Movable umbrella holder

A movable umbrella holding structure, comprising:

• a rail assembly including at least two vertical poles configured to be securable to ground or to bases;
• a support rail connected to said vertical poles, the rail assembly further including a plurality of internal trusses positioned within said support rail to increase structural strength;
• a holder assembly including a holder base slidably mounted on said support rail;
• a pole holder perpendicularly connected to said holder base;
• said pole holder configured to receive and secure a sun umbrella;
• said holder base comprising ball bearings, wheels or rollers to facilitate movement along the support rail;
• a locking mechanism on said holder assembly, operable to selectively fix the position of said holder base along said support rail;
• wherein said pole holder further includes multiple diameter-reducing inserts to accommodate umbrella poles of different diameters;
• a rotating table;
• a pivoting mechanism allowing tilting of the umbrella pole;
• stoppers to limit the range of tilting;
• a hook for hanging accessories;
• a storage compartment;
• wherein said holder assembly is moveable along said support rail to adjust the position of a sun umbrella without relocating said vertical poles or the base of said sun umbrella;
• wherein said rail assembly and said holder assembly are comprised of materials resistant to corrosion in outdoor environments;
• wherein said holder assembly is adaptable to be incorporated into a chair frame.

A movable sun umbrella holding structure, consisting of:

• a rail assembly consisting of:
• a support rail having a length and having internal trusses arranged in a triangular pattern to increase structural strength;
• first and second vertical posts, each post having a lower end configured with a sharpened portion for ground insertion or a base plate for surface mounting, wherein said posts are removably secured to opposing ends of said support rail and oriented perpendicular to a longitudinal axis of said support rail;
• a holder assembly consisting of:
• a holder base having a hollow interior shaped to slidably receive said support rail;
• a set of ball bearings or rollers mounted within said holder base to facilitate sliding movement along said support rail;
• a pole holder extending perpendicularly from said holder base;
• a first locking mechanism mounted on said holder base for securing the holder base position along said support rail;
• a second locking mechanism mounted on said pole holder for securing an umbrella pole;
• a set of diameter-reducing inserts configured to be selectively inserted into said pole holder to accommodate different umbrella pole diameters;
• a pivot mechanism connecting said pole holder to said holder base, said pivot mechanism including a hinge and a pivot lock for adjusting and fixing a tilt angle of said pole holder;
• mechanical stops mounted to limit the range of said tilt angle;
• a rotating table mounted around said pole holder;
• at least one hook mounted on said pole holder for hanging accessories;
• and a storage compartment mounted to said pole holder;
• wherein said holder assembly is moveable along said support rail to adjust the position of a sun umbrella without relocating said vertical posts;
• wherein said rail assembly and said holder assembly are comprised of corrosion-resistant materials selected from the group consisting of stainless steel, coated metals, and reinforced plastics;
• and wherein said holder assembly is configured to be mounted to a chair frame through mounting clamps.