EP0034416A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Backflushable fluid filter
Assignee: Brunswick Corp
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Filing: 1981-01-23
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Granted: —
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Expires: 2001-01-23
Abstract
Abstract This invention comprehends a new and unique means for preventing the crowns (forward projections of the pleats) of a backflushable filter element from splitting due to the cyclic aciton that is experienced during cleaning and backflushing. In one embodiment, a plurality of spacers, preferably wedge shape, is positioned between the outwardly projecting pleats of the filter media thereby preventing the splitting thereof. A plurality of spacers may also be placed between the inwardly projecting pleats to provide additional support during the cleaning and backflushing cycle. In another embodiment a ring is placed adjacent the inwardly directed pleats and the inner end cap lip; this also prevents splitting of the crowns when the filter element is subjected to the cyclic action of cleaning and backflushing.
Inventors
- 👤 John I Schaeffer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 23:24
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/62; B01D29/66; B01D2201/00; B01D2201/04; B01D2201/0407; B01D2201/12; B01D2201/127
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
76 words
L. A fluid filter element comprising: (a) a pair of spaced end caps; (b) a pleated filter media extending between the end caps and secured thereto, the pleats having an inner surface and an outer surface and a plurality of inwardly directed apexes on the inner surface and a plurality of outwardly directed crowns on the outer surface; (c) means for preventing the splitting of the crowns positioned between the apexes and the inside cap surface.
Claim 2
Dependent Claim
17 words
The element of claim 1 wherein each end cap has a stepped configuration at the inside surface.
Claim 3
Dependent Claim
17 words
The element of claim 2 wherein a gap is located between the stepped configuration and the apexes.
Claim 4
Dependent Claim
18 words
The element of claim 2 wherein the preventing means is mounted between the stepped configuration and the apexes.
Claim 5
Dependent Claim
15 words
.5. The element of claims 1-3 or 4 wherein the preventing means comprises a ring.
Claim 6
Dependent Claim
25 words
The element of claims 1-3 or 4 wherein the preventing means comprises a ring mounted between each inside cap surface and the apexes adjacent thereto.
Claim 7
Dependent Claim
12 words
The element of claims 5 or 6 wherein the ring is metal.
Claim 8
Dependent Claim
18 words
The element of claim 7 wherein the ring is tack welded to the cap at its inner surface.
Claim 9
Dependent Claim
10 words
The element of claim 7 wherein the ring is hollow.
Claim 10
Dependent Claim
28 words
The element of claim 5 wherein the ring substantially inhibits the diaphragmic movement of the pleats when a fluid is forced through the media in a cyclic fashion.
Claim 11
Dependent Claim
67 words
A fluid filter element comprising: (a) a pair of spaced end caps; (b) a pleated filter media extending between the end caps and secured thereto, the media having a plurality of outer pleats spaced apart with outwardly projecting crowns; (c) first spacer means mounted inbetween the outer pleats for preventing the diaphragmic movement of the pleats when fluid is forced through the media in a cyclic fashion.
Claim 12
Dependent Claim
21 words
The element of claim 11 wherein the media further includes a plurality of inner pleats spaced apart with inwardly projecting apexes.
Claim 13
Dependent Claim
22 words
The element of claim 12 further including second spacer means mounted inbetween the inner pleats for preventing diaphragmic movement of the pleats.
Claim 14
Dependent Claim
23 words
The element of claim 13 wherein the first and second spacer means cooperatively operate to substantially inhibit any movement of the pleated media.
Claim 15
Dependent Claim
15 words
The element of claims 11 or 13 wherein the first spacer means comprises first spacers.
Claim 16
Dependent Claim
13 words
l6. The element of claim 15 wherein the first spacers are wedge shaped.
Claim 17
Dependent Claim
13 words
The element of claim 16 wherein the wedges are mounted between adjacent pleats.
Claim 18
Dependent Claim
26 words
The element of claim 17 wherein the wedges are wider at the outer surface near the crowns and narrower toward the inner surface adjacent the apexes.
Claim 19
Dependent Claim
15 words
The element of claims 13 or l8 wherein the second spacer means comprises second spacers.
Claim 20
Dependent Claim
18 words
The element of claim 19 wherein the spacers have a plurality of elongated teeth and open spaces therebetween.
Claim 21
Dependent Claim
15 words
The element of claim 20 wherein the spacers have three teeth and two open spaces.
Claim 22
Dependent Claim
10 words
The element of claim 20 wherein the spacers are E-shaped.
Claim 23
Dependent Claim
15 words
The element of claim 20 wherein the spacers have five teeth and four open spaces.
Claim 24
Dependent Claim
15 words
The element of claim 20 wherein the spacers have seven teeth and six open spaces.
Claim 25
Dependent Claim
14 words
. The element of claim 24 wherein the teeth are about 0.09 inches apart.
Claim 26
Dependent Claim
12 words
The element of claim 25 wherein the spacers have a flat configuration.
Claim 27
Dependent Claim
11 words
The element of claim 25 wherein the spacers are wedge shaped.
Claim 28
Dependent Claim
16 words
The element of claims 1 or 11 wherein the filter media is a porous metal material.
Claim 29
Dependent Claim
17 words
The element of claim 28 wherein the porous metal material is a sintered web of metal fibres.
Claim 30
Dependent Claim
20 words
The element-of claim 29 wherein the metal fibres have a size range from about 1 micron to about 50 microns.
Claim 31
Dependent Claim
16 words
The element of claim 29 wherein the web has a density range from 10% to 40%.
Claim 32
Dependent Claim
19 words
The element of claim 28 further including a porous-metal layer adjacent the outer surface of the porous metal material.
Claim 33
Dependent Claim
22 words
The element of claim 28 or 32 further including a porous metal layer adjacent the inner surface of the porous metal material.
Claim 34
Dependent Claim
13 words
The element of claims 32 or 33 wherein the layer is expanded metal.
Claim 35
Dependent Claim
13 words
The element of claims 32 or 33 wherein the layer is wire screen.
Claim 36
Dependent Claim
22 words
The element of claims 11 or 20 further including a porous metal layer adjacent the inner surface of the porous metal material.
Claim 37
Dependent Claim
23 words
. The element of claims 11 or 20 further including a porous metal layer adjacent the inner surface of the porous metal material.
Claim 38
Dependent Claim
20 words
The element of claims 36 or 37 wherein the layers provide fluid paths inbetween the spacers and pleated filter material.
Claim 39
Dependent Claim
10 words
The element of claim 38 wherein the spacers are corrugated.
Claim 40
Dependent Claim
13 words
The element of claim 39 wherein the corrugations are about 1/8 inch apart.
References Cited (Backward Citations)
No citation records indexed.
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