US3820832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchoring device for wire strands in prestressed concrete structures
Assignee: Individual
•
Filing: 1971-05-10
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Granted: 1974-06-28
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Expires: 1991-05-10
Abstract
Abstract AN ANCHORING DEVICE FOR WIRE STRANDS IN PRESTRESSED CONCRETE STRUCTURES WHEREIN THE END OF THE WIRE STRANDS IS UPSET TO THE SHAPE OF A HEAD AND THE END PORTION OF THE STRAND TOGETHER WITH THE HEAD IS SUPPORTED ON THE CONCRETE STRUCTURE BY MEANS OF A CLAMPING SUPPORT INSERTED IN A CONICAL RECESS. THE CONICAL RECESS IS PROVIDED IN AN ANCHOR BODY EMBEDDED IN THE CONCRETE STRUCTURE AND THE CLAMPING SUPPORT IS FORMED AS A MULTIPART WEDGING MEMBER SUPPORTING SAID HEAD AND INSERTED BETWEEN THE END PORTION OF THE STRAND AND THE CONICAL WALL OF SAID RECESS TO EXERT PRESSURE ON THE END PORTION OF THE STRAND.
Inventors
- 👤 A Brandestini
- 👤 H Siegwart
- 👤 R Kaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:36
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08; E04C5/12; E04C5/122; F; F16; F16G; F16G11/00; F16G11/04; F16G11/044; F16G11/048; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3909; Y10T24/398; Y10T403/00; Y10T403/16; Y10T403/29; Y10T403/70; Y10T403/7047; Y10T403/7051; Y10T403/7052; Y10T403/7062; Y10T403/7064; Y10T403/7066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |