Umbrella

Umbrella, comprising:

• (a) a tubular main post, adapted to be mounted in the ground in a vertical position,
• (b) a generally circular foldable canopy carried above the upper end of the main post,
• (c) braces connecting the canopy to a hub that is slidably mounted on an intermediate portion of the post,
• (d) means for moving the hub vertically along the post from a high position where the canopy is raised to a low position where the canopy is folded,
• (e) an auxiliary post slidably mounted in the upper portion of the main post, the center of the canopy being connected to the upper end of the auxiliary post, and
• (f) a spring acting between the main post and the auxiliary post to resist upward movement of the auxiliary post when wind acts on the canopy.