POSITIVE DISPLACEMENT DISPENSER AND METHOD FOR DISPENSING DISCRETE AMOUNTS OF LIQUID

摘要

A dispenser for applying small amounts of liquid to a substrate. The dispenser includes a dispenser body, an actuator in the dispenser body, and a dispensing element including a dispensing element body removably coupled to the dispenser body. A valve stem is mounted for reciprocating movement within the dispensing element body. Additional aspects include a deformable valve seat, a deformable and resilient valve stem tip and a method of applying liquid in discrete amounts to a substrate.

主权项

1. A dispenser for applying small amounts of liquid to a substrate, the dispenser comprising:
a dispenser body; a valve stem mounted for reciprocating movement within said dispenser body, said dispenser body further including a liquid chamber and said valve stem including a tip mounted for reciprocating movement within said liquid chamber between open and closed positions; and a valve seat in said dispenser body engaging said valve stem tip in the closed position; wherein said valve stem tip is formed from a deformable, resilient material, said valve stem tip being deformed against said valve seat when said valve stem moves to the closed position thereby damping impact of the valve stem tip against said valve seat and forming an area of sealing contact between said valve stem tip and said valve seat.