Patent ID: 8882738

Claim:
A vial adaptor assembly for withdrawing medicinal fluid from a vial, the assembly comprising: a housing portion comprising: a medical connector interface configured to couple the vial adaptor assembly with a medical device such that an interior of the medical device is placed in fluid communication with an interior of the vial when the vial adaptor assembly is coupled with the vial; a piercing member configured to pierce a septum of the vial; and a sheath having a first slot portion and a second slot portion; an insertion member movable independent of the piercing member, the insertion member comprising a regulator channel, wherein the regulator channel is configured to permit ambient air to flow into the regulator channel as medicinal fluid is withdrawn from the vial, thereby equalizing pressure within the vial; and a locking mechanism configured to secure the housing portion to the insertion member, wherein the locking mechanism comprises one or more clips connected to the housing portion, the locking mechanism having a first position and a second position, wherein in the first position the one or more clips are in a closed position and adapted to secure the insertion member to the housing portion, and wherein in the second position the one or more clips are in an open position and adapted not to secure the insertion member at least partially within the piercing member and to the housing portion.