US4504288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular-filter device with compressed-air cleanout
Assignee: Ventilatorenfabrik Oelde GmbH
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Filing: 1983-12-12
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Granted: 1985-03-12
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Expires: 2003-12-12
Abstract
Abstract A tubular-filter device with compressed-air cleanout has a tube-acceptor plate with insertion openings, each of which having a tubular filter fastened therein with a support basket in each tubular filter. The support basket has a resilient upper edge and the tubular filter is clamped with a band tightly in the soffit area of the insertion opening. A filter-pot cover extends into the top of the tubular filter and is attached to the top of the tube-acceptor plate. The cover has an extension that projects into the support basket and that is secured on all sides by an upper, radially sectional ring of the support basket by a snap attachment positioned along the outside thereof and cooperative with the upper ring of the support basket.
Inventors
- 👤 Rolf H. Kreft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:20
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/0002; B01D46/0005; B01D46/42; B01D46/4281; B01D46/66; B01D46/70; B01D46/71; B01D2265/00; B01D2265/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
169 words
In a tubular-filter device with compressed-air cleanout having a tube-acceptor plate with insertion openings in the top thereof and a tubular filter for each opening having a resilient band around the top thereof for axially fastening same in the opening, the improvement comprising: a support basket in each filter having an upper radially sectioned ring; a filter-pot cover having a portion extending into the top of the tubular filter and support basket; means attaching the filter pot cover to the top of the tube-acceptor plate; and means disposed on the portion of the filter-pot cover that extends into the support basket and cooperative with the radially sectioned ring of the support basket to form a snap attachment for axially securing the upper ring of the support basket to the filter-pot cover in any one of a plurality of axial positions relative to the top of the tubular filter, whereby the tubular filter can be axially tensioned by moving the basket axially away from the fixed top of the filter.
Claim 2
Dependent Claim
169 words
In a tubular-filter device with compressed-air cleanout having a tube-acceptor plate with insertion openings in the top thereof and a tubular filter for each opening having a resilient band around the top thereof for axially fastening same in the opening, the improvement comprising: a support basket in each filter having an upper radially sectioned ring; a filter-pot cover having a portion extending into the top of the tubular filter and support basket; means attaching the filter pot cover to the top of the tube-acceptor plate; and means disposed on the portion of the filter-pot cover that extends into the support basket and cooperative with the radially sectioned ring of the support basket to form a snap attachment for axially securing the upper ring of the support basket to the filter-pot cover in any one of a plurality of axial positions relative to the top of the tubular filter, whereby the tubular filter can be axially tensioned by moving the basket axially away from the fixed top of the filter.
Claim 3
Dependent Claim
33 words
The tubular-filter device in claim 1, wherein the means forming the snap attachment comprises several continuous grooves spaced apart at equal intervals along the portion of the filter-pot cover extending into the basket.
Claim 4
Dependent Claim
17 words
The tubular-filter device in claim 2, further comprising an air nozzle securely attached in the filter-pot cover.
Claim 5
Dependent Claim
17 words
The tubular-filter device in claim 1, further comprising an air nozzle securely attached in the filter-pot cover.
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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) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |