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US4987597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for closing openings of a hearing aid or an ear adaptor for hearing aids
Assignee: Siemens AG
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Filing: 1988-10-03
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Granted: 1991-01-22
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Expires: 2008-10-03
Abstract
Abstract An apparatus for closing an opening of a hearing aid or an ear adaptor for a hearing aid, particularly openings such as sound entry openings, sound exit openings and aeration openings utilizes a micro-porous membrane of an anti-adhesive material which is introduced into the respective opening. Preferably, the membrane is polytetrafluoroethylene material.
Inventors
- 👤 Christof Haertl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:22
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/65; H04R25/652; H04R25/654; H04R2225/00; H04R2225/57; H04R25/60; H04R25/603; H04R25/607
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
An apparatus for closing openings in a housing of hearing aids and parts of hearing aids, said openings being selected from a group consisting of sound entry, sound exit and aeration openings, said apparatus comprising a cap being mounted on the housing to close the opening, said cap having an opening for the transmission of sound and air through the cap, said cap having means for preventing moisture, sweat and cerumen from passing through said opening in the cap, said means being a microporous membrane of a hydrophobic material extending across the opening of the cap, said material of the membrane being a microporous polytetraflourethylene.
Claim 2
Independent Claim
105 words
An apparatus for closing openings in a housing of hearing aids and parts of hearing aids, said openings being selected from a group consisting of sound entry, sound exit and aeration openings, said apparatus comprising a cap being mounted on the housing to close the opening, said cap having an opening for the transmission of sound and air through the cap, said cap having means for preventing moisture, sweat and cerumen from passing through said opening in the cap, said means being a microporous membrane of a hydrophobic material extending across the opening of the cap, said material of the membrane being a microporous polytetraflourethylene.
Claim 3
Dependent Claim
16 words
An apparatus according to claim 1, wherein the membrane is an integral part of the cap.
Claim 4
Dependent Claim
17 words
An apparatus according to claim 1, wherein the membrane is at least partially molded into the cap.
Claim 5
Dependent Claim
34 words
An apparatus according to claim 1, wherein the membrane is separate from the cap and is placed between the cap and the opening of the housing before the cap is attached to the housing.
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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) | 1994-01-21 | 1994-07-23 | 1995-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-21 | 1998-07-23 | 1999-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-21 | 2002-07-23 | 2003-01-22 | $7700.00 | Window Closed / Lapsed |