Extreme pressure fluid sample transfer pump

Patent · Mon Jan 01 04:00:00 EST 1990

OSTI ID:867625

Halverson, Justin E ^[1]; Bowman, Wilfred W ^[2]

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1. Grovertown, GA
2. North Augusta, SC

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.

• Research Organization: E I DUPONT DE NEMOURS & CO INC
• DOE Contract Number: AC09-76SR00001
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4975027
• OSTI ID: 867625
• Country of Publication: United States
• Language: English

Related Subjects

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actuated
adjusting
approximately
approximately equal
arrangement
attached
bellows
chamber
chambers
comprising
cylinder
defining
differential
easily
enter
equal
essentially
exit
extending
external
extreme
extreme pressure
fluid
fluid sample
fluids
forward
head
inlet
interior
leakage
leave
means
means external
moved
o-ring
o-ring seal
o-ring seals
piston
piston rod
pressure
pressure differential
pressure fluid
pressures
pump
regardless
rod
rod extending
sample
samples
sealed
seals
transfer
transfer pump
valve
valve arrangement
zero