US3570111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making metal fittimgs
Assignee: Weatherhead Co
•
Filing: 1968-09-11
•
Granted: 1971-03-16
•
Expires: 1988-09-11
Abstract
Abstract FORGED FITTINGS SUCH AS TUBE FITTINGS AND HOSE FITTINGS ARE FORMED FROM A BLANK OF COMPOSITE MATERIAL OF UNIFORM CROSS-SECTION HAVING A JACKET OF ONE METAL AND A CORE OF A DIFFERENT METAL HAVING A DIFFERENT MODULUS OF ELASTICITY. BY SIMULTANEOUSLY WORKING THE COMPOSITE BLANK AS IN A PROGRESSIVE HEADING MACHINE, THE CORE AND SHELL ARE WORKED TOGETHER TO BECOME MECHANICALLY INTERLOCKED IN THE FINISHED ARTICLE EVEN THOUGH NO ACTUAL BONDING TAKES PLACE BETWEEN THE DIFFERENT METALS. WHEN THE CORE HAS A LOWER MODULUS OF ELASTICITY IN THE FINISHED ARTICLE THE CORE IS IN COMPRESSION AND THE JACKET IS IN TENSION.
Inventors
- 👤 Thomas J Mack
- 👤 Louis B Courtot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:21
CPC Classifications
F; F16; F16L; F16L33/00; F16L33/20; F16L33/207; B; B21; B21K; B21K1/00; B21K1/14; B21K1/16; B25; B25B; B25B27/00; B25B27/02; B25B27/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49861; Y10T29/49908; Y10T29/49938
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |