US3107716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gripping heads for sheet-stretching machines
Assignee: Schloemann AG
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Filing: 1960-11-04
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Granted: 1963-10-22
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Expires: 1980-11-04
Abstract
No abstract record available.
Inventors
- 👤 Wehmeyer Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:22
CPC Classifications
B; B21; B21D; B21D25/00; B21D25/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
A GRIPPING HEAD FOR A SHEET-METAL STRETCHING MACHINE, COMPRISING: A GRIPPING-HEAD FRAME, TWO CLAMPING BEAMS ROCKABLY JOURNALLED IN THE GRIPPING-HEAD FRAME, TWO CLAMPING-JAW CARRIERS EACH ROCKABLY JOURNALLED IN ONE OF THE CLAMPING BEAMS TWO CLAMPING JAWS, EACH CARRIED BY ONE OF THE CLAMPING-JAW CARRIERS, AND EACH EXTENDING OVER THE ENTIRE BREADTH OF THE WIDEST SHEET TO BE STRETCHED, TWO INNER SUPPORTING SHACKLES, EACH PIVOTALLY MOUNTED BY ONE END ON THE GRIPPING-HEAD FRAME, TWO INTERMEDIATE SHACKLES, EACH PIVOTALLY CONNECTED BY ONE END WITH THE FREE END OF ONE OF THE INNER SUPPORTING SHACKLES AND BY THE OTHER END WITH AN ASSOCIATED CLAMPING-JAW CARRIER AT ITS AXIS, THE LENGTH AND INCLINATION OF EACH INNER SUPPORTING SHACKLE BETWEEN ITS PIVOTAL POINTS BEING EQUAL TO THE LENGTH AND INCLINATION OF THE DISTANCE BETWEEN THE AXES OF THE BEARINGS OF ITS ASSOCIATED CLAMPING-JAW CARRIER IN THE CLAMPING BEAM AND OF THE CLAMPING BEAM IN THE GRIPPING HEAD, SO AS TO FORM A PARALLELOGRAM GUIDE FOR THE ASSOCIATED CLAMPING-JAW, AND MEANS FOR SWINGING THE PARALLELOGRAM GUIDES SO AS TO GRIP THE SHEET FIRMLY BETWEEN THE CLAMPING-JAWS AND TO RELEASE IT WHEN REQUIRED.
Claim 2
Dependent Claim
186 words
A GRIPPING HEAD FOR A SHEET-METAL STRETCHING MACHINE, COMPRISING: A GRIPPING-HEAD FRAME, TWO CLAMPING BEAMS ROCKABLY JOURNALLED IN THE GRIPPING-HEAD FRAME, TWO CLAMPING-JAW CARRIERS EACH ROCKABLY JOURNALLED IN ONE OF THE CLAMPING BEAMS TWO CLAMPING JAWS, EACH CARRIED BY ONE OF THE CLAMPING-JAW CARRIERS, AND EACH EXTENDING OVER THE ENTIRE BREADTH OF THE WIDEST SHEET TO BE STRETCHED, TWO INNER SUPPORTING SHACKLES, EACH PIVOTALLY MOUNTED BY ONE END ON THE GRIPPING-HEAD FRAME, TWO INTERMEDIATE SHACKLES, EACH PIVOTALLY CONNECTED BY ONE END WITH THE FREE END OF ONE OF THE INNER SUPPORTING SHACKLES AND BY THE OTHER END WITH AN ASSOCIATED CLAMPING-JAW CARRIER AT ITS AXIS, THE LENGTH AND INCLINATION OF EACH INNER SUPPORTING SHACKLE BETWEEN ITS PIVOTAL POINTS BEING EQUAL TO THE LENGTH AND INCLINATION OF THE DISTANCE BETWEEN THE AXES OF THE BEARINGS OF ITS ASSOCIATED CLAMPING-JAW CARRIER IN THE CLAMPING BEAM AND OF THE CLAMPING BEAM IN THE GRIPPING HEAD, SO AS TO FORM A PARALLELOGRAM GUIDE FOR THE ASSOCIATED CLAMPING-JAW, AND MEANS FOR SWINGING THE PARALLELOGRAM GUIDES SO AS TO GRIP THE SHEET FIRMLY BETWEEN THE CLAMPING-JAWS AND TO RELEASE IT WHEN REQUIRED.
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) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |