US5031219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for conveying amplified sound to the ear
Assignee: Epic Corp
•
Filing: 1988-09-15
•
Granted: 1991-07-09
•
Expires: 2008-09-15
Abstract
Abstract An earmold and a method of manufacturing an earmold for a hearing aid that conveys amplified sound from the hearing aid into the ear canal to a closed cavity adjacent the tympanic membrane. The earmold includes an acoustic conduction tube having an external diameter smaller than the ear canal and a flexible flanged tip that exerts negligible pressure on the wall of the canal. One end of the tube is held in place in the canal by the flanged tip. The opposite end of the tube may be positioned in the ear aperture by a fitting in the ear concha that may be integral with the tube. The hearing aid and the earmold leave the canal open preferably to a point past the canal isthmus.
Inventors
- 👤 Gary L. Ward
- 👤 M. Duncan MacAllister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:47
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/65; H04R25/652; H04R25/656; H04R2225/00; H04R2225/77; H04R2460/00; H04R2460/09; H04R25/60; H04R25/607; H04R25/658
Claims Analysis
Total Claims: 94
Claim 1
Independent Claim
165 words
A hearing aid comprising: (a) amplifier means for receiving and amplifying unamplified sound and for conveying the amplified sound to the ear canal, said amplifier means not substantially preventing unamplified sound from entering the ear canal; (b) a longitudinally rigid acoustic conduction tube for conducting amplified sound from said amplifier means to the tympanic membrane at the inner end of the ear canal, said tube having an external diameter smaller than the internal diameter of the ear canal for exposing a substantial portion of the ear canal to said unamplified sound, and having a first end affixed to said amplifier means and a second end in the ear canal between the isthmus of the canal and the tympanic membrane; and (c) a flexible flanged tip affixed to said tube near said second end, said flanged tip having an outermost perimeter that conforms to the cross-sectional perimeter of the ear canal adjacent said second end while exerting negligible pressure on the wall of the ear canal.
Claim 2
Dependent Claim
165 words
A hearing aid comprising: (a) amplifier means for receiving and amplifying unamplified sound and for conveying the amplified sound to the ear canal, said amplifier means not substantially preventing unamplified sound from entering the ear canal; (b) a longitudinally rigid acoustic conduction tube for conducting amplified sound from said amplifier means to the tympanic membrane at the inner end of the ear canal, said tube having an external diameter smaller than the internal diameter of the ear canal for exposing a substantial portion of the ear canal to said unamplified sound, and having a first end affixed to said amplifier means and a second end in the ear canal between the isthmus of the canal and the tympanic membrane; and (c) a flexible flanged tip affixed to said tube near said second end, said flanged tip having an outermost perimeter that conforms to the cross-sectional perimeter of the ear canal adjacent said second end while exerting negligible pressure on the wall of the ear canal.
Claim 3
Dependent Claim
120 words
A hearing aid comprising: (a) amplifier means for receiving and amplifying unamplified sound; (b) a tube for conveying amplified sounds from said amplified means to a first end of said tube at least five millimeters inside the ear canal; and (c) a flexible flanged tip affixed to said tube for positioning said tube in the canal, the outermost perimeter of said flanged tip being less than two millimeters thick at its radially outward edge and contacting the wall of the canal adjacent said first end forming a resonant cavity next to the tympanic membrane, said tube and said amplifier means leaving the portion of the canal extending from the ear aperture to said flanged tip exposed to the unamplified sound.
Claim 4
Dependent Claim
120 words
A hearing aid comprising: (a) amplifier means for receiving and amplifying unamplified sound; (b) a tube for conveying amplified sounds from said amplified means to a first end of said tube at least five millimeters inside the ear canal; and (c) a flexible flanged tip affixed to said tube for positioning said tube in the canal, the outermost perimeter of said flanged tip being less than two millimeters thick at its radially outward edge and contacting the wall of the canal adjacent said first end forming a resonant cavity next to the tympanic membrane, said tube and said amplifier means leaving the portion of the canal extending from the ear aperture to said flanged tip exposed to the unamplified sound.
Claim 5
Dependent Claim
33 words
The hearing aid as defined in claim 2 wherein said flanged tip comprises a cup affixed to said first end, said outermost perimeter of said cup exerting nearly negligible pressure on said wall.
Claim 6
Dependent Claim
25 words
The hearing aid as defined in claim 3 wherein said tube extends inside the ear canal at least as deep as the osseous portion thereof.
Claim 7
Dependent Claim
34 words
The hearing aid as defined in claim 3 wherein said cup has an opening facing the tympanic membrane and a depth approximately equal to the diameter of the ear canal at said first position.
Claim 8
Dependent Claim
20 words
The hearing aid as defined in claim 2 wherein said flanged tip comprises a composite of polymeric matrix and microspheres.
Claim 9
Dependent Claim
22 words
The hearing aid as defined in claim 2 wherein said first end is approximately five to ten millimeters from the tympanic membrane.
Claim 10
Dependent Claim
25 words
The hearing aid as defined in claim 2 wherein said tube comprises a longitudinally rigid tube having an outer diameter smaller than the ear canal.
Claim 11
Dependent Claim
57 words
A hearing aid comprising an acoustic conduction tube for conveying amplified sound from an amplifier into the ear canal to a position near the tympanic membrane, and means for creating a resonant cavity next to the tympanic membrane, said hearing aid allowing unamplified sound to enter the canal to a position past the isthmus of the canal.
Claim 12
Dependent Claim
57 words
A hearing aid comprising an acoustic conduction tube for conveying amplified sound from an amplifier into the ear canal to a position near the tympanic membrane, and means for creating a resonant cavity next to the tympanic membrane, said hearing aid allowing unamplified sound to enter the canal to a position past the isthmus of the canal.
Claim 13
Dependent Claim
54 words
An earmold comprising an acoustic conduction tube that exposes the ear canal to unamplified sound, and a disk for creating a resonant cavity next to the tympanic membrane affixed to said tube, said disk contacting the wall of the canal only in the area of the canal between the isthmus and the tympanic membrane.
Claim 14
Dependent Claim
54 words
An earmold comprising an acoustic conduction tube that exposes the ear canal to unamplified sound, and a disk for creating a resonant cavity next to the tympanic membrane affixed to said tube, said disk contacting the wall of the canal only in the area of the canal between the isthmus and the tympanic membrane.
Claim 15
Dependent Claim
112 words
An earmold comprising: (a) an acoustic conduction tube open at both ends for conveying amplified sound to the tympanic membrane at the inner ear of the ear canal, said tube having an external diameter smaller than the internal diameter of the canal to allow unamplified sound received at the ear to reach into the canal to a first position; and (b) a flexible disk affixed to said tube adjacent said first position, said disk having a radially outward edge less than 2 millimeters thick and a diameter that is the same as the diameter of the canal adjacent said first position, and having a hole coincident with the opening in the tube.
Claim 16
Dependent Claim
112 words
An earmold comprising: (a) an acoustic conduction tube open at both ends for conveying amplified sound to the tympanic membrane at the inner ear of the ear canal, said tube having an external diameter smaller than the internal diameter of the canal to allow unamplified sound received at the ear to reach into the canal to a first position; and (b) a flexible disk affixed to said tube adjacent said first position, said disk having a radially outward edge less than 2 millimeters thick and a diameter that is the same as the diameter of the canal adjacent said first position, and having a hole coincident with the opening in the tube.
Claim 17
Dependent Claim
29 words
The earmold as defined in claim 11 wherein said disk has a concavity facing the tympanic membrane and is 0.05 to 2 millimeters thick at the radially outward edge.
Claim 18
Dependent Claim
26 words
The earmold as defined in claim 12 wherein said concavity has a longitudinal depth approximately equal to the diameter of the canal adjacent said first position.
Claim 19
Dependent Claim
18 words
The earmold as defined in claim 11 wherein said disk comprises a composite of polymeric matrix and microspheres.
Claim 20
Dependent Claim
19 words
The earmold as defined in claim 11 wherein said disk is affixed to the distal end of said tube.
Claim 21
Dependent Claim
33 words
The earmold as defined in claim 11 wherein said tube further comprises concha fitting means for holding one distal end of said tube in the aperture of the ear without touching the canal.
Claim 22
Dependent Claim
12 words
The earmold as defined in claim 11 wherein said disk is flat.
Claim 23
Dependent Claim
14 words
The earmold as defined in claim 11 wherein said disk is a solid ellipsoid.
Claim 24
Dependent Claim
12 words
The earmold as defined in claim 11 wherein said disk is convex.
Claim 25
Dependent Claim
22 words
The earmold as defined in claim 11 wherein said first position is between the isthmus of the canal and the tympanic membrane.
Claim 26
Independent Claim
98 words
A method for making an earmold comprising the steps of: (a) forming an open-ended hollow tube having an external circumferential surface corresponding to the shape of the ear canal of a user, said tube having a first distal end in the canal and a second distal end nearer the ear aperture; (b) reducing the external diameter of said tube; and (c) affixing to said tube in the vicinity of said first end a disk of flexible material having an outermost perimeter that conforms to the cross-sectional perimeter of the ear canal in the area of said first end.
Claim 27
Independent Claim
98 words
A method for making an earmold comprising the steps of: (a) forming an open-ended hollow tube having an external circumferential surface corresponding to the shape of the ear canal of a user, said tube having a first distal end in the canal and a second distal end nearer the ear aperture; (b) reducing the external diameter of said tube; and (c) affixing to said tube in the vicinity of said first end a disk of flexible material having an outermost perimeter that conforms to the cross-sectional perimeter of the ear canal in the area of said first end.
Claim 28
Dependent Claim
43 words
The method as defined in claim 21 further comprising the steps of: (d) creating a concavity on the face of said disk facing the tympanic membrane; and (e) reducing the thickness of the disk at its radially outward edge to approximately 0.05 millimeters.
Claim 29
Dependent Claim
25 words
The method as defined in claim 21 further comprising the step of: (d) forming said flexible material from a composite of polymeric matrix and microspheres.
Claim 30
Dependent Claim
36 words
The method as defined in claim 21 wherein said first distal end extends into the canal to a position between the isthmus and the tympanic membrane and said tube is formed from a longitudinally rigid material.
Claim 31
Independent Claim
173 words
A method for making a hearing aid comprising the steps of: (a) providing amplifier means for receiving and amplifying unamplified sound and for conveying the amplified sound to the ear canal, said amplifier means not preventing unamplified sound from entering the ear canal; (b) forming an open-ended hollow acoustic condition tube having an external diameter corresponding to the diameter of the ear canal and a first distal end in the area between the isthmus and the tympanic membrane; (c) reducing the external diameter of said tube whereby said tube does not contact the wall of the canal when inserted into the canal; (d) affixing a flexible flanged tip to said first end, said flanged tip having an outermost perimeter coincident with the wall of the ear canal; (e) forming a concavity on the face of said flanged tip facing the tympanic membrane; (f) reducing the thickness of said flange to 0.05 to 2 millimeters at the radially outward edge; and (g) affixing the second distal end of said tube to said amplifier means.
Claim 32
Independent Claim
173 words
A method for making a hearing aid comprising the steps of: (a) providing amplifier means for receiving and amplifying unamplified sound and for conveying the amplified sound to the ear canal, said amplifier means not preventing unamplified sound from entering the ear canal; (b) forming an open-ended hollow acoustic condition tube having an external diameter corresponding to the diameter of the ear canal and a first distal end in the area between the isthmus and the tympanic membrane; (c) reducing the external diameter of said tube whereby said tube does not contact the wall of the canal when inserted into the canal; (d) affixing a flexible flanged tip to said first end, said flanged tip having an outermost perimeter coincident with the wall of the ear canal; (e) forming a concavity on the face of said flanged tip facing the tympanic membrane; (f) reducing the thickness of said flange to 0.05 to 2 millimeters at the radially outward edge; and (g) affixing the second distal end of said tube to said amplifier means.
Claim 33
Dependent Claim
25 words
The method as defined in claim 25 further comprising the step of: (h) forming said flange from a composite material of polymeric matrix and microspheres.
Claim 34
Dependent Claim
78 words
A hearing aid comprising: (a) conduction means for conducting amplified sounds from the concha of an ear to the ear canal, said conduction means making no substantial contact with the wall of the ear canal; and (b) sealing means attached to said conduction means for creating a sealed cavity comprising said sealing means, the wall of the ear canal and the tympanic membrane, said sealing means being located between the isthmus and the tympanic membrane of the ear.
Claim 35
Dependent Claim
78 words
A hearing aid comprising: (a) conduction means for conducting amplified sounds from the concha of an ear to the ear canal, said conduction means making no substantial contact with the wall of the ear canal; and (b) sealing means attached to said conduction means for creating a sealed cavity comprising said sealing means, the wall of the ear canal and the tympanic membrane, said sealing means being located between the isthmus and the tympanic membrane of the ear.
Claim 36
Independent Claim
81 words
A method of aiding hearing comprising the steps of: (a) amplifying at least a portion of the unamplified sound received adjacent the outer portion of an ear; (b) sealing, by means of a flexible membrane, a cavity within the ear adjacent the tympanic membrane; (c) conducting said amplified portion of the unamplified sound into the cavity; and (d) controlling the phase relationship of said amplified portion of the unamplified sound to the oscillation of the flexible membrane by the unamplified sound.
Claim 37
Independent Claim
81 words
A method of aiding hearing comprising the steps of: (a) amplifying at least a portion of the unamplified sound received adjacent the outer portion of an ear; (b) sealing, by means of a flexible membrane, a cavity within the ear adjacent the tympanic membrane; (c) conducting said amplified portion of the unamplified sound into the cavity; and (d) controlling the phase relationship of said amplified portion of the unamplified sound to the oscillation of the flexible membrane by the unamplified sound.
Claim 38
Dependent Claim
27 words
The method of claim 28 wherein said amplified portion is conducted into said cavity in phase with the oscillation of the flexible membrane by the unamplified sound.
Claim 39
Dependent Claim
32 words
The method of claim 28 wherein said amplified portion is conducted into said cavity with a phase which lags the phase of the oscillation of the flexible membrane by the unamplified sound.
Claim 40
Dependent Claim
32 words
The method of claim 28 wherein said amplified portion is conducted into said cavity with a phase which leads the phase of the oscillation of the flexible membrane by the unamplified sound.
Claim 41
Dependent Claim
27 words
The method of claim 28 wherein said amplified portion is conducted into the cavity by means which do not substantially contact the wall of the ear canal.
Claim 42
Independent Claim
68 words
A method of aiding hearing comprising the steps of: (a) amplifying the sound received near the outer portion of an ear; (b) flexibly sealing the ear canal to create a sealed cavity adjacent the tympanic membrane; (c) vibrating the wall of said cavity formed by the flexible seal by the sound received without amplification; and (d) conducting the amplified sound to the sealed portion of the ear canal.
Claim 43
Independent Claim
68 words
A method of aiding hearing comprising the steps of: (a) amplifying the sound received near the outer portion of an ear; (b) flexibly sealing the ear canal to create a sealed cavity adjacent the tympanic membrane; (c) vibrating the wall of said cavity formed by the flexible seal by the sound received without amplification; and (d) conducting the amplified sound to the sealed portion of the ear canal.
Claim 44
Dependent Claim
26 words
The method of claim 33 further comprising controlling the phase of the amplified sound with respect to the phase of the sound vibrating the flexible seal.
Claim 45
Dependent Claim
52 words
In a hearing aid wherein a portion of the ear is sealed to create a closed cavity, the improvement comprising flexible means for forming a portion of the seal so that natural sound impinging on said flexible means causes the wall of said cavity formed by said flexible means to vibrate responsively.
Claim 46
Dependent Claim
52 words
In a hearing aid wherein a portion of the ear is sealed to create a closed cavity, the improvement comprising flexible means for forming a portion of the seal so that natural sound impinging on said flexible means causes the wall of said cavity formed by said flexible means to vibrate responsively.
Claim 47
Dependent Claim
20 words
The hearing aid as defined in claim 1 wherein said flanged tip comprises a composite of polymeric matrix and microspheres.
Claim 48
Dependent Claim
23 words
The hearing aid as defined in claim 1 wherein said flanged tip is less than 2 millimeters thick at its radially outward edge.
Claim 49
Dependent Claim
22 words
The hearing aid as defined in claim 1 wherein said flanged tip comprises a cup having an opening facing the tympanic membrane.
Claim 50
Dependent Claim
27 words
The hearing aid as defined in claim 38 wherein said cup has a depth approximately equal to the diameter of the ear canal adjacent said second end.
Claim 51
Dependent Claim
23 words
The hearing aid as defined in claim 2 wherein said flanged tip is less than 2 millimeters thick at its radially outward edge.
Claim 52
Dependent Claim
16 words
The hearing aid as defined in claim 35 wherein said flexible means comprises a flanged tip.
Claim 53
Dependent Claim
15 words
The hearing aid as defined in claim 35 wherein said flexible means comprises a cup.
Claim 54
Dependent Claim
34 words
The hearing aid as defined in claim 42 wherein said cup has an opening facing the tympanic membrane and a depth approximately equal to the diameter of the ear canal adjacent said flexible means.
Claim 55
Dependent Claim
23 words
The hearing aid as defined in claim 35 wherein said flexible means is less than 2 millimeters thick at its radially outward edge.
Claim 56
Dependent Claim
16 words
The hearing aid as defined in claim 35 wherein said flexible means comprises a flat disk.
Claim 57
Dependent Claim
16 words
The hearing aid as defined in claim 35 wherein said flexible means comprises a solid ellipsoid.
Claim 58
Dependent Claim
14 words
The hearing aid as defined in claim 35 wherein said flexible means is convex.
Claim 59
Dependent Claim
24 words
The hearing aid as defined in claim 35 wherein said flexible means is located between the isthmus of the ear canal and tympanic membrane.
Claim 60
Dependent Claim
20 words
The hearing aid as defined in claim 35 wherein said flexible means comprises a composite of polymeric matrix and microspheres.
Claim 61
Dependent Claim
22 words
The hearing aid as defined in claim 35 wherein said flexible means is approximately 5 to 10 millimeters from the tympanic membrane.
Claim 62
Dependent Claim
23 words
The hearing aid as defined in claim 35 further comprising a longitudinally rigid tube having an outer diameter smaller than the ear canal.
Claim 63
Dependent Claim
28 words
The hearing aid as defined in claim 51 wherein said tube has a first distal end located between the isthmus of the ear canal and the tympanic membrane.
Claim 64
Dependent Claim
21 words
The hearing aid as defined in claim 52 wherein said flexible means is affixed to said first end of said tube.
Claim 65
Dependent Claim
36 words
The hearing aid as defined in claim 52 wherein said tube further comprises concha fitting means for holding a second distal end of said tube in the aperture of the ear without touching the ear canal.
Claim 66
Dependent Claim
59 words
In an earmold wherein a portion of the ear canal is blocked to form a cavity bounded on one side by the tympanic membrane, the improvement comprising flexible means for forming a portion of the block so that natural sound impinging on said flexible means causes the portion of the cavity formed by said flexible means to vibrate responsively.
Claim 67
Dependent Claim
59 words
In an earmold wherein a portion of the ear canal is blocked to form a cavity bounded on one side by the tympanic membrane, the improvement comprising flexible means for forming a portion of the block so that natural sound impinging on said flexible means causes the portion of the cavity formed by said flexible means to vibrate responsively.
Claim 68
Dependent Claim
15 words
The earmold as defined in claim 55 wherein said flexible means comprises a flanged tip.
Claim 69
Dependent Claim
14 words
The earmold as defined in claim 55 wherein said flexible means comprises a cup.
Claim 70
Dependent Claim
33 words
The earmold as defined in claim 57 wherein said cup has an opening facing the tympanic membrane and a depth approximately equal to the diameter of the ear canal adjacent said flexible means.
Claim 71
Dependent Claim
22 words
The earmold as defined in claim 55 wherein said flexible means is less than 2 millimeters thick at its radially outward edge.
Claim 72
Dependent Claim
15 words
The earmold as defined in claim 55 wherein said flexible means comprises a flat disk.
Claim 73
Dependent Claim
15 words
The earmold as defined in claim 55 wherein said flexible means comprises a solid ellipsoid.
Claim 74
Dependent Claim
13 words
The earmold as defined in claim 55 wherein said flexible means is convex.
Claim 75
Dependent Claim
24 words
The earmold as defined in claim 55 wherein said flexible means is located between the isthmus of the ear canal and the tympanic membrane.
Claim 76
Dependent Claim
19 words
The earmold as defined in claim 55 wherein said flexible means comprises a composite of polymeric matrix and microspheres.
Claim 77
Dependent Claim
21 words
The earmold as defined in claim 55 wherein said flexible means is approximately 5 to 10 millimeters from the tympanic membrane.
Claim 78
Dependent Claim
22 words
The earmold as defined in claim 55 further comprising a longitudinally rigid tube having an outer diameter smaller than the ear canal.
Claim 79
Dependent Claim
27 words
The earmold as defined in claim 66 wherein said tube has a first distal end located between the isthmus of the ear canal and the tympanic membrane.
Claim 80
Dependent Claim
20 words
The earmold as defined in claim 67 wherein said flexible means is affixed to said first end of said tube.
Claim 81
Dependent Claim
33 words
The earmold as defined in claim 67 wherein said tube further comprises concha fittings for holding a second distal end of said tube in the aperture of the ear without touching the ear.
Claim 82
Dependent Claim
29 words
The earmold as defined in claim 10 wherein said disk has a concavity facing the tympanic membrane and is 0.05 to 2 millimeters thick at the radially outward edge.
Claim 83
Dependent Claim
26 words
The earmold as defined in claim 70 wherein said concavity has a longitudinal depth approximately equal to the diameter of the ear canal adjacent said disk.
Claim 84
Dependent Claim
18 words
The earmold as defined in claim 10 wherein said disk comprises a composite of polymeric matrix and microspheres.
Claim 85
Dependent Claim
19 words
The earmold as defined in claim 10 wherein said disk is affixed to the distal end of said tube.
Claim 86
Dependent Claim
34 words
The earmold as defined in claim 10 wherein said tube further comprises concha fitting means for holding one distal end of said tube in the aperture of the ear without touching the ear canal.
Claim 87
Dependent Claim
12 words
The earmold as defined in claim 10 wherein said disk is flat.
Claim 88
Dependent Claim
14 words
The earmold as defined in claim 10 wherein said disk is a solid ellipsoid.
Claim 89
Dependent Claim
12 words
The earmold as defined in claim 10 wherein said disk is convex.
Claim 90
Dependent Claim
59 words
An earmold comprising: a flexible disk exposed to unamplified sound received adjacent the outer portion of the ear for creating a cavity adjacent the tympanic membrane; an acoustic conduction tube for conducting amplified sound into said cavity; and means for controlling the phase relationship of the amplified sound to the oscillation of said flexible disk by the unamplified sound.
Claim 91
Dependent Claim
59 words
An earmold comprising: a flexible disk exposed to unamplified sound received adjacent the outer portion of the ear for creating a cavity adjacent the tympanic membrane; an acoustic conduction tube for conducting amplified sound into said cavity; and means for controlling the phase relationship of the amplified sound to the oscillation of said flexible disk by the unamplified sound.
Claim 92
Dependent Claim
25 words
The earmold as defined in claim 78 wherein said amplified sound is conducted into said cavity in phase with the oscillation of said flexible disk.
Claim 93
Dependent Claim
30 words
The earmold as defined in claim 78 wherein said amplified sound is conducted into said cavity with a phase which lags the phase of the oscillation of said flexible disk.
Claim 94
Dependent Claim
30 words
The earmold as defined in claim 78 wherein said amplified sound is conducted into said cavity with a phase which leads the phase of the oscillation of said flexible disk.
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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) | 1994-07-08 | 1995-01-07 | 1995-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-08 | 1999-01-07 | 1999-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-08 | 2003-01-07 | 2003-07-09 | $7700.00 | Window Closed / Lapsed |