Patent US3803785A successfully refreshed from Google Patents.
US3803785A
Expired / Lapsed
US
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Anchoring means for tensioned member for heavy loads, for example, a slanted cable bridge
Assignee: Walter Bau AG
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Filing: 1972-03-24
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Granted: 1974-04-16
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Expires: 1992-03-24
Abstract
Abstract Anchorage for a tensioned tension member for heavy loads in a concrete structure component such as a slanting cable of a slanted cable bridge comprising a plurality of parallel tension members such as wires or litz, that are arranged together in a common cover and surrounded by cement mortar that fills the space of the cross section of the cover not occupied by the tension member and which are fanned out in the direction of the anchorage, where the cover extends into the concrete structural part and is defined by a metal casing at least in the entrance area into the concrete part, and which, besides being connected with the tension members, is connected with the concrete part.
Inventors
- 👤 U Finsterwalder
- 👤 K Finsterwalder
- 👤 R Buhrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:01
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08; E04C5/12; E04C5/125; E01; E01D; E01D19/00; E01D19/14; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3909
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
163 words
Anchorage for a stressed tension member for heavy loads in a part of a concrete structure, for example a slanted cable of a slanted cable bridge, comprising, in combination, a plurality of tension elements such as wires, litz or the like disposed parallel to one another, a common covering disposed around said elements, cement mortar or the like occupying the space of the cross-section in said covering not filled by said tension elements, said mortar or the like being introduced after tensioning of said elements, and said tension elements being fanned out in the direction of the anchorage and being individually anchored therein, said covering extending into said concrete structure part and comprising a metal casing in the area of entrance into said concrete structure part, said casing having a wall thickness that is constanT inside said concrete structure part and decreases outside said concrete structure part, and besides being connected with said tension elements being also connected with said concrete structure part.
Claim 2
Dependent Claim
163 words
Anchorage for a stressed tension member for heavy loads in a part of a concrete structure, for example a slanted cable of a slanted cable bridge, comprising, in combination, a plurality of tension elements such as wires, litz or the like disposed parallel to one another, a common covering disposed around said elements, cement mortar or the like occupying the space of the cross-section in said covering not filled by said tension elements, said mortar or the like being introduced after tensioning of said elements, and said tension elements being fanned out in the direction of the anchorage and being individually anchored therein, said covering extending into said concrete structure part and comprising a metal casing in the area of entrance into said concrete structure part, said casing having a wall thickness that is constanT inside said concrete structure part and decreases outside said concrete structure part, and besides being connected with said tension elements being also connected with said concrete structure part.
Claim 3
Dependent Claim
25 words
Anchorage in accordance with claim 1, where that part of said metal casing inside said concrete structure part is provided with means for increasing adhesion.
Claim 4
Dependent Claim
21 words
Anchorage in accordance with claim 2, where said means for adhesion are rivets provided on the wall of said metal casing.
Claim 5
Dependent Claim
54 words
Anchorage in accordance with claim 1 where said casing encloses perforated spacers for said tension elements enclosing a plurality of sleeves, each of which encompasses a tensioning element, said sleeves being connected with one another by bridges, and the inner diameter of said sleeves being greater than the outer diameter of said tension elements.
Claim 6
Dependent Claim
29 words
Anchorage in accordance with claim 4, where one of said sleeves, preferably the center sleeve, is provided with retaining means holding said sleeve on the tension element passing therethrough.
Claim 7
Dependent Claim
30 words
Anchorage in accordance with claim 5 where said retaining means are in the form of an internal thread on said sleeve and a corresponding external thread on said tension element.
Claim 8
Dependent Claim
27 words
Anchorage in accordance with claim 6 where said thread is of such length that it is adapted to be sheared off during tensioning of the tension element.
Claim 9
Dependent Claim
16 words
Anchorage in accordance with claim 1, comprising an anchoring ring having perforations encompassing said metal casing.
Claim 10
Dependent Claim
37 words
Anchorage in accordance with claim 8, comprising tensioning members disposed around said metal casing and extending parallel thereto and through the perforations in said anchoring ring for producing prestressing in the concrete disposed around said metal casing.
Claim 11
Dependent Claim
27 words
Anchorage in accordance with claim 9, where said covering is of metal, plastic such as polyethylene or the like, which is positively connected with said metal casing.
Claim 12
Dependent Claim
35 words
Anchorage in accordance with claim 10, comprising an anchoring body for each tension member embedded in said concrete structure part and sleeve tubes around said tensioning members extending between said casing and said anchoring members.
Claim 13
Dependent Claim
57 words
Anchorage in accordance with claim 11, including a perforated disk disposed inside said casing permitting passage of said tension elements, an end plate in said casing having apertures for said tension elements, said apertures extending around the ends of said sleeve tubes, said perforated disk and said end plate defining therebetween a chamber adapted to be injected.
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) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |