Patent US4224931A successfully refreshed from Google Patents.
Patent US3833404A successfully refreshed from Google Patents.
US3833404A
Expired / Lapsed
US
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Vibration or sound damping coating for vibratory structures
Assignee: Research Corp
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Filing: 1972-05-31
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Granted: 1974-09-03
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Expires: 1992-05-31
Abstract
Abstract Damping means for a vibratory part comprising an inner layer of visco-elastic polyblended material comprising an interpenetrating polymer networks composition consisting essentially of 5-95 percent by weight of an elastomer (e.g., polyethyl acrylate) and 95-5 percent by weight of a plastic (e.g., polystyrene, polymethylmethacrylate), applied to said part, and an outer plastic constraining layer applied over said viscoelastic material.
Inventors
- 👤 L Sperling
- 👤 D Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:52
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/168; F; F16; F16F; F16F1/00; F16F1/36; F16F1/366; Y; Y10; Y10S; Y10S525/00; Y10S525/903; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
13 words
The damping means of claim 1 wherein the elastomer is poly (ethyl acrylate).
Claim 2
Dependent Claim
17 words
The damping means of claim 1 wherein the plastic in said viscoelastic material is poly (methyl methacrylate).
Claim 3
Dependent Claim
15 words
The damping means of claim 1 wherein the plastic in said viscoelastic material is polystyrene.
Claim 4
Dependent Claim
24 words
The damping means of claim 1 wherein said inner layer of viscoelastic material is applied to said part in the form of a latex.
Claim 5
Dependent Claim
27 words
The damping means of claim 1 wherein said outer plastic layer comprises a plastic selected from the group consisting of polystyrene, poly (methyl methacrylate) and epoxy resins.
Claim 6
Dependent Claim
17 words
The damping means of claim 1 wherein said outer plastic constraining layer comprises a filler reinforced plastic.
Claim 7
Independent Claim
83 words
A method for damping a vibratory surface comprising adhering a layer of viscoelastic material to said surface and adhering over said layer of viscoelastic material a constraining layer of plastic; said viscoelastic material comprising a composition of interpenetrating polymer networks consisting essentially of 5-95 percent by weight of an elastomer having a Young''s modulus below 1 X 1010 dynes/cm2 and 95-5 percent by weight of a plastic having a Young''s modulus greater than 1 X 1010 dynes/cm2, said networks being essentially independently crosslinked.
Claim 8
Dependent Claim
13 words
The method of claim 8 wherein said layers are respectively adhered by coating.
Claim 9
Dependent Claim
12 words
The method of claim 8 wherein the elastomer is poly (ethyl acrylate).
Claim 10
Dependent Claim
23 words
The method claim 8 wherein the plastic in said viscoelastic material is selected from the group consisting of polystyrene and poly (methyl methacrylate).
Claim 11
Dependent Claim
28 words
The method of claim 8 wherein the plastic in said constraining layer of plastic is selected from the group consisting of polystyrene, poly (methyl methacrylate) and epoxy resins.
Claim 12
Dependent Claim
57 words
The method of claim 8 wherein said viscoelastic material is applied to said surface by coating thereon a layer of said crosslinked elastomer or plastic, swelling said layer with a coating of a monomer of the other of said elastomer or plastic and crosslinking agent and polymerizing said monomer to form said layer of interpenetrating polymer networks.
Claim 13
Dependent Claim
25 words
The method of claim 8 wherein said viscoelastic material is applied to said surface by coating thereon a latex of said interpenetrating polymer networks composition.
Claim 14
Dependent Claim
15 words
The method of claim 8 wherein said plastic constraining layer is a filler reinforced plastic.
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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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |