US3238754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and machine for making noncumulative force springs
Assignee: Ametek Inc
•
Filing: 1963-05-16
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Granted: 1966-03-08
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Expires: 1983-05-16
Abstract
No abstract record available.
Inventors
- 👤 Stanley L Albright
- 👤 Robert C Nace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:15
CPC Classifications
B; B21; B21F; B21F1/00; B21F23/00; B21F3/00; B21F3/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A MACHINE FOR COILING TIGHTLY COILED NONCUMULATIVE FORCE SPIRAL SPRINGS HAVING FEED ROLLS FOR FEEDING A STRIP OF SPRING METAL AND A GUIDE MEANS FOLLOWING THE FEED ROLLS TO GUIDE THE STRIP ALONG A PREDETERMINED PATH AFTER LEAVING SAID FEED ROLLS, THE IMPROVEMENT COMPRISING: STRIP BENDING MEANS PROVIDING AN ARCUATE SURFACE ADJACENT THE DISCHARGE END OF THE GUIDE MEANS, THE PLANE OF THE PATH PROVIDED BY SAID GUIDE MEANS ADJACENT ITS DISCHARGE END INTERSECTING SAID ARCUATE SURFACE TO CAUSE THE BENDING AND SETTING OF THE STRIP AND GUIDE MEANS TO CAUSE THE BENT STRIP TO CONFORM TO A PORTION OF THE ARCUATE SURFACE TO BACKBEND THE STRIP TO IMPACT RESIDUAL STRESSES THEREIN.
Claim 2
Dependent Claim
113 words
IN A MACHINE FOR COILING TIGHTLY COILED NONCUMULATIVE FORCE SPIRAL SPRINGS HAVING FEED ROLLS FOR FEEDING A STRIP OF SPRING METAL AND A GUIDE MEANS FOLLOWING THE FEED ROLLS TO GUIDE THE STRIP ALONG A PREDETERMINED PATH AFTER LEAVING SAID FEED ROLLS, THE IMPROVEMENT COMPRISING: STRIP BENDING MEANS PROVIDING AN ARCUATE SURFACE ADJACENT THE DISCHARGE END OF THE GUIDE MEANS, THE PLANE OF THE PATH PROVIDED BY SAID GUIDE MEANS ADJACENT ITS DISCHARGE END INTERSECTING SAID ARCUATE SURFACE TO CAUSE THE BENDING AND SETTING OF THE STRIP AND GUIDE MEANS TO CAUSE THE BENT STRIP TO CONFORM TO A PORTION OF THE ARCUATE SURFACE TO BACKBEND THE STRIP TO IMPACT RESIDUAL STRESSES THEREIN.
References Cited (Backward Citations)
US2647743A
Cited
US2923343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |