US3228367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a heat exchanger
Assignee: Borg Warner Corp
•
Filing: 1962-12-20
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Granted: 1966-01-11
•
Expires: 1982-12-20
Abstract
No abstract record available.
Inventors
- 👤 Desmond M Donaldson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:19
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/24; F28F1/32; B; B21; B21D; B21D53/00; B21D53/02; B21D53/022; B21D53/025; B21D53/08; B21D53/085; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/4938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
A METHOD OF MANUFACTURING AN INTEGRAL FIN STRUCTURE HAVING A PLURALITY OF SPACED PARALLEL FIN SECTIONS COMPRISING THE STEPS OF (1) SLITTING AN ELONGATED STRIP OF RELATIVELY THIN SHEET METAL WITH A PLURALITY OF LONGITUDINALLY SPACED GROUPS OF TRANSVERSELY EXTENDING SLITS IN SAID STRIP, EACH GROUP COMPRISING A SERIES OF SPACED INDIVIDUAL SLITS EXTENDING TRANSVERSELY ACROSS THE WIDTH OF SAID STRIP, SAID INDIVIDUAL SLITS BEING ARRANGED SO THAT THERE IS FORMED BETWEEN ADJACENT SLITS AN UNCUT PORTION; (2) FORMING A PLURALITY OF TUBE APERTURES AT LOCATIONS BETWEEN ADJACENT GROUPS OF TRANSVERSE SLITS; (3) FORMING A PLURALITY OF RELATIVELY SHORTER LONGITUDINALLY EXTENDING SLITS INTERSECTING SAID SERIES OF SLITS ADJACENT THE TERMINAL PORTIONS THEREOF; (4) BENDING SAID STRIP IN THE VICINITY OF EACH ALIGNED GROUP OF SLITS IN OPPOSITE DIRECTIONS TO FORM A STRUCTURE IN WHICH A PLURALITY OF SUPERPOSED FIN SECTIONS ARE JOINED TO AN ADJACENT FIN SECTION BY THE UNCUT PORTIONS DEFINED BETWEEN THE LONGITUDINALLY EXTENDING SLITS; INSERTING A PLURALITY OF TUBES INTO SAID FIN STRUCTURE; AND (5) TWISTING EACH OF SAID TIE ELEMENTS THROUGH AN ANGLE OF ABOUT 90 DEGREES TO PRESENT AN EDGE PORTION CONFRONTING THE NORMAL FLOW OF AIR THROUGH SAID INTEGRAL FIN STRUCTURE.
Claim 2
Independent Claim
197 words
A METHOD OF MANUFACTURING AN INTEGRAL FIN STRUCTURE HAVING A PLURALITY OF SPACED PARALLEL FIN SECTIONS COMPRISING THE STEPS OF (1) SLITTING AN ELONGATED STRIP OF RELATIVELY THIN SHEET METAL WITH A PLURALITY OF LONGITUDINALLY SPACED GROUPS OF TRANSVERSELY EXTENDING SLITS IN SAID STRIP, EACH GROUP COMPRISING A SERIES OF SPACED INDIVIDUAL SLITS EXTENDING TRANSVERSELY ACROSS THE WIDTH OF SAID STRIP, SAID INDIVIDUAL SLITS BEING ARRANGED SO THAT THERE IS FORMED BETWEEN ADJACENT SLITS AN UNCUT PORTION; (2) FORMING A PLURALITY OF TUBE APERTURES AT LOCATIONS BETWEEN ADJACENT GROUPS OF TRANSVERSE SLITS; (3) FORMING A PLURALITY OF RELATIVELY SHORTER LONGITUDINALLY EXTENDING SLITS INTERSECTING SAID SERIES OF SLITS ADJACENT THE TERMINAL PORTIONS THEREOF; (4) BENDING SAID STRIP IN THE VICINITY OF EACH ALIGNED GROUP OF SLITS IN OPPOSITE DIRECTIONS TO FORM A STRUCTURE IN WHICH A PLURALITY OF SUPERPOSED FIN SECTIONS ARE JOINED TO AN ADJACENT FIN SECTION BY THE UNCUT PORTIONS DEFINED BETWEEN THE LONGITUDINALLY EXTENDING SLITS; INSERTING A PLURALITY OF TUBES INTO SAID FIN STRUCTURE; AND (5) TWISTING EACH OF SAID TIE ELEMENTS THROUGH AN ANGLE OF ABOUT 90 DEGREES TO PRESENT AN EDGE PORTION CONFRONTING THE NORMAL FLOW OF AIR THROUGH SAID INTEGRAL FIN STRUCTURE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |