Patent US3921756A successfully refreshed from Google Patents.
US3921756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic ear mold for hearing aid
Assignee: Individual
•
Filing: 1973-10-23
•
Granted: 1975-11-25
•
Expires: 1993-10-23
Abstract
Abstract This disclosure describes an acoustic ear mold insertable into the ear of an individual with impaired hearing and used in conjunction with a hearing aid. Inserted into the molded portion of the ear mold is a central thin-walled metal tube surrounded by a larger thin-walled metal tube, with annular end plates defining a closed resonance chamber. There is an opening through the wall of the central tube forming a path between the space inside the central tube and the annular chamber. Sound energy from the hearing aid is conducted to the ear mold through the central tube where it is reinforced by resonance in the annular chamber before passing on to the ear of the user.
Inventors
- 👤 Rubein V Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:27
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/65; H04R25/652; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
In a hearing aid ear mold insertable into the ear canal and having a longitudinal conduit for the passage of sound wave energy from a hearing aid, to the tympanic membrane of the ear, the improvement comprising a metal structure having: a. a central thin walled metal tube forming said conduit, connected at one end by tubular means to said hearing aid, the other end inserted into the ear; b. an outer thin walled metal tube coaxial with said central tube, and forming an annular space, closed by annular end walls, sealing the space between the ends of said two tubes; c. an opening in the wall of said central tube, joining said annular space and the space inside said conduit.
Claim 2
Dependent Claim
121 words
In a hearing aid ear mold insertable into the ear canal and having a longitudinal conduit for the passage of sound wave energy from a hearing aid, to the tympanic membrane of the ear, the improvement comprising a metal structure having: a. a central thin walled metal tube forming said conduit, connected at one end by tubular means to said hearing aid, the other end inserted into the ear; b. an outer thin walled metal tube coaxial with said central tube, and forming an annular space, closed by annular end walls, sealing the space between the ends of said two tubes; c. an opening in the wall of said central tube, joining said annular space and the space inside said conduit.
Claim 3
Dependent Claim
30 words
The ear mold as in claim 1 including a thin layer of plastic molded to the outer surface of said outer tube and to the contour of the users ear.
Claim 4
Dependent Claim
20 words
The ear mold as in claim 1 in which said central tube is constructed with two portions of different diameters.
Claim 5
Dependent Claim
31 words
The ear mold as in claim 3 in which the portion of larger diameter is connected to the hearing aid and the part of lesser diameter is inserted into the ear.
Claim 6
Dependent Claim
25 words
The ear mold as in claim 3 in which said opening in the wall of said central tube is in the portion of larger diameter.
Claim 7
Dependent Claim
21 words
The ear mold as in claim 1 in which said central and outer tubes and end walls are made of gold.
Claim 8
Dependent Claim
22 words
The end mold as in claim 1 in which said central and outer tubes and end walls are made of stainless steel.
References Cited (Backward Citations)
US3602330A
Cited
US3688863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |