Liquid sampling method and apparatus

Details Liquid sampling method and apparatus Liquid sampling method and apparatus

1990-12-19

1992-06-16

Williams, Hezron E.

Measuring and testing

Sampler, sample handling, etc.

Capture device

7386401, B01L 302

Patent

active

051216426

ABSTRACT:
An apparatus and method for sampling liquids is disclosed. The apparatus includes a pipet having a chamber, a first opening at one end for introducing liquid into the chamber, and a second opening at the other end for introducing or removing a gas for respectively pressurizing or depressurizing the chamber. Positioned in the chamber is a freely movable first sealing member having a specific gravity greater than the specific gravity of the liquid and a first seat, for cooperatively containing a sample of liquid in the chamber. Also positioned in the chamber is a freely movable second sealing member having a specific gravity less than the specific gravity of the liquid and a second seat, for cooperatively limiting further flow of liquid into the chamber once a sample is obtained. Equipment for introducing or removing a gas is also provided.

REFERENCES:
patent: 2396470 (1946-03-01), Mortensen
patent: 2959964 (1960-11-01), Streitfeld
patent: 3451273 (1969-06-01), Ludlow
patent: 3465595 (1969-03-01), Tansony
patent: 4046011 (1977-09-01), Olsen
patent: 4248830 (1981-02-01), Kallies et al.
patent: 4271704 (1981-06-01), Peters
patent: 4900515 (1990-02-01), Miramanda

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