Filter element sealing mechanism
AssigneeHarvard Corporation
InventorsDennis R. Morgan, Edd D. Gryder
Life of this patent
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Abstract
The present invention typically involves the use of a compressed blocking area to assist in sealing a filter element and avoiding channeling in a wound fibrous tissue filtering system. It may involve the use of multiple, spaced, interstitial rings. It may involve the intentional wasting of a portion of the filter element to create a compressed blocking area. It may also involve the use of different heights of the rings and may include the use of compression and secondary tapers on the rings. The heights and spacing of the rings with respect to the other ring or rings may vary in a certain ratio.
Claims55
A pressurized axial flow fluid filter comprising:
- a. a fluid holding container with an inlet and an outlet;
- b. a filter element within said container comprising a filtering medium to filter an unfiltered fluid;
- c. a filtered flow path in said filter element;
- d. a blocking area to separate said filtered flow path from said unfiltered fluid in said container;
- and
- e. an interposed portion of said filtering medium between said blocking area and said unfiltered fluid.
A pressurized axial flow fluid filter comprising:
- a. a fluid holding container with an inlet and an outlet;
- b. an unfiltered flow path containing unfiltered fluid;
- c. a filter element within to said container comprising a filtering medium to filter said unfiltered fluid;
- d. a first interstitial ring which interstitially engages said filtering medium;
- e. a second interstitial ring which interstitially engages said filtering medium and is proximate to said first interstitial ring.
A pressurized axial flow fluid filter comprising:
- a. a fluid holding container into which an unfiltered fluid flows in a flow path wherein said container comprises an inlet and an outlet;
- b. a filter element within said container comprising a filtering medium;
- c. an uniform engaged area comprising an annular engagement of a uniform portion of said filtering medium, wherein said uniform engaged area comprises a blocking area;
- and
- d. a filtering area located on an opposite side of said uniform engaged area from said unfiltered fluid wherein said filtering area filters said unfiltered fluid to produce a filtered fluid which exits said container through said outlet.
A pressurized axial flow fluid filter comprising:
- a. a fluid holding container through which a fluid flows in a flow path wherein said container comprises an inlet and an outlet;
- b. a filter element within said container comprising a filtering medium to filter said fluid;
- c. a first interstitial ring which engages said filtering medium and comprises a first axial height;
- and
- d. a second interstitial ring which engages said filtering medium and comprises a second axial height which is different from said first axial height.
A pressurized axial flow fluid filter comprising:
- a. a fluid holding container through which a fluid flows wherein said container comprises an inlet and an outlet;
- b. a filtering flow path through which said fluid is filtered;
- and
- c. a filter assembly fluidicly connected to said filtering flow path comprising:
- i. a substantially parallel filtering medium with respect to said filtering flow path to filter said fluid;
- ii. a restrictor element substantially transverse to said filtering flow path and fluidicly connected to said substantially parallel filtering medium;
- and
- iii. at least one lip to engage said substantially parallel filtering medium and block said fluid flow from flowing around at least one edge of said restrictor element.
Dependencies are inferred from the claim text.