US3944018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical seal
Assignee: Individual
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Filing: 1974-08-01
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Granted: 1976-03-16
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Expires: 1994-08-01
Abstract
Abstract An acoustical ear muff arrangement having an identical acoustical sealing muff for each ear, the muffs being connected together by an adjustable spring wire structure for holding a muff over each ear. Each muff has a dish-shaped portion with elastomeric foamed material therein, and with a novel non-foamed elastomeric seal around the periphery of the dish-shaped portion. The non-foamed elastomeric seal has three lips extending from a base section. The lips have a tapering configuration and extend at angles within a critical range from the base section.
Inventors
- 👤 Rodney Jene Satory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:04
CPC Classifications
A; A61; A61F; A61F11/00; A61F11/06; A61F11/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
156 words
An acoustical seal comprising: an annular base lying generally in a first plane and having an inner and an outer periphery thereon; a first annular elastomeric lip connected to said inner periphery and extending inwardly and to one side of said plane at a first acute angle of between 45° and 65° with respect to said plane; a second annular elastomeric lip connected to said outer periphery and extending outwardly and to said one side of said plane at a second acute angle of between 45° and 65° with respect to said plane; a third annular elastomeric lip connected to said base between said first and second lips and extending outwardly and to one side of said plane at a third acute angle of between 45° and 65° with respect to said plane; and annular means attached to said base on the other side of said plane for acoustically sealing said base to a closure member.
Claim 2
Dependent Claim
156 words
An acoustical seal comprising: an annular base lying generally in a first plane and having an inner and an outer periphery thereon; a first annular elastomeric lip connected to said inner periphery and extending inwardly and to one side of said plane at a first acute angle of between 45° and 65° with respect to said plane; a second annular elastomeric lip connected to said outer periphery and extending outwardly and to said one side of said plane at a second acute angle of between 45° and 65° with respect to said plane; a third annular elastomeric lip connected to said base between said first and second lips and extending outwardly and to one side of said plane at a third acute angle of between 45° and 65° with respect to said plane; and annular means attached to said base on the other side of said plane for acoustically sealing said base to a closure member.
Claim 3
Dependent Claim
26 words
An acoustical seal as defined in claim 1 wherein said second lip extends further to said one side of the plane than does said first lip.
Claim 4
Dependent Claim
35 words
An acoustical seal as defined in claim 2 wherein the second acute angle of said second lip is 45° and the first and third acute angles of said first and third lips respectively are 60°.
Claim 5
Dependent Claim
27 words
Apparatus as defined in claim 1 wherein said closure member is dish-shaped and has a peripheral edge; said base member being sealingly attached to said peripheral edge.
Claim 6
Dependent Claim
18 words
Apparatus as defined in claim 4 wherein a foamed elastomeric mass is disposed within said dish-shaped closure member.
Claim 7
Dependent Claim
34 words
Apparatus as defined in claim 5 including means for holding said acoustical seal in abutment with a person's head and surrounding the person's ear to thereby prevent the transmission of noise to the ear.
Claim 8
Dependent Claim
23 words
Apparatus as defined in claim 4 wherein said annular means includes an annular groove, said peripheral edge being received in said annular groove.
Claim 9
Dependent Claim
16 words
Apparatus as defined in claim 7 wherein said peripheral edge includes a radially outwardly projecting ridge.
Claim 10
Dependent Claim
19 words
An acoustical seal as defined in claim 1 wherein said acoustical seal is contructed of a non-foamed elastomeric material.
Claim 11
Dependent Claim
47 words
An acoustical seal as defined in claim 1 wherein a first air space is formed between said first and third lips and a second air space is formed between said second and third lips, said first and second air spaces being void of anything other than air.
Claim 12
Dependent Claim
33 words
An acoustical seal as defined in claim 1 wherein said first, second and third lips have a tapering configuration, being thicker near the connection to the base than at the free ends thereof.
Claim 13
Dependent Claim
45 words
An acoustical seal as defined in claim 11 wherein said first and third annular lips have a length which is at least three times the average thickness thereof and said second annular lip has a length of at least five times the average thickness thereof.
Claim 14
Dependent Claim
18 words
The acoustical seal as defined in claim 1 wherein said acoustical seal is of one piece solid construction.
Claim 15
Dependent Claim
22 words
The acoustical seal as defined in claim 13 wherein said acoustical seal in constructed of polyvinylchloride substantially free of confined air pockets.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |