Patent ID: 7776028

Claim:
An appliance for administering reduced pressure treatment to a wound on a body, the appliance comprising: an overlay comprising: a top cup member comprising a top membrane portion and a top frame portion adjacent to the top membrane portion; and a secondary cup member comprising a secondary membrane portion and a secondary frame portion adjacent to the secondary membrane portion; and a seal configured to seal the overlay to the body, so that reduced pressure may be maintained in the volume under the overlay at the site of the wound; wherein: the entire top frame portion circumscribes an outer periphery of the top membrane portion; the secondary membrane portion is directly attached to the top frame portion; the entire secondary membrane portion circumscribes an outer periphery of the top frame portion; the entire secondary frame portion circumscribes an outer periphery of the secondary membrane portion; the secondary frame portion is larger than and has substantially the same shape as the top frame portion; and the overlay is sized to be placed over and enclose the wound and adapted to maintain reduced pressure in the volume under the overlay at the site of the wound; means for supplying reduced pressure, configured to operably connect the overlay to a reduced pressure supply source that provides a supply of reduced pressure to the overlay, so that the volume under the overlay at the site of the wound is supplied with reduced pressure by the reduced pressure supply source; wherein the top frame portion has a vertical displacement so that the secondary membrane portion and the top membrane portion do not lie within the same plane.