Oil filter element of wound cotton /paper composition
AssigneeHepo Filters, Inc.
InventorsLe Roy J. Meddock, Mark T. Meddock
Life of this patent
Estimating the term…
Abstract
A filter element comprising a core having a hollow interior, a perforated outer surface, in fluid communication with the hollow interior, an open first end in fluid communication with the hollow interior, and a closed second end. The filter element comprises alternating layers of flat sheet filter material and lengths of cotton/cellulose composition yarn in a plurality of layers over the outer surface of the core, each layer adapted to filter a different size of contaminants, as well as trapping any paper and cotton particles breaking free from the yarn.
Claims23
A method of filtering oil, comprising:
- providing a filter element in a canister having an inlet and an outlet, the filter element having an elongated hollow core with a perforated outer surface;
- said filter element comprising a plurality of alternate layers of flat sheet filter material and yarn;
- said flat sheet filter material wrapped in one or more turns over the outer surface of the core;
- said yarn wound over the outer surface of the flat sheet filter material, such that at least one inward one of the layers disposed near the core has a first winding pattern adapted to filter particles down to a first size and at least one of the layers, disposed radially further out from the core than the at least one inward one of the layers, has a different second winding pattern adapted to filter particles down to a second size that is larger than the first size;
- introducing the oil into the inlet of the canister under pressure so that the oil passes radially from an outer circumference of the filter element and through the plurality of layers of the filter element into the hollow core, to thereby trap different size particulate matter at different layers of the filter element;
- and discharging the oil from the hollow core out of the outlet of the canister.
A filter element, comprising:
- a core having a hollow interior, a perforated outer surface in fluid communication with the hollow interior, an open first end in fluid communication with the hollow interior, and a closed second end;
- a plurality of alternate layers of flat sheet filter material and yarn;
- said flat sheet filter material wrapped in one or more turns over the outer surface of the core;
- said yarn being wound over the outer surface of said flat sheet filter material, such that at least one inward one of the layers disposed near the core is adapted to filter particles down to a first size and at least one of the layers, disposed radially further out from the core than the at least one inward one of the layers, is adapted to filter particles down to a second size that is larger than the first size.
A method of fabricating a filter element for filtering oil, comprising:
- providing a core with a hollow interior and a perforated outer surface in fluid communication with the hollow interior;
- wrapping flat sheet filter material in one or more turns over the outer surface of the core;
- winding a length of yarn comprised of cotton and cellulose paper over the outer surface of the flat sheet filter material in an irregular winding pattern;
- wrapping alternating flat sheet filter material and winding yarn in a plurality of additional layers;
- such that at least one inward layer of flat sheet filter material and one inward layer of yarn near the core is adapted to filter particles down to a first size and at least one layer of fiat sheet filter material and one layer of yarn, radially further out from the core than the inward layers, is adapted to filter particles down to a second size that is larger than the first size.
Dependencies are inferred from the claim text.