Manually operated liquid dispenser

Abstract

The liquid dispenser disclosed herein comprises two telescoping sleeves, one sleeve having a base portion to be mounted on the mouth of a container and the other sleeve forming an actuator having a discharge aperture, and a pump unit sandwiched between said sleeves and having a pump cylinder, a piston mounted in said cylinder and having a tubular piston rod connected to the spray nozzle of the actuator, and a return spring between said pump cylinder and said actuator, said spring being isolated from the liquid being pumped. The pump unit may be assembled by machine and can be tested for leakage, prime retention and operability before being inserted between the telescoping base and actuator parts, the pump unit having as a unitary part thereof a dip tube adapter to extend into the container from which the liquid is to be dispensed. The pump unit, being self-contained, may be used with various base portions designed to be mounted on container necks of different diameters.

Dependencies are inferred from the claim text.