Patent ID: 8261949

Claim:
An adjustable-volume liquid dispenser, comprising: a spout; a plunger secured to the spout; a plunger lock moveable lengthwise along the plunger, wherein the plunger lock is securable to the plunger at a plurality of positions on the plunger to adjust a volume of liquid to be dispensed, and wherein the plunger lock comprises a plunger lock opening, and further wherein the plunger is disposed to pass through the plunger lock opening as the plunger lock is moved lengthwise along the plunger; a spring in contact with the plunger; a chamber comprising an interior for containing liquid, wherein the plunger is slidably arranged with the chamber, and wherein a portion of the plunger is disposed within the chamber; a chamber cap secured to the chamber, wherein the spring is disposed between the spout and the chamber cap; a collar, wherein the plunger extends into the chamber through the chamber cap and the collar, and wherein the collar comprises a collar neck, and further wherein the collar neck interfaces with the chamber cap; a valve disposed within the chamber; and a shaft secured to the chamber.