Patent US5032272A successfully refreshed from Google Patents.
US5032272A
Expired / Lapsed
US
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Filter frame with a dual channel guide strip
Assignee: BTR PLC
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Filing: 1989-06-29
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Granted: 1991-07-16
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Expires: 2009-06-29
Abstract
Abstract For use in internally supporting a filter element of the fabric, bag-shape type there is provided a support frame having a border at least a part of which is defined by a single guide strip typically substantially W-shaped in cross-section and which presents two guide channels to face inwards of the frame for the spaced apart support of two mesh layers. A single deformed length of the guide strip may be used to form a base and two side portions of a rectangular shaped support frame.
Inventors
- 👤 Christopher J. Mould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:55
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/06; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
109 words
A filter element support frame of generally rectangular shape having a border defined at least in part by two side portions interconnected by a base portion and each of said portions consisting essentially of a single guidestrip which presents two guide channels which face inwards of the support frame to provide two inward facing guide channels for the spaced apart support of respective edges of two mesh layers against movement toward one another, said inward facing guide channels being spaced apart by material of the strip which defines an outward facing channel said guide channels having free edges which are bent over upon themselves to form a smooth edge.
Claim 2
Dependent Claim
109 words
A filter element support frame of generally rectangular shape having a border defined at least in part by two side portions interconnected by a base portion and each of said portions consisting essentially of a single guidestrip which presents two guide channels which face inwards of the support frame to provide two inward facing guide channels for the spaced apart support of respective edges of two mesh layers against movement toward one another, said inward facing guide channels being spaced apart by material of the strip which defines an outward facing channel said guide channels having free edges which are bent over upon themselves to form a smooth edge.
Claim 3
Dependent Claim
30 words
A support frame according to claim 1 wherein said free edges have been formed by rolling over edges of a deformable strip during its shaping to form the guide channels.
Claim 4
Dependent Claim
17 words
A support frame according to claim 2 wherein said rolled over edges lie within the guide channels.
Claim 5
Dependent Claim
14 words
A support frame according to claim 1 wherein the outward facing channel is open.
Claim 6
Dependent Claim
15 words
A support frame according to claim 4 wherein the outward facing channel has parallel sides.
Claim 7
Dependent Claim
36 words
A support frame according to claim 1 wherein a single length of said single guide strip has been bent locally to form corner regions between said base and two side portions of the support frame border.
Claim 8
Dependent Claim
18 words
A support frame according to claim 1 and comprising a sealing flange through which the guide strip extends.
Claim 9
Dependent Claim
43 words
A support frame according to claim 1 and having a sealing flange for location of the support frame relative to the seal frame of a filter unit housing, said sealing flange being free from rigid attachment relative to the support frame guide strip.
Claim 10
Dependent Claim
32 words
A support frame according to claim 1 wherein the guide strip forming said side portions is fitted with a rectangular section channel member at each end region remote from said base portion.
Claim 11
Dependent Claim
23 words
A support frame according to claim 1 and comprising a pair of header plates adapted for entrainment of air during reverse air-jet pulsation.
Claim 12
Dependent Claim
22 words
A filter module comprising the assembly of a support frame according to claim 1 and a filter element supported by said frame.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |