Patent ID: 8714413

Claim:
A liquid dispenser for dispensing a predetermined quantity of said liquid, comprising: a liquid reservoir having an openable refill lid that provides a substantially horizontal cover over said liquid reservoir; and a dispensing chamber assembly located substantially below, and in fluid contact with said liquid reservoir via a tube; wherein said dispensing chamber assembly comprises: an inner dispensing chamber comprising a hollow cylinder having a first closed end and a second open end, an inner inlet orifice located on a wall of said hollow cylinder and an inner outlet orifice located on a wall of said hollow cylinder; an outer dispensing chamber comprising a hollow cylinder sized and shaped to rotatably fit over said inner dispensing chamber, having a first closed end and a second open end, an outer inlet orifice located on a wall of said hollow cylinder and an outer outlet orifice located on a wall of said hollow cylinder; and a singular fluid sealing element located between said inner dispensing chamber and said outer dispensing chamber; said inner dispensing chamber being located within said outer dispensing chamber with said second open end of said inner dispensing chamber being positioned proximate to said closed end of the outer dispensing chamber; said inner dispensing chamber being rotatably adjustable between a first position and a second position; said first position comprising said inner inlet orifice and said outer inlet orifice being sufficiently aligned to allow fluid to flow, under gravity, from outside said outer dispensing chamber into said hollow cylinder of said inner dispensing chamber, and said inner outlet orifice being sufficiently out of alignment with said outer outlet orifice that substantially no fluid flows through either of said outlet orifices; said second position comprising said inner outlet orifice and said outer outlet orifice being sufficiently aligned to allow fluid to flow under gravity from said hollow cylinder of said inner dispensing chamber, to outside of said outer dispensing chamber, and said inner inlet orifice being sufficiently out of alignment with said outer inlet orifice that substantially no fluid flows through either of said inlet orifices, and said singular fluid sealing element having two holes aligned with the inlet orifice and the outlet orifice of the inner dispensing chamber, said fluid sealing element rotating with the inner dispensing chamber.