Patent US3202208A successfully refreshed from Google Patents.
US3202208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange system with automatic pump control
Assignee: American Hydrotherm Corp
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Filing: 1962-08-22
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Granted: 1965-08-24
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Expires: 1982-08-22
Abstract
No abstract record available.
Inventors
- 👤 Geiringer Paul Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:20
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/10; F24D19/1006; F24D19/1009; F24D19/1012; F24D19/1015; F24D19/1024; F24D19/1033; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A CLOSED CIRCULATION HEAT EXCHANGE SYSTEM HAVING A SOURCE OF HOT WATER SUPPLY CONNECTED TO A SUPPLY LINE AND A RETURN LINE WITH A PUMPING MEANS TO FORCE SAID HOT WATER THROUGH SAID LINES FOR RETURN TO SAID SOURCE, A PLURALITY OF INDIVIDUAL HEAT EXCHANGER UNITS EACH CONNECTED BETWEEN SAID SUPPLY AND RETURN LINES WITH A THROTTLING CONTROL VALVE ASSOCIATED WITH EACH INDIVIDUAL HEAT EXCHANGER UNIT FOR CONTROLLING THE FLOW THERETHROUGH, AND MEANS INCLUDING A PRESSURE DIFFERENTIAL CONTROL UNIT HAVING PRESSURE CONNECTIONS ON EITHER SIDE OF AT LEAST ONE OF SAID CONTROL VALVES THAT IS LOCATED SUBSTANTIALLY AT THE END OF THE SUPPLY LINE REMOTE FROM SAID SOURCE OF SUPPLY TO SENSE THE PRESSURE DIFFERENTIAL ACROSS SAID ONE VALVE IN RESPONSE TO A CHANGE IN HEATING DEMAND AND MAINTAIN SAID ONE CONTROL VALVE SUBSTANTIALLY UNTHROTTLED BY PROPORTIONATELY VARYING THE SPEED OF THE PUMPING MEANS TO ESTABLISH AUTOMATIC REGULATION OF THE WATER SUPPLY.
Claim 2
Dependent Claim
152 words
A CLOSED CIRCULATION HEAT EXCHANGE SYSTEM HAVING A SOURCE OF HOT WATER SUPPLY CONNECTED TO A SUPPLY LINE AND A RETURN LINE WITH A PUMPING MEANS TO FORCE SAID HOT WATER THROUGH SAID LINES FOR RETURN TO SAID SOURCE, A PLURALITY OF INDIVIDUAL HEAT EXCHANGER UNITS EACH CONNECTED BETWEEN SAID SUPPLY AND RETURN LINES WITH A THROTTLING CONTROL VALVE ASSOCIATED WITH EACH INDIVIDUAL HEAT EXCHANGER UNIT FOR CONTROLLING THE FLOW THERETHROUGH, AND MEANS INCLUDING A PRESSURE DIFFERENTIAL CONTROL UNIT HAVING PRESSURE CONNECTIONS ON EITHER SIDE OF AT LEAST ONE OF SAID CONTROL VALVES THAT IS LOCATED SUBSTANTIALLY AT THE END OF THE SUPPLY LINE REMOTE FROM SAID SOURCE OF SUPPLY TO SENSE THE PRESSURE DIFFERENTIAL ACROSS SAID ONE VALVE IN RESPONSE TO A CHANGE IN HEATING DEMAND AND MAINTAIN SAID ONE CONTROL VALVE SUBSTANTIALLY UNTHROTTLED BY PROPORTIONATELY VARYING THE SPEED OF THE PUMPING MEANS TO ESTABLISH AUTOMATIC REGULATION OF THE WATER SUPPLY.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |