The present invention is directed to a child resistant double seam container lid including an adapter ring for securely affixing to the double seam top rim of conventional double seamed containers that will be difficult for children to open, yet readily openable by adults. More particularly, a one-piece, two-piece, and three-piece child resistant double seam affixable container lid is provided having a first piece lid portion first, a second piece adapter ring locking member second piece and optionally a third piece securing unit piece, with rotational alignment indicators, and optional additional integral features such as a liquid measuring cup feature, a liquid tight lid feature, a threaded lid portion, a replaceable double seam container lid portion and a double seam container lid locking member adapter ring securely affixable to the double seam container.

A package seal for sealing engagement between a closure and a container, and including an elastomeric seal ring with a sealing portion, and a plastic projection coupled to the seal ring.

A closure device designed to be put in place on, or removed from, a container, including a cap carrying at least two security projections, each provided with an axial locking abutment that can be moved radially between a cooperation position, in which the axial locking abutment engages with an axial locking abutment carried by the container, in order to hold the cap on the container, and a separation position, in which the axial locking abutment is separated from the axial locking abutment carried by the container. The closure device further includes a security ring snap-fitted onto the cap. The security projections are arranged on an internal surface of the security ring and the radial position of each axial locking abutment changes, by ovalization, from its cooperation position to its separation position.

An internal cap member intended to be placed on the container. The internal cap member carries a security ring including a security element including a locking abutment mobile radially between a cooperation position, favored by elastic biasing, in which the locking abutment cooperates with a complementary locking abutment carried by the container, and a separation position, in which the locking abutment is separated from the complementary locking abutment. The security ring is mobile axially on the cap. The closure device also includes an element for transforming the axial movement of the security ring into radial movement of the security element, making it possible for the radial position of the locking abutment to change from its cooperation position to its separation position.

A sealable powder box of the present application comprises an upper casing, a lower casing, an inner casing mounted in the upper casing, a storage box mounted in the lower casing, and a tray arranged in the storage box. The sealable powder box further comprises a gasket, the gasket is arranged in the tray by means of injection molding, or is sandwiched between the tray and the storage box and engaged with the tray. The inner casing is mounted in the upper casing, and the top part of the inner casing penetrates the top part of the upper casing. The upper casing and the inner casing are axially slidable and radially rotatable relative to each other, the storage box is engaged in the lower casing and threadingly connected with the upper casing, and the inner casing and the tray are rotatably connected with the lower casing by a pin.

A manway cover assembly can be used to control access to the interior of a railroad tank car or other type of tank or structure. The manway cover assembly can have a tightening system, such as a screw tightening system and an attachment system. The attachment system can have a ledge configured to engage a flange that surrounds an opening. A cover can control access to the opening. The tightening system can secure the ledge to the flange and lock the cover over the opening. A manway cover assembly can also be used for selectively sealing an access passageway of a tank. The manway cover assembly can have an internal seal that remains sealed independent of movement between the cover and the opening within a set range of movement.

The present application is directed to closure assemblies, and particularly closure assemblies for closing an opening in a vessel. In particular embodiments, the closure assemblies described herein can have a first ring having a top surface, an inner surface and an outer surface, wherein the outer surface comprises threading, wherein the first ring comprises a first flange having a top surface extending radially inward from the inner surface of the first ring a distance of F.sub.L, and wherein the top surface of the first flange is spaced apart from the top surface of the first ring by a distance F.sub.H, and wherein a ratio of F.sub.H:F.sub.L is greater than 1.