US3738447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free-standing lead sound barriers
Assignee: St Joe Minerals Corp
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Filing: 1969-02-04
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Granted: 1973-06-12
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Expires: 1989-02-04
Abstract
Abstract A barrier for attenuating sound in accordance with this invention comprises a rigid frame member having a plurality of channel members, which may be made of dispersion strengthened lead, mounted on it to form a plurality of sub-frames. Sheets of free-standing, dispersion strengthened, creep-resistant lead are carried in the subframes by the channel members and may be embossed to add to their rigidity. One face of the sheets may be roughened in order to disperse reflected sound waves. According to another preferred embodiment of the invention, the channel members may be secured to the frame member by lead bolts in order to reduce the leakage of sound across the barrier.
Inventors
- 👤 M Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:23
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04B2001/8263; E04B2001/8414; E04B2001/8423; E04B2001/8452
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
87 words
A sound barrier for apparatus that generates undesirable sound, comprising a main frame for the barrier, said frame having a plurality of spaced members, an auxiliary frame comprising a grid of support members, the support members being secured to said main frame, and a plurality of relatively thin panels of lead, said support members providing means for supporting the lead panels in edge-to-edge relationship, said support members holding marginal portions of the lead panels whereby the lead panels are mounted within said auxiliary frame by their edges.
Claim 2
Dependent Claim
87 words
A sound barrier for apparatus that generates undesirable sound, comprising a main frame for the barrier, said frame having a plurality of spaced members, an auxiliary frame comprising a grid of support members, the support members being secured to said main frame, and a plurality of relatively thin panels of lead, said support members providing means for supporting the lead panels in edge-to-edge relationship, said support members holding marginal portions of the lead panels whereby the lead panels are mounted within said auxiliary frame by their edges.
Claim 3
Dependent Claim
21 words
A sound barrier as set forth in claim 1 wherein the lead has a tensile strength of at least 3,200 p.s.i.
Claim 4
Dependent Claim
24 words
A sound barrier as set forth in claim 1 wherein the lead has a tensile strength in the range of 5,000 to 7,000 p.s.i.
Claim 5
Dependent Claim
24 words
A sound barrier as set forth in claim 1 wherein the panel is stressed under its own weight to between 200 to 2,000 p.s.i.
Claim 6
Dependent Claim
24 words
A sound barrier as set forth in claim 1 wherein the panel is stressed under its own weight to between 500 to 1,000 p.s.i.
Claim 7
Dependent Claim
28 words
A sound barrier as set forth in claim 1 wherein one face of at least one of the panels is roughened so as to disperse reflected sound waves.
Claim 8
Dependent Claim
14 words
A sound barrier as set forth in claim 1 wherein said panels are embossed.
Claim 9
Dependent Claim
27 words
A sound barrier as set forth in claim 1 wherein said main frame forms a grid substantially in registry with the grid constituted by said support members.
Claim 10
Dependent Claim
22 words
A sound barrier as set forth in claim 8 wherein said main frame includes means for mounting the barrier to said apparatus.
Claim 11
Dependent Claim
15 words
A sound barrier as set forth in claim 1 wherein said panels comprise strengthened lead.
Claim 12
Dependent Claim
26 words
A sound barrier as set forth in claim 10 wherein said panels comprise dispersion-strengthened lead containing lead oxide in the range of 0.7 to 16.0 percent.
Claim 13
Dependent Claim
27 words
A sound barrier as set forth in claim 11 wherein said support members comprise dispersion-strengthened lead containing lead oxide in the range of 0.7 to 16.0 percent.
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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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |