US2744315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for die-forging articles from blanks of normally rigid material
Assignee: Pneumatic Drop Hammer Co
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Filing: 1951-11-15
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Granted: 1956-05-08
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Expires: 1971-11-15
Abstract
No abstract record available.
Inventors
- 👤 Reginald P Fitzgerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:10
CPC Classifications
B; B21; B21J; B21J7/00; B21J7/20; B21J7/36; B21J7/38; B21J5/00; B21J5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF DIE-FORGING ARTICLES FROM BLANKS OF NORMALLY RIGID MATERIAL WHICH COMPRISES PLACING A BLANK BETWEEN COMPLEMENTARY DIES, MOVING THE DIES INTO TIGHT CLAMPING ENGAGEMENT WITH THE BLANK TO PREVENT SHIFTING OF THE BLANK WITH RESPECT TO THE DIES WHEN THE DIES ARE STRUCK A HEAVY BLOW, AND WHILE THE DIES STILL CLAMP THE BLANK CAUSING A HEAVY MASS FALLING A SHORT DISTANCE TO IMPINGE UPON THE DIES WITH THE SAID MASS SO RELATED TO THE SAID DISTANCE THAT PRESSURE WAVE CURVE PRODUCED IS OF A WAVY TRAPEZOIDAL SHAPE AS DISTINGUISHED FROM A GENERALLY PARABOLIC SHAPE.
Claim 2
Independent Claim
97 words
THE METHOD OF DIE-FORGING ARTICLES FROM BLANKS OF NORMALLY RIGID MATERIAL WHICH COMPRISES PLACING A BLANK BETWEEN COMPLEMENTARY DIES, MOVING THE DIES INTO TIGHT CLAMPING ENGAGEMENT WITH THE BLANK TO PREVENT SHIFTING OF THE BLANK WITH RESPECT TO THE DIES WHEN THE DIES ARE STRUCK A HEAVY BLOW, AND WHILE THE DIES STILL CLAMP THE BLANK CAUSING A HEAVY MASS FALLING A SHORT DISTANCE TO IMPINGE UPON THE DIES WITH THE SAID MASS SO RELATED TO THE SAID DISTANCE THAT PRESSURE WAVE CURVE PRODUCED IS OF A WAVY TRAPEZOIDAL SHAPE AS DISTINGUISHED FROM A GENERALLY PARABOLIC SHAPE.
References Cited (Backward Citations)
US1275258A
Cited
US1440807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |