Process for manufacturing an in-the-ear canal hearing aid
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United States of America Patent
Stats
-
Jan 31, 1989
Grant Date -
N/A
app pub date -
Nov 19, 1986
filing date -
Dec 3, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a process for manufacturing an in-the-ear-canal hearing aid with microphone, amplifier, volume control, battery compartment with battery, and earphone, together with an individually matched ear-piece by making an impression of the ear canal for producing a casting mold and filling the casting mold with a polymerizable plastic. The new process involves pulling at least one prefabricated plastic hollow body, matched to the dimensions of the earphone and the other components, into the casting mold, filling the cavity between the hollow body and casting mold with polymeriable plastic, polymerizing the plastic and completing the hearing aid by inserting the earphone and the other components into the completed ear-piece, including securing a cover plate to the ear-piece, after stripping and removal of all parts not required.
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