Method of fluid filtering employing a novel cartridge 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.
Claims51
A method of filtering a fluid comprising the steps of:
- a. accepting a flow of unfiltered fluid into a container;
- b. flowing said unfiltered fluid in an unfiltered flow path in said container;
- c. blocking said flow of unfiltered fluid in a blocking area through action on a filtering medium;
- d. filtering said unfiltered fluid to produce a filtered fluid in a filtering area of said filtering medium wherein said filtering occurs on an opposite side of said blocking area from said unfiltered fluid;
- e. interposing at least a portion of said filtering medium between said blocking area and said unfiltered fluid;
- and
- f. allowing said filtered fluid to pass out of said container.
A method of filtering a fluid comprising the steps of:
- a. accepting a flow of unfiltered fluid into a container;
- b. flowing said unfilter ed fluid in an unfiltered flow path in said container;
- c. blocking said flow of unfiltered fluid in a blocking area through action of a filtering medium;
- d. filtering said unfiltered fluid to produce a filtered fluid in a filtering area of said filtering medium wherein said filtering occurs on an opposite side of said blocking area from said unfiltered fluid;
- e. interposing at least a portion of said filtering medium between said blocking area and said unfiltered fluid;
- and
- f. allowing said filtered fluid to pass out of said container.
A method of filtering a fluid comprising the steps of:
- a. accepting a flow of unfiltered fluid into a container containing a filtering medium;
- b. flowing said unfiltered fluid in an unfiltered flow path in said container;
- c. engaging a first interstitial ring to said filtering medium;
- c. engaging a second interstitial ring proximate to said first interstitial ring;
- d. interposing at least a portion of said filtering medium between said first and second interstitial rings and said unfiltered fluid;
- e. filtering said fluid in said filtering medium to produce a filtered fluid wherein said filtering occurs on an opposite side of each of said first and second interstitial rings from said unfiltered fluid;
- and
- f. allowing said filtered fluid to pass out of said container.
A method of filtering a fluid comprising the steps of:
- a. accepting a flow of unfiltered fluid into a container;
- b. flowing said unfiltered fluid in an unfiltered flow path in said container and into a filtering medium;
- c. assuring the annular engagement of a uniform area of said filtering medium in a uniform engaged area;
- d. filtering said unfiltered fluid in said filtering medium to produce a filtered fluid wherein said filtering occurs on an opposite side of said uniform engaged area from said unfiltered fluid;
- and
- e. allowing said filtered fluid to pass out of said container.
A method of filtering a fluid comprising the steps of:
- a. accepting a flow of unfiltered fluid into a container;
- b. flowing said unfiltered fluid in an unfiltered flow path in said container;
- c. engaging a filtering medium with a first interstitial ring having a first axial height and located in said container;
- d. engaging said filtering medium with a second interstitial ring having a second axial height which is different from said first axial height;
- e. filtering said unfiltered fluid in said filtering medium to produce a filtered fluid;
- and
- f. allowing said filtered fluid to pass out of said container.
A method of filtering a fluid comprising the steps of:
- a. accepting an unfiltered fluid into a container;
- b. flowing said unfiltered fluid in an unfiltered flow path in said container;
- c. forcing flow through a filtering medium substantially parallel to a filtering flow to produce a filtered fluid;
- d. forcing flow through a restrictor element substantially transverse to said filtering flow;
- e. blocking said flow from flowing around at least one edge of said restrictor element;
- and
- f. allowing said filtered fluid to pass out of said container.
Dependencies are inferred from the claim text.