US3208255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for hydraulic deep-drawing of sheet material
Assignee: SEG Hausgeraete GmbH
•
Filing: 1962-07-03
•
Granted: 1965-09-28
•
Expires: 1982-07-03
Abstract
No abstract record available.
Inventors
- 👤 Burk Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:35
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/20; B21D22/203; B21D22/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A METHOD FOR HYDRAULIC DEEP-DRAWING OF A WORKPIECE OF SHEET MATERIAL, COMPRISING RESTING A BLANK WORKPIECE OF PLANAR SHEET MATERIAL TO BE DEFORMED ON A HOLLOW RESILIENT SEALING GASKET PROJECTING ABOVE AND SURROUNDING THE UPPER EDGE OF A CONTAINER OF LIQUID IN AN ENCLOSED SPACE SO THAT SAID BLANK FORMS AN UPPER CLOSURE FOR SAID ENCLOSED SPACE, HOLDING SAID BLANK TIGHTLY AGAINST SAID GASKET TO SEAL OFF SAID SPACE PRESSURE-TIGHT, PRESSING A PUNCH AGAINST ONE SURFACE OF SAID WORKPIECE TO FORCE IT AGAINST SAID GASKET AND DRAW THE WORKPIECE ACROSS SAID CONTAINER EDGE, SIMULTANEOUSLY TRANSMITTING THE PRESSURE APPLIED BY SAID WORKPIECE AGAINST SAID GASKET FROM THE LATTER TO SAID LIQUID IN SAID ENCLOSED SPACE, AND SIMULTANEOUSLY RESISTING THE PUNCH PRESSURE BY FORCING SAID LIQUID DIRECTLY AGAINST AND IN CONTACT WITH THE OPPOSING SURFACE TO THE WORKPIECE SO THAT WHILE THE BLANK IS DRAWN ACROSS SAID CONTAINER EDGE SAID OPPOSING SURFACE IN CONTACT WITH SAID GASKET MAINTAINS SAID SPACE PRESSURE-TIGHT WHILE SAID BLANK IS BEING DEFORMED BY SAID PUNCH.
Claim 2
Independent Claim
168 words
A METHOD FOR HYDRAULIC DEEP-DRAWING OF A WORKPIECE OF SHEET MATERIAL, COMPRISING RESTING A BLANK WORKPIECE OF PLANAR SHEET MATERIAL TO BE DEFORMED ON A HOLLOW RESILIENT SEALING GASKET PROJECTING ABOVE AND SURROUNDING THE UPPER EDGE OF A CONTAINER OF LIQUID IN AN ENCLOSED SPACE SO THAT SAID BLANK FORMS AN UPPER CLOSURE FOR SAID ENCLOSED SPACE, HOLDING SAID BLANK TIGHTLY AGAINST SAID GASKET TO SEAL OFF SAID SPACE PRESSURE-TIGHT, PRESSING A PUNCH AGAINST ONE SURFACE OF SAID WORKPIECE TO FORCE IT AGAINST SAID GASKET AND DRAW THE WORKPIECE ACROSS SAID CONTAINER EDGE, SIMULTANEOUSLY TRANSMITTING THE PRESSURE APPLIED BY SAID WORKPIECE AGAINST SAID GASKET FROM THE LATTER TO SAID LIQUID IN SAID ENCLOSED SPACE, AND SIMULTANEOUSLY RESISTING THE PUNCH PRESSURE BY FORCING SAID LIQUID DIRECTLY AGAINST AND IN CONTACT WITH THE OPPOSING SURFACE TO THE WORKPIECE SO THAT WHILE THE BLANK IS DRAWN ACROSS SAID CONTAINER EDGE SAID OPPOSING SURFACE IN CONTACT WITH SAID GASKET MAINTAINS SAID SPACE PRESSURE-TIGHT WHILE SAID BLANK IS BEING DEFORMED BY SAID PUNCH.
References Cited (Backward Citations)
DE39159C
Cited
US2766711A
Cited
US2783727A
Cited
US2972971A
Cited
US3021802A
Cited
US2946303A
Cited
US2989019A
Cited
US3046923A
Cited
US3020633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |