US4253856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter arrangement
Assignee: Bank of Nova Scotia
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Filing: 1979-11-09
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Granted: 1981-03-03
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Expires: 1999-11-09
Abstract
Abstract A filter installation for a filter housing including a header plate having an aperture of a predetermined diameter, a tubular filter, a venturi-like member extending through the aperture into one end of the filter, an annular shoulder on said member having an outermost diameter at least substantially the same as the diameter of the plate aperture, and a collar having an interior diameter less than the outermost diameter of the shoulder and surrounding the filter, said collar being releasably secured to the plate and retaining a portion of the filter between the plate and the collar to secure the filter to the plate.
Inventors
- 👤 Eugene Paucha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:26
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; B01D2265/02; B01D2265/022; B01D2265/028
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
172 words
A filter installation for a filter housing having a dirty gas inlet and a clean gas outlet, comprising: an apertured header plate including an aperture of a predetermined diameter disposed between the dirty gas inlet and the clean gas outlet; a tubular filter; a venturi-like member extending through the plate aperture into one end of the filter; said member including a tubular throat portion and an outwardly protruding shoulder proximate one end of said throat portion within the filter; said shoulder having an outermost diameter at least substantially the same as the diameter of the plate aperture; a collar surrounding the filter having an interior diameter less than the outermost diameter of the shoulder; said collar retaining a portion of the filter between the plate and the collar to form a pleat in the filter embracing the periphery of said shoulder; and attachment means releasably securing the collar to the plate clamping said pleat in sealing engagement with the marginal edge of the plate aperture to secure the filter to the plate.
Claim 2
Dependent Claim
172 words
A filter installation for a filter housing having a dirty gas inlet and a clean gas outlet, comprising: an apertured header plate including an aperture of a predetermined diameter disposed between the dirty gas inlet and the clean gas outlet; a tubular filter; a venturi-like member extending through the plate aperture into one end of the filter; said member including a tubular throat portion and an outwardly protruding shoulder proximate one end of said throat portion within the filter; said shoulder having an outermost diameter at least substantially the same as the diameter of the plate aperture; a collar surrounding the filter having an interior diameter less than the outermost diameter of the shoulder; said collar retaining a portion of the filter between the plate and the collar to form a pleat in the filter embracing the periphery of said shoulder; and attachment means releasably securing the collar to the plate clamping said pleat in sealing engagement with the marginal edge of the plate aperture to secure the filter to the plate.
Claim 3
Dependent Claim
22 words
The invention according to claim 1, and said attachment means including biasing means urging the collar into yielding engagement with said plate.
Claim 4
Dependent Claim
29 words
The invention according to claim 1, and said venturi-like member being of an elongated tubular configuration having axially flared end portions, one of said end portions providing said shoulder.
Claim 5
Dependent Claim
19 words
The invention according to claim 1, and filter support means within the filter being retained by said venturi-like member.
Claim 6
Dependent Claim
32 words
The invention according to claim 4, and said filter support means being an elongated tubular basket generally contiguous with the interior of the filter and having one end secured to said shoulder.
Claim 7
Dependent Claim
32 words
The invention according to claim 1, and said header plate including a pair of stiffening members disposed on opposing sides of the plate aperture; and said stiffening members carrying said attachment means.
Claim 8
Dependent Claim
90 words
The invention according to claim 6, and said attachment means including a pair of clips; connecting means pivotally securing each of said clips to a respective stiffening member on opposing sides of the plate aperture; a camming portion at one end of each clip engageable with the collar to carry it into clamping relation with the header plate upon rotation of the clip; and a connecting portion at the other end of each clip releasably couplable with its respective stiffening member to secure the clip in a collar clamping position.
Claim 9
Dependent Claim
37 words
The invention according to claim 7, and said connecting means being spaced from the header plate to receive and carry the collar in axial alignment with the plate aperture prior to securing the filter to the plate.
Claim 10
Dependent Claim
37 words
The invention according to claim 8, and said collar including a pair of protruding ear portions extending outwardly from opposing sides of the collar; and said ear portions being carried by said connecting means and camming portions.
Claim 11
Dependent Claim
33 words
The invention according to claim 8, and said collar including stop means cooperative with the connecting means to align said ear portions with the clips prior to securing the filter to the plate.
References Cited (Backward Citations)
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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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |