Patent US3172450A successfully refreshed from Google Patents.
US3172450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stretch bending machine and method
Assignee: Motors Liquidation Co
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Filing: 1961-09-28
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Granted: 1965-03-09
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Expires: 1981-09-28
Abstract
No abstract record available.
Inventors
- 👤 Elroy S Hockman
- 👤 Weidmann Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:09
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/74; B21D11/00; B21D11/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
THE METHOD OF FORMING SUCCESSIVE ELONGATED BENT WORKPIECES HAVING A DESIRED CROSS-SECTION, COMPRISING PULLING A STRIP OF STOCK OF OTHER THAN SAID DESIRED CROSSSECTION BETWEEN TWO MEMBERS COOPERAABLE IN RESPONSE TO MOVEMENT OF SAID STRIP THEREBETWEEN TO ALTER THE CROSSSECTION OF THE STRIP TO SAID DESIRED CROSS-SECTION, APPLYING SUFFICIENT FORCE TO SAID STRIP IN OPPOSITION TO SAID MOVEMENT TO STRESS SAID DESIRED CROSS-SECTION TO SUBSTANTIALLY ITS ELASTIC LIMIT IN TENSION, BENDING SUCCESSIVE PORTIONS OF STRIP WHICH HAVE PASSED BETWEEN SAID MEMBERS AND WHILE THEY ARE UNDER SAID TENSION TO SUBSTANTIALLY THEIR FINAL CONFIGURATION, AND THEN RELIEVING THE SUCCESESIVE BENT PORTIONS OF SAID TENSION AND SEVERING THEM FROM THE STRIP.
Claim 2
Independent Claim
109 words
THE METHOD OF FORMING SUCCESSIVE ELONGATED BENT WORKPIECES HAVING A DESIRED CROSS-SECTION, COMPRISING PULLING A STRIP OF STOCK OF OTHER THAN SAID DESIRED CROSSSECTION BETWEEN TWO MEMBERS COOPERAABLE IN RESPONSE TO MOVEMENT OF SAID STRIP THEREBETWEEN TO ALTER THE CROSSSECTION OF THE STRIP TO SAID DESIRED CROSS-SECTION, APPLYING SUFFICIENT FORCE TO SAID STRIP IN OPPOSITION TO SAID MOVEMENT TO STRESS SAID DESIRED CROSS-SECTION TO SUBSTANTIALLY ITS ELASTIC LIMIT IN TENSION, BENDING SUCCESSIVE PORTIONS OF STRIP WHICH HAVE PASSED BETWEEN SAID MEMBERS AND WHILE THEY ARE UNDER SAID TENSION TO SUBSTANTIALLY THEIR FINAL CONFIGURATION, AND THEN RELIEVING THE SUCCESESIVE BENT PORTIONS OF SAID TENSION AND SEVERING THEM FROM THE STRIP.
Claim 3
Dependent Claim
227 words
APPARATUS FOR FORMING ELONGATED BENT WORKPIECES HAVING A DESIRED CROSS-SECTION, COMPRISING DIE MEANS HAVING SURFACES ADAPTED TO COACT UPON PASSAGE OF A STRIP OF STOCK OF PREDETERMINED CROSS-SECTION THEREBETWEEN TO ALTER SAID PREDETERMINED CROSS-SECTION TO SAID DESIRED CROSS-SECTION AND TO OPPOSITE SAID STRIP BEING PULLED THEREBETWEEN WITH A FORCE STRESSING SAID DESIRED CROSS-SECTION TO A VALUE INTERMEDIATE ITS ELASTIC AND ULTIMATE TENSILE LIMITS, A ROTATABLE MEMBER HAVING A SURFACE EXTENDING THEREAROUND FOR BENDING SAID STRIP AFTER PASSAGE BETWEEN SAID DIE SURFACES, MEANS JOURNALING SAID MEMBER FOR ROTATION INCLUDING A FIXED SUPPORT, STRIP ATTACHING MEANS CARRIED BY SAID MEMBER AND MOVABLE THEREON BETWEEN A POSITION ATTACHING THE STRIP TO SAID BENDING SURFACE FOR ROTATION WITH SAID MEMBER AND A RELEASED POSITION, MEANS LOCATED ON SAID SUPPORT AND OPERATIVE IN RESPONSE TO ROTATION OF SAID MEMBER TO A PRESELECTED POSITION TO MOVE SAID ATTACHING MEANS TO ITS STRIP ATTACHING POSITION, STRIP SEVERING MEANS LOCATED ON SAID MEMBER, MEANS LOCATED ON SAID SUPPORT AND OPERATIVE IN RESPONSE TO FURTHER ROTATION OF SAID MEMBER A PREDETERMINED EXTENT BEYOND SAID PRESELECTED POSITION TO ACTUATE SAID SEVERING MEANS TO SEVER THE BENT WORKPIECE FROM THE STRIP, MEANS LOCATED ON SAID SUPPORT AND OPERATIVE IN RESPONSE TO ROTATION OF SAID MEMBER A FURTHER PREDETERMINED EXTENT BEYOND SAID PRESELECTED POSITION TO MOVE SAID ATTACHING MEANS TO ITS RELEASED POSITION, AND MEANS FOR ROTATING SAID MEMBER.
Claim 4
Dependent Claim
227 words
APPARATUS FOR FORMING ELONGATED BENT WORKPIECES HAVING A DESIRED CROSS-SECTION, COMPRISING DIE MEANS HAVING SURFACES ADAPTED TO COACT UPON PASSAGE OF A STRIP OF STOCK OF PREDETERMINED CROSS-SECTION THEREBETWEEN TO ALTER SAID PREDETERMINED CROSS-SECTION TO SAID DESIRED CROSS-SECTION AND TO OPPOSITE SAID STRIP BEING PULLED THEREBETWEEN WITH A FORCE STRESSING SAID DESIRED CROSS-SECTION TO A VALUE INTERMEDIATE ITS ELASTIC AND ULTIMATE TENSILE LIMITS, A ROTATABLE MEMBER HAVING A SURFACE EXTENDING THEREAROUND FOR BENDING SAID STRIP AFTER PASSAGE BETWEEN SAID DIE SURFACES, MEANS JOURNALING SAID MEMBER FOR ROTATION INCLUDING A FIXED SUPPORT, STRIP ATTACHING MEANS CARRIED BY SAID MEMBER AND MOVABLE THEREON BETWEEN A POSITION ATTACHING THE STRIP TO SAID BENDING SURFACE FOR ROTATION WITH SAID MEMBER AND A RELEASED POSITION, MEANS LOCATED ON SAID SUPPORT AND OPERATIVE IN RESPONSE TO ROTATION OF SAID MEMBER TO A PRESELECTED POSITION TO MOVE SAID ATTACHING MEANS TO ITS STRIP ATTACHING POSITION, STRIP SEVERING MEANS LOCATED ON SAID MEMBER, MEANS LOCATED ON SAID SUPPORT AND OPERATIVE IN RESPONSE TO FURTHER ROTATION OF SAID MEMBER A PREDETERMINED EXTENT BEYOND SAID PRESELECTED POSITION TO ACTUATE SAID SEVERING MEANS TO SEVER THE BENT WORKPIECE FROM THE STRIP, MEANS LOCATED ON SAID SUPPORT AND OPERATIVE IN RESPONSE TO ROTATION OF SAID MEMBER A FURTHER PREDETERMINED EXTENT BEYOND SAID PRESELECTED POSITION TO MOVE SAID ATTACHING MEANS TO ITS RELEASED POSITION, AND MEANS FOR ROTATING SAID MEMBER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |