A collapsible sun shade adapted to be used with a chair is disclosed. The shade is made of spring steel or equivalent material and is adapted to be affixed to cover the seat portion of a lounge chair. The shade is unfolded under the force of the compressed spring and attached to the chair to provide...http://www.google.fr/patents/US7048333?utm_source=gb-gplus-shareBrevet US7048333 - Collapsible sun shade for a chair
