Patent ID: 8657145

Claim:
A system for sealing a port of a container, wherein the container is configured to hold an above-atmosphere pressure fluid, the system comprising: an integral access port assembly having an axis therethrough, said access port assembly comprising: a lower rim connected to the port of the container; an upper rim axially opposite the lower rim; a threaded portion of an outer surface of the access port assembly; a sealing surface having an inner diameter, wherein the inner diameter near the lower rim is less than the inner diameter near the upper rim; and a cap comprising: a sealing surface operable to engage the sealing surface of the access port assembly to provide a seal therebetween, sealing the port of the container via a single leakage path; a longitudinal recess radially inward of the sealing surface of the cap; a first shoulder extending radially outward of the sealing surface of the cap, wherein the first shoulder is operable to engage the upper rim of the access port assembly and limit travel of the cap into the access port assembly, preventing deformation of the sealing surface of the access port assembly and sealing surface of the cap; and a second shoulder extending axially from the first shoulder, the second shoulder opposing the first shoulder; and a clamping arrangement operable to axially force the sealing surface of the cap into the access port assembly, the clamping arrangement comprising: a threaded portion on an inner surface of the clamping arrangement, wherein the threaded portion of the clamping arrangement is operable to engage the threaded portion of the access port assembly; and a shoulder portion operable to engage the second shoulder of the cap and push the sealing surface of the cap against the sealing surface of the access port assembly.