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.

A seal releasing lid assembly includes a lid configured for coupling across a container opening of a container. The lid includes a lid surface and a lid wall extending from the lid surface. The lid wall includes a lid edge and a slidable coupling surface between the lid edge and the lid surface. The assembly includes a retaining and releasing ring configured for coupling with the container and with the lid. The retaining and releasing ring includes a ring flange and a release ridge. A ring wall extends from the ring flange to the release ridge. The retaining and releasing ring includes decoupling and release ready configurations. In the decoupling configuration the release ridge is slidably coupled along the lid wall. In the release ready configuration the release ridge is seated beneath the lid edge and slidably disengaged from the lid wall.

A seal releasing lid assembly includes a lid configured for coupling across a container opening of a container. The lid includes a lid surface and a lid wall extending from the lid surface. The lid wall includes a lid edge and a slidable coupling surface between the lid edge and the lid surface. The assembly includes a retaining and releasing ring configured for coupling with the container and with the lid. The retaining and releasing ring includes a ring flange and a release ridge. A ring wall extends from the ring flange to the release ridge. The retaining and releasing ring includes decoupling and release ready configurations. In the decoupling configuration the release ridge is slidably coupled along the lid wall. In the release ready configuration the release ridge is seated beneath the lid edge and slidably disengaged from the lid wall.

The container with a hermetic closure has a receptacle having a receptacle opening surrounded by an annular mouth surface, a lid having a front side and a back side intended for being oriented towards the outside and the inside of the receptacle, respectively, a sealing ring arranged between the annular mouth surface of the receptacle and an annular perimetral flange of the lid, and a closure mechanism formed by a shaped metal wire defining a first region coupleable to the lid, a second region being under elastic stress in a closed position and a third region coupleable to the receptacle. The front side of the lid has at least two opposite supporting points in an area coinciding with or adjacent to the annular flange, and the first region of the closure mechanism is configured for being supported, in a closed position, on said at least two opposite supporting points.

A locking top for blocking a stopper in the neck of a vessel comprises an outer body and a cage that is configured to fit into and lock axially in the outer body. The cage comprises an upper ring, a plurality n of branches connected to the upper ring, n/2 median bridges and n/2 lower bridges arranged in alternation on the periphery of the cage, each connecting together two adjacent branches. When the top is in an intermediate holding position in which the stopper is partially pushed into the neck, the lower bridges surround, at least in part, a collar of the neck; the median bridges located, in an axial direction, between the upper ring and the lower bridges are designed to form an open space between them and the collar.

A locking top for blocking a stopper in the neck of a vessel comprises an outer body and a cage that is configured to fit into and lock axially in the outer body. The cage comprises an upper ring, a plurality n of branches connected to the upper ring, n/2 median bridges and n/2 lower bridges arranged in alternation on the periphery of the cage, each connecting together two adjacent branches. When the top is in an intermediate holding position in which the stopper is partially pushed into the neck, the lower bridges surround, at least in part, a collar of the neck; the median bridges located, in an axial direction, between the upper ring and the lower bridges are designed to form an open space between them and the collar.

A lid assembly includes a lid element having an annularly shaped peripheral portion configured to be axially aligned with and disposed between a rim of a canning container and a radially extending portion of a retainer element when the lid assembly is engaging the canning container and the retainer element is removably coupled to the canning container. An annularly shaped sealing element is disposed on the peripheral portion of the lid element and is configured to directly engage the rim of the canning container when the lid assembly is contacting the canning container. A plurality of projections is formed in the peripheral portion of the lid element with each of the projections forming a distally disposed surface of the peripheral portion with respect to an exterior axial direction of the lid element extending away from an interior of the canning container when the lid assembly is engaging the rim.

A lid assembly includes a lid element having an annularly shaped peripheral portion configured to be axially aligned with and disposed between a rim of a canning container and a radially extending portion of a retainer element when the lid assembly is engaging the canning container and the retainer element is removably coupled to the canning container. An annularly shaped sealing element is disposed on the peripheral portion of the lid element and is configured to directly engage the rim of the canning container when the lid assembly is contacting the canning container. A plurality of projections is formed in the peripheral portion of the lid element with each of the projections forming a distally disposed surface of the peripheral portion with respect to an exterior axial direction of the lid element extending away from an interior of the canning container when the lid assembly is engaging the rim.

Implementations of a bucket comprising improved drainage systems and mechanisms may provide for ease of emptying a bucket of substances without the user needing to bend or reach down to manipulate the bucket or drainage mechanism, and may optionally provide for enhanced filtering capabilities.

Implementations of a bucket comprising improved drainage systems and mechanisms may provide for ease of emptying a bucket of substances without the user needing to bend or reach down to manipulate the bucket or drainage mechanism, and may optionally provide for enhanced filtering capabilities.