Spacer and filter assembly utilizing the spacer
An end cap of a filter element has canted fins in an annular space between a filter element and filter housing for imparting a rotary motion to a fluid prior to the fluid passing through the filter element. The end cap includes a plurality of axially extending legs upstream of the fins, which legs engage a nutplate. Spaces between the legs provide an inlet allowing dirty fluid to flow to the outside surfaces of the filter element. The fins remove large particles from the fluid by centrifugal force so that large particles do not add to the contaminant load in the filter elements.
1. A spacer element for use with a filter having a cylindrical canister in which is disposed a filter element having an annular filter media for filtering a fluid, wherein the canister is closed by an end plate arrangement, the spacer element comprising:
a disk having a central opening therethrough for receiving a stand pipe of a filter mounting base;
an imperforate, annular, peripheral flange axially extending from a first side of the disk and having an array of radially projecting fins formed on an outer surface of the flange and which said fins are axially canted thereon and configured to impart a spiral motion to the fluid prior to the fluid being filtered, and
a plurality of legs defining axially extending spaces therebetween, the legs extending axially from a second side of the disk and engaging the end plate arrangement in order to keep the filter element in spaced relation thereto, whereby the fluid flows through the spaces between the legs, over the fins, through the filter element and out of the stand pipe received in the opening through the disk.
2. The spacer element of claim 1 wherein the axially extending peripheral flange defines a cylindrical space for receiving the filter media of the filter element.
3. A filter element including the spacer element of claim 2 wherein the spacer element encloses the end of the annular filter media with the disk closing the end of the filter media wherein the spacer element functions as an end cap.
4. The spacer element of claim 1 wherein the spacer element includes an annular seal disposed at the central opening of the disk for sealing with the stand pipe.
5. The spacer element of claim 4 wherein the annular seal has a radially facing sealing surface for sealing with the standpipe.
6. The spacer element of claim 1 wherein the spacer element is made of a resinous material.
7. An end cap for use with an annular filter media to form a filter element for mounting in a cylindrical housing to provide a filter element for filtering a fluid, wherein the canister is closed by an end plate assembly, the end cap comprising:
a disk having a central opening therethrough for receiving a stand pipe, the disk closing an end of the filter media;
an imperforate, annular, peripheral flange extending axially from a first side of the disk and having an array of radially projecting fins formed on an outer surface of the flange and which said fins are axially canted thereon and configured to impart a spiral motion to the fluid prior to the fluid being filtered, the axially extending peripheral flange cooperating with the disk to provide a pocket for receiving the end of the annular filter media, and
a plurality of legs defining axially extending spaces therebetween, the legs extending axially from a second side of the disk and engaging the end plate assembly in order to keep the filter element in spaced relation thereto, whereby the fluid flows through the spaces between the spaced legs, over the fins, through the filter media and out of the stand pipe received in the opening through the disk.
8. The end cap of claim 7 wherein the end cap includes an annular seal disposed at the central opening of the disk for sealing with the stand pipe.
9. The end cap can of claim 8 wherein the annular seal has a radially facing sealing surface for sealing with the stand pipe.
10. The end cap of claim 7 wherein the end cap is made of a resinous material.
11. The filter assembly of claim 10 wherein the end plate assembly comprises a nutplate and an end plate welded to the nutplate, the end plate being attached directly to the housing and the nutplate having threads for threading onto the filter mounting base and being engaged by the legs of the spacer.
12. A filter assembly for filtering a liquid, the filter assembly comprising:
a cylindrical filter media;
a cylindrical housing having an annular wall defining a cylindrical space, a closed end and an open end;
an end plate assembly for partially closing the open end and for defining an opening for receiving a portion of a filter mounting base;
at least a first annular filter element disposed in the housing and supported by the end plate assembly, the first annular filter element having an end cap comprising:
a disk having a central opening therethrough for receiving a stand pipe of a filter mounting base;
an imperforate, annular, peripheral flange extending axially from a first side of the disk and having an array of radially projecting fins formed on an outer surface of the flange and which said fins are axially canted thereon and configured to impart a spiral motion to the liquid being filtered, the axially extending peripheral flange defining a pocket for receiving the cylindrical filter media, and
a plurality of legs defining axially extending spaces therebetween, the legs extending axially from a second side of the disk and engaging the end plate arrangement in order to keep the filter element in spaced relation thereto, whereby the liquid flows through the spaces between the legs, over the fins, through the filter element and out of the stand pipe received in the opening through the disk.
13. The filter assembly of claim 12 further including a second filter element within the housing axially aligned with the first filter element, the first and second filter elements having hollow cores coupled by a spiral flow inducing element.
14. The filter assembly of claim 12 further including a sealing element disposed in the central opening of the disk for the sealing with the standpipe of the filter mounting base.
15. The filter assembly of claim 14 wherein the sealing element has a radially facing sealing surface for sealing with the standpipe.