US4212745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt filter
Assignee: EIMCO SpA A Co OF ITALY
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Filing: 1978-09-08
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Granted: 1980-07-15
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Expires: 1998-09-08
Abstract
Abstract Belt filter comprising a filter belt within a frame and a discharge casing connected with a suction device situated therebelow, the discharge casing comprising elements protruding from the bottom towards the filter belt supporting at least one meshed conveyor belt likewise to be driven longitudinally, and being narrower than the filter belt, such that the edges of the filter belt sealingly adjoin the outwardly diverging side edges of the discharge casing.
Inventors
- 👤 Anne Jellesma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:32
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/09; B01D29/096; B01D29/60; B01D29/606; B01D29/76; B01D29/78; B01D29/88; B01D29/92; B01D33/00; B01D33/04; B01D33/58; B01D33/60; B01D33/70; B01D33/74; B01D33/745; B01D33/80; B01D33/801; B01D33/804; B01D33/807; B01D33/44; B01D33/46; B01D33/466
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
179 words
A belt filter apparatus comprising: (a) a filter belt mounted within the apparatus frame supported by at least one longitudinally driven conveyor belt, (b) a suction casing with opposite upstanding longitudinal side walls and a spaced bottom pan which enclose the conveyor belt further comprising a plurality of aligned interposed conveyor belts, (c) supporting elements upstanding from the bottom of said casing; wherein said supporting elements in said suction casing have mutual distances closer than the mesh width of said conveyor belt bearing thereon, said mesh widths being larger than those of said filter belt, (d) the distance between said supporting elements being greater than the mesh of said conveyor belt which is greater than the mesh of said filter belt, (e) the upstanding side walls of said suction casing being the level of said conveyor belt which diverge outwardly into flared side edges which include a shallow angle with the transverse width of said filter belt and which sealingly support the edges of said filter belt which lie above and to both outer sides of said conveyor belt.
Claim 2
Dependent Claim
179 words
A belt filter apparatus comprising: (a) a filter belt mounted within the apparatus frame supported by at least one longitudinally driven conveyor belt, (b) a suction casing with opposite upstanding longitudinal side walls and a spaced bottom pan which enclose the conveyor belt further comprising a plurality of aligned interposed conveyor belts, (c) supporting elements upstanding from the bottom of said casing; wherein said supporting elements in said suction casing have mutual distances closer than the mesh width of said conveyor belt bearing thereon, said mesh widths being larger than those of said filter belt, (d) the distance between said supporting elements being greater than the mesh of said conveyor belt which is greater than the mesh of said filter belt, (e) the upstanding side walls of said suction casing being the level of said conveyor belt which diverge outwardly into flared side edges which include a shallow angle with the transverse width of said filter belt and which sealingly support the edges of said filter belt which lie above and to both outer sides of said conveyor belt.
Claim 3
Dependent Claim
28 words
A belt filter apparatus as claimed in claim 1 further comprising a discharge device and belt drive device operating intermittently when said conveyor belt stops and visa versa.
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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) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |