US3258068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell and tube heat exchanger
Assignee: Foster Wheeler Inc
•
Filing: 1963-11-29
•
Granted: 1966-06-28
•
Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Solomon C Hollister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:06
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28D; F28D7/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A HEAT EXCHANGER INCLUDING A HEAD COMPRISING A TUBE SHEET, A HEMISPHERICAL CHANNEL MEMBER WELDED TO THE TUBE SHEET, THE TUBE SHEET INCLUDING A FLAT PLATE AREA TO WHICH THE TUBES OF THE HEAT EXCHANGER ARE CONNECTED, AN ANNULAR LIP, THE LIP COMPRISING A PERIPHERAL NECK PORTION EXTENDING RADIALLY OUTWARDLY FROM THE SIDES OF THE TUBE PLATE, A FLANGE PORTION FLARING UPWARDLY AND OUTWARDLY AWAY FROM THE NECK PORTION, THE NECK PORTION BEING GROOVED WITH AN INSIDE RADIUS BETWEEN THE FLANGE PORTION AND THE TUBE PLATE FOR MINIMUM STRESS CONCENTRATION, THE FLANGE PORTION HAVING A FREE EDGE OF APPROXIMATELY THE SAME DIAMETER AS THE HEMISPHERICAL CHANNEL MEMBER, THE CHANNEL MEMBER BEING WELDED TO THE FLANGE PORTION BY AN EXTERNAL GIRTH WELD.
Claim 2
Dependent Claim
121 words
A HEAT EXCHANGER INCLUDING A HEAD COMPRISING A TUBE SHEET, A HEMISPHERICAL CHANNEL MEMBER WELDED TO THE TUBE SHEET, THE TUBE SHEET INCLUDING A FLAT PLATE AREA TO WHICH THE TUBES OF THE HEAT EXCHANGER ARE CONNECTED, AN ANNULAR LIP, THE LIP COMPRISING A PERIPHERAL NECK PORTION EXTENDING RADIALLY OUTWARDLY FROM THE SIDES OF THE TUBE PLATE, A FLANGE PORTION FLARING UPWARDLY AND OUTWARDLY AWAY FROM THE NECK PORTION, THE NECK PORTION BEING GROOVED WITH AN INSIDE RADIUS BETWEEN THE FLANGE PORTION AND THE TUBE PLATE FOR MINIMUM STRESS CONCENTRATION, THE FLANGE PORTION HAVING A FREE EDGE OF APPROXIMATELY THE SAME DIAMETER AS THE HEMISPHERICAL CHANNEL MEMBER, THE CHANNEL MEMBER BEING WELDED TO THE FLANGE PORTION BY AN EXTERNAL GIRTH WELD.
References Cited (Backward Citations)
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Cited
US1963338A
Cited
US1963337A
Cited
US2366617A
Cited
US2766903A
Cited
US2920789A
Cited
US3176761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |