Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1990-06-04
1994-04-19
Raevis, Robert
Measuring and testing
Sampler, sample handling, etc.
Capture device
7386467, G01L 104
Patent
active
053036000
ABSTRACT:
A flexible inert gas impervious housing for the sampler which can be squeezed to an essentially flat configuration in conjunction with a close/open/close valve assembly at both ends of the flexible housing that the buoyancy can be minimized by applying a vacuum to the flexible inert gas impervious housing prior to positioning the same on the sampler array, or prior to securing to a sampler cable for lowering into a body of water is disclosed. Pressure release means are provided to optionally open the valve assemblies when a preselected pressure is reached, usually coordinated with depth of immersion, at which time the sampler flexible housing has the vacuum released and it opens and is flushed by the fluid through which it is passing. Thereafter, means are provided to close the two valve assemblies to entrap the sample, based upon a signal, and to return the sample for discharge from the sampler for further investigation. The method of operation is directed to the sequence of using a sampler in which the valve assemblies are, in coordinated manner, moved to the closed configuration while at the same time storing potential energy in a spring for driving the valve from its closed position to a first open position, and thereafter driving the valve again to a closed position.
REFERENCES:
patent: 3242740 (1966-03-01), Niskin
patent: 3489012 (1970-01-01), Niskin
patent: 4302974 (1981-12-01), Niskin
patent: 4852413 (1989-08-01), Niskin, deceased et al.
Banu John I.
Wood Richard F.
Dominik Jack E.
General Oceanics, Inc.
Raevis Robert
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