US3783968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound barrier
Assignee: Individual
•
Filing: 1972-12-29
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Granted: 1974-01-08
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Expires: 1992-12-29
Abstract
Abstract A sound barrier comprising a plurality of hollow, wedge-shaped, energy dissipating cells mounted in parallel, side-by-side, spaced relationship as inverse-acting acoustic horns, first sides of all cells being coplanar. Each of the cells has a plurality of openings in the remaining two sides thereof along the edges which are adjacent the first side and a plurality of elongated openings along the apex defined by the intersection of the two sides. Each cell is made in two interlocking parts, one part forming the first side and the other part forming the remaining two sides. Each part comprises a thin outer shell of structurally rigid material and an inner lining of sound deadening material, such as polyurethane closed cell foam.
Inventors
- 👤 C Derry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:02
CPC Classifications
E; E01; E01F; E01F8/00; E01F8/0005; E01F8/0047; E01F8/0052
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
145 words
A sound barrier comprising: a plurality of hollow, energy dissipating cells, each having a triangular cross-section, mounted in parallel, side-by-side, spaced relationship with first sides of all of said cells being coplanar or aligned with a continuous, arcuate surface and the remaining two sides of all of said cells extending in the same direction, towards a source of sound; each of said cells having a plurality of inlet openings in each of said remaining two sides thereof, said inlet openings being spaced along the edges of said two sides which are adjacent said first side; each of said cells further having at least one elongated outlet opening along the apex thereof defined by the intersection of said two sides, the combined area of said plurality of inlet openings in each cell being substantially greater than the area of said elongated outlet opening in each cell.
Claim 2
Dependent Claim
145 words
A sound barrier comprising: a plurality of hollow, energy dissipating cells, each having a triangular cross-section, mounted in parallel, side-by-side, spaced relationship with first sides of all of said cells being coplanar or aligned with a continuous, arcuate surface and the remaining two sides of all of said cells extending in the same direction, towards a source of sound; each of said cells having a plurality of inlet openings in each of said remaining two sides thereof, said inlet openings being spaced along the edges of said two sides which are adjacent said first side; each of said cells further having at least one elongated outlet opening along the apex thereof defined by the intersection of said two sides, the combined area of said plurality of inlet openings in each cell being substantially greater than the area of said elongated outlet opening in each cell.
Claim 3
Dependent Claim
24 words
A sound barrier according to claim 1 wherein the spacing between adjacent cells is substantially smaller than the width of said first sides thereof.
Claim 4
Dependent Claim
26 words
A sound barrier according to claim 1 wherein the lengths of said inlet openings are at least four times greater than the spacing between adjacent openings.
Claim 5
Dependent Claim
34 words
A sound barrier according to claim 1 wherein the combined area of said plurality of inlet openings in each cell is approximately ten times the area of said elongated outlet opening in each cell.
Claim 6
Dependent Claim
24 words
A sound barrier according to claim 4 wherein each of said cells has a plurality of said outlet openings spaced along said apex thereof.
Claim 7
Dependent Claim
29 words
A sound barrier according to claim 1 wherein each of said cells comprises: a thin outer shell of structurally rigid material and an inner lining of sound deadening material.
Claim 8
Dependent Claim
16 words
A sound barrier according to claim 6 wherein said outer shell is made from sheet metal.
Claim 9
Dependent Claim
15 words
A sound barrier according to claim 6 wherein said outer shell is made from aluminum.
Claim 10
Dependent Claim
17 words
A sound barrier according to claim 8 wherein said sound deadening material is polyurethane closed cell foam.
Claim 11
Dependent Claim
17 words
A sound barrier according to claim 6 wherein said sound deadening material is polyurethane closed cell foam.
Claim 12
Dependent Claim
55 words
A sound barrier according to claim 1 wherein each of said cells consists of two subassemblies, a first generally rectangular subAssembly from which said first side is formed and a second generally triangular subassembly from which said remaining two sides are formed, said first and second subassemblies including means for forming an interlocking connection therebetween.
Claim 13
Dependent Claim
29 words
A sound barrier according to claim 11 wherein each of said subassemblies comprises: a thin outer shell of structurally rigid material and an inner lining of sound deadening material.
Claim 14
Dependent Claim
127 words
A sound barrier according to claim 12 wherein said shell of said first subassembly comprises: a rectangular back portion; two perpendicular side portions; and first and second flanges which extend outwardly from said back portion, parallel to and spaced from said side portions to define narrow slots therebetween; and wherein said shell of said second subassembly comprises: a base portion which is bent through an angle of 120* at the exact center thereof to form said apex and said two remaining sides, the free ends of said sides being bent through angles of 30* so as to be parallel to each other, the spacing between said ends being exactly equal to the spacing between said slots in said first subassembly whereby said ends extend into said slots.
Claim 15
Dependent Claim
121 words
A sound barrier according to claim 13 wherein said means for forming an interlocking connection between said subassemblies comprises: a dog-leg in said flanges of said first subassembly; an outwardly projecting ear at each intersection between said sides and said ends of said second subassembly; and an inwardly projecting ear centrally located along each of said ends of said second subassembly, the distance between each outwardly projecting ear and each inwardly projecting ear being equal to the distance between said dog-legs and the ends of said flanges whereby said outwardly projecting ears rest on the ends of said side portions of said first subassembly and said inwardly projection ears are captured beneath said dog-legs in said flanges of said first subassembly.
Claim 16
Dependent Claim
26 words
A sound barrier according to claim 13 wherein said lining of sound deadening material of said first subassembly extends between said first and second flanges thereof.
Claim 17
Dependent Claim
81 words
A sound barrier according to claim 13 wherein said shell of said second subassembly further comprises: first and second flanges extending inwardly from the inner surfaces of said sides thereof, said flanges being coplanar and spaced from said ends of said sides by an amount which is slightly greater than the width of said inlet openings, said lining of sound deadening material of said second subassembly extending along the inner surfaces of said sides of said shell, between said flanges thereof.
Claim 18
Dependent Claim
36 words
A sound barrier according to claim 16 wherein said inlet openings extend between said first and second flanges and the adjacent ends of said sides of said base portion of said shell of said second subassembly.
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |