Patent US3257076A successfully refreshed from Google Patents.
US3257076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating system
Assignee: Individual
•
Filing: 1963-10-09
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Granted: 1966-06-21
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Expires: 1983-10-09
Abstract
No abstract record available.
Inventors
- 👤 Laing Nikolaus
- 👤 Noack Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:51
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/0005; F24D; F24D19/00; F24D19/10; F24D19/1006; F24D3/00; F24D3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
IN A HEATING SYSTEM, BOILER MEANS; A HEAT EXCHANGER; A SUPPLY LINE FOR DELIVERING FLUID TO SAID HEAT EXCHANGER; RETURN CONDUIT MEANS FOR CONVEYING FLUID FROM SAID HEAT EXCHANGER; AND A CONTROL UNIT CONNECTING SAID BOILER MEANS WITH SAID SUPPLY LINE AND WITH SAID RETURN CONDUIT MEANS, SAID UNIT COMPRISING A CONTROL DEVICE FOR REGULATING THE FLOW OF FLUID FROM SAID RETURN CONDUIT MEANS TO SAID BOILER MEANS AND TO SAID SUPPLY LINE SO THAT THE SUPPLY LINE MAY RECEIVER FLUID FROM AT LEAST ONE OF SAID MEANS, SAID UNIT FURTHER COMPRISING, A CROSSFLOW PUMP FOR CIRCULATING THE FLUID AND SAID PUMP COMPRISING A ROTOR PROVIDED WITH CLOSED ENDS AND HAVING SUCTION AND DISCHARGE AREAS AS ELONGATED BLADES WHICH IN CROSS SECTION ARE CURVED IN DIRECTION OF FLUID FLOW THROUGH THE ROTOR, SAID SUCTION LINE AND SAID RETURN CONDUIT MEANS EXTENDING UPWARDLY FROM SAID PUMP TO AN ELEVATION SUFFICIENT TO PROVIDE AT SAID SUCTION AREA A STATIC PRESSURE GREATER THAN THE DYNAMIC PRESSURE IN THE INTERIOR OF SAID ROTOR.
Claim 2
Dependent Claim
169 words
IN A HEATING SYSTEM, BOILER MEANS; A HEAT EXCHANGER; A SUPPLY LINE FOR DELIVERING FLUID TO SAID HEAT EXCHANGER; RETURN CONDUIT MEANS FOR CONVEYING FLUID FROM SAID HEAT EXCHANGER; AND A CONTROL UNIT CONNECTING SAID BOILER MEANS WITH SAID SUPPLY LINE AND WITH SAID RETURN CONDUIT MEANS, SAID UNIT COMPRISING A CONTROL DEVICE FOR REGULATING THE FLOW OF FLUID FROM SAID RETURN CONDUIT MEANS TO SAID BOILER MEANS AND TO SAID SUPPLY LINE SO THAT THE SUPPLY LINE MAY RECEIVER FLUID FROM AT LEAST ONE OF SAID MEANS, SAID UNIT FURTHER COMPRISING, A CROSSFLOW PUMP FOR CIRCULATING THE FLUID AND SAID PUMP COMPRISING A ROTOR PROVIDED WITH CLOSED ENDS AND HAVING SUCTION AND DISCHARGE AREAS AS ELONGATED BLADES WHICH IN CROSS SECTION ARE CURVED IN DIRECTION OF FLUID FLOW THROUGH THE ROTOR, SAID SUCTION LINE AND SAID RETURN CONDUIT MEANS EXTENDING UPWARDLY FROM SAID PUMP TO AN ELEVATION SUFFICIENT TO PROVIDE AT SAID SUCTION AREA A STATIC PRESSURE GREATER THAN THE DYNAMIC PRESSURE IN THE INTERIOR OF SAID ROTOR.
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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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |