Sampling assembly for taking a sample of liquid at a desired lev

Details Sampling assembly for taking a sample of liquid at a desired lev Sampling assembly for taking a sample of liquid at a desired lev

1977-03-30

1978-02-21

Swisher, S. Clement

Measuring and testing

Measuring vessel

73297, G01N 116

Patent

active

040745775

ABSTRACT:
An assembly is provided for taking a sample from a desired level in a tank, including at least one tube extending from the outside of the tank to a selected level in the tank from where a sample is to be taken. The inner end of the tube is in fluid communication with a sampling chamber. The sampling chamber has an opening in its lower portion in communication with the inside of the tank through which liquid from the tank to be sampled may enter. The outer end of the tube is provided with a sampling valve for removing a sample from the tube. When the tank is not loaded, air enters the sampling chamber and the tube from within the tank and/or from the outside of the tank when the sampling valve is opened. The sampling valve is closed prior to loading the tank. The sampling chamber and the tube are sized such that the air pressure in the tube and in the sampling chamber prevent the liquid from entering the tube when the tank is filled. When the sampling valve is opened to take a sample the air pressure in the tube and in the sampling chamber is relieved. The pressure in the tank resulting from the weight of the lading and/or super-atmospheric pressure in the tank forces a liquid sample through the tube to the outside of the tank. A plurality of sampling assemblies may be provided each having a tube extending to a different level in the tank for taking samples from a plurality of levels in the tank. The outer ends of the sampling tubes, and the sampling valves are conveniently, though not necessarily, located at the bottom of the tank.

REFERENCES:
patent: 1509535 (1924-09-01), Werz
patent: 2090514 (1937-08-01), Folmsbee
patent: 2440230 (1948-04-01), Buttner

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