Valve accelerating type dispensing pump

A method of dispensing liquid, the method comprising:

• providing a liquid dispensing pump which comprises:
• a cam rotatable about a rotational axis and comprising a cam surface around the rotational axis,
• a cam follower biased toward the cam surface and configured to travel along the cam surface for reciprocating movement along a first direction,
• a valve assembly comprising a valve and a nozzle, wherein the valve is configured to move relative to the nozzle, the valve being coupled to the cam follower to transfer the cam follower's reciprocating movement to the valve such that the valve moves toward and away from the nozzle along the first direction, and
• an accelerating member assembled with the cam follower such that the accelerating member ascends and descends along the first direction together with the cam follower and further such that the cam follower rotates relative to the accelerating member about the rotational axis as the cam follower descends along the first direction;
• supplying liquid to the valve assembly;
• and
• rotating the cam about the rotational axis to cause the cam follower to travel along the cam surface for reciprocating movement thereof along the first direction, and further to cause the cam follower to rotate relative to the accelerating member about the rotational axis as the cam follower descends along the first direction.