Patent US3300922A successfully refreshed from Google Patents.
US3300922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchor assembly for prestressed concrete structures
Assignee: HEILMANN AND LITTMANN BAU AG
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Filing: 1964-06-09
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Granted: 1967-01-31
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Expires: 1984-06-09
Abstract
No abstract record available.
Inventors
- 👤 Buyer Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:26
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08; E04C5/12; E04C5/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
AN ANCHOR HEAD FOR WIRES TO BE PRE-STRESSED COMPRISING: A STRESSED CAST CONCRETE BODY HAVING AN OUTER SLEEVE AND A SOLID CENTRAL TENSION BOLT EXTENDING ALONG THE AXIS THEREOF, SAID TENSION BOLT HAVING A LONGITUDINAL CORRUGATED OUTER SURFACE; WIRE ENDS DISTRIBUTED AROUND SAID BOLT IN A RADIALLY SYMMETRICAL MANNER AND SHAPED TO CORRESPOND TO THE CORRUGATED SURFACE OF SAID BOLT, SAID WIRES BEING IN ENGAGEMENT WITH SAID BOLT; SAID BOLT AND WIRE ENDS BEING EMBEDDED IN THE CONCRETE MEMBER SO AS TO MAINTAIN AXIAL TENSILE FORCES AND TO FORCE THE WIRE ENDS AGAINST THE OUTER SURFACE OF THE CENTRAL BOLT.
Claim 2
Dependent Claim
100 words
AN ANCHOR HEAD FOR WIRES TO BE PRE-STRESSED COMPRISING: A STRESSED CAST CONCRETE BODY HAVING AN OUTER SLEEVE AND A SOLID CENTRAL TENSION BOLT EXTENDING ALONG THE AXIS THEREOF, SAID TENSION BOLT HAVING A LONGITUDINAL CORRUGATED OUTER SURFACE; WIRE ENDS DISTRIBUTED AROUND SAID BOLT IN A RADIALLY SYMMETRICAL MANNER AND SHAPED TO CORRESPOND TO THE CORRUGATED SURFACE OF SAID BOLT, SAID WIRES BEING IN ENGAGEMENT WITH SAID BOLT; SAID BOLT AND WIRE ENDS BEING EMBEDDED IN THE CONCRETE MEMBER SO AS TO MAINTAIN AXIAL TENSILE FORCES AND TO FORCE THE WIRE ENDS AGAINST THE OUTER SURFACE OF THE CENTRAL BOLT.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |