US3156040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal fabrication
Assignee: Bell Aerospace Corp
•
Filing: 1960-11-08
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Granted: 1964-11-10
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Expires: 1980-11-08
Abstract
No abstract record available.
Inventors
- 👤 Martin G Drexhage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:51
CPC Classifications
B; B21; B21F; B21F45/00; C; C22; C22C; C22C47/00; C22C47/16; C23; C23C; C23C4/00; C23C4/18; C23C4/185; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/937; Y10T; Y10T29/00; Y10T29/49; Y10T29/49346; Y10T29/49826; Y10T29/49863; Y10T29/49874; Y10T29/49888; Y10T29/4998; Y10T29/49982; Y10T428/00; Y10T428/12; Y10T428/12486
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
THE METHOD OF FABRICATING METAL ARTICLES PARTICULARLY FROM METALS OF LOW DUCTILITY, WHICH COMPRISES PLACING A PAIR OF RINGS ON OPPOSITE END PORTIONS OF A MANDREL HAVING AN INTERMEDIATE PORTION OF COMPOUND CURVATURE DIMENSIONED TO PASS NEITHER OF SAID RINGS, AND WITH SAID RINGS SPACED APART BY SAID INTERMEDIATE PORTION OF THE MANDREL, ATTACHING THE ENDS OF A SERIES OF HIGH TENSILE STRENGTH WIRES TO ONE OF SAID RINGS AT CIRCUMFERENTIALLY SPACED POINTS. THEREAROUND AND PASSING SUCH WIRES THEREFROM OVER SAID INTERMEDIATE PORTION OF THE MANDREL TO LIE AS A GEODESIC NETWORK THEREON BETWEEN THE RINGS, PRESTRESSING SAID WIRES AND ATTACHING THEM, WHILE PRESTRESSED, TO THE OTHER OF SAID RINGS, SPRAYING A METAL SKIN OVER SAID INTERMEDIATE PORTION OF SAID MANDREL AND SAID RINGS TO FORM A SHELL HAVING SAID WIRES EMBEDDED THEREIN, CUTTING AWAY THE INSIDE OF ONE OF SAID RINGS AT ITS ABUTMENT SURFACE WITH THE MANDREL TO PERMIT SUCH RING TO PASS OVER SAID INTERMEDIATE PORTION OF THE MANDREL, THEREBY RELEASING THE PRESTRESSING FORCE UPON THE WIRES AND EFFECTING COMPRESSION OF SAID SKIN, AND THEN REMOVING THE ARTICLE FROM THE MANDREL.
Claim 2
Independent Claim
184 words
THE METHOD OF FABRICATING METAL ARTICLES PARTICULARLY FROM METALS OF LOW DUCTILITY, WHICH COMPRISES PLACING A PAIR OF RINGS ON OPPOSITE END PORTIONS OF A MANDREL HAVING AN INTERMEDIATE PORTION OF COMPOUND CURVATURE DIMENSIONED TO PASS NEITHER OF SAID RINGS, AND WITH SAID RINGS SPACED APART BY SAID INTERMEDIATE PORTION OF THE MANDREL, ATTACHING THE ENDS OF A SERIES OF HIGH TENSILE STRENGTH WIRES TO ONE OF SAID RINGS AT CIRCUMFERENTIALLY SPACED POINTS. THEREAROUND AND PASSING SUCH WIRES THEREFROM OVER SAID INTERMEDIATE PORTION OF THE MANDREL TO LIE AS A GEODESIC NETWORK THEREON BETWEEN THE RINGS, PRESTRESSING SAID WIRES AND ATTACHING THEM, WHILE PRESTRESSED, TO THE OTHER OF SAID RINGS, SPRAYING A METAL SKIN OVER SAID INTERMEDIATE PORTION OF SAID MANDREL AND SAID RINGS TO FORM A SHELL HAVING SAID WIRES EMBEDDED THEREIN, CUTTING AWAY THE INSIDE OF ONE OF SAID RINGS AT ITS ABUTMENT SURFACE WITH THE MANDREL TO PERMIT SUCH RING TO PASS OVER SAID INTERMEDIATE PORTION OF THE MANDREL, THEREBY RELEASING THE PRESTRESSING FORCE UPON THE WIRES AND EFFECTING COMPRESSION OF SAID SKIN, AND THEN REMOVING THE ARTICLE FROM THE MANDREL.
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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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |