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US 9,174,160 B2Granted
Collapsible core, filter, and method
AssigneeBaldwin Filters, Inc.
InventorSteven J. Merritt
Life of this patent
Estimating the term…
Abstract
A collapsible winding core for a filter element is provided. A fluted filter media is wound about the collapsible winding core having a cylindrical shape. Subsequently, the collapsible winding core is collapsed into a generally flat shape to from the filter element having a racetrack shape.
Claims3
A method of forming a filter element comprising:
- providing a collapsible winding core;
- winding a fluted filter media about the collapsible winding core to form an intermediate filter element;
- collapsing the intermediate filter element;
- wherein the filter element is formed having an inlet face and an outlet face after said collapsing wherein fluid flowing from the inlet face to the outlet face must pass through the fluted filter media and thereby be filtered, the collapsible winding core being disposed between the inlet face and the outlet face;
- sealing the collapsible winding core to prevent any bypassing of unfiltered fluid through the collapsible winding core in the finished filter element for fluid flow between the inlet face and the outlet face;
- applying sealant to an outside surface of the collapsible winding core and allowing the sealant to seep through the collapsible winding core to an inner surface thereof to provide said sealing of the collapsible winding core;
- and
- providing perforations in the collapsible winding core and allowing sealant to seep through said perforations.
5 more elements
A method of forming a filter element comprising:
- providing a collapsible winding core;
- winding a fluted filter media about the collapsible winding core to form an intermediate filter element;
- collapsing the intermediate filter element;
- wherein the filter element is formed having an inlet face and an outlet face after said collapsing wherein fluid flowing from the inlet face to the outlet face must pass through the fluted filter media and thereby be filtered, the collapsible winding core being disposed between the inlet face and the outlet face;
- sealing the collapsible winding core to prevent any bypassing of unfiltered fluid through the collapsible winding core in the finished filter element for fluid flow between the inlet face and the outlet face;
- and
- applying a strip of sealant along an inner surface of the collapsible winding core prior to collapsing, wherein collapsing the intermediate filter element causes strip of sealant to seal the inner surface to provide said sealing the collapsible winding core.
4 more elements
Dependencies are inferred from the claim text.