Importance

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Abstract

A non-return valve assembly particularly for an incontinence device, includes a least three layers, the layers being secured together, the first layer being a sheet or film of perforated material, and the second layer is a sheet or film of material having cuts therein defining an array of flap valves. The third layer is a material having holes therein, each hole being in registry with an associated flap valve and being of a size to accommodate the flap of said valve. The flap valves may be arranged in a regular rectangular array and each flap of a valve is defined by three cuts in the sheet material, the cuts constituting three sides of a rectangle so that the flap of the valve can pivot out of the plane of the sheet material generally about a notional axis formed by the fourth side of the rectangle.

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First Claim