Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1986-11-19
1989-01-31
Moon, Charlie T.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29458, 29460, 181129, 264222, 381 686, 381 69, 381 692, B29D 1700
Patent
active
048006360
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.
REFERENCES:
patent: 2945715 (1960-07-01), Burrell
patent: 3170046 (1965-02-01), Leale
patent: 3345737 (1967-10-01), Gordon
patent: 3440314 (1969-04-01), Frisch
patent: 3475528 (1969-10-01), Parks et al.
patent: 3783201 (1974-01-01), Weiss et al.
patent: 4617429 (1986-10-01), Bellafiore
Moon Charlie T.
Topholm & Westermann ApS
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