US3930349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braced girder of triangular section
Assignee: RHEINISCHE FILIGRANBAU GmbH AND CO KG
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Filing: 1974-06-11
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Granted: 1976-01-06
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Expires: 1994-06-11
Abstract
Abstract A braced girder for steel-reinforced concrete construction, comprising a top chord connection to two bottom chords by a continuous lacing which forms a repeating pattern consisting of braces which are at least roughly perpendicular to the top chord, and of diagonal braces. At least two braces in the continuous lacing are perpendicular to the chord and follow each other consecutively. The girder has a triangular cross section. Where the two panel planes meet, the lacing forms a radius which is at least 0.4 times the diameter of the top chord. A method and apparatus for preparing such a girder are also disclosed.
Inventors
- 👤 Hartmut Wellershaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:32
CPC Classifications
B; B21; B21F; B21F27/00; B21F27/12; B21F27/20; E; E04; E04C; E04C5/00; E04C5/01; E04C5/06; E04C5/065
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
A braced girder for steel-reinforced concrete construction having a triangular cross section between a top chord and two relatively spaced bottom chords, the top chord being connected to both bottom chords by one continuous lacing forming a repeating pattern of braces which are at least roughly perpendicular to the top chord and of diagonal braces, wherein two braces in the continuous lacing which are perpendicular to the top chord follow each other consecutively.
Claim 2
Dependent Claim
73 words
A braced girder for steel-reinforced concrete construction having a triangular cross section between a top chord and two relatively spaced bottom chords, the top chord being connected to both bottom chords by one continuous lacing forming a repeating pattern of braces which are at least roughly perpendicular to the top chord and of diagonal braces, wherein two braces in the continuous lacing which are perpendicular to the top chord follow each other consecutively.
Claim 3
Dependent Claim
44 words
A braced girder according to claim 1, wherein each brace perpendicularly connecting one bottom chord to the top chord is adjoined by another brace perpendicularly connecting the top chord to the other bottom chord, said other brace being adjoined by two consecutive diagonal braces.
Claim 4
Dependent Claim
34 words
A braced girder according to claim 1, characterised in that the braces (16c, 16'c) extending perpendicularly to the top chord (12) form directly adjacent pairs between the top chord and the same bottom chord.
Claim 5
Dependent Claim
111 words
A braced girder for steel-reinforced concrete construction, comprising a top chord (12) connected to each of two bottom chords (14, 14') by substantially straight braces forming parts of one continuous lacing contained in each of two panel planes meeting at least approximately in the axis of the top chord, said continuous lacing comprising a repeating pattern consisting of braces (16c, 16'c) which are at least approximately perpendicular to the top chord (12) and which follow each other consecutively, and of diagonal braces, and where the two panel planes (18, 18') meet, the lacing forms a radius (r) which is at least 0.4 times the diameter (d) of the top chord (12).
Claim 6
Dependent Claim
111 words
A braced girder for steel-reinforced concrete construction, comprising a top chord (12) connected to each of two bottom chords (14, 14') by substantially straight braces forming parts of one continuous lacing contained in each of two panel planes meeting at least approximately in the axis of the top chord, said continuous lacing comprising a repeating pattern consisting of braces (16c, 16'c) which are at least approximately perpendicular to the top chord (12) and which follow each other consecutively, and of diagonal braces, and where the two panel planes (18, 18') meet, the lacing forms a radius (r) which is at least 0.4 times the diameter (d) of the top chord (12).
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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |