US4471924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast deflecting fence
Assignee: LFP-I A NEVADA LLC LLC
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Filing: 1982-07-12
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Granted: 1984-09-18
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Expires: 2002-07-12
Abstract
Abstract A blast deflecting fence having separate upper and lower deflecting surfaces which overlap. The lower deflecting surface is curved so that a jet blast directed towards it is deflected upwards. The upper deflecting surface is positioned so that lower portion of the upper surface overlaps the upper portion of the lower surface and is horizontally separated therefrom. The upper deflecting surface is inclined between 30° below the vertical and vertical so that jet blasts are directed upwards. End walls are provided perpendicular to the blast fence to constrain the lengthwise flow of exhaust gases.
Inventors
- 👤 B. Stanley Lynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:32
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
A blast deflecting fence, comprising a lower deflecting surface and an upper deflecting surface, braced by bracing means and anchored to a foundation, said lower deflecting surface being curved whereby a jet blast directed against said lower deflecting surface is deflected upwardly, said upper deflecting surface being uniformly flat and inclined between 30° below vertical and vertical, said upper deflecting surface being spaced apart from said lower deflecting surface, the upper edge of the lower deflecting surface overlapping the lower edge of the upper deflecting surface to thereby shield said bracing means, said upper edge of the lower deflecting surface being horizontally separated from said lower edge of the upper deflecting surface by a distance of not less than six inches and not more than thirty inches.
Claim 2
Dependent Claim
127 words
A blast deflecting fence, comprising a lower deflecting surface and an upper deflecting surface, braced by bracing means and anchored to a foundation, said lower deflecting surface being curved whereby a jet blast directed against said lower deflecting surface is deflected upwardly, said upper deflecting surface being uniformly flat and inclined between 30° below vertical and vertical, said upper deflecting surface being spaced apart from said lower deflecting surface, the upper edge of the lower deflecting surface overlapping the lower edge of the upper deflecting surface to thereby shield said bracing means, said upper edge of the lower deflecting surface being horizontally separated from said lower edge of the upper deflecting surface by a distance of not less than six inches and not more than thirty inches.
Claim 3
Dependent Claim
19 words
The blast fence of claim 1 wherein said upper and lower deflecting surfaces are comprised of corrugated sheet metal.
Claim 4
Dependent Claim
21 words
The blast fence of claim 1 wherein said bracing means comprise supporting struts attached to said upper and lower deflecting surfaces.
Claim 5
Dependent Claim
22 words
The blast fence of claim 1 wherein said upper and lower deflecting surfaces are comprised of doubled sheets of corrugated sheet metal.
Claim 6
Dependent Claim
20 words
The blast fence of claim 1 wherein said upper deflecting surface is inclined between 10° and 15° below the vertical.
Claim 7
Dependent Claim
148 words
A blast deflecting fence, comprising a lower deflecting surface and an upper deflecting surface braced by bracing means and anchored to a foundation, said lower deflecting surface being curved wherein a jet blast directed against said lower deflecting surface is deflected upwardly, said upper deflecting surface being uniformly flat and inclined between 30° below the vertical and vertical, said upper deflecting surface being spaced apart from and rearward of said lower deflecting surface, the upper edge of the lower deflecting surface overlapping the lower edge of the upper deflecting surface to thereby shield said bracing means, said upper edge of the lower deflecting surface being horizontally separated from said lower edge of the upper deflecting surface by a distance of not less than six inches and not more than thirty inches, and detached end walls disposed at the terminal ends of said blast deflecting fence and perpendicular thereto.
Claim 8
Dependent Claim
148 words
A blast deflecting fence, comprising a lower deflecting surface and an upper deflecting surface braced by bracing means and anchored to a foundation, said lower deflecting surface being curved wherein a jet blast directed against said lower deflecting surface is deflected upwardly, said upper deflecting surface being uniformly flat and inclined between 30° below the vertical and vertical, said upper deflecting surface being spaced apart from and rearward of said lower deflecting surface, the upper edge of the lower deflecting surface overlapping the lower edge of the upper deflecting surface to thereby shield said bracing means, said upper edge of the lower deflecting surface being horizontally separated from said lower edge of the upper deflecting surface by a distance of not less than six inches and not more than thirty inches, and detached end walls disposed at the terminal ends of said blast deflecting fence and perpendicular thereto.
References Cited (Backward Citations)
US2974910A
Cited
US3007539A
Cited
US3080937A
Cited
US3386528A
Cited
US3307809A
Cited
US3797787A
Cited
SU545515A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |