Internal-combustion engines – Miscellaneous – Fuels – lubricants and additives
Reexamination Certificate
2000-05-22
2001-11-27
Argenbright, Tony M. (Department: 3747)
Internal-combustion engines
Miscellaneous
Fuels, lubricants and additives
C123S19800E
Reexamination Certificate
active
06321692
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a fuel additive dispenser for use with the fuel delivery system of an engine.
Reducing fuel consumption is an important factor in many commercial ventures, such as in the commercial truck market and the operation of a combustion engine powered machinery. One method of doing so is to add a fuel agent, fuel treatment,fuel additive or fuel conditioner to the main fuel supply source for the engine. Adding such liquids to an existing main fuel source of combustible liquids can be done in a variety of ways. Whatever, the apparatus or method used it is very desirable that the resulting mixture be uniformly mixed, have the additive properly measured and be nonelectrically operated to avoid any possible safety consequences when used with combustible or burnable fuels.
Different types of methods and inventions have been employed to dispense a given amount of an additive into a fuel reservoir. Manually, one may simply discharge the contents of a container into the existing fuel inlet for the fuel tank. Another method of dispensing a metered quantity of fuel stores the fluid under pressure in a container normally open to a metering chamber. Valve means are located between the storage container and a measuring chamber and an associated discharge outlet provides for the positive ejection of the fluid. An additive injection system for diesel engines uses a fuel pump to supply fuel to the engine with a fuel tank to supply fuel to the pump and to a fuel additive tank.
Another prior art fuel additive delivery system uses a fuel additive reservoir with an electrically operated pump for positively displacing a measured amount of the additive to the fuel supply. A register means may be employed to register the amount of fuel replenished to the engine fuel supply and to transmit an electrical signal proportional to the amount of the fuel added. This electrical signal is used to permit the electrical operation of a pulse pump to dispense a required amount of the additive or agent to insure a uniform concentration of the agent throughout the fuel supply. Still another delivery system uses an additive tank with an on-board computation unit to determine the quantity of additive to be delivered. Using piston pulsed atomization, the additive is delivered to the fuel tank by the number of piston strokes.
DESCRIPTION OF THE PRIOR ART
Delivery systems that add an agent or additive to a fuel system are known. For example, in the U.S. Pat. No. 3,620,424 to Grigsby a metered quantity of fuel is stored in a fluid under pressure in a container normally open to a metering chamber. Valve means are located between the storage container and a measuring chamber and an associated discharge outlet provides for the positive ejection of the fluid.
U.S. Pat. No. 4,161,160 to Hicks et al. uses an additive injection system for diesel engines with a fuel pump to supply fuel to the engine and a fuel tank to supply fuel to the pump and to a fuel additive tank.
U.S. Pat. No. 4,621,593 to Rao et al. discloses a fuel additive delivery system that uses a fuel additive reservoir with an electrically operated pump for positively displacing a measured amount of the additive to the fuel supply. A register means may be employed to register the amount of fuel replenished to the engine fuel supply and to transmit an electrical signal proportional to the amount of the fuel added. This electrical signal is used permit the electrical operation of a pulse pump to dispense a required amount of the additive or agent to insure a uniform concentration of the agent throughout the fuel supply.
U.S. Pat. No. 5,421,295 to Lemaire et al. discloses a delivery system that uses an additive tank with an on-board computation unit to determine the quantity of additive to be delivered. Using piston pulsed atomization, the additive is delivered to the fuel tank by the number of piston strokes.
In the present invention is a fuel additive system that is nonelectrically operated to homogeneously add an additive to an existing fuel system and which can be retrofitted on the fuel tank opening all as will be detailed in the specification that follows hereafter.
SUMMARY OF THE INVENTION
This invention relates to a fuel additive system used to add fuel to an existing fuel system of an engine.
It is the primary object of the present invention to provide for the improved fuel additive system.
Another object is to provide for such a system using a pressure reduction housing before the fuel reservoir that has a feed line from the additive reservoir with an additive metering device interposed before the fuel reservoir.
REFERENCES:
patent: 3620424 (1971-11-01), Grigsby
patent: 4161160 (1979-07-01), Hicks et al.
patent: 4621593 (1986-11-01), Rao et al.
patent: 5421295 (1995-06-01), Lemaire et al.
Argenbright Tony M.
Harris Katrina B.
McGlynn Joseph H.
Patent & Trademark Services
Zack Thomas
LandOfFree
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