System and method of making a pool invisible

Abstract

The present invention provides a novel system and method of covering a pool and making the pool invisible. The present system comprises a flat board and at least one lifting device. The board has sufficient size for covering the pool and is made of rigid materials so as to be able to bear heavy weight. The lifting device includes two parts: a movable part and a fixed part. The one part of the lifting device is fixed on the ground or somewhere in a building near the pool, and another part is joined to the covering board. The lifting device can vertically move the horizontal covering board upward or downward and keep the covering board always horizontal. When want to swim, the users only lift up the covering board, and when want to BBQ, they only lower the covering board to cover the pool. Once the covering board reaches the top of the pool wall, the pool becomes hidden and invisible. The users can do some activities and put something on it even on the lifted covering board as on the floor or on the ground. This expands actually their living space.

1 . A method of covering a pool comprising:
 a) making a board of rigid material of sufficient size to accommodate use for covering said pool and by a human being for standing, walking, working, and putting something on it, and   b) using at least one device including a movable member and a fixed member for lifting said board being parallel with the surface of said pool vertically upward or downward, and   c) fixing one of the two members of each of said device(s) pointing to and being able to reach said board being in the state of covering normally said pool at appropriate fixing location(s) on the ground or somewhere in a building near said pool on the same side of said board but not on said board, said fixing location(s) allowing said board to move vertically and to get to a predetermined height, and   d) joining another one of the two members of each of said device(s) to said board being in the state of covering normally said pool at the about 90 degree included angle between the moving track of said device (or the plane in which said device moves) and said board at the appropriate location(s) being in respective correspondence with said fixing location(s), every included angle being required to be always equal and their vector sum of horizontal rays being required to be always zero when joining and in the lifting process so as to keep said board always horizontal and having no horizontal displacement, and   e) coupling a power transmission with said movable member(s) of said device(s) so as to enable said movable member(s) to move at the same speed synchronously, and   f) transforming the various types of motion of said movable member into the vertical upward or downward linear motion of said board between the surface of said pool and the predetermined height.   
     
     
         2 . A system for covering a pool comprising:
 a) a board of rigid material of sufficient size to accommodate use for covering said pool and by a human being for standing, walking, working, and putting something on it, and   b) at least one device including a movable member and a fixed member for lifting said board being parallel with the surface of said pool vertically upward or downward, and   c) means for fixing one of the two members of each of said device(s) pointing to and being able to reach said board being in the state of covering normally said pool at appropriate fixing location(s) on the ground or somewhere in a building near said pool on the same side of said board but not on said board, said fixing location(s) allowing said board to move vertically and to get to a predetermined height, and   d) means for joining another one of the two members of each of said device(s) to said board being in the state of covering normally said pool at the about 90 degree included angle between the moving track of said device (or the plane in which said device moves) and said board at the appropriate location(s) being respectively corresponding to said fixing location(s), every included angle being required to be always equal and their vector sum of horizontal rays being required to be always zero when joining and in the lifting process so as to keep said board always horizontal and having no horizontal displacement, and   e) means for coupling a power transmission with said movable member(s) of said device(s) so as to enable said movable member(s) to move at the same speed synchronously, and   f) means for transforming the various types of motion of said movable member into the vertical upward or downward linear motion of said board between the surface of said pool and the predetermined height.