Measuring and testing – Sampler – sample handling – etc. – Plural parallel systems
Reexamination Certificate
2005-09-27
2005-09-27
Raevis, Robert (Department: 2856)
Measuring and testing
Sampler, sample handling, etc.
Plural parallel systems
C073S864220
Reexamination Certificate
active
06948390
ABSTRACT:
The present invention is directed to a flow through pipet for sample measurement. The pipet of the invention has a body defining an interior space for receiving a fluid. The drain line is provided to drain fluid above a drain line inlet, thereby establishing a repeatable upper fluid level in the body. A dispense valve on the lower end of the body selectively permit dispensing of the fluid from the body. A restriction member may be located in the interior space of the body for defining a passageway. The drain line inlet may communicate with the passageway to establish a smaller surface area for an upper surface of the fluid, thereby minimizing a variance in the fluid level. A vent line vents gas from the measuring chamber during filling of a fluid. The pipet of the invention is particularly suitable for use in an automated system due to the top fill feature, which eliminates the need for cycling back and forth between a fill vessel and a dispense vessel. Additionally, the invention is suitable for use in an automated system utilizing a multi-pipet assembly, wherein multiple pipets may be filled simultaneously or in any manner desired.
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Fellers Snider Blankenship Bailey & Tippens, P.C.
Raevis Robert
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