Abstract: In order to use wind energy to drive a wind power generator or gearbox we usually use a certain sort of propeller rotates in a plane perpendicular to the wind direction. The “Tilting flap” is a new means to be used to achieve the same task but in more efficient manner, the arrangement of the “Tilting flaps” differs than the propeller unit in two ways. It rotates in a plane parallel to the wind direction. Its “Flaps” change their positions during the rotational movement to face the blowing wind currents wherever are these changes are required to gain the optimum use of the wind energy.

Abstract: Umbrella, simply, is a foldable means used for protection from rain and/or sun intensive wind currents usually makes the umbrella rather difficult to be hold and can lead to a serious damage for its components. Creating gaps or holes through the umbrellas surface can reduce or minimize the bad effects of the wind against the umbrella while it still capable to protect things against rain and sun. The present invention relates to a “multi-layer surface umbrella”, which is an umbrella with a surface consists of several fabric layers with a gap in between each adjacent pair of layers to allow wind currents to pass through the surface easily leading to high degree of stability against blowing wind.

Abstract: Garden and beach umbrella, usually used for protection from sun, as we need to cover a relatively large area to be used by several persons the umbrella should be large enough to achieve this task, therefore the intensive wind currents usually have bad effects on the stability of this kind of umbrellas due to its relatively large covering area. Creating gaps or holes through the umbrellas surface can reduce or minimize the bad effects of the wind against the umbrella while it still capable to protect users against direct sun. The present invention relates to a “See Through Umbrella”, which is an umbrella with a surface consists of several concentric polygons of fabric stripes of well designed width and fixed distance separating each adjacent two stripes to allow wind currents to pass through the surface easily leading to high degree of stability against blowing wind. This kind of umbrellas can be of two main different patterns either completely (as in FIG. 1) or partially (as in FIGS.