American Sterilizer Company

Steven G Palmer

David S Chapin

Charles E Hughes

Matthew Williams

An inner container is disposed within an outer container containing an amount of foamable liquid sufficient to provide a substantial foam production capacity. The dual-container foam dispenser is provided with a porous diffusing element having material surface characteristics optimally suited for diffusing pressurized air into stationary foamable liquid located within the inner container, thereby producing high-quality foam. The inner container is provided with an upper valve and a lower valve, each biased open by a return-action biasing force. The valves open to permit flow in either direction between the containers, depending upon system pressure changes during different stages in the foam production cycle, to prevent leakage of foam out of the device and to permit refilling the inner container.

Dual-container foam dispenser

A biological indicator is disclosed for determining the efficacy of a sterilization cycle using hydrogen peroxide vapor at subatmospheric conditions. The biological indicator includes a vial formed of a substance which resists retention of residual sterilant while also maintaining vial clarity. Also disclosed is an improved cap design which facilitates activation of the biological indicator after the sterilization cycle is complete.

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Apex, NC, United States of America

Steven G Palmer