US Patent 7694372 Air mattress

An air mattress includes an inflatable compartment having a length and width, when inflated, sufficient to support a human body; an internal, generally horizontal wall located between the top and bottom of the compartment and connected to and horizontally restraining the sides of the compartment; at least one internal, generally vertical member connected to and restraining the relative vertical movement of the top and bottom of the compartment; and wherein one of the internal, generally vertical member and the internal, generally horizontal wall possesses an opening that permits at least a portion of the other structure to pass therethrough without interruption.