| 摘要 |
<p>An improved finger operated dispenser pump is disclosed. The pump is of the accumulative pressure type having an upper chamber and piston and a smaller diameter lower chamber and piston. A flexible dip tube (34) is attached to the stem of the lower piston (31) communicating with the passage therethrough, the dip tube (34) being of a smaller external cross section relative to the opening (61) in the lower chamber bottom and thereby providing a gas passage for priming, and is of a length to move the lowermost part of a container on depression of the piston to provide essentially complete removal of liquid contents of the container. </p> |
