Pressure balanced loading piston for triaxial test cells

Details Pressure balanced loading piston for triaxial test cells Pressure balanced loading piston for triaxial test cells

1986-03-27

1987-07-14

Myracle, Jerry W.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

73825, G01N 310

Patent

active

046794417

ABSTRACT:
A triaxial test cell and pressure balanced piston therefor that includes a housing containing a vessel wherein a test specimen is located, immerged in a confining fluid. The housing includes a passage wherein the piston is installed to slide so as to move an end thereof into the vesel, which passage includes an annular area formed intermediate therealong wherein a collar portion of the piston is fitted. The piston collar portion includes a face whose surface area is equal to the area of the piston end face that travels into the vessel, and the annular area above that collar upper face is connected by an open passage to that vessel. The piston and passage include appropriate ring seals for providing a pressure seal above and below the passage annular area and that annular area is separated by a pressure seal arranged around the piston collar, with the annular area below that collar vented to atmosphere.

REFERENCES:
patent: 3975950 (1976-08-01), Erdei

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