US3743100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter press, more particularly for dewatering sludge in sewage treatment plants
Assignee: Individual
•
Filing: 1971-06-07
•
Granted: 1973-07-03
•
Expires: 1991-06-07
Abstract
Abstract A process for dewatering sludge particularly for dewatering sludge in sewage treatment plant by means of a filter presshaving belts one at least of which is a filter belt, the sludge being conveyed around a drum between belts both of which pass around the drum the sludge being squeezed between the belts as it is conveyed around the drum by the belts.
Inventors
- 👤 A Bahr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:31
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/12; C02F11/121; C02F11/123; B; B01; B01D; B01D33/00; B01D33/04; B01D33/042; B01D33/056; B01D33/06; B01D33/44; B01D33/46; B01D33/466; B01D33/58; B01D33/62; B01D33/64; B01D33/646; B30; B30B; B30B9/00; B30B9/02; B30B9/24; B30B9/246; C02F11/008
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
203 words
A filter press comprising a machine frame, a cylindrical cage structure mounted on said frame for rotation about an axis and having a circular series of relatively rotatable belt supporting rollers on a pitch circle concentric with the axis of said cage structure; a circular series of counter rollers concentric with the axis of said cage structure; bearing means on said machine frame mounting said counter rollers on a pitch circle of larger diameter than said pitch cIrcle of said belt supporting rollers and supporting said counter rollers on parallel axes extending axially of said cage structure; first and second endless belts extending partially around said cage structure between said belt supporting rollers and said counter rollers, at least one of said belts being a filter belt, and the belt supported by said cage structure presenting its radially outer side to the radially inner side of the other belt; roller means cooperable with said other belt for placing the latter in double loop formation and presenting the closed ends of the double loop in relatively spaced relation at one side of said cage structure; and sludge feeding means operable to deliver sludge between the belts at said one side of said cage structure.
Claim 2
Dependent Claim
203 words
A filter press comprising a machine frame, a cylindrical cage structure mounted on said frame for rotation about an axis and having a circular series of relatively rotatable belt supporting rollers on a pitch circle concentric with the axis of said cage structure; a circular series of counter rollers concentric with the axis of said cage structure; bearing means on said machine frame mounting said counter rollers on a pitch circle of larger diameter than said pitch cIrcle of said belt supporting rollers and supporting said counter rollers on parallel axes extending axially of said cage structure; first and second endless belts extending partially around said cage structure between said belt supporting rollers and said counter rollers, at least one of said belts being a filter belt, and the belt supported by said cage structure presenting its radially outer side to the radially inner side of the other belt; roller means cooperable with said other belt for placing the latter in double loop formation and presenting the closed ends of the double loop in relatively spaced relation at one side of said cage structure; and sludge feeding means operable to deliver sludge between the belts at said one side of said cage structure.
Claim 3
Dependent Claim
55 words
A filter press as set forth in claim 1 wherein said bearing means for said counter rollers support the latter for radial movement relative to said cage structure, and wherein resilient means are operatively interposed between said machine frame and said bearing means so as to yieldingly urge said counter rollers toward said cage structure.
Claim 4
Dependent Claim
32 words
A filter press as set forth in claim 1 wherein the number of belt supporting rollers on said cage structure is larger than the number of counter rollers on said machine frame.
Claim 5
Dependent Claim
22 words
A filter press as set forth in claim 1 and further comprising variable speed power transmitting means for driving said cage structure.
Claim 6
Dependent Claim
28 words
A filter press as set forth in claim 1 wherein both of said belts are filter belts and wherein fluid intercepting means are mounted within said cage structure.
Claim 7
Dependent Claim
15 words
A filter press as set forth in claim 1, where said axis is disposed horizontally.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |