Hearing aid battery barrier
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United States of America Patent
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Aug 2, 2011
Grant Date -
Jan 4, 2007
app pub date -
Jun 27, 2006
filing date -
Jun 30, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Embodiments of the invention provide a barrier for protecting hearing aid metal-air battery assemblies from exposure to liquids causing obstruction of a battery air vent. One embodiment provides a barrier configured to be attached to a CIC hearing aid battery having a vent. The barrier has an oxygen permeability configured to allow the diffusion of sufficient oxygen for a battery to meet the power demands of a hearing aid operating in the bony portion of the ear canal over an extended time period. The barrier has a physical property configured to substantially prevent liquid obstruction of at least a portion of the vent on a metal-air battery such as a zinc-air battery. The physical property can be at least one of a hydrophobicity, oleophobocity or surface energy. The barrier can be directly attached to the battery or indirectly via a holder and can encase substantially the entire battery.
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