Filter with axially and rotatably movable wiper
AssigneeDelaware Capital Formation, Inc.
InventorsJohn D. Vander Ark, Jr., Danny K. Kaiser
Life of this patent
Estimating the term…
Abstract
A self-cleaning pressure filter system comprises a housing having an unfiltered liquid inlet and a filtered liquid outlet, a filter element of substantially constant cross section having an interior communicating with the unfiltered liquid inlet and an exterior communicating with the filtered liquid outlet for filtering solids from the liquid and wherein filtered out solids are left in the interior of the filtered element. A cleaning unit is simultaneously moved both axially and rotatively along the interior of the filter element and carries at least one cleaning blade movable in a spiral path along the interior face of the filter element for removing solids accumulated thereon.
Claims18
A self-cleaning pressure filter system comprising:
- a housing having an unfiltered liquid inlet and a filtered liquid outlet;
- a filter element of generally cylindrical shape with open ends and defining an axis and an interior face, said filter element having an interior communicating with said unfiltered liquid inlet and an exterior communicating with said filtered liquid outlet and configured to filter solids from the liquid and wherein filtered out solids are left in the interior of said filter element;
- a screw extending coaxially through said filter element and fixed with respect to said filter element;
- a rotor coaxially rotatable with respect to said screw and filter element;
- a cleaning unit disposed in said filter element interior for cleaning of filtered out solids from said interior face of said filter element, said cleaning unit having an axis coaxial with said filter element axis, said cleaning unit including an axially mounted nut means threadedly coupled to said screw to facilitate reciprocal movement of said cleaning unit through said filter element;
- motor means fixed with respect to said housing for rotating said rotor;
- means on said cleaning unit coupling said cleaning unit to said rotor for rotating said cleaning unit with said rotor so as to threadedly axially advance said cleaning unit along said screw;
- and
- means for reversing axial movement of said cleaning unit along said screw after said cleaning unit reaches a preselected location on said screw.
A self-cleaning pressure filter system comprising:
- a housing having an unfiltered liquid inlet and a filtered liquid outlet;
- a filter element of of generally cylindrical shape with open ends and an interior face and defining a center axis, said filter element having an interior defined by said interior face communicating with said unfiltered liquid inlet and an exterior communicating with said filtered liquid outlet and configured to filter solids from the liquid and wherein filtered out solids are left in the interior of said filter element;
- a cleaning assembly for cleaning said filter element, said cleaning assembly including:
- a support member mounted in said filter element interior;
- at least one blade carrier mounted to said support member;
- a cleaning blade fitted in said blade carrier and positioned to be oriented directly outwardly relative to said support member;
- a biasing member positioned against said blade carrier for urging said blade carrier outwardly so that said cleaning blade is urged against said filter element interior wall;
- and drive means for axially moving said support member through said filter element while simultaneously rotating said support member so that said cleaning blade travels along a helical path around said interior face of said filter member, wherein said support member includes an eccentrically located hole relative to the filter element axis and said drive means for rotating and axially moving said support member includes a rotating member extending axially through said eccentric hole and rotatable within said filter element for rotating said support member.
Dependencies are inferred from the claim text.