US4050538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise reducing screen
Assignee: D ETUDES GENERALES DE COMMUNICATIONS INDUSTRIELLES ET CIVIL Ste
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Filing: 1975-06-05
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Granted: 1977-09-27
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Expires: 1995-06-05
Abstract
Abstract Noise reducing screen disposed between an elongated noise source formed by a motorway or a railway and a building located along one side of this noise source and to be shielded therefrom. This noise reducing screen comprises a continuous wall portion having a whole length 2d, built up between the elongated noise source and the building on both sides of a perpendicular drawn from the building point the most remote from the noise source and located at a distance D therefrom to the elongated noise source and a plurality of variably spaced apart posts aligned with said wall portion, these posts having a length a and a width b repectively parallel and perpendicular to the elongated source, the spacing between the n th and (n-1) th post being at most equal to dp.sup.n + (a-d)p.sup.n-1 with n≦2 (and dp or n=1) Where p is the ratio D/(D-b) It results from this spacing that all rectilinear noise propagation paths from the noise source to the building are intercepted by the posts.
Inventors
- 👤 Andre L. Desenfant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:51
CPC Classifications
E; E01; E01F; E01F8/00; E01F8/0005; E01F8/0047; E01F8/0064; E01F8/007
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
181 words
A noise reducing screen disposed between an elongated noise source and a building having a continuous wall portion to be shielded from the noice source and located along one side of the elongated noise source; said noise reducing screen comprising: a continuous wall portion having a whole length 2d which is built up between said elongated noise source and said building on both sides of a perpendicular drawn from the building point which is the most remote from the noise source and is located at a distance D therefrom to said elongated noise source; a plurality of variably spaced apart posts aligned with said wall portion; said posts having a length a and a width b respectively parallel and perpendicular to said elongated source; the spacing between the n th and (n-1) th post being at most equal to dp n + (a-d)p n-1 with n ≦ 2 (and n=1:dp) where p is the ratio D/(D-b); whereby all rectilinear noise propagation paths from said noise source to said building are intercepted by said posts; and noise absorbent means on said posts.
Claim 2
Dependent Claim
181 words
A noise reducing screen disposed between an elongated noise source and a building having a continuous wall portion to be shielded from the noice source and located along one side of the elongated noise source; said noise reducing screen comprising: a continuous wall portion having a whole length 2d which is built up between said elongated noise source and said building on both sides of a perpendicular drawn from the building point which is the most remote from the noise source and is located at a distance D therefrom to said elongated noise source; a plurality of variably spaced apart posts aligned with said wall portion; said posts having a length a and a width b respectively parallel and perpendicular to said elongated source; the spacing between the n th and (n-1) th post being at most equal to dp n + (a-d)p n-1 with n ≦ 2 (and n=1:dp) where p is the ratio D/(D-b); whereby all rectilinear noise propagation paths from said noise source to said building are intercepted by said posts; and noise absorbent means on said posts.
Claim 3
Dependent Claim
37 words
A noise reducing screen as set forth in claim 1, in which the absorbent means for said posts constitutes layers of noise absorbent material along at least one vertical side thereof perpendicular to said elongated noise source.
Claim 4
Dependent Claim
208 words
A noise reducing screen disposed between and elongated noise source and a building having a continuous wall portion to be shielded from the noise source and located along one side of the elongated noise source; said noise reducing screen comprising: a continuous tunnel portion having a whole length 2d enclosing a portion of said elongated noise source; said tunnel portion built up on both sides of a perpendicular drawn from the building which is the most remote from the noise source and is located at a distance D therefrom to said elongated noise source; a plurality of variably spaced apart gantries each comprising two posts and a beam aligned with said tunnel portion and perpendicular to said elongated noise source; the posts and the beams of said gantries having a length a and and width b respectively parallel and perpendicular to said elongated noise source; the spacing between the n th and (n-1) th gantries being at most equal to dp n + (a-d)p n-1 with n ≦ 2 (and n=1:dp) where p is the ratio D/(D-b); whereby all rectilinear noise propagation path from said noise source to said building are intercepted by the posts and the beams of said gantries; and noise absorbent means on said gantries.
Claim 5
Dependent Claim
208 words
A noise reducing screen disposed between and elongated noise source and a building having a continuous wall portion to be shielded from the noise source and located along one side of the elongated noise source; said noise reducing screen comprising: a continuous tunnel portion having a whole length 2d enclosing a portion of said elongated noise source; said tunnel portion built up on both sides of a perpendicular drawn from the building which is the most remote from the noise source and is located at a distance D therefrom to said elongated noise source; a plurality of variably spaced apart gantries each comprising two posts and a beam aligned with said tunnel portion and perpendicular to said elongated noise source; the posts and the beams of said gantries having a length a and and width b respectively parallel and perpendicular to said elongated noise source; the spacing between the n th and (n-1) th gantries being at most equal to dp n + (a-d)p n-1 with n ≦ 2 (and n=1:dp) where p is the ratio D/(D-b); whereby all rectilinear noise propagation path from said noise source to said building are intercepted by the posts and the beams of said gantries; and noise absorbent means on said gantries.
Claim 6
Dependent Claim
44 words
A noise reducing screen as set forth in claim 3, in which said noise absorbent material for the posts and the beams of the gantries is formed of layers of noise absorbent material along at least their faces perpendicular to said elongated noise source.
References Cited (Backward Citations)
US3630310A
Cited
US3656576A
Cited
US3812931A
Cited
US3783968A
Cited
NL7400436A
Cited
US4015682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |