Mineral oils: processes and products – Products and compositions – Fuels
Reexamination Certificate
1999-09-28
2001-02-27
Howard, Jacqueline V. (Department: 1764)
Mineral oils: processes and products
Products and compositions
Fuels
C585S006000, C585S014000, C048S1970FM, C048S1990FM
Reexamination Certificate
active
06193874
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to fuel gas, and more particularly a high combustion efficiency fuel gas, which, when mixed with oxygen, can be quickly burned to produce high temperature flame for use in welding.
In welding, inflammable gas is mixed with oxygen in a mixing chamber in the torch, and then the fuel fixture is burned with a high temperature flame at the tip of the torch for melting metal. Acetylene is most commonly used inflammable gas in welding. However, acetylene may explore if it is not properly handled. Further, during the production of acetylene, much calcium carbide and electric energy are consumed. In recent years, LPG (liquefied petroleum gas) has been intensively used in welding instead of acetylene due to the advantage of low cost, fine cutting surface, easy removal of oxidized iron chips, etc. However, LPG is still not safe in use because it cannot be maintained in the liquefied state under the atmospheric pressure. LPG may explore if it is not properly handled. Because LPG is a dangerous fuel, special equipment and facilities must be used to store LPG, or to deliver LPG from place to place or to end-users.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide a high efficient fuel gas, which can be quickly burned with a high temperature of flame for melting metal. It is another object of the present invention to provide a high combustion efficiency fuel gas, which is safe in use. It is still another object of the present invention to provide a high combustion efficiency fuel gas, which is inexpensive to obtain. According to the present invention, petroleum is drawn from a gas cylinder, and delivered to a light oil in an oil tank, so that a saturated inflammable gas is obtained from an outlet at the oil tank. The initial boiling point of the light oil is within 1°~110° C. The inflammable high combustion fuel gas thus obtained has the advantages of the conventional petroleum gas and acetylene.
REFERENCES:
patent: 3925033 (1975-12-01), Mayo
patent: 4640675 (1987-02-01), Green et al.
patent: 4643666 (1987-02-01), Green et al.
patent: 1243148A (2000-02-01), None
Howard Jacqueline V.
Rosenberg , Klein & Lee
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