US4293321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastening device for filter bags in dust-laden gas filters
Assignee: Intensiv Filter GmbH and Co KG
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Filing: 1980-07-07
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Granted: 1981-10-06
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Expires: 2000-07-07
Abstract
Abstract In a fastening device for the dust-tight fastening of filter bags in a separation plate between crude gas and purified gas chambers in dust-laden gas filters, an elastic nipple, formed as a slit ring, is inserted into the open end of each filter bag. In order to produce the radially acting fastening and sealing force, a clamping ring (6) is swingably supported in the nipple (5), said ring being provided with flats (6a) on two sides which are opposite each other. On each side of the slit in the nipple (5) two protrusions (5b) are provided between which the clamping ring (6) is locked in installed condition. In unlocked upward swung condition upon the installing or removal of the nipple (5), the clamping ring (6) can be used as handle, either without or with attached filter supporting basket (5c).
Inventors
- 👤 Friedel Kordas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:35
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44291; Y10T24/44496; Y10T24/44513; Y10T24/44521
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
92 words
A fastening device for the dust-tight attachment of a filter bag having an open end in a separation plate between crude gas and purified gas chambers in dust-laden gas filters, comprising an elastic socket, a clamping ring being swingably mounted in said elastic socket is adapted to be disposed at the open end of the filter bag with said elastic socket pressing the open end of the filter bag into holding engagement onto the separation plate, said clamping ring being formed with flattened portions on two sides which are opposite each other.
Claim 2
Dependent Claim
92 words
A fastening device for the dust-tight attachment of a filter bag having an open end in a separation plate between crude gas and purified gas chambers in dust-laden gas filters, comprising an elastic socket, a clamping ring being swingably mounted in said elastic socket is adapted to be disposed at the open end of the filter bag with said elastic socket pressing the open end of the filter bag into holding engagement onto the separation plate, said clamping ring being formed with flattened portions on two sides which are opposite each other.
Claim 3
Dependent Claim
18 words
The device according to claim 1, wherein said socket is formed as a split ring defining a slit.
Claim 4
Dependent Claim
35 words
The device according to claim 2, wherein said socket has two protrusions on each side of said slit, said clamping ring in a fastening position coaxial to said socket is adapted to engage said protrusions.
Claim 5
Dependent Claim
25 words
The device according to claim 1 or 2, wherein said socket is formed with an outwardly arched rib adapted to overlap under the separation plate.
Claim 6
Dependent Claim
29 words
The device according to claim 1, wherein said clamping ring in an unlocked upwardly swung condition constitutes a handle adapted for use during installation and removal of the socket.
Claim 7
Dependent Claim
16 words
The device according to claim 5, wherein said socket includes a filter supporting basket attached thereto.
Claim 8
Dependent Claim
18 words
The device according to claim 1, wherein said clamping ring forms an inlet nozzle having a tubular portion.
Claim 9
Dependent Claim
19 words
The device according to claim 1, wherein said clamping ring constitutes an upper part of a divided two-part injector.
Claim 10
Dependent Claim
17 words
The device according to claim 1, wherein said clamping ring exclusively has the shape of a ring.
Claim 11
Dependent Claim
15 words
The device according to claim 9, wherein said clamping ring is formed with a slit.
Claim 12
Dependent Claim
43 words
The device according to claim 1, further comprising means for pivotally connecting said clamping ring to said elastic socket at said flattened portions, said clamping ring presses said socket radially outwardly in a fastening position of said clamping ring coaxial to said socket.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |