US3221808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger head
Assignee: Pressed Steel Tank Co
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Filing: 1964-01-21
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Granted: 1965-12-07
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Expires: 1984-01-21
Abstract
No abstract record available.
Inventors
- 👤 Jr John W Pyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:45
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0236; F28F9/0239; F28F2230/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
IN A HEAT EXCHANGER OF THE TYPE HAVING A SHELL AND TUBES EXTENDING LENGTHWISE OF THE SHELL, A FLOATING TUBE SHEET HAVING AT LEAST A PORTION THEREOF WITHIN THE SHELL AND SUPPORTED BY THE SHELL CARRYING THE HEAT EXCHANGER TUBES, SAID FLOATING TUBE SHEET HAVING A SKIRT FORMING AN OPEN ENDED CHAMBER ADJACENT THE ENDS OF THE TUBES, A COVER FOR THE OPEN END OF THE CHAMBER, STUFFING BOX MEANS ADJACENT THE FLOATING TUBE SHEET, A GLAND ADAPTED TO CO-OPERATE WITH THE STUFFING BOX, MEANS TO SELECTIVELY SECURE THE COVER TO THE SKIRT AND WHEN THE COVER IS REMOVED, TO MOVE THE GLAND RELATIVE TO THE STUFFING BOX MEANS TO CO-OPERATE THEREWITH INCLUDING A RING SLIDABLY MOUNTED ON THE SKIRT, MEANS TO BACK-UP THE RING SECURED TO THE SKIRT, AND BOLT MEANS FOR ENGAGING THE RING AND THE COVER AND WHEN THE COVER IS REMOVED, TO ENGAGE THE RING AND THE SHELL, AND AN OUTER END COVER REMOVABLY SECURED TO THE SHELL.
Claim 2
Dependent Claim
162 words
IN A HEAT EXCHANGER OF THE TYPE HAVING A SHELL AND TUBES EXTENDING LENGTHWISE OF THE SHELL, A FLOATING TUBE SHEET HAVING AT LEAST A PORTION THEREOF WITHIN THE SHELL AND SUPPORTED BY THE SHELL CARRYING THE HEAT EXCHANGER TUBES, SAID FLOATING TUBE SHEET HAVING A SKIRT FORMING AN OPEN ENDED CHAMBER ADJACENT THE ENDS OF THE TUBES, A COVER FOR THE OPEN END OF THE CHAMBER, STUFFING BOX MEANS ADJACENT THE FLOATING TUBE SHEET, A GLAND ADAPTED TO CO-OPERATE WITH THE STUFFING BOX, MEANS TO SELECTIVELY SECURE THE COVER TO THE SKIRT AND WHEN THE COVER IS REMOVED, TO MOVE THE GLAND RELATIVE TO THE STUFFING BOX MEANS TO CO-OPERATE THEREWITH INCLUDING A RING SLIDABLY MOUNTED ON THE SKIRT, MEANS TO BACK-UP THE RING SECURED TO THE SKIRT, AND BOLT MEANS FOR ENGAGING THE RING AND THE COVER AND WHEN THE COVER IS REMOVED, TO ENGAGE THE RING AND THE SHELL, AND AN OUTER END COVER REMOVABLY SECURED TO THE SHELL.
References Cited (Backward Citations)
US1955433A
Cited
US2223238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |