Patent US4597784A successfully refreshed from Google Patents.
US4597784A
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US
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Industrial filter
Assignee: MOTOTRANS NARODNY PODNIK BANSKA BYSTRICA CZECHOSLOVAKIA
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Filing: 1985-02-01
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Granted: 1986-07-01
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Expires: 2005-02-01
Abstract
Abstract Industrial filter for separating solid particles from a streaming gaseous medium the filter having a filter insert formed from a single band of knitted fabric. The filter insert is provided with a smooth permeable layer of amorphous synthetic polymeric material at least on its inlet inside. Longitudinal and transverse packing sleeves of the filter insert are secured to marginal surfaces of a partition wall by means of a pressure sealing frame. Single filter pockets are inserted in the openings of the partition wall and in place between single filter pockets the filter insert sliding rests upon internal surfaces of the partition wall. During operation a certain amount of separated dust is forced into the gaps between the internal surfaces of partition walls and parts of the filter insert surfaces supported by those internal surfaces. Whereby the accumulated dust layer automatically compensates for the stretching of the needled fabric. The filter insert is provided with internal and external spacers that are swingingly suspended or attached to the partition wall and which maintain required form of the filter insert.
Inventors
- 👤 Jiri Albrecht
- 👤 Vaclav Mrstina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:51
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D39/00; B01D39/08; B01D39/083; B01D39/14; B01D39/20; B01D39/2003; B01D39/2017; B01D46/0001; B01D46/52; B01D46/521; B01D46/66; B01D46/70; B01D46/90; B01D2239/00; B01D2239/04; B01D2239/0457; B01D2239/06; B01D2239/065; B01D2239/0654; B01D2265/00; B01D2265/06; Y; Y10; Y10S; Y10S55/00; Y10S55/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
193 words
Industrial filter for separating solid particles from a streaming gaseous medium, comprising a multipocket filter insert with inlet and outlet sides comprising a single band of a knitted fabric folded into a number of flat pockets, two longitudinal packing sleeves and two transverse packing sleeves as well as connecting parts between single pockets, the resulting multipocket filter insert being provided with a smooth permeable layer of amorphous synthetic polymeric material on the whole surface at least of one of its sides both the longitudinal and the transverse pakcing sleeves of the multipocket filter insert being fixed to marginal surfaces of a partition wall of the filter by means of a pressure sealing frame, the connecting parts of the multipocket filter insert slidingly resting by their smooth permeable layer of amorphous synthetic polymeric material against the horizontal internal surfaces of the partition wall, the flat pockets being inserted on by one in each opening of a partition wall which is provided with internal spacers, between the single flat pockets there being external spacers, both the internal and the external spacers being swingingly suspended or attached to the partition wall by means of suspension elements.
Claim 2
Dependent Claim
193 words
Industrial filter for separating solid particles from a streaming gaseous medium, comprising a multipocket filter insert with inlet and outlet sides comprising a single band of a knitted fabric folded into a number of flat pockets, two longitudinal packing sleeves and two transverse packing sleeves as well as connecting parts between single pockets, the resulting multipocket filter insert being provided with a smooth permeable layer of amorphous synthetic polymeric material on the whole surface at least of one of its sides both the longitudinal and the transverse pakcing sleeves of the multipocket filter insert being fixed to marginal surfaces of a partition wall of the filter by means of a pressure sealing frame, the connecting parts of the multipocket filter insert slidingly resting by their smooth permeable layer of amorphous synthetic polymeric material against the horizontal internal surfaces of the partition wall, the flat pockets being inserted on by one in each opening of a partition wall which is provided with internal spacers, between the single flat pockets there being external spacers, both the internal and the external spacers being swingingly suspended or attached to the partition wall by means of suspension elements.
Claim 3
Dependent Claim
26 words
An industrial filter as claimed in claim 1, wherein the internal surfaces of the partition wall have a width from 2 cm up to 8 cm.
Claim 4
Dependent Claim
59 words
An industrial filter as claimed in claim 1 wherein the multipocket filter insert is formed from a knitted fabric consisting of a ground cloth provided with a fibrous fleece at least on the filter insert inlet side, a smooth permeable layer of amorphous synthetic polymeric material being created at least on the inlet side surface of the filter insert.
Claim 5
Dependent Claim
64 words
An industrial filter as claimed in claim 1, wherein the smooth permeable layer of amorphous synthetic polymeric material ranges on its internal side from the amorphous state to the form of synthetic fibers creating at least a part of the needled fabric structure of the filter insert, the smooth permeable layer being chosen from the group consisting of polyester, polyproplylene, polyacrylonitrile, and aromatic polyamide.
Claim 6
Dependent Claim
30 words
An industrial filter as claimed in claim 1, wherein the smooth permeable layer of amorphous synthetic polymeric material is formed by a polytetrafluoroethylene sheet fixed to the needled fabric surface.
Claim 7
Dependent Claim
37 words
An industrial filter as claimed in claim 1, wherein the ground cloth is created from threads chosen from the group consisting of polyester, polypropylene, polyacrylonitrile, aromatic polyamide, and glass, the fibers being in staples or endless form.
Claim 8
Dependent Claim
14 words
An industrial filter according to claim 6, wherein the filters are in staple form.
Claim 9
Dependent Claim
14 words
An industrial filter according to claim 6, wherein the fibers are in endless form.
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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) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |