Measuring and testing – Sampler – sample handling – etc. – Capture device
Reexamination Certificate
2005-01-04
2005-01-04
Garber, Charles D. (Department: 2856)
Measuring and testing
Sampler, sample handling, etc.
Capture device
C073S864630
Reexamination Certificate
active
06837120
ABSTRACT:
A no purge sampler for collecting fluid samples includes a flexible tube having a sealed first end and a second end, the tube defining an interior cavity, a buoyancy-compensating ballast compartment secured to the tube, and a check valve disposed at the second end of the tube. To collect fluid samples, the no purge sampler is lowered into the fluid to be sampled. The buoyancy-compensating ballast compartment is filled with an appropriate ballast to allow the sampler to sink to a desired level. Once the sampler reaches the desired depth, the sampler is moved up and down to pump water into the collapsed tube. The check valve is opened each time the sampler is pulled upwards allowing fluid to enter the interior cavity. The up and down motion is repeated until the interior cavity of the tube is filled with fluid. Once the interior cavity is filled, the pressure of the fluid in the tube causes the check valve to close, thereby preventing additional fluid from entering the interior cavity. The sampler is then pulled out of the fluid without losing any of the fluid in the interior cavity of the tube or the sample contaminated with any extraneous fluid.
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US Water News, “New ground water sampler promises to do more with less”, Apr. 1999.*
Alexander et al., “Field Trial of a New Commercially Available Diffusive Ground-Water Sampler,” Bunnell-Lammons Engineering, Inc. Greensville, South Carolina, 6 pages.
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Christie Parker & Hale LLP
Garber Charles D.
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