Patent ID: 8267108

Claim:
A system ( 99 ) for dispensing a second liquid ( 20 ) proportionally into a first liquid ( 10 ), the system ( 99 ) comprising: a reservoir ( 12 ) defining a top level ( 13 ) and a bottom level ( 11 ) and having an opening ( 19 ) at the top level of said reservoir ( 12 ) for receiving said first liquid ( 10 ); a container ( 22 ) for holding said second liquid ( 20 ), said container ( 22 ) defining a top and a bottom, the bottom of said container ( 22 ) elevated above the top level ( 13 ) of said reservoir ( 12 ); a dispensing vessel ( 100 ) defining a top level ( 102 ) and a bottom level ( 101 ), said dispensing vessel ( 100 ) equal to the height (h) of said reservoir ( 12 ) and disposed elevationally level therewith; a hydrostatic chamber ( 130 ) defining a top and a bottom, the bottom of said hydrostatic chamber ( 130 ) fluidly coupled to the bottom level ( 11 ) of said reservoir ( 12 ), the top of said hydrostatic chamber ( 130 ) fluidly coupled to the top level ( 102 ) of said dispensing vessel ( 100 ); a three-way valve ( 150 ) having first, second and third ports ( 152 , 151 , 153 ), said container ( 22 ) fluidly coupled to said third port ( 153 ), said bottom level ( 101 ) of said dispensing vessel ( 100 ) fluidly coupled to said first port ( 152 ), and the top level ( 13 ) of said reservoir ( 12 ) fluidly coupled to said second port ( 151 ), a first valve position connecting said first port ( 152 ) and said second port ( 151 ) while isolating said third port ( 153 ) and a second valve position connecting said first port ( 152 ) and said third port ( 153 ) while isolating said second port ( 151 ).