Patent US3621136A successfully refreshed from Google Patents.
US3661225A
Expired / Lapsed
US
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Ear-protecting device
Assignee: Sellstrom Manufacturing Co
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Filing: 1970-08-26
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Granted: 1972-05-09
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Expires: 1990-08-26
Abstract
Abstract An ear-protecting device is provided which is adapted to protect the wearer when disposed in an environment having a high and disturbing noise level. The device is provided with a manually controlled means whereby the wearer may with a simple manipulation vary the sound resistant characteristics of the device, when desired, to provide comfort for the wearer and/or in order to permit the wearer to engage in conversation with another without having to remove the device from its ear-protecting position.
Inventors
- 👤 Marshall N Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:19
CPC Classifications
A; A61; A61F; A61F11/00; A61F11/06; A61F11/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
92 words
An ear-protecting device comprising an outer member of sound resistant material; an inner member of sound resistant material, said outer and inner members cooperating to encompass an ear of the wearer; and adjustable means carried on the interior surface of said outer member whereby, when in one position of adjustment, the sound resistant characteristics of said outer member are substantially unaffected and, when in a second position of adjustment, the sound resistant characteristics of said outer member are substantially diminished; said adjustable means being biaseD to assume said one position of adjustment.
Claim 2
Dependent Claim
92 words
An ear-protecting device comprising an outer member of sound resistant material; an inner member of sound resistant material, said outer and inner members cooperating to encompass an ear of the wearer; and adjustable means carried on the interior surface of said outer member whereby, when in one position of adjustment, the sound resistant characteristics of said outer member are substantially unaffected and, when in a second position of adjustment, the sound resistant characteristics of said outer member are substantially diminished; said adjustable means being biaseD to assume said one position of adjustment.
Claim 3
Dependent Claim
59 words
The ear-protecting device of claim 1 wherein said outer member is provided with an opening, and said adjustable means comprises a valve piece of sound resistant material adjustably mounted on said outer member and, when in said one position of adjustment, closing the outer member opening and, when manually actuated to a second position of adjustment, uncovering said opening.
Claim 4
Dependent Claim
21 words
The ear-protecting device of claim 2 wherein said valve piece is substantially concealed and disposed intermediate said outer and inner members.
Claim 5
Dependent Claim
27 words
The ear-protecting device of claim 3 including a manual control element protruding outwardly from the exterior of said outer member and in engagement with said valve piece.
Claim 6
Dependent Claim
33 words
The ear-protecting device of claim 3 wherein said valve piece includes a portion thereof hingedly connected to the interior surface of said outer member and offset with respect to said outer member opening.
Claim 7
Dependent Claim
64 words
The ear-protecting device of claim 1 wherein the outer member is substantially cup-shaped and molded of substantially rigid plastic, and the inner member is of soft, deformable sound absorbing material and conforms substantially to the interior surface configuration of said outer member; said inner member having a portion thereof deformed by said adjustable means when the latter is in said second position of adjustment.
Claim 8
Dependent Claim
37 words
The ear-protecting device of claim 4 including head-attaching means adjustably connected to the exterior of said outer member, and said manual control element is carried by said valve piece and projects outwardly through the outer member opening.
Claim 9
Dependent Claim
39 words
The ear-protecting device of claim 4 wherein said manual control element includes stop means engaging the exterior of said outer member to prevent over-manipulation of said element when the latter is manually moved to said second position of adjustment.
References Cited (Backward Citations)
US3335720A
Cited
US3423759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |