US3127625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming screws from flat bar stock
Assignee: Individual
•
Filing: 1963-03-05
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Granted: 1964-04-07
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Expires: 1983-03-05
Abstract
No abstract record available.
Inventors
- 👤 Paul P Ruminsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:11
CPC Classifications
B; B21; B21J; B21J5/00; B21J5/06; B21J5/08; B21K; B21K1/00; B21K1/44; B21K1/46; B21K1/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
METHOD OF FORMING SCREWS COMPRISING: (A) TRIMMING A SHANK AND HEAD PORTION IN FLAT BAR STOCK; (B) FORMING UPSET PORTIONS BY SWAGING A LONGITUDINAL SLOT IN THE SIDE OF THE SHANK TO FLOW THE SHANK OUTWARDLY OF THE TOP AND BOTTOM SURFACES OF THE FLAT BAR STOCK, THUS THICKENING THE SHANK AT THE SIDE EDGES THEREOF; (C) COINING A SHEAR POINT ADJACENT SAID HEAD PORTION; AND (D) SWAGING THREADS IN SAID UPSET PORTIONS BY APPLYING A LATERAL FORCE TO SAID THICKENED EDGES OF SAID SHANK.
Claim 2
Dependent Claim
85 words
METHOD OF FORMING SCREWS COMPRISING: (A) TRIMMING A SHANK AND HEAD PORTION IN FLAT BAR STOCK; (B) FORMING UPSET PORTIONS BY SWAGING A LONGITUDINAL SLOT IN THE SIDE OF THE SHANK TO FLOW THE SHANK OUTWARDLY OF THE TOP AND BOTTOM SURFACES OF THE FLAT BAR STOCK, THUS THICKENING THE SHANK AT THE SIDE EDGES THEREOF; (C) COINING A SHEAR POINT ADJACENT SAID HEAD PORTION; AND (D) SWAGING THREADS IN SAID UPSET PORTIONS BY APPLYING A LATERAL FORCE TO SAID THICKENED EDGES OF SAID SHANK.
References Cited (Backward Citations)
US996840A
Cited
US2820972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |