Patent US3572429A successfully refreshed from Google Patents.
US3572429A
Expired / Lapsed
US
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Heat exchanger
Assignee: Individual
•
Filing: 1969-01-13
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Granted: 1971-03-23
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Expires: 1989-01-13
Abstract
Abstract A HEAT EXCHANGER COMPRISING A SHELL, SURROUNDING A CORE-UNIT CONSISTING OF PARALLEL TUBES SUPPORTED BY AXIALLY SPACED HEADERS. ONE HEADER IS FIXED AXIALLY, WHILE THE OTHER HEADER IS FREE OT SHIFT AXIALLY IN THE SHELL IN RESPONSE TO TEMPERATURE FLUCTUATIONS. THE BONNET CLOSING ONE END OF THE SHELL IS PROVIDED WITH A DIAMETRICALLY-POSITIONED RESILIENT SEALING MEMBER WHICH ENGAGES THE SURFACE OF THE AXIALLY-FREE HEADER TO PROVIDE A PAIR OF CHAMBERS IN THE BONNET, AND TO PREVENT FLUID FROM PASSING FROM ONE CHAMBER TO THE OTHER. MEANS IS ALSO PROVIDED TO INDICATE INSTANCES OF LEAKAGE BETWEEN THE MUTUAL PERIPHERIES OF THE SHELL AND THE AXIALLY-FREE HEADER.
Inventors
- 👤 Royse Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:48
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0236; F28F9/0241; F28D; F28D7/00; F28D7/16; F28D7/163; F28D7/1638; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/053; Y10S165/058
Claims Analysis
Total Claims: 0
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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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |