US4953215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement to prevent the intrusion of foreign matter into an electro-acoustical transducer
Assignee: Siemens AG
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Filing: 1989-10-05
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Granted: 1990-08-28
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Expires: 2009-10-05
Abstract
Abstract In an arrangement to prevent the intrusion of foreign matter into a transducer which extends with a projection provided with an opening into a sound channel of a hearing aid, a reduced need for space as well as simpler construction, compared with the state of the art, are achieved by means of the following characterizing features: A membrane made of pore-free material is provided, which has at least one bore for the passage of sound of from a few hundredths to a few tenths of a millimeter diameter, and in which the wall thickness of the membrane is small with respect to the diameter of the bore.
Inventors
- 👤 Hans-Joachim Weiss
- 👤 Christof Haertl
- 👤 Juergen Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:09
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/65; H04R25/652; H04R25/654
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
73 words
A hearing aid comprising: a housing containing a sound-conducting channel; an electro-acoustic transducer having a projection which extends into said channel; and a nonporous membrane substantially covering said projection and having at least one bore communicating with said channel, said bore having a diameter which at least about nine hundredths of a millimeter and is at most about six tenths of a millimeter, and a thickness which is much less than said diameter.
Claim 2
Dependent Claim
73 words
A hearing aid comprising: a housing containing a sound-conducting channel; an electro-acoustic transducer having a projection which extends into said channel; and a nonporous membrane substantially covering said projection and having at least one bore communicating with said channel, said bore having a diameter which at least about nine hundredths of a millimeter and is at most about six tenths of a millimeter, and a thickness which is much less than said diameter.
Claim 3
Dependent Claim
12 words
A hearing aid according to claim 1, wherein said membrane is cap-shaped.
Claim 4
Dependent Claim
14 words
A hearing aid according to claim 1, wherein said membrane is made of metal.
Claim 5
Dependent Claim
15 words
A hearing aid according to claim 3, wherein said membrane is made of deep-drawable material.
Claim 6
Dependent Claim
14 words
A hearing aid according to claim 3, wherein said membrane is made of mu-metal.
Claim 7
Dependent Claim
30 words
A hearing aid according to claim 1, wherein said membrane is located inside said channel and has a diameter which is approximately equal to the outer diameter of said projection.
Claim 8
Dependent Claim
30 words
A hearing aid according to claim 6, wherein said membrane has a diameter which exceeds the outer diameter of said projection by up to twice the thickness of said membrane.
Claim 9
Dependent Claim
21 words
A hearing aid according to claim 1, wherein the thickness of said membrane is about a few hundredths of a millimeter.
Claim 10
Dependent Claim
17 words
A hearing aid according to claim 8, wherein the thickness of said membrane is approximately 0.02 mm.
Claim 11
Dependent Claim
26 words
A hearing aid according to claim 1, wherein said membrane has a cylindrical surface and a convex surface extending from an end of said cylindrical surface.
Claim 12
Dependent Claim
18 words
A hearing aid according to claim 1, further comprising a clamp which secures the membrane to said projection.
Claim 13
Dependent Claim
21 words
A hearing aid according to claim 10, wherein said membrane has said bore arranged at the center of said convex surface.
Claim 14
Dependent Claim
14 words
A hearing aid according to claim 1, wherein said electroacoustical transducer is an earphone.
Claim 15
Dependent Claim
75 words
A hearing aid comprising: a tube which forms a sound-conducting channel; an electro-acoustic transducer having a projection which extends into said tube; and a nonporous membrane substantially covering said projection and having at least one bore communicating with said channel, said bore having a diameter which is at least about nine hundredths of a millimeter and is at most about six tenths of a millimeter, and a thickness which is much less than said diameter.
Claim 16
Dependent Claim
75 words
A hearing aid comprising: a tube which forms a sound-conducting channel; an electro-acoustic transducer having a projection which extends into said tube; and a nonporous membrane substantially covering said projection and having at least one bore communicating with said channel, said bore having a diameter which is at least about nine hundredths of a millimeter and is at most about six tenths of a millimeter, and a thickness which is much less than said diameter.
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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) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |