Liquid pin transfer assembly with common pin bias
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Aug 26, 2003
Grant Date -
Dec 6, 2001
app pub date -
Feb 5, 2001
filing date -
May 31, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Several pin transfer assemblies are disclosed that utilize the surface tension of liquids for picking up and dispensing minute volumes of liquid from wells in a first well plate to a flat substrate surface or into wells in a second well plate. In one embodiment, a plurality of pins reciprocate through complementary arrays of holes in a base plate and an overlying spring plate biased apart by coil springs located around the periphery of the base plate. A foam layer sits on top of the spring plate and a weight plate sits on top of the foam layer. A single coil spring is positioned between a center of the weight plate and the cover to push the weight plate downwardly. The periphery of the cover guides the vertical movement of the weight plate and is connected to the periphery of the base plate. The periphery of the base plate is supported by a frame used to register the pin assembly in a receptacle of a manual or automated liquid transfer apparatus.
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