Patent US3305013A successfully refreshed from Google Patents.
US3305013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat radiator
Assignee: Webasto Werk W Baier GmbH and Co
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Filing: 1964-09-30
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Granted: 1967-02-21
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Expires: 1984-09-30
Abstract
Abstract 1,001,934. Heat exchangers. WEBASTOWERK G.m.b.H. Aug. 4, 1964 [Nov. 1, 1963], No. 31074/64. Heading F4S. [Also in Division B3] A duct 2 having walls 1 of one metal, e.g. steel, has fins 3 of another metal, e.g. copper, soldered thereto in a non-reactive gas atmosphere, each fin or pair of fins being integral with a soldering strip 6 (Fig. 2, not shown) and having at least one dividing cut 7, 8 to relieve thermal stresses. Before soldering, the fins may be bound on to the duct by a wire loop 9 (Fig. 2, not shown) passing through the cuts.
Inventors
- 👤 Friedl Reiner
- 👤 Linde Robert Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:19
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/14; F28F1/20; F28F2275/00; F28F2275/04; F28F2275/045; F28F2280/00; F28F2280/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A HEAT RADIATOR HAVING A CYLINDRICAL HEATING FLUID DUCT OF ONE METAL AND FIN UNITS OF ANOTHER METAL HAVING A DIFFERENT COEFFICIENT OF EXPANSION AND A SECOND DUCT SURROUNDING SAID UNITS, SAID UNITS HAVING FIN ELEMENTS PROJECTING RADIALLY FROM SAID DUCT AND BEING ELONGATED IN THE AXIAL DIRECTION OF SAID DUCT, SAID FIN ELEMENTS BEING FORMED IN PAIRS EACH OF WHICH COMPRISES A SHEET OF SAID OTHER METAL BENT INTERMEDIATE ITS WIDTH TO FORM A CENTRAL LONGITUDINAL LOOP AND WITH ONE OF SAID FIN ELEMENTS AT EACH SIDE OF SAID LOOP TERMINATING IN A FREE EDGE, SAID FIN UNITS BEING SOLDERED TO SAID DUCT BY MEANS OF CONTINUOUS SOLDERING THROUGHOUT THE LENGTHS OF SAID LOOPS, EACH OF SAID FIN ELEMENTS HAVING A TRANSVERSE SLOT IN ITS RADIALLY OUTER PORTION, SAID SLOTS HAVING THEIR RADIALLY INNER EXTREMITIES TERMINATING IN RELATIVELY CLOSE PROXIMITY TO SAID LOOPS, AND A BINDING WIRE AROUND SAID UNITS IN SAID SLOTS.
Claim 2
Dependent Claim
154 words
A HEAT RADIATOR HAVING A CYLINDRICAL HEATING FLUID DUCT OF ONE METAL AND FIN UNITS OF ANOTHER METAL HAVING A DIFFERENT COEFFICIENT OF EXPANSION AND A SECOND DUCT SURROUNDING SAID UNITS, SAID UNITS HAVING FIN ELEMENTS PROJECTING RADIALLY FROM SAID DUCT AND BEING ELONGATED IN THE AXIAL DIRECTION OF SAID DUCT, SAID FIN ELEMENTS BEING FORMED IN PAIRS EACH OF WHICH COMPRISES A SHEET OF SAID OTHER METAL BENT INTERMEDIATE ITS WIDTH TO FORM A CENTRAL LONGITUDINAL LOOP AND WITH ONE OF SAID FIN ELEMENTS AT EACH SIDE OF SAID LOOP TERMINATING IN A FREE EDGE, SAID FIN UNITS BEING SOLDERED TO SAID DUCT BY MEANS OF CONTINUOUS SOLDERING THROUGHOUT THE LENGTHS OF SAID LOOPS, EACH OF SAID FIN ELEMENTS HAVING A TRANSVERSE SLOT IN ITS RADIALLY OUTER PORTION, SAID SLOTS HAVING THEIR RADIALLY INNER EXTREMITIES TERMINATING IN RELATIVELY CLOSE PROXIMITY TO SAID LOOPS, AND A BINDING WIRE AROUND SAID UNITS IN SAID SLOTS.
References Cited (Backward Citations)
DE360245C
Cited
US851978A
Cited
US1797030A
Cited
US1840724A
Cited
FR707514A
Cited
US2298249A
Cited
US2737370A
Cited
FR1015904A
Cited
GB813006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |