GB2110947A

GB2110947A - Basket strainer

Info

Publication number: GB2110947A
Application number: GB08226370A
Authority: GB
Inventors: Raymond William Ruckel
Original assignee: Filter Specialists Inc
Current assignee: Pall Filter Specialists Inc
Priority date: 1981-12-10
Filing date: 1982-09-16
Publication date: 1983-06-29
Also published as: GB2110947B; NL8204343A; CA1211721A; FR2517983A1; DE3237984A1

Abstract

A strainer for filtering liquids comprises a housing having an inlet port 22 and an outlet port 24. A removable filtering element 28 is located within the housing and has a flange 32 which is supported on the upper edge of a tubular pipe section 26, whose interior communicates with outlet 24. The element is clamped in place by arched strip 33 engaging the housing cover 20. <IMAGE>

Description

SPECIFICATION Basket strainer This invention relates to a strainer for filtering liquids and provides for a removable filtering element.

The strainer includes a housing having side and bottom walls and a top opening which receives the filtering element. Inlet and outlet ports serve to maintain liquid communication through the housing. One of the ports includes an upturned section within the housing. A removable cover spans the top opening of the housing. The filtering element includes a reticulated body having an open upper end which contacts the upper end of the upturned port section to place the filtering element in a liquid flow path between the inlet and outlet ports whereby liquid entering the housing will flow through the filtering element and out of the housing through the outlet port.

The strainer may be cleaned by removing the cover from the top opening of the housing and lifting the filtering element out of the housing. The filtering element preferably includes a narrow strip of material which spans the open upper end of the element.

The strip serves as a handle for lifting the filtering element from the housing and is constructed to contact the cover to retain the filter body upper end in contact with the upper end of the upturned port section.

The following is a specific description intended to illustrate the invention by way of example only, reference being made to the accompanying drawings in which: Figure 1 is a side view of the filter assembly; Figure 2 is a fragmentary top view of the filter assembly with a portion of the cover cut away for purposes of illustration; Figure 3 is a cross-sectional view taken along line 3-3 of Figure 2; and Figure 4 is a cross-sectional view of the filter assembly housing, similar to that shown in Figure 3 but with the cover removed and the filtering element raised for purposes of illustration.

The strainer shown generally at 10 in the drawings, includes a housing 12 defined by a side wall 14 and a bottom wall 16. A removable cover 20 spans a top opening 18 in the housing. Cover 20 is fastened to housing 12 with hold-down bolts 13 and nuts 15.

Housing 12 includes an inlet port 22 through which, in use, liquid enters the housing, and an outlet port 24 through which, in use, filtered liquid exits. Each port 22,24 includes a mounting flange 23 for connection to external piping (not shown). The housing includes an upright cylindrical section 26 which is in sealing contact at its bottom edge with housing bottom wall 16. Up-turned portion 26 includes an inwardly projecting annular lip 38 at its upper end. Lip 38 can have an annular groove 40 formed in its upper surface. An O-ring seal 42 is fitted within groove 40. Outlet port 24 extends through housing side wall 14 and is connected into cylindrical section 26 near its lower end.

A filtering element shown generally at 28 is seated within housing 12 and includes a reticulated, generally rigid basket-like body 29 having an essentially circular opening 30 in its upper end defined by an out-turned lip 32. Filtering element 28 is suspended within housing cylindrical section 26, lip 32 being supported upon lip 38 of the cylindrical section 26 with the side and bottom of its body 29 preferably spaced from the cylindrical section, as best seen from Figures 3 and 4. An arched strip 33 of flexible shape-retaining material spans the opening 30 of filtering element body 29 and is attached at its ends tolip32.

In the embodiment shown, with lip 32 resting upon lip 38 to suspend filtering element body 29 within the cylindrical section 26 of the housing, strip 33 of the filtering element will contact cover 20 when the cover spans housing opening 18. The pressure of cover 20 against strip 33 maintains contact between filtering element 28 and housing cylindrical section 26.

The liquid to be filtered in use enters housing 12 through inlet port 22, fills the space 45 between cylindrical portion 26 and housing side wall 14 and flows into filtering element 28 at its open end 30. The liquid then flows out of housing 12 through reticulated filtering element body 29, cylindrical portion 26, and connected outlet port 24. The direction of flow is represented in Figure 3 by arrows 44.

To change or clean the filtering element 28, cover 20 is removed by removing hold-down nuts 15 from bolts 13. Filtering element 28 is then pulled upwardly to the position shown in Figure 4, by grasping strip 33 and lifting away from housing 12, the filtered or strained material remaining within filtering element body 29. In some operations, it may be desirable to use a flexible filter bag within filtering element body 29.

As will be appreciated from the foregoing description with reference to the drawings, the invention provides a strainer for liquids, having a removable filtering element within a filter housing, the strainer in particular having an up-turned internal port section which at its upper end contacts the open upper end of a filtering element in such a manner that the filtering element may easily and quickly be lifted from within the filter housing for cleaning or replacement.

1. A liquid strainer comprising a housing having side and bottom walls and a top opening spaced from said bottom wall, a removable cover spanning said top opening, first and second ports in said housing, an up-turned section disposed within said housing and terminating in an open upper end in liquid communication with one of said ports, a removable filtering element disposed within said housing, said filtering element including a reticulated body having an open upper end contacting said up-turned section upper end, said filtering element body upper end being spaced from and below sections of said cover with said filtering element body being placed in a liquid flow path between said ports whereby liquid entering said housing through one of said ports flows through the body to filter the liquid and exits the housing

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Basket strainer This invention relates to a strainer for filtering liquids and provides for a removable filtering element. The strainer includes a housing having side and bottom walls and a top opening which receives the filtering element. Inlet and outlet ports serve to maintain liquid communication through the housing. One of the ports includes an upturned section within the housing. A removable cover spans the top opening of the housing. The filtering element includes a reticulated body having an open upper end which contacts the upper end of the upturned port section to place the filtering element in a liquid flow path between the inlet and outlet ports whereby liquid entering the housing will flow through the filtering element and out of the housing through the outlet port. The strainer may be cleaned by removing the cover from the top opening of the housing and lifting the filtering element out of the housing. The filtering element preferably includes a narrow strip of material which spans the open upper end of the element. The strip serves as a handle for lifting the filtering element from the housing and is constructed to contact the cover to retain the filter body upper end in contact with the upper end of the upturned port section. The following is a specific description intended to illustrate the invention by way of example only, reference being made to the accompanying drawings in which: Figure 1 is a side view of the filter assembly; Figure 2 is a fragmentary top view of the filter assembly with a portion of the cover cut away for purposes of illustration; Figure 3 is a cross-sectional view taken along line 3-3 of Figure 2; and Figure 4 is a cross-sectional view of the filter assembly housing, similar to that shown in Figure 3 but with the cover removed and the filtering element raised for purposes of illustration. The strainer shown generally at 10 in the drawings, includes a housing 12 defined by a side wall 14 and a bottom wall 16. A removable cover 20 spans a top opening 18 in the housing. Cover 20 is fastened to housing 12 with hold-down bolts 13 and nuts 15. Housing 12 includes an inlet port 22 through which, in use, liquid enters the housing, and an outlet port 24 through which, in use, filtered liquid exits. Each port 22,24 includes a mounting flange 23 for connection to external piping (not shown). The housing includes an upright cylindrical section 26 which is in sealing contact at its bottom edge with housing bottom wall 16. Up-turned portion 26 includes an inwardly projecting annular lip 38 at its upper end. Lip 38 can have an annular groove 40 formed in its upper surface. An O-ring seal 42 is fitted within groove 40. Outlet port 24 extends through housing side wall 14 and is connected into cylindrical section 26 near its lower end. A filtering element shown generally at 28 is seated within housing 12 and includes a reticulated, generally rigid basket-like body 29 having an essentially circular opening 30 in its upper end defined by an out-turned lip 32. Filtering element 28 is suspended within housing cylindrical section 26, lip 32 being supported upon lip 38 of the cylindrical section 26 with the side and bottom of its body 29 preferably spaced from the cylindrical section, as best seen from Figures 3 and 4. An arched strip 33 of flexible shape-retaining material spans the opening 30 of filtering element body 29 and is attached at its ends tolip32. In the embodiment shown, with lip 32 resting upon lip 38 to suspend filtering element body 29 within the cylindrical section 26 of the housing, strip 33 of the filtering element will contact cover 20 when the cover spans housing opening 18. The pressure of cover 20 against strip 33 maintains contact between filtering element 28 and housing cylindrical section 26. The liquid to be filtered in use enters housing 12 through inlet port 22, fills the space 45 between cylindrical portion 26 and housing side wall 14 and flows into filtering element 28 at its open end 30. The liquid then flows out of housing 12 through reticulated filtering element body 29, cylindrical portion 26, and connected outlet port 24. The direction of flow is represented in Figure 3 by arrows 44. To change or clean the filtering element 28, cover 20 is removed by removing hold-down nuts 15 from bolts 13. Filtering element 28 is then pulled upwardly to the position shown in Figure 4, by grasping strip 33 and lifting away from housing 12, the filtered or strained material remaining within filtering element body 29. In some operations, it may be desirable to use a flexible filter bag within filtering element body 29. As will be appreciated from the foregoing description with reference to the drawings, the invention provides a strainer for liquids, having a removable filtering element within a filter housing, the strainer in particular having an up-turned internal port section which at its upper end contacts the open upper end of a filtering element in such a manner that the filtering element may easily and quickly be lifted from within the filter housing for cleaning or replacement. CLAIMS

1. A liquid strainer comprising a housing having side and bottom walls and a top opening spaced from said bottom wall, a removable cover spanning said top opening, first and second ports in said housing, an up-turned section disposed within said housing and terminating in an open upper end in liquid communication with one of said ports, a removable filtering element disposed within said housing, said filtering element including a reticulated body having an open upper end contacting said up-turned section upper end, said filtering element body upper end being spaced from and below sections of said cover with said filtering element body being placed in a liquid flow path between said ports whereby liquid entering said housing through one of said ports flows through the body to filter the liquid and exits the housing through the other of said ports.

2. A liquid strainer as claimed in Claim 1 wherein said filtering element body includes a lip adjacent its upper end, said lip contacting said up-turned section upper end.

3. A liquid strainer as claimed in Claim 1 or Claim 2 wherein said filtering element includes an arched strip spanning said filtering element body upper end and contacting said cover when the cover spans said housing top opening, to retain said filtering element lip in contact with said up-turned section upper end.

4. A liquid strainer as claimed in Claim 2 wherein said filtering element lip contacts said up-turned section upper end to suspend said filtering element within said housing with said filter element body spaced from said housing side and bottom walls.

5. A strainer for use in removing entrained solids from a liquid medium which strainer comprises an open-topped housing having an inlet port and an outlet port connected by a liquid flow path, a cover removably disposed as a closure for said open top, a member disposed within said housing and defining an open-topped filtering chamber opening into one of said ports and a filtering element which comprises a reticulated filter body defining a cavity which communicates through an open top thereof with said flow path and supported within said chamber from its upper end by a support surface at the upper open end of the chamber-defining member, said filtering element obstructing said flow path and upper extremities of said filtering element being spaced from and below said cover.

6. A liquid strainer substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawings.