Patent US3244280A successfully refreshed from Google Patents.
US3244280A
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Aerated grit chamber
Assignee: Rex Chainbelt Inc
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Filing: 1963-09-09
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Granted: 1966-04-05
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Expires: 1983-09-09
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Lind
- 👤 William J Katz
- 👤 John L Mancini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:32
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/14; B; B01; B01D; B01D21/00; B01D21/0018; B01D21/02; B01D21/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE METHOD OF SEPARATING THE GRIT FROM SEWAGE AND TREATING THE GRIT FOR REMOVAL WHICH METHOD COMPRISES PASSING THE SEWAGE IN A LONGITUDINAL FLOW THROUGH A RELATIVELY LONG CHAMBER HAVING AN APPROXIMATELY SQUARE WETTED CROSS-SECTION AND A CENTRAL GRIT RECEIVING TROUGH BETWEEN TWO SLOPES ON WHICH THE GRIT CAN SETTLE, AND CIRCULATING THE SEWAGE IN A SECOND FLOW AROUND THE PERIPHERY OF THE CHAMBER AND NORMAL TO THE LONGITUDINAL FLOW AT A VELOCITY EFFECTING SCOURING OF THE GRIT WHICH TENDS TO SETTLE ON THE SLOPE OVER WHICH THE CIRCULATING SECOND FLOW IS UPWARD
Claim 2
Dependent Claim
186 words
IN AN AERATED GRIT CHAMBER HAVING A BOTTOM AND SIDE WALLS AND MEANS REGULATING A FLOW OF LIQUID THERETHROUGH TO MAINTAIN A GIVEN LIQUID LEVEL THEREIN, SAID CHAMBER HAVING A SERIES OF AIR OUTLETS ALONGSIDE ONE WALL, SAID BOTTOM HAVING A CENTRAL LENGTHWISE TROUGH AND DOWNWARD SLOPES FROM EACH WALL TO SAID TROUGH FOR COLLECTION OF GRIT IN THE TROUGH, A BAFFLE ABOVE THE SLOPE ADJOINING SAID ONE WALL AND SPACED FROM SAID ONE WALL A DISTANCE BETWEEN ONE-THIRD AND ONE-FIFTH THE WIDTH OF THE CHAMBER, AND THE BOTTOM AND TOP OF SAID BAFFLE BEING SPACED FROM SAID LAST NAMED SLOPE AND LIQUID LEVEL A DISTANCE LESS THAN ONE-HALF SAID DISTANCE TO SAID ONE WALL, AND AIR SUPPLY MEANS CONNECTED TO SAID OUTLET HAVING A CAPACITY PROVIDING CROSS-CIRCULATION OF THE FLOW THROUGH THE CHAMBER WHICH CIRCULATION INCLUDES A DIAGONAL SWEEP OVER SAID TROUGH AT A VELOCITY IN THE ORDER OF ONE FOOT PER SECOND OR LESS WHICH VELOCITY ALLOWS CLEAN DESPOSAL GRIT TO SETTLE IN SAID TROUGH AND CARRIES THE GRIT LIGHTENED BY ADHERING ORGANIC MATTER ACROSS THE TROUGH FOR SCOURING ON SAID LAST NAMED SLOPE.
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |