Reverse osmosis water purifying system

In a reverse osmosis storage and recovery system including a R.O. module with a R.O. membrane therein, unpurified water being on an inlet side of said module and purified water on an opposite side thereof, said system including a container member having a slideably mounted piston member therein and said unpurified water being on opposite sides of said piston member, wherein the improvement comprises:

• a control means having a second slideably mounted piston member positioned therein;
• said control means having a first end in fluid communication with said unpurified water and having a second end in fluid communication with said purified water;
• a bias means positioned within said control means, said bias means and pressure of said purified water combining to urge said control means piston member into an at rest position when said container member is full of purified water
• the strength of said bias means being preselected so that said strength is insufficient to maintain said control means piston member in its at rest position when said container member is not full of purified water;
• whereby a call for service effects unseating of said control means piston member from its at rest position by reducing the pressure of said purified water within said control means;
• whereby said unseating of said control means piston member effects circulation of water through said system;
• whereby a call for service that empties said system of purified water is operative to fully compress said bias means and to thereby position said closure means piston member in a position opposite to its at rest position;
• wherein said control means includes a storage port means positioned mid-length of said control means, a bleed port means and a drain port means formed in said control means in circumferentially spaced and flanking relation to said storage port means, a plurality of O ring members that isolate said port means from one another, and wherein said control means piston member is provided with means defining a pair of spaced annular grooves formed therein that selectively align with preselected O ring members to control the circulation of water through said control means responsive to changes in condition of said system.

A reverse osmosis storage and recovery system, comprising:

• a R.O. module;
• a storage container member;
• said storage container member having a collapsible bag member therein that retains purified water from said R.O. module;
• said storage container member having purified water therein that surrounds said bag member and which exerts a pressure thereagainst;
• a control means that governs the circulation of purified and unpurified water through the system;
• said control means having an inlet port means in fluid communication with unpurified water;
• said control means having a control port means in fluid communication with purified water;
• said control means having a slideably mounted piston member disposed therein which separates unpurified water from purified water;
• said control means piston member biased by a mechanical bias means and by pressure of purified water into an at rest positon which closes the inlet and control port means of said control means when said bag member is full of purified water;
• said bias means being preselected so that removal of purified water from said bag member effects displacement of said closure means piston member, which displacement opens said inlet and control port means of said control means;
• said control means further comprising a storage port means, a bleed port means, and a drain port means the opening and closing of which is also effected by the reciprocation of said closure means piston member;
• said closure means piston member including means defining a pair of longitudinally spaced annular grooves, wherein said closure means includes a plurality of O ring members, and wherein selective registration of said annular grooves and associated O ring members effects operation of said system.