Removable closure system

A removable closure comprising:

• a tubular member having an inner end and an outer end, and an internal cylindrical surface defined by a first surface adjacent said inner end of a first internal diameter and a second surface adjacent the first surface of an enlarged internal diameter providing a circumferential ledge, and, in the second surface an increased internal diameter circumferential slot;
• a cylindrical plug of external diameter greater than the internal diameter of said tubular member first cylindrical surface and slightly less than said second cylindrical surface, the cylindrical plug being telescopically positionable within said tubular member second internal cylindrical surface and in engagement with said tubular member circumferential ledge;
• an expandable snap ring having a collapsed and an expanded condition and when in the collapsed condition having an external diameter less than said tubular member second internal diameter and in the expanded condition of diameter greater than said tubular member second internal diameter, the snap ring having a cross-section configuration dimensioned so that it is removably receivable in said expanded condition within said tubular member circumferential slot, and when in said circumferential slot having an internal diameter that is, at least in part, less than said tubular member second internal diameter whereby when the snap ring is in expanded position within said slot said plug is captured between said circumferential ledge and the snap ring;
• and
• linkage mechanism engaged with said snap ring and moveable between a first position and a second position, in the linkage mechanism first position said snap ring is radially inwardly collapsed and of external diameter less than said tubular member second cylindrical surface and in the linkage mechanism second position said snap ring is radially outwardly expanded and partially received in said tubular member circumferential groove.