Abstract: A closure for containers provided with one or more closure projections adapted to cooperate with means on the container for securing the closure in sealing position over the open mouth of the container. The closure of the invention can be used with containers designed for child resistant packaging or with containers designed for conventional closures. The closure includes a top wall and a depending skirt portion. One or more locking projections are formed on the inner wall surface of the skirt portion. The locking projection has an upper surface facing the top wall of the closure on which is formed a lug which extends parallel to the axis of the closure so that the locking projection has a generally inverted T-shaped configuration including a pair of oppositely extending arms which extend normal to the lug. The extending arms define support surfaces which cooperate with the securing means of the container to prevent cocking or tilting of the closure when in the locked and sealed position on the container.

Abstract: A tamper resistant package consisting of a container and removable closure includes sealing means comprising an insert disposed in the interior of the container for sealing the container. The insert includes a tear-away section and a tab affixed to the insert at the tear-away section. The tab normally extends upwardly for removing the tear-away section when it is desired to open the container. If the tear-away section is partially or completely broken away from the body of the insert the user is provided with a positive, readily ascertainable indication that the package has been previously opened and possibly tampered with.

Abstract: An improved child resistant package comprising a container and closure and resilient means for normally urging the closure axially away from the container when the container is sealed by the closure. Cooperating sets of locking elements rim the container adjacent its mouth and are disposed about the inner surface of the depending skirt portion of the container for locking and maintaining the closure in a sealed position over the mouth of the container. One set of the locking elements comprise pairs of spaced apart projections which define a through-running channel therebetween. The other set of locking elements comprise corresponding latch members, each of which defines a stop element which is received in through-running channels and a retaining portion which acts against one of the paired projections to retain the closure from axial movement in opposition to the urging of the resilient member.

Abstract: The combination of a multi-functional closure and container including an open neck portion. The closure includes a top wall, a resilient member carried by the top wall and a depending skirt portion for receiving the open neck portion of the container. Corresponding locking lugs are disposed about the inner wall of the cylindrical skirt portion of the closure and the outer wall of the neck portion of the container adapted to permit the closure to operate in a safety lock mode, a twist-on mode and a snap-on mode.Each of the locking lugs of the container comprise a bayonet lug including an elongated axially extending member and a leading end member extending normal to the elongated portion. An enlarged area is provided on the leading end member and spaced from the elongated axially extending member to define an indent to provide the safety lock feature.

Abstract: A single piece threaded safety closure for sealing the open end of a container. At least three enlarged members are equi-angularly spaced about the closure thread and form locking shoulders adapted to inter-engage corresponding shoulders defined on the thread of the container to lock the threads together and prevent removal of the closure except by special manipulation. A resilient liner is compressed when the closure is drawn down on the container and the compressed resilient liner urges the cap upwadly and maintains the shoulders in locked engagement.

Abstract: A single piece, threaded safety closure cap for sealing the open end of a container. The closure thread is continuous and a locking shoulder is integrally formed along the upper surface of the thread for engagement with a corresponding locking shoulder disposed on the lower face of the container thread when the closure is in sealing position on the open end of the container to prevent removal of the closure by simple reverse rotation.