US4300927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pocket filter arrangement
Assignee: Bank of Nova Scotia
•
Filing: 1980-10-31
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Granted: 1981-11-17
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Expires: 2000-10-31
Abstract
Abstract A pocket filter cartridge including at least one sheath-like filter bag which is suspended from a mounting sleeve affixed to an apertured header plate disposed across a dirty gas stream by a retaining collar holding it in press-fit clamping relation to the mounting member.
Inventors
- 👤 Charles E. Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:30
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/023
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
171 words
A pocket filter cartridge for removing particulate solids from a dirty gas stream, comprising: a relatively flat, sheath-like filter bag open at one end; a header plate carrying the filter bag and being adapted to be secured across the dirty gas stream, said plate including an aperture opening into the open end of the filter bag and a projecting lip forming the marginal edge of the plate aperture; a flow-through mounting member disposed in the open end of the filter bag; a retaining collar cooperating with the mounting member sized to surround the filter and secure it between the mounting member in press-fit clamping relation; a shoulder on said mounting member surroundingly engaging said projecting lip to align the filter bag in flow-through communication with the plate aperture; and fastening means comprising a first serrate edge about the exterior periphery of said projecting lip and a second serrate edge about the interior periphery of said shoulder cooperating with said first serrate edge to secure the mounting member to the header plate.
Claim 2
Dependent Claim
171 words
A pocket filter cartridge for removing particulate solids from a dirty gas stream, comprising: a relatively flat, sheath-like filter bag open at one end; a header plate carrying the filter bag and being adapted to be secured across the dirty gas stream, said plate including an aperture opening into the open end of the filter bag and a projecting lip forming the marginal edge of the plate aperture; a flow-through mounting member disposed in the open end of the filter bag; a retaining collar cooperating with the mounting member sized to surround the filter and secure it between the mounting member in press-fit clamping relation; a shoulder on said mounting member surroundingly engaging said projecting lip to align the filter bag in flow-through communication with the plate aperture; and fastening means comprising a first serrate edge about the exterior periphery of said projecting lip and a second serrate edge about the interior periphery of said shoulder cooperating with said first serrate edge to secure the mounting member to the header plate.
Claim 3
Dependent Claim
25 words
The filter cartridge according to claim 1, and a plurality of said filter bags being secured to said header plate in generally parallel side-by-side relation.
Claim 4
Dependent Claim
33 words
The filter cartridge according to claim 1, and said filter bag extending downstream from the header plate so that the open end of the bag opens to the upstream side of the plate.
Claim 5
Dependent Claim
27 words
The filter cartridge according to claim 1, and said mounting member being of a relatively tapered cross-sectional configuration, to enhance the transverse rigidity of the header plate.
Claim 6
Dependent Claim
34 words
The filter cartridge according to claim 1, and said projecting lip having a groove about its periphery; and said shoulder being contiguously engaged within said groove in dust-tight sealing engagement with the header plate.
Claim 7
Dependent Claim
24 words
The filter cartridge according to claim 1, and said header plate, mounting member, and retaining collar being formed of an injection molded plastic material.
Claim 8
Dependent Claim
21 words
The filter cartridge according to claim 6, and said retaining collar being affixed to said mounting member by a sonic weld.
Claim 9
Dependent Claim
24 words
The filter cartridge according to claim 6, and said fastening means further comprising a sonic weld securing the mounting member to the header plate.
References Cited (Backward Citations)
US2945554A
Cited
US3524304A
Cited
US3190059A
Cited
US3422602A
Cited
US3616625A
Cited
US3815754A
Cited
US3871848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |