Taper well meter dose pump
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United States of America Patent
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May 10, 2005
Issued Date -
N/A
app pub date -
Jul 15, 2002
filing date -
Jun 4, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A dispensing device includes a hollow body coupled to a pump mechanism having a dip tube, and to a follower piston. A well provided in the piston is generally larger in diameter than the dip tube to allow fluid in the chamber to flow down into the well as the dip tube enters the well to facilitate fluid removal after a significant portion of the fluid has been removed. In some aspects, the well walls and dip tube end are substantially conical shaped with the well walls substantially parallel to the dip tube end or having a greater angle relative to the axis of the dip tube
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