초록 ▼

Apparatus and method for measuring a rate of leakage from a closed vessel enclosed in a container. Air is expelled from the container and a charge of helium-free gas is introduced. The preferred container is comprised of flexible sheets with mating edges sealed together. The flexible container is co

Apparatus and method for measuring a rate of leakage from a closed vessel enclosed in a container. Air is expelled from the container and a charge of helium-free gas is introduced. The preferred container is comprised of flexible sheets with mating edges sealed together. The flexible container is collapsed when air is expelled, and then limply charged with a known volume of helium-free gas. The vessel is pressurized with helium, the rate of accumulation of which is measured in the container gas to determine the leakage from the vessel.

대표청구항 ▼

A collapsible container for enclosing a vessel for leakage rate measurement, said container comprising: (a) at least one flexible sheet folded around the vessel with the mating edges of said sheet sealed to each other to seal the container around the vessel; (b) a port located opposite a portion of

A collapsible container for enclosing a vessel for leakage rate measurement, said container comprising: (a) at least one flexible sheet folded around the vessel with the mating edges of said sheet sealed to each other to seal the container around the vessel; (b) a port located opposite a portion of the container which is capable of being collapsed against said port so as to close said port and (c) an opening in said container for protrusion of and means for sealing around an extension from the vessel, said means for sealing comprising a layer of tape affixed to the protruding extension, a coating of vacuum sealant applied to the tape, the edges of the container openings conformed to the tape, and a band placed therearound.