Patent US3939076A successfully refreshed from Google Patents.
US3939076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal vacuum belt filter machine
Assignee: Straight Line Filters Inc
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Filing: 1974-12-20
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Granted: 1976-02-17
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Expires: 1994-12-20
Abstract
Abstract Horizontal vacuum belt filter machine comprises frame with spaced apart drums journaled to frame and endless belt structure mounted on drums. Endless belt structure has upper horizontal path of travel and comprises multiple longitudinally oriented endless belt segments arranged in side-by-side fashion with overlapping joint between adjacent edge portions of belt segments. Drums include first arrangement comprising multiple drums equal in number to multiple endless belt segments with each of multiple drums associated with separate one of belt segments. Drums further include second arrangement comprising single drum for multiple belt segments. Endless filter medium covers endless belt structure in area of upper horizontal path of belt travel, and suction device in area of upper horizontal path of belt travel cooperates with endless belt structure and filter medium for withdrawing liquid from slurry-like materials deposited upon filter medium.
Inventors
- 👤 Kenneth T. Seibert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
168 words
In a horizontal vacuum belt filter machine of the type comprising a frame, spaced apart drum means journaled to the frame at opposite ends thereof, endless belt means mounted on the drum means having an upper horizontal path of travel and comprising a plurality of separate longitudinally aligned endless belt segments, an endless filter medium supported upon the endless belt means in the area of the upper horizontal path of travel, and suction means beneath the upper horizontal path of travel cooperating with the endless belt means and the filter medium for withdrawing liquid from slurry-like material deposited upon the filter medium, the improvement being characterized by the separate endless belt segments each including edge portions recessed for overlapping sealing engagement with the recessed edge portion of an adjacent belt segment to form a leak resistant joint therebetween along the horizontal path of travel, the overlapping joint additionally acting by frictional cooperation to minimize relative longitudinal slippage between adjacent belt segments as they travel along the horizontal path.
Claim 2
Dependent Claim
168 words
In a horizontal vacuum belt filter machine of the type comprising a frame, spaced apart drum means journaled to the frame at opposite ends thereof, endless belt means mounted on the drum means having an upper horizontal path of travel and comprising a plurality of separate longitudinally aligned endless belt segments, an endless filter medium supported upon the endless belt means in the area of the upper horizontal path of travel, and suction means beneath the upper horizontal path of travel cooperating with the endless belt means and the filter medium for withdrawing liquid from slurry-like material deposited upon the filter medium, the improvement being characterized by the separate endless belt segments each including edge portions recessed for overlapping sealing engagement with the recessed edge portion of an adjacent belt segment to form a leak resistant joint therebetween along the horizontal path of travel, the overlapping joint additionally acting by frictional cooperation to minimize relative longitudinal slippage between adjacent belt segments as they travel along the horizontal path.
Claim 3
Dependent Claim
18 words
The combination of claim 1 in which the endless belt means comprises three longitudinally aligned endless belt segments.
Claim 4
Dependent Claim
81 words
The combination of claim 1 in which the endless belt means includes a base portion, and wherein one of the belt segments of the belt means includes an undercut side edge portion in its base portion while the adjacent belt segment includes a cutout side edge portion in its base portion whereby the undercut side edge portion of one of the belt segments mates with the cutout side edge portion of the adjacent belt segment to provide the overlapping sealing engagement.
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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) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |