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A portable inflatable valve is provided for disposition in a floor drain opening to prevent the undesired flow of toxic liquids into the drain opening. The valve includes a rigid support structure adapted to rest on the floor surface above the drain opening. A pressurized gas cylinder is located bel

A portable inflatable valve is provided for disposition in a floor drain opening to prevent the undesired flow of toxic liquids into the drain opening. The valve includes a rigid support structure adapted to rest on the floor surface above the drain opening. A pressurized gas cylinder is located below the rigid support structure for pressuring a surrounding elastomeric sock into sealing contact with the hole side surface. Actuation of the gas cylinder is accomplished by a manual plunger arranged for downward motion to puncture a foil closure on the upper end of the gas cylinder.

대표청구항 ▼

A portable elastomeric valve for a floor drain hole, comprising a rigid support structure adapted to be positioned on a floor over an associated drain hole; a gas cylinder located below said support structure for disposition within the drain hole; a tubular spacer means depending from said rigid sup

A portable elastomeric valve for a floor drain hole, comprising a rigid support structure adapted to be positioned on a floor over an associated drain hole; a gas cylinder located below said support structure for disposition within the drain hole; a tubular spacer means depending from said rigid support structure for spacing the gas cylinder downwardly from said support structure; said gas cylinder having a puncturable closure located within said tubular spacer means; an upright manually-operable plunger slidably mounted on said rigid support structure for downward motion through the tubular spacer means, whereby said plunger is enabled to puncture said closure to release pressurized gas from said cylinder into a space circumscribed by said tubular spacer means; an elastomeric sock having a lower closed end wall underlying said gas cylinder, and an upper mouth affixed to said rigid support structure; and said elastomeric sock encircling said spacer means and said cylinder, whereby pressurized gas is enabled to flow from the spacer means outwardly into said sock so as to inflate the sock into sealing engagement with a surface of the associated drain hole.