Venting water-tight battery-operated devices

Chemistry: electrical current producing apparatus – product – and – Means externally releasing internal gas pressure from closed... – Elastic – resilient or spring biasing valve means

Reexamination Certificate

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Details

C220S203290, C277S552000

Reexamination Certificate

active

07846570

ABSTRACT:
Water-tight battery powered appliances, for example personal care appliances such as razors and toothbrushes, are provided. The appliances include a housing having a seal that allows gases, e.g., hydrogen, to vent from the appliance without allowing water to enter.

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