US3673624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension bridge
Assignee: Walter Bau AG
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Filing: 1970-08-18
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Granted: 1972-07-04
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Expires: 1990-08-18
Abstract
Abstract Wide span suspension bridge having a strengthening or reinforcing girder in the form of a streamlined solid walled box girder, which box girder is suspended by vertical trusses or supports from a supporting cable disposed in the vertical central plane of the bridge with which supports it is articulately connected.
Inventors
- 👤 Ulrich Finsterwalder
- 👤 Klemens Finsterwalder
- 👤 Hans Stefaniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:04
CPC Classifications
E; E01; E01D; E01D11/00; E01D11/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
192 words
Wide span suspension bridge having a streamlined stiffening girder in the form of a box girder having solid walls, a supporting or carrying cable disposed generally centrally of the bridge, vertically disposed suspension elements each suspended at one end from said cable and supporting said girder at the other end, articulated connections between the other ends of said suspension elements and said girder, pylons supporting said cable, said pylons being generally A-shaped and having struts on both sides of said girder and being made of steel embedded in concrete, anchoring or retaining cables extending rearwardly of said pylons and being anchored in the ground at the shorelines, said anchoring cables being disposed at angles steeper than the projection of the carrying cable relative to the vertical central plane of the bridge, preferably less than 45* with respect to the horizontal, said carrying cable and said anchoring cables being in the form of tensioning members placed closely together and embedded in concrete, said tensioning members crossing over one another and being anchored in the heads of said pylons, and a bending and torsion absorbing connection extending between said stiffening girder and each pylon.
Claim 2
Dependent Claim
192 words
Wide span suspension bridge having a streamlined stiffening girder in the form of a box girder having solid walls, a supporting or carrying cable disposed generally centrally of the bridge, vertically disposed suspension elements each suspended at one end from said cable and supporting said girder at the other end, articulated connections between the other ends of said suspension elements and said girder, pylons supporting said cable, said pylons being generally A-shaped and having struts on both sides of said girder and being made of steel embedded in concrete, anchoring or retaining cables extending rearwardly of said pylons and being anchored in the ground at the shorelines, said anchoring cables being disposed at angles steeper than the projection of the carrying cable relative to the vertical central plane of the bridge, preferably less than 45* with respect to the horizontal, said carrying cable and said anchoring cables being in the form of tensioning members placed closely together and embedded in concrete, said tensioning members crossing over one another and being anchored in the heads of said pylons, and a bending and torsion absorbing connection extending between said stiffening girder and each pylon.
Claim 3
Dependent Claim
111 words
Suspension bridge in accordance with claim 1, where said stiffening girder has an upper and a lower cover plate extending parallel to one another and side walls extending obliquely outwardly, said side walls being buckled inwardly proximate the upper regions thereof to form a continuous edge, a ledge extending outwardly from each said edge each defining an outer edge, and vertical bands disposed along the outer edges of said ledges and having outer borders, said bands having perforations proximate said outer borders of greater permeability and perforations of less permeability along their inner areas proximate said ledges for air whirls breaking in the areas of the edges of said stiffening girder.
Claim 4
Dependent Claim
23 words
Suspension bridge in accordance with claim 2, where said bands are connected with said ledges substantially at the center axes of said bands.
Claim 5
Dependent Claim
24 words
Suspension bridge in accordance with claim 2, where the width of said bands is approximately one-half the height or thickness of said stiffening girder.
Claim 6
Dependent Claim
35 words
Suspension bridge in accordance with claim 2, comprising a runway on top of said girder and where the upper borders of said bands are disposed substantially in the plane of the top of said runway.
Claim 7
Dependent Claim
22 words
Suspension bridge in accordance with claim 1, including two anchoring cables extending generally in the oblique planes defined by said pylon struts.
Claim 8
Dependent Claim
23 words
Suspension bridge in accordance with claim 1, where said supporting cable is made of higher quality steel than said anchoring or retaining cables.
References Cited (Backward Citations)
DE1176170B
Cited
US3132363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |