Sail umbrella

Abstract

A structure comprising a supporting pole ( 1 ), a plurality of ribs ( 21 ) converging onto said pole, a covering canvas ( 4 ), fastened on said ribs, means apt to move said canvas ( 4 ) from the closed state to the open state and viceversa, a rope or stay rod ( 6 ) destined to bend upwards one of the ribs, as well as a jib ( 9 ) fastened to the canvas ( 4 ) at the position of the rib ( 21 ) apt to bend and to the activation rope ( 6 ), with said jib ( 9 ), when stretched, destined to act as orienting rudder of the covering, so that in presence of wind the umbrella orients and the upward folding of a covering portion, at the inflected rib, allows the continuous exhaust of the air which is pushed by the wind under the covering itself.

1 . A sail umbrella, therewith spaces on the open can be sheltered from the sun and rain, comprising a supporting pole ( 1 ), a plurality of ribs ( 21 ) converging onto a point ( 3 ) of the pole ( 1 ), the covering canvas ( 4 ) is anchored to said ribs ( 21 ), means apt to bring the ribs ( 21 ) from the closed state to the open state and viceversa, characterized by an activation rope or stay-rod ( 6 ) connecting a point ( 7 ), placed towards the end of a rib ( 21 ), with a sliding point ( 8 ) placed toward the top of the pole ( 1 ), being said stay rod ( 6 ) apt to determine the upward inflection of the rib ( 21 ) stressed therefrom, as well as characterized by a jib ( 9 ) fastened both to the covering canvas ( 4 ) at the rib ( 21 ) destined to inflect, and to the activation stay-rod ( 6 ), being said jib ( 9 ) destined, when stretched, to act as orienting rudder for the covering canvas ( 4 ).  
   
   
       2 . The sail umbrella, as claimed in  claim 1 , comprising a supporting pole ( 1 ) characterized in that it is axially revolving onto the means supporting it, as well as characterized by a fixed ring nut ( 3 ) placed at an appropriate distance from the top thereof and by a sliding point ( 8 ) placed at a higher level than the one of the fixed ring nut ( 3 ).  
   
   
       3 . The sail umbrella, as claimed in  claim 1 , characterized in that the pole ( 1 ) is coupled on the lower side to supporting means on the ground or on the floor.  
   
   
       4 . The sail umbrella, as claimed in  claim 1 , characterized in that the pole ( 1 ) is coupled on the upper side to supporting means.  
   
   
       5 . The sail umbrella, as claimed in  claim 1 , characterized by at least one rib ( 21 ) able to inflect upwards when stressed in a point ( 7 ) placed towards its free end.  
   
   
       6 . The sail umbrella, as claimed in  claim 1 , characterized by a sliding point ( 8 ) in the pole ( 1 ) wherefrom the end ( 7 ) of the rib ( 21 ) destined to inflect upwards is pulled, said sliding point ( 8 ) being placed at a level at least higher than the intersection point of the pole with the line tangent to the attachment point ( 7 ) on the rib ( 21 ) to be inflected when it is in open but not inflected position.  
   
   
       7 . The sail umbrella, as claimed in  claim 1 , characterized in that the activation stay-rod ( 6 ) is leaning downwards starting from the sliding point ( 8 ) and it has means for its anchoring in a stretched position on the pole in a point which can be reached by the user.  
   
   
       8 . The sail umbrella, as claimed in  claim 1 , characterized by an orienting jib ( 9 ) on one side fastened to the covering canvas ( 4 ), on the other side coupled, at least in some points, to the activation stay-rod ( 6 ) to be kept in a stretched configuration when said stay-rod ( 6 ) is stretched and the rib ( 21 ), with which it is joined, is in the inflected state.  
   
   
       9 . The sail umbrella, as claimed in  claim 1 , characterized in that the orienting jib ( 9 ) has a shape recalling the triangular shape.  
   
   
       10 . The sail umbrella, as claimed in  claim 1 , characterized by four ribs ( 21 ) almost with equal length.