Patent ID: 6913030

Claim:
A pneumatically activated umbrella comprising a sleeve connected to tubular portions encapsulated in one another to furl and unfurl a system of rods that support a fabric covering; the tubular portions encapsulated in one another possess respective O-rings so as to define a longitudinal conduit in communication at its bottom end with a valve that directs the flow of air; the conduit being a blind sleeve within which a sliding piston provided with longitudinal and transversal passages and its own O-rings; said passages, being in a position to communicate with further passages in the sleeve, for the entry and exit of the flow of air produced by a pump for two operating positions, open and closed, and in a neutral position with reference to communication with orifices passing through the sleeve to the outside; the upper end of said tubular portions communicate with a disc-shaped piece provided with conduits arranged in a radial manner around the central axis and in communication with passages in the covering of the umbrella's mushroom-shaped portion.