US Patent 7234770 Portable inflatable seat cushion

A portable seat cushion for a bench has an inflatable panel, a strap having an end affixed to a back side of panel and extending outwardly therefrom, a first fastener affixed to a front side of the panel, and a second fastener affixed to the strap at an end opposite the panel. The second fastener is suitable for affixing to the first fastener when the bottom surface of the panel is placed upon a bench and the strap is extended along an underside of the bench toward the front side of the panel. The strip can have an elastic section formed therealong. A valve allows air to be selectively introduced into the interior compartment of the inflatable panel.