Abstract: The invention relates to a safety closure device 1 for a container, the device including an inner and an outer cap coacting together. On initial depression of the outer cap 3 of the device when on a neck of a container, the lower (as viewed) surface of a frangible disc 18 in the outer cap bears on the upper surfaces (as viewed) of a boss 17 on the inner cap. The boss has a greater diameter than the disc 18 but a smaller diameter than a circular aperture in the outer cap 3 in which the disc 18 is situated. The boss 17 rides into the aperture when pressure is applied to the outer cap, bearing on lugs 19 and 20 holding disc 18 and rupturing them; the pressure being considerably increased where the lugs bear on the sharp edge of the boss at the transition from the uppermost surface to the boundary wall thereof. The disc 18 is released when lugs 19 and 20 rupture, to "spring" out of the aperture and away from the closure device leaving a circular hole behind.

Abstract: A closure device for screw-threaded cylindrical container openings comprises inner and outer closure members having a first drive arrangement therebetween for turning the device clockwise to mount same to close the opening. A second drive arrangement comprises a hexagonal projection and a hexagonal orifice on the members which engage on application of axial pressure to the device to permit, on applying an anti-clockwise torque, unscrewing of the device from the opening. The orifice may be initially closed by a cover secured to the boundary by the orifice by frangible connectors which are fractured by the projection on initial axial pressure being applied. This provides a tamper evident feature. In other embodiments, a cover has a manually graspable tab for tearing it from the opening before axial pressure is applied.

Abstract: A closure device for a container such as a medicine bottle having inner and outer caps, biassed axially apart, each cap comprising respectively an end member and a skirt member, there being a first drive between the skirt members and a second drive between the end members.