Manipulating liquid under condition of weightlessness
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United States of America Patent
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May 5, 1992
Grant Date -
N/A
app pub date -
Dec 13, 1990
filing date -
Dec 13, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Apparatus and method for handling liquid under conditions of weightlessness or near weightlessness includes a small tube being open at one end and closed at the other end except for a passage; normally the open end sits on an elastic nonwetting seal; the tube is moved towards and away from that seal; a plunger on a rod is movably disposed within the tube, and a liquid is kept in the space between the plunger and the open end; the rod is provided with two adjustable, spaced apart stops; and a stationary abutment limits plunger movement to range given by spacing between the stops, so that following evaporation of liquid of a drop that has formed on lift off of the tube, only the residual drop is sucked back into the tube without formation of bubbles.
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