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Title: Extreme pressure fluid sample transfer pump

Abstract

A transfer pump for samples of fluids at very low or very high pressures comprising a cylinder having a piston sealed with an O-ring, the piston defining forward and back chambers, an inlet and exit port and valve arrangement for the fluid to enter and leave the forward chamber, and a port and valve arrangement in the back chamber for adjusting the pressure across the piston so that the pressure differential across the piston is essentially zero and approximately equal to the pressure of the fluid so that the O-ring seals against leakage of the fluid and the piston can be easily moved, regardless of the pressure of the fluid. The piston may be actuated by a means external to the cylinder with a piston rod extending through a hole in the cylinder sealed with a bellows attached to the piston head and the interior of the back chamber.

Inventors:
 [1];  [2]
  1. (Grovertown, GA)
  2. (North Augusta, SC)
Issue Date:
Research Org.:
E I DUPONT DE NEMOURS & CO INC
OSTI Identifier:
867625
Patent Number(s):
4975027
Assignee:
United States of America as represented by United States (Washington, DC) SRS
DOE Contract Number:  
AC09-76SR00001
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
extreme; pressure; fluid; sample; transfer; pump; samples; fluids; pressures; comprising; cylinder; piston; sealed; o-ring; defining; forward; chambers; inlet; exit; valve; arrangement; enter; leave; chamber; adjusting; differential; essentially; zero; approximately; equal; seals; leakage; easily; moved; regardless; actuated; means; external; rod; extending; bellows; attached; head; interior; transfer pump; pressure fluid; fluid sample; approximately equal; pressure differential; piston rod; o-ring seal; rod extending; o-ring seals; valve arrangement; extreme pressure; means external; /417/

Citation Formats

Halverson, Justin E., and Bowman, Wilfred W. Extreme pressure fluid sample transfer pump. United States: N. p., 1990. Web.
Halverson, Justin E., & Bowman, Wilfred W. Extreme pressure fluid sample transfer pump. United States.
Halverson, Justin E., and Bowman, Wilfred W. Mon . "Extreme pressure fluid sample transfer pump". United States. https://www.osti.gov/servlets/purl/867625.
@article{osti_867625,
title = {Extreme pressure fluid sample transfer pump},
author = {Halverson, Justin E. and Bowman, Wilfred W.},
abstractNote = {A transfer pump for samples of fluids at very low or very high pressures comprising a cylinder having a piston sealed with an O-ring, the piston defining forward and back chambers, an inlet and exit port and valve arrangement for the fluid to enter and leave the forward chamber, and a port and valve arrangement in the back chamber for adjusting the pressure across the piston so that the pressure differential across the piston is essentially zero and approximately equal to the pressure of the fluid so that the O-ring seals against leakage of the fluid and the piston can be easily moved, regardless of the pressure of the fluid. The piston may be actuated by a means external to the cylinder with a piston rod extending through a hole in the cylinder sealed with a bellows attached to the piston head and the interior of the back chamber.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {1}
}

Patent:

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