Abstract: A nested set of containers sealed with a single lid. The lid contains at least one perforation, or weak section, to allow the lid to tear along the perforation at a point between the edge of the outer container and the edge of the inner container, so that removing the lid to the perforation allows for the inner container to remain sealed. The remaining seal outer container edge can then be easily removed without breaking the seal on the inner container. In one embodiment, two or more perforations may be included, each with an adjacent tab to ease removal. The invention includes a method of removing the lid in such a way that the perforation provide for ease of access to the outer container without breaching the inner container.

Abstract: A lid, having an opening area encased by one of the variety of shaped sidewalls with a flexible ribbed portion extending downwardly to one of the variety of shaped bases is provided for completely purging of atmospheric gases out of a container upon installation so as to eliminate head space by forming an airtight barrier with the container and the lid. A lid rim, having an inside portion connected to the top of the one of the variety of shaped with the flexible ribbed portion and an outside portion is provided for seating the lid to the container. The dome shaped base is connected to the bottom of the one of the variety of shaped side walls forming a circular base of the lid.

Abstract: A lid, having an opening area encased by one of the variety of shaped sidewalls with a flexible ribbed portion extending downwardly to one of the variety of shaped bases (e.g., a domed shaped base), is provided for completely purging of atmospheric gases out of a container upon installation so as to eliminate head space by forming an airtight barrier with the container and the lid. A lid rim, having an inside portion connected to the top of the one of the variety of shaped with the flexible ribbed portion and an outside portion is provided for sealing the lid to the container. The dome shaped base is connected to the bottom of the one of the variety of shaped sidewalls forming a circular base of the lid. The one of the variety of shaped sidewalls is provided for manipulating the lid from a relaxed state to an elongated state while being submerged into a liquid to displace an amount of fluid needed to raise the fluid level.

Abstract: An inflatable evacuation slide has a pressure relief valve in at least one of the inflatable support tubes. The pressure relief valve has a “floating” lifter that slidingly engages the valve stem of the poppet valve portion of the pressure relief valve. Because the lifter floats on the valve stem, the lifter cannot load the poppet valve in compression. When the poppet valve opens, however, air pressure acting on the lifter causes the lifter to engage a stop at the end of the valve stem, which enables the lifter to fully open the poppet.

Abstract: An inflatable evacuation slide system includes an inflatable evacuation slide stored in a packboard compartment the cover panel of which is retained by a plurality of frangible pneumatic latches. The frangible pneumatic latches each comprise a tension member one end of which is attached to the packboard housing and the other end of which is releasably attached to the cover panel. In normal operation, a pneumatic signal operating on an actuator piston withdraws the piston to allow the latch mechanism to release the cover panel. In the event of a failure of the release mechanism, since the releasable latch secures the cover panel to the frangible tension member rather than to the packboard directly, the force of the inflating evacuation slide breaks the frangible member allowing the cover panel to drop away with only a brief delay in slide deployment.