than that existing in the evaporation chamber, the evaporation chamber system and a portion system being arranged to receive gaseous fuel from the regulator valve and selectively receive and dump or otherwise meter a predetermined amount of that fuel to a fuel injector check valve for delivery to the engine for combustion.
An evaporation chamber system for use with a gas-powered engine to convert a liquefied fuel to its vapor state comprising:
- an evaporation chamber that converts the liquefied fuel from a liquid state to a gaseous state at a pressure substantially above ambient atmospheric pressure;
- an inlet that connects the evaporation chamber to a pressurized supply of the liquefied fuel through an intake valve for reducing pressure of the liquefied fuel entering the evaporation chamber;
- and
- a regulator valve that outputs the fuel from the evaporation chamber in a gaseous state at a further reduced pressure for supplying the gas-powered engine with fuel,
- wherein the intake valve is biased toward a closed position for restricting passage of liquefied fuel into the evaporation chamber and is responsive to differential pressure between the pressurized supply of liquefied fuel and the evaporation chamber so that at a predetermined lower pressure in the evaporation chamber than that existing at the pressurized supply of liquefied fuel, the intake valve is opened to admit liquefied fuel into the evaporation chamber.
An evaporation chamber system for use with a gas-powered engine to convert a liquefied fuel to its vapor state comprising:
- an evaporation chamber that converts the liquefied fuel from a liquid state to a gaseous state at a pressure substantially above ambient atmospheric pressure;
- an inlet that connects the chamber to a pressurized supply of the liquefied fuel through an intake valve for reducing pressure of the liquefied fuel entering the evaporation chamber;
- a regulator valve that outputs the fuel from the evaporation chamber in a gaseous state at a further reduced pressure for supplying the gas-powered engine with fuel,
- wherein the regulator valve has an inlet port that extends within the evaporation chamber to prevent the fuel in a liquid state from entering the regulator valve;
- and
- the inlet port of the regulator valve being at least partially centered within the evaporation chamber so that the inlet port is located above any liquid fuel levels normally found in the evaporation chamber, regardless of the orientation of the evaporation chamber.
An evaporation chamber system for use with a gas-powered engine to convert a liquefied fuel to its vapor state comprising:
- an evaporation chamber that converts the liquefied fuel from a liquid state to a gaseous state at a pressure substantially above ambient atmospheric pressure;
- an inlet that connects the evaporation chamber to a pressurized supply of the liquefied fuel through an intake valve for reducing pressure of the liquefied fuel entering the evaporation chamber;
- and
- a regulator valve that outputs the fuel from the evaporation chamber in a gaseous state at a further reduced pressure for supplying the gas-powered engine with fuel,
- the intake valve being removably mounted within the evaporation chamber inlet,
- wherein the intake valve includes an adapter body and the evaporation chamber inlet includes a fitting for receiving the adapter body of the intake valve.
A method of converting a liquefied fuel into its vapor state for a gas-powered engine comprising steps of:
- supplying a liquefied fuel from a pressurized source;
- conveying the liquefied fuel from the pressurized source to an evaporation chamber through a first pressure reducer;
- converting the liquefied fuel from a liquid state to a gaseous state within the evaporation chamber at a pressure substantially above ambient atmospheric pressure;
- and
- conveying the gaseous-state fuel from the evaporation chamber towards a combustion chamber of the engine through a second pressure reducer,
- wherein the step of conveying the liquefied fuel from the pressurized source to the evaporation chamber through the first pressure reducer includes (a) biasing the first pressure reducer toward a closed position for restricting passage of liquefied fuel into the evaporation chamber and (b) overcoming the biasing of the first pressure reducer with a differential pressure between the pressurized source and the evaporation chamber so that at a predetermined lower pressure in the evaporation chamber than that existing at the pressurized source, the first pressure reducer is opened to admit liquefied fuel into the evaporation chamber.
A method of converting a liquefied fuel into its vapor state for a gas-powered engine comprising steps of:
- supplying a liquefied fuel from a pressurized source;
- conveying the liquefied fuel from the pressurized source to an evaporation chamber through a first pressure reducer;
- converting the liquefied fuel from a liquid state to a gaseous state within the evaporation chamber at a pressure substantially above ambient atmospheric pressure;
- conveying the gaseous-state fuel from the evaporation chamber towards a combustion chamber of the engine through a second pressure reducer,
- wherein the step of conveying the gaseous-state fuel from the evaporation chamber includes directing the gaseous-state fuel though a port positioned within the evaporation chamber to prevent the fuel in a liquid state from reaching the combustion chamber;
- and
- the port being at least partially centered within the evaporation chamber so that the port is located above any liquid fuel levels normally found in the evaporation chamber, regardless of the orientation of the evaporation chamber.
Dependencies are inferred from the claim text.