Compositions, apparatus and methods useful for releasing solid lubricating oil additive
AssigneeAtlantic Richfield Company
InventorJames M. DeJovine
Life of this patent
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Abstract
Improved internal combustion engine lubrication is obtained by the controlled rate of release of certain solid particles into circulating lubricating oil. Compositions are set forth comprising such solid particles combined with solid thermoplastic polymer having a controlled rate of dissolution in the lubricating oil. Also included are methods and apparatus wherein such solid particles are added to the engine lubricating oil, for example, which involve the filtering system for such oils.
Claims5
A method for at least maintaining the lubricating quality of a circulating lubricating oil composition in an internal combustion engine having a filter means comprising contacting at least a portion of said circulating oil with a material selected from the group consisting of (1) a solid thermoplastic polymer having a controlled rate of dissolution in said oil composition, said polymer having solid particles effective to at least maintain the lubricating quality of said oil composition, (2) a liquid suspension containing such solid particles and mixtures thereof, thereby adding solid particles to said circulating lubricating oil composition, said solid particles being sized sufficiently small to substantially avoid being removed from the lubricating oil composition by said filter means used to remove solid contaminants from the composition, and being of graphite.
Dependencies are inferred from the claim text.