Adjustable-volume liquid dispensing pump

An adjustable-volume liquid dispenser, comprising:

• a spout;
• a plunger secured to the spout;
• a spacer ring disposed on the plunger, wherein the spacer ring comprises an orifice through which the plunger passes;
• 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.

A method for dispensing a liquid from a liquid container, wherein the liquid container contains the liquid, comprising:

• (A) submersing a shaft in the liquid, wherein the shaft is secured to a chamber;
• (B) drawing the liquid into the chamber through the shaft, comprising applying a force to a spout to depress a plunger into the chamber, and removing the force to allow a spring to return the plunger to about an original position, wherein an adjustable-volume liquid dispenser comprises the shaft, the chamber, the spring, and the spout, and further comprises:
• the 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 passes through the plunger lock opening as the plunger lock is moved lengthwise along the plunger, and wherein the plunger lock is disposed within the chamber;
• the spring in contact with the plunger;
• the chamber comprising an interior for containing the 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;
• 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
• (C) applying force to the spout to dispense the liquid.