Spring-ball valve for voice prosthesis
A voice prosthesis that is formed of a soft, elastomeric body containing a spring loaded ball valve, preferably a non-impervious, smooth ball such as a ruby ball biased by a flat helical spring against a seat mounted in a rigid cartridge. An insertion device includes a handle with expandable tip whi...
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| Format: | Patent |
| Sprache: | eng |
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