Apparatus and method for conveying amplified sound to the ear
Patent 5031219 Issued on July 9, 1991. Estimated Expiration Date: 
September 15, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 15, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1077766 1683316 2246737 2487038 2939923 3209082 3312789 3800791 Earpiece which substantially consists of a thin-walled flexible capsule filled with a liquid medium Sound transfer from a hearing aid to the human ear drum Patent #: 4520236 InventorsAssigneeApplicationNo. 244398 filed on 09/15/1988US Classes:381/328, Ear insert181/132, With diaphragm381/338With tubular waveguide or resonant elementExaminersPrimary: Isen, Forester W.Attorney, Agent or FirmForeign Patent References
International ClassH04R 025/00AbstractAn 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. | |
