Mineral oils: processes and products – Refining – Purifying used oil
Reexamination Certificate
1998-05-15
2001-09-11
Griffin, Walter D. (Department: 1764)
Mineral oils: processes and products
Refining
Purifying used oil
C208S184000, C208S187000, C210S167150, C210S180000, C422S198000, C422S199000, C196S046000, C196S098000, C196S132000, C159S044000
Reexamination Certificate
active
06287455
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a device and method for treating oil used to lubricate an internal combustion engine, particularly for the removal of fluids as distinguished from particulate contaminants from oil. The oil purifier does not include a particulate filter which would increase the bulk of the purifier.
SUMMARY OF THE INVENTION
In the present invention, particulate contaminants are removed from oil by means of a filter (not shown) prior to the oil entering the purifier.
The oil purifier comprises a housing, an exposed horizontal heating wand located within a heating chamber, a cascading evaporator to increase the rate of evaporation of vaporizable impurities, and a vented domed cover to direct vaporized impurities outside the device. In use, the contaminated oil enters an inlet chamber and is channeled upwards through a flow regulator into the heating chamber. Oil is heated by the exposed horizontal heating wand. Impurities in the oil are vaporized, and consequently, fumes rise upwards towards the domed cover, pass through the vent in the cover and out of the purifier, while heated oil flows over a top lip of the heating chamber and flows downward over the ridges of the evaporator to cascade and increase the rate of evaporation of impurities from the heated oil.
Accordingly, an object of the present invention is to provide a highly efficient oil purifier for removing vaporizable impurities from oil used to lubricate an internal combustion engine or used to purify the oil in a hydraulic system.
Another object of this invention is to provide a highly efficient purifier having an evaporation chamber for removing vaporizable contaminants from lubricating oils and hydraulic oils.
Another object of this invention is to provide an evaporation chamber in an oil purifier which enables the flow of oil being treated to be regulated or controlled.
A still further object of this invention is to provide an oil purifier without a particulate filter included within the housing, but that contains a completely integrated heating element consisting of a fully exposed, horizontal heating wand that contributes a uniformity in heating and oil flow with respect to oil within the heating chamber.
It is still a further object of this invention to provide an oil purifier without a particulate filter included within the housing of the purifier so that vaporization of volatile contaminants can be accomplished separately from particulate removal.
A still further object of this invention is to provide a method and device for purifying oil used to lubricate an internal combustion engine wherein virtually all oil is exposed to a substantially uniform evaporation system.
REFERENCES:
patent: 4093548 (1978-06-01), Sterkenburg et al.
patent: 4146475 (1979-03-01), Forsland
patent: 4272371 (1981-06-01), Moses et al.
patent: 4295966 (1981-10-01), LeBlanc et al.
patent: 4443334 (1984-04-01), Shugarman et al.
patent: 4830745 (1989-05-01), Van Der Meulen
patent: 4968410 (1990-11-01), Johnson, Sr.
patent: 5630956 (1997-05-01), Lynch
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