Patent US3335485A successfully refreshed from Google Patents.
US3335485A
Expired / Lapsed
US
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Method for making elbows
Assignee: Individual
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Filing: 1964-08-04
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Granted: 1967-08-15
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Expires: 1984-08-04
Abstract
No abstract record available.
Inventors
- 👤 John I Russo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:49
CPC Classifications
B; B21; B21D; B21D9/00; B21D9/12; B21D9/125; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49444; Y10T29/49826; Y10T29/49879
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
THE METHOD OF FORMING AN ELBOW WHICH COMPRISES POSITIONING A LENGTH OF A STRAIGHT TUBE OF METAL IN A FORMING DIE HAVING A BORE SUBSTANTIALLY EQUAL TO THE OUTER DIAMETER OF THE DESIRED ELBOW, FILLING THE TUBE WITH SIZING BALLS HAVING A DIAMETER SUBSTANTIALLY EQUAL TO THE INTERNAL DIAMETER OF THE DESIRED ELBOW, APPLYING PRESSURE TO THE EXPOSED EDGE OF THE TUBE BY MEANS OF A PLUNGER UNTIL THE DESIRED BEND HAS BEEN EFFECTED, PUSHING THE SIZING BALLS THROUGH THE TUBE BY MEANS OF A NARROW PLUNGER TO SMOOTH THE INTERIOR OF THE BENT TUBE TO THE DESIRED UNIFORM DIAMETER, REMOVING A PORTION OF THE DIE TO ENLARGE THE BORE, EXPANDING AT LEAST ONE END OF THE BENT TUBE INTO THE ENLARGED BORE TO SIZE, AND REMOVING THE FINISHED ELBOW FROM THE DIE,
Claim 2
Independent Claim
133 words
THE METHOD OF FORMING AN ELBOW WHICH COMPRISES POSITIONING A LENGTH OF A STRAIGHT TUBE OF METAL IN A FORMING DIE HAVING A BORE SUBSTANTIALLY EQUAL TO THE OUTER DIAMETER OF THE DESIRED ELBOW, FILLING THE TUBE WITH SIZING BALLS HAVING A DIAMETER SUBSTANTIALLY EQUAL TO THE INTERNAL DIAMETER OF THE DESIRED ELBOW, APPLYING PRESSURE TO THE EXPOSED EDGE OF THE TUBE BY MEANS OF A PLUNGER UNTIL THE DESIRED BEND HAS BEEN EFFECTED, PUSHING THE SIZING BALLS THROUGH THE TUBE BY MEANS OF A NARROW PLUNGER TO SMOOTH THE INTERIOR OF THE BENT TUBE TO THE DESIRED UNIFORM DIAMETER, REMOVING A PORTION OF THE DIE TO ENLARGE THE BORE, EXPANDING AT LEAST ONE END OF THE BENT TUBE INTO THE ENLARGED BORE TO SIZE, AND REMOVING THE FINISHED ELBOW FROM THE DIE,
Claim 3
Independent Claim
183 words
THE METHOD OF FORMING AN ELBOW WHICH COMPRISES CUTTING THE FORWARD EDGE OF A LENGTH OF A STRAIGHT TUBE OF METAL TO PROVIDE A SLANTED FORWARD EDGE, POSITIONING THE SLANTED FORWARD EDGE IN A FORMING DIE HAVING A BORE SUBSTANTIALLY EQUAL TO THE OUTER DIAMETER OF THE DESIRED ELBOW, CUTTING THE LENGTH OF STRAIGHT TUBE WITH A DOUBLE SAW TO PROVIDE A SLANTED FORWARD EDGE AND A STRAIGHT BACK EDGE, FILLING THE TUBE WITH SIZING BALLS HAVING A DIAMETER SUBSTANTIALLY EQUAL TO THE INTERNAL DIAMETER OF THE DESIRED ELBOW, APPLYING PRESSURE TO THE EXPOSED EDGE OF THE TUBE BY MEANS OF A PLUNGER UNTIL THE DESIRED BEND HAS BEEN EFFECTED, PUSHING THE SIZING BALLS THROUGH THE TUBE BY MEANS OF A NARROW PLUNGER TO SMOOTH THE INTERIOR OF THE BENT TUBE TO THE DESIRED UNIFORM DIAMETER, COMPLETING THE PUSHING ACTION WITH A BLAST OF COMPRESSED AIR THROUGH THE NARROW PLUNGER, REMOVING A PORTION OF THE DIE TO ENLARGE THE BORE, EXPANDING AT LEAST ONE END OF THE BENT TUBE INTO THE ENLARGED BORE TO SIZE, AND REMOVING THE FINISHED ELBOW FROM THE DIE.
Claim 4
Independent Claim
183 words
THE METHOD OF FORMING AN ELBOW WHICH COMPRISES CUTTING THE FORWARD EDGE OF A LENGTH OF A STRAIGHT TUBE OF METAL TO PROVIDE A SLANTED FORWARD EDGE, POSITIONING THE SLANTED FORWARD EDGE IN A FORMING DIE HAVING A BORE SUBSTANTIALLY EQUAL TO THE OUTER DIAMETER OF THE DESIRED ELBOW, CUTTING THE LENGTH OF STRAIGHT TUBE WITH A DOUBLE SAW TO PROVIDE A SLANTED FORWARD EDGE AND A STRAIGHT BACK EDGE, FILLING THE TUBE WITH SIZING BALLS HAVING A DIAMETER SUBSTANTIALLY EQUAL TO THE INTERNAL DIAMETER OF THE DESIRED ELBOW, APPLYING PRESSURE TO THE EXPOSED EDGE OF THE TUBE BY MEANS OF A PLUNGER UNTIL THE DESIRED BEND HAS BEEN EFFECTED, PUSHING THE SIZING BALLS THROUGH THE TUBE BY MEANS OF A NARROW PLUNGER TO SMOOTH THE INTERIOR OF THE BENT TUBE TO THE DESIRED UNIFORM DIAMETER, COMPLETING THE PUSHING ACTION WITH A BLAST OF COMPRESSED AIR THROUGH THE NARROW PLUNGER, REMOVING A PORTION OF THE DIE TO ENLARGE THE BORE, EXPANDING AT LEAST ONE END OF THE BENT TUBE INTO THE ENLARGED BORE TO SIZE, AND REMOVING THE FINISHED ELBOW FROM THE DIE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |