US3234880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scum skimming and sludge pumping device
Assignee: Individual
•
Filing: 1964-12-22
•
Granted: 1966-02-15
•
Expires: 1984-12-22
Abstract
No abstract record available.
Inventors
- 👤 Quentin L Hampton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:36
CPC Classifications
F; F04; F04F; F04F1/00; F04F1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN COMBINATION WITH AN AIRLIFT PUMP INCLUDING A CONDUIT HAVING A LOWER INLET END ADAPTED TO BE DISPOSED ADJACENT THE BOTTOM OF A LIQUID CONTAINING TANK AND AN OUTLET END ADAPTED TO DISCHARGE EXTERNALLY OF THE TANK, AND MEANS FOR SUPPLYING AIR UNDER PRESSURE TO SAID CONDUIT ABOVE AND ADJACENT SAID INLET END FOR EXTRACTING SLUDGE FROM THE TANK BOTTOM; A SCUM CONDUIT HAVING A LOWER OUTLET END OPENING INTO THE AIRLIFT PUMP CONDUIT BETWEEN THE INLET END THEREOF AND SAID MEANS FOR SUPPLYING AIR UNDER PRESSURE THERETO FOR CREATING A NEGATIVE PRESSURE IN THE SCUM CONDUIT, AND SAID SCUM CONDUIT HAVING AN UPPER INLET END ADAPTED TO BE DISPOSED BENEATH AND ADJACENT THE LIQUID LEVEL IN THE TANK FOR SKIMMING SCUM THEREFROM WHEN A SUCTION IS CREATED IN THE SCUM CONDUIT.
Claim 2
Dependent Claim
132 words
IN COMBINATION WITH AN AIRLIFT PUMP INCLUDING A CONDUIT HAVING A LOWER INLET END ADAPTED TO BE DISPOSED ADJACENT THE BOTTOM OF A LIQUID CONTAINING TANK AND AN OUTLET END ADAPTED TO DISCHARGE EXTERNALLY OF THE TANK, AND MEANS FOR SUPPLYING AIR UNDER PRESSURE TO SAID CONDUIT ABOVE AND ADJACENT SAID INLET END FOR EXTRACTING SLUDGE FROM THE TANK BOTTOM; A SCUM CONDUIT HAVING A LOWER OUTLET END OPENING INTO THE AIRLIFT PUMP CONDUIT BETWEEN THE INLET END THEREOF AND SAID MEANS FOR SUPPLYING AIR UNDER PRESSURE THERETO FOR CREATING A NEGATIVE PRESSURE IN THE SCUM CONDUIT, AND SAID SCUM CONDUIT HAVING AN UPPER INLET END ADAPTED TO BE DISPOSED BENEATH AND ADJACENT THE LIQUID LEVEL IN THE TANK FOR SKIMMING SCUM THEREFROM WHEN A SUCTION IS CREATED IN THE SCUM CONDUIT.
References Cited (Backward Citations)
US1181783A
Cited
US3053390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |