Patent US3395676A successfully refreshed from Google Patents.
US3395676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor generator
Assignee: Babcock and Wilcox Co
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Filing: 1966-07-05
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Granted: 1968-08-06
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Expires: 1986-07-05
Abstract
No abstract record available.
Inventors
- 👤 Theodore S Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:29
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/06; F22B1/063; F28; F28F; F28F13/00; F28F13/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN A FLUID HEATING UNIT, A PRESSURE VESSEL, A PLURALITY OF TUBES IN SAID VESSEL ARRANGED FOR PARALLEL FLOW OF FLUID THERETHROUGH, MEANS FLOWING PRIMARY FLUID THROUGH THE VESSEL AND OVER THE TUBES, MEANS FLOWING A VAPORIZABLE SECONDARY FLUID THROUGH THE TUBES IN INDIRECT HEAT ABSORBING RELATION WITH THE PRIMARY FLUID, MEANS FOR CUTTING OFF FLUID SUPPLY TO SAID TUBES IN THE EVENT OF A TUBE FAILURE, MEANS FOR REVERSING THE DIRECTION OF FLUID FLOW IN SAID TUBES IN THE EVENT OF A TUBE FAILURE AND FOR DRAINING THE TUBES UPON SUCH FLOW REVERSAL, AND A FLOW RESISTOR IN THE INLET AND OUTLET PORTIONS OF EACH TUBE, EACH TUBE INLET RESISTOR BEING PROPORTIONED AND ARRANGED TO PROVIDE A SUBSTANTIAL SECONDARY FLUID PRESSURE TO DROP IN THE NORMAL SECONDARY FLOW DIRECTION TO PROMOTE STABLE AND UNIFORM FLOW THROUGH THE TUBES AND A RELATIVELY LOW PRESSURE DROP IN THE REVERSE
Claim 2
Dependent Claim
148 words
IN A FLUID HEATING UNIT, A PRESSURE VESSEL, A PLURALITY OF TUBES IN SAID VESSEL ARRANGED FOR PARALLEL FLOW OF FLUID THERETHROUGH, MEANS FLOWING PRIMARY FLUID THROUGH THE VESSEL AND OVER THE TUBES, MEANS FLOWING A VAPORIZABLE SECONDARY FLUID THROUGH THE TUBES IN INDIRECT HEAT ABSORBING RELATION WITH THE PRIMARY FLUID, MEANS FOR CUTTING OFF FLUID SUPPLY TO SAID TUBES IN THE EVENT OF A TUBE FAILURE, MEANS FOR REVERSING THE DIRECTION OF FLUID FLOW IN SAID TUBES IN THE EVENT OF A TUBE FAILURE AND FOR DRAINING THE TUBES UPON SUCH FLOW REVERSAL, AND A FLOW RESISTOR IN THE INLET AND OUTLET PORTIONS OF EACH TUBE, EACH TUBE INLET RESISTOR BEING PROPORTIONED AND ARRANGED TO PROVIDE A SUBSTANTIAL SECONDARY FLUID PRESSURE TO DROP IN THE NORMAL SECONDARY FLOW DIRECTION TO PROMOTE STABLE AND UNIFORM FLOW THROUGH THE TUBES AND A RELATIVELY LOW PRESSURE DROP IN THE REVERSE
References Cited (Backward Citations)
US3168136A
Cited
US3098023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |