Abstract: An ultra low temperature refrigeration system and technique, includes a cabinet with a storage chamber maintained at a certain temperature range, a door providing a seal with the cabinet when engaged with the cabinet, and a dehumidifying unit connected to the cabinet for dehumidifying the storage chamber within the cabinet.

Abstract: A storage cabinet (16) is provided for an ultra-low temperature freezer (10). The cabinet (16) includes a base platform (62a), a plurality of side structural insulated panels (45, 50, 55) each defining a side wall of the storage cabinet (16), and a plurality of generally vertically oriented posts (40) extending from the base platform (62a). Each of the plurality of vertically oriented posts (40) has a slot (40a) for receiving an edge portion (45a, 50a, 55a) of one of the insulated panels (45, 50, 55) therealong. The slot (40a) may have a generally U-shaped profile that surrounds the edge portion (45a, 50a, 55a) of one of the insulated panels (45, 50, 55). At least one of the generally vertically oriented posts (40) has a channel (40c) that extends along a longitudinal dimension thereof, the channel (40c) being configured to receive one of insulation, tubing, or wiring of the freezer therethrough.

Abstract: A storage cabinet (16) is provided for an ultra-low temperature freezer (10). The cabinet (16) includes a base platform (62a), a plurality of side structural insulated panels (45, 50, 55) each defining a side wall of the storage cabinet (16), and a plurality of generally vertically oriented posts (40) extending from the base platform (62a). Each of the plurality of vertically oriented posts (40) has a slot (40a) for receiving an edge portion (45a, 50a, 55a) of one of the insulated panels (45, 50, 55) therealong. The slot (40a) may have a generally U-shaped profile that surrounds the edge portion (45a, 50a, 55a) of one of the insulated panels (45, 50, 55). At least one of the generally vertically oriented posts (40) has a channel (40c) that extends along a longitudinal dimension thereof, the channel (40c) being configured to receive one of insulation, tubing, or wiring of the freezer therethrough.

Abstract: An ultra low temperature refrigeration system and technique, includes a cabinet with a storage chamber maintained at a certain temperature range, a door providing a seal with the cabinet when engaged with the cabinet, and a dehumidifying unit connected to the cabinet for dehumidifying the storage chamber within the cabinet.

Abstract: A cover for closing a hatch opening in a container such as an enclosed railroad hopper car is provided. The cover is sized to fit over a coaming extending from the hatch opening. An outer rim is formed on the cover and cooperates with the coaming to form an air passage which surrounds an exterior surface of the coaming when the cover is disposed thereon. The cover includes a filter assembly and a gasket which cooperate to provide a continuous vent or air communication path between the interior and the exterior of the container through the air passage. All communication of air between the exterior of the container and the interior of the container is directed through the filter assembly.

Abstract: A gate valve assembly and a frame assembly for mounting the gate valve assembly on the discharge opening from a railway hopper car. The gate valve assembly includes an operating assembly for movement of a valve member within the gate valve assembly between a first, closed position and a second, open position. A locking mechanism is mounted on the frame assembly to maintain the gate valve assembly in its first closed position when the associated railway car is subjected to large impact forces. The operating assembly includes a lock striker which may be moved longitudinally relative to the valve member to deactivate the locking mechanism while the valve member remains in its closed position. The frame assembly also provides an enhanced seal or barrier to prevent materials from escaping when the gate valve assembly is in its closed position.