Volumetric fluid dispensing apparatus

A fluid dispensing apparatus for dispensing a predetermined volume of fluid comprising:

• a) a fluid reservoir housing a fluid input connected to a fluid supply;
• b) an external bladder connected to an upper portion of said fluid reservoir which expands and contracts to maintain the internal pressure within said fluid reservoir constant;
• c) a fluid output in said fluid reservoir for dispensing fluid from said reservoir;
• d) a discharge valve connected to said fluid output for selectively dispensing fluid from said fluid reservoir when said discharge valve is open;
• and
• e) an electronic controller operatively connected to said discharge valve for selectively opening and closing said discharge valve to dispense a predetermined volume of fluid from said fluid reservoir.

A fluid dispensing apparatus for dispensing a predetermined volume of fluid comprising:

• a) a fluid reservoir having a fluid input connected to a fluid supply by a fluid supply line;
• b) a supply valve disposed in said fluid supply line;
• c) a fluid output in said fluid reservoir for dispensing fluid from said fluid reservoir;
• d) fluid level regulating means for maintaining a predetermined fluid level in said fluid reservoir, said fluid level regulating means including:
• i) a measuring tube forming a closed loop on said fluid reservoir, said measuring tube having a first end connected to the fluid reservoir below said predetermined fluid level, and a second end connected to said fluid reservoir above said predetermined fluid level;
• ii) a fluid level sensor disposed along said measuring tube between said first and second ends for detecting the level of fluid in said measuring tube;
• and
• iii) a controller for said supply valve which causes said supply valve to open when the fluid level in said measuring tube falls below said fluid level sensor;
• e) a discharge valve connected to said fluid output for dispensing fluid from said fluid reservoir when said valve is open;
• and
• f) an electronic controller for selectively opening and closing the discharge valve to dispense a predetermined volume of fluid from said fluid reservoir.