US2752898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor generator
Assignee: Babcock and Wilcox Co
•
Filing: 1950-04-25
•
Granted: 1956-07-03
•
Expires: 1970-04-25
Abstract
No abstract record available.
Inventors
- 👤 Louis G Troutman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:11
CPC Classifications
F; F22; F22B; F22B21/00; F22B13/00; F22B13/14; F22B13/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
IN A VAPOR GENERATOR OF THE NATURAL CIRCULATION TYPE, MEANS FORMING PARALLEL VAPOR GENERATING CIRCUITS OF DISSIMILAR THERMO-SIPHONIC FLOW CHARACTERISTICS, SAID CIRCUITS INCLUDING BOTH A DRUM COMMON TO ALL OF SAID CIRCUITS AND RISER TUBES OF DISSIMILAR CIRCUITS HAVING LOWER END CONNECTIONS TO SAID DRUM IN A PLURALITY OF SEPARATE LONGITUDINAL ROWS, DOWNCOMER MEANS HAVING A FLUID SUPPLY CONNECTION TO SAID DRUM, MEANS DEFINING A FUEL-FIRED HEATING CHAMBER SUPPLYING HEAT TO SAID RISER TUBES AND TO WHICH A CONSIDERABLE NUMBER OF SAID TUBES ARE EXPOSED, MEANS WITH SAID DRUM FOR RESTRICTING FLUID FLOW FROM SAID DRUM INTO THE RISER TUBES OF SELECTED CIRCUITS HAVING THE HIGHER THERMO-SIPHONIC FLOW CHARACTERISTICS, SAID FLOW RESTRICTING MEANS COMPRISING A CHAMBERED RESTRICTION UNIT WITHIN SAID DRUM EMBRACING THE ENDS OF ALL THE RISER TUBES OF SAID SELECTED CIRCUITS, AND MEANS PARTITIONING SAID UNIT INTO SECTIONS RESPECTIVELY AND COMMUNICATING WITH THE ENDS OF RISER TUBES IN SAID SEPARATE ROWS.
Claim 2
Dependent Claim
153 words
IN A VAPOR GENERATOR OF THE NATURAL CIRCULATION TYPE, MEANS FORMING PARALLEL VAPOR GENERATING CIRCUITS OF DISSIMILAR THERMO-SIPHONIC FLOW CHARACTERISTICS, SAID CIRCUITS INCLUDING BOTH A DRUM COMMON TO ALL OF SAID CIRCUITS AND RISER TUBES OF DISSIMILAR CIRCUITS HAVING LOWER END CONNECTIONS TO SAID DRUM IN A PLURALITY OF SEPARATE LONGITUDINAL ROWS, DOWNCOMER MEANS HAVING A FLUID SUPPLY CONNECTION TO SAID DRUM, MEANS DEFINING A FUEL-FIRED HEATING CHAMBER SUPPLYING HEAT TO SAID RISER TUBES AND TO WHICH A CONSIDERABLE NUMBER OF SAID TUBES ARE EXPOSED, MEANS WITH SAID DRUM FOR RESTRICTING FLUID FLOW FROM SAID DRUM INTO THE RISER TUBES OF SELECTED CIRCUITS HAVING THE HIGHER THERMO-SIPHONIC FLOW CHARACTERISTICS, SAID FLOW RESTRICTING MEANS COMPRISING A CHAMBERED RESTRICTION UNIT WITHIN SAID DRUM EMBRACING THE ENDS OF ALL THE RISER TUBES OF SAID SELECTED CIRCUITS, AND MEANS PARTITIONING SAID UNIT INTO SECTIONS RESPECTIVELY AND COMMUNICATING WITH THE ENDS OF RISER TUBES IN SAID SEPARATE ROWS.
References Cited (Backward Citations)
DE147733C
Cited
US973541A
Cited
US664745A
Cited
US1469389A
Cited
US1898196A
Cited
GB415517A
Cited
US2030503A
Cited
US2029010A
Cited
US2194098A
Cited
US2578831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |