Convertible Umbrella

Prototype of an umbrella with a folding arm system

In 1988, SL Rasch developed the prototype of a convertible umbrella as a study for the potential shading system on the large piazza around the Prophet’s Mosque in Medina. This was the first umbrella with a folding arm system, and its mechanism permits a maximum span of more than 12 metres. The structure is designed for wind speeds of up to 155 miles per hour – in both deployed and folded position. An anemometer ensures the umbrella is prevented from opening or closing when a strong wind is blowing. After being temporarily installed in front of the UN building in San Francisco (USA), the prototype now stands on private property in Germany.

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Innovative mechanism - The prototype was the first umbrella by SL Rasch with a folding arm system. Innovative mechanism

The prototype was the first umbrella by SL Rasch with a folding arm system.

Unvarying height - If the arms fold up as the umbrella closes, its overall height remains unchanged. Unvarying height

If the arms fold up as the umbrella closes, its overall height remains unchanged.