Patent US4276069A successfully refreshed from Google Patents.
US4276069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter arrangement
Assignee: Bank of Nova Scotia
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Filing: 1979-09-12
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Granted: 1981-06-30
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Expires: 1999-09-12
Abstract
Abstract A filter bag support member for fastening a filter bag to an apertured bag header plate member disposed between the dirty gas inlet and the clean gas outlet of a filter bag housing comprising a flow-through venturi-like tube having one end releasably fastened to the plate member and a clamp at the other end receiving the filter bag in supporting sealed relation.
Inventors
- 👤 David L. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:48
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/06; B01D46/42; B01D46/4281; B01D46/66; B01D46/70; B01D46/71; B01D2265/00; B01D2265/02; B01D2265/028; B01D2265/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
A filter arrangement adapted to be secured to an apertured header plate disposed across a dirty gas stream between the dirty gas inlet and the clean gas outlet of a filter bag housing, comprising: a tubular filter; a filter bag support member integrally formed of a relatively rigid resilient material including a venturi-like tube section forming a venturi extending through the member; said member having a flexible collar portion at one end of the tube section for releasably securing the member to the apertured plate and an annular shoulder portion formed at the other end of the tube section extending into one end of the filter; and clamping means surrounding said one end of the filter and securing it to said shoulder portion in supporting sealing relation proximate the throat of the venturi extending through the member to provide a relatively unobstructed opening at said one end of the filter, thereby essentially minimizing pressure losses in the gas stream flowing through the filter.
Claim 2
Dependent Claim
163 words
A filter arrangement adapted to be secured to an apertured header plate disposed across a dirty gas stream between the dirty gas inlet and the clean gas outlet of a filter bag housing, comprising: a tubular filter; a filter bag support member integrally formed of a relatively rigid resilient material including a venturi-like tube section forming a venturi extending through the member; said member having a flexible collar portion at one end of the tube section for releasably securing the member to the apertured plate and an annular shoulder portion formed at the other end of the tube section extending into one end of the filter; and clamping means surrounding said one end of the filter and securing it to said shoulder portion in supporting sealing relation proximate the throat of the venturi extending through the member to provide a relatively unobstructed opening at said one end of the filter, thereby essentially minimizing pressure losses in the gas stream flowing through the filter.
Claim 3
Dependent Claim
39 words
The filter arrangement according to claim 1, and said collar portion having an external groove about its periphery sized to receive the marginal edge of an associated aperture in the plate to secure the support member to the plate.
Claim 4
Dependent Claim
28 words
The filter arrangement according to claim 1, and said clamping means releasably gathering said one end of the filter into supporting sealing engagement with said annular shoulder portion.
Claim 5
Dependent Claim
33 words
The filter arrangement according to claim 3, and said annular shoulder portion having an external slot about its periphery; and said slot receiving said one end of the filter and said clamping means.
Claim 6
Dependent Claim
19 words
The filter arrangement according to claim 1, and said support member being formed of a molded plastic polymeric material.
Claim 7
Dependent Claim
20 words
The filter arrangement according to claim 1, and filter retaining means sheathed within the filter and extending generally coextensively therewithin.
Claim 8
Dependent Claim
58 words
The filter arrangement according to claim 1, and said tube section including a central conduit portion having an axially extending annular lip at said one end; and said collar being disposed in concentrically spaced surrounding relation with said lip to define a continuous annular channel between said lip and the collar generally laterally aligned with the apertured plate.
Claim 9
Dependent Claim
17 words
The filter arrangement according to claim 7, and a rigid ring member releasably secured in said channel.
Claim 10
Dependent Claim
53 words
The filter arrangement according to claim 1, and said shoulder portion including an axially extending annular rim portion and an axially extending sleeve disposed in concentrically spaced surrounding relation with said rim portion to define a continuous annular channel between the rim portion and the sleeve generally laterally aligned with said clamping means.
Claim 11
Dependent Claim
147 words
The filter arrangement according to claim 1, and said tube section including a central conduit portion having an axially extending annular lip at said one end and an axially extending annular rim portion at said other end; said collar portion extending from said conduit portion in concentrically spaced surrounding relation with said lip to define a first annular channel between said lip and the collar portion generally laterally aligned with the apertured plate; a sleeve at the other end of said conduit portion disposed in concentrically spaced surrounding relation with said rim portion to define a second annular channel between the rim portion and the sleeve generally laterally aligned with said clamping means; a rigid ring member releasably secured in each of said channels; and said clamping means being in substantially lateral alignment with said second channel connecting said one end of the filter with said sleeve.
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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) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |