A retractable container cover system includes a container, a track, a cover, and an actuation mechanism. The container includes a plurality of sides, a bottom, and a cavity defined by the plurality of sides and the bottom. The track is coupled to one of the plurality of sides of the container. The cover includes a first end. The cover is further configured to be slidably received by the track and move between a deployed position and a retracted position. The actuation mechanism is coupled to a first side of the plurality of sides of the container. The actuation mechanism is configured to cause the cover to move between the deployed position and the retracted position. The cover encloses the cavity of the container when in the deployed position.

A discharge assembly for use in or with dispensing apparatus. The discharge assembly includes an entry chamber for receiving one or more items to be dispensed in use. At least one discharge outlet is provided in the entry chamber. The directing member is movably mounted in the entry chamber for directing the one or more items through the at least one discharge outlet in use. At least one opening is defined in or associated with the directing member for allowing the one or more items to move through the at least one opening and towards the discharge outlet in use. A closure member is associated with the at least one opening of the directing member and said closure member is arranged to move in use between an open position, wherein the one or more items can move through the at least one opening of the directing member, and a closed position, wherein the one or more items are prevented from moving through the at least one opening of the directing member. A resilient biasing member is provided on or associated with the closure member to bias the closure member to the open position in use.

A closure device for a bulk material system is provided, specifically for regulating a flow of heat transfer particles. The closure device includes a bulk material guide which has a first opening for connection to the bulk material system and a second opening for the discharge of a bulk material guided by the bulk material system, and a closure blade which is rotatably mounted about an axis of rotation. The closure blade, in a first rotational position, closes the second opening and, in a second rotational position, at least partially uncovers the second opening. The closure blade is mounted in such a manner to reduce jamming of the closure device in operation.

A discharge assembly for use in or with dispensing apparatus. The discharge assembly includes an entry chamber for receiving one or more items to be dispensed in use. At least one discharge outlet is provided in the entry chamber. The directing member is movably mounted in the entry chamber for directing the one or more items through the at least one discharge outlet in use. At least one opening is defined in or associated with the directing member for allowing the one or more items to move through the at least one opening and towards the discharge outlet in use. A closure member is associated with the at least one opening of the directing member and said closure member is arranged to move in use between an open position, wherein the one or more items can move through the at least one opening of the directing member, and a closed position, wherein the one or more items are prevented from moving through the at least one opening of the directing member. A resilient biasing member is provided on or associated with the closure member to bias the closure member to the open position in use.

Method of handling proppant at a well site using a plurality of modular proppant containers in which first and second modular proppant container in a filled state are removed from delivery transport vehicles and transferred to first and second cradle positions on a support structure using one or more heavy-duty handlers. Proppant is discharged by gravity feed from the outlet of the first and second modular proppant containers and directed to a hopper until the modular proppant containers are in an empty state.

An unloader for a shipping container includes a supporter having a frame structure and a pallet base supported by the frame structure and configured to receive the pallet and support the shipping container in an elevated position. A gate moving mechanism is supported by the pallet base and configured to engage the moveable gate assembly when the full shipping container is positioned onto the pallet base. A material director has a first end located beneath the pallet base subjacent of the gate moving mechanism. The material director extends downwardly from the pallet base and terminates at a second end opposite the first end. Bulk material is dispensed from the shipping container into the first end and is discharged from the second end of the material director. Shipping containers may be positioned onto and removed from the pallet base without disassembly of the unloader.

A container is constructed to carry granular material from a quarry or source to the frac site. An open frame the size of a standard cargo container is constructed. An enclosed hopper is formed using flat sheet metal with bolted together perpendicular edges. The hopper is set within, and attached to, the frame. Top hatches provide for loading the hopper, and a lower sliding gate in a bottom opening provides for unloading the hopper. The bottom of the hopper is at an angle slightly above the angle of repose of the granular material carried therein.

Implementations described and claimed herein involve systems and methods for facilitating coin hopper maintenance. In one implementation, a top plate is received in a bucket assembly of the coin hopper at a proximal end. The top plate seals one or more coins in an interior of the bucket assembly. The coin hopper is positioned in an inverted orientation by meeting a target surface with the top plate. The inverted orientation positions the bucket assembly at a distal end near the target surface and a base assembly at the proximal end. A hopper dispenser is disengaged from the base assembly of the coin hopper.

Implementations described and claimed herein involve systems and methods for facilitating coin hopper maintenance. In one implementation, a top plate is received in a bucket assembly of the coin hopper at a proximal end. The top plate seals one or more coins in an interior of the bucket assembly. The coin hopper is positioned in an inverted orientation by meeting a target surface with the top plate. The inverted orientation positions the bucket assembly at a distal end near the target surface and a base assembly at the proximal end. A hopper dispenser is disengaged from the base assembly of the coin hopper.

A fuel tank assembly includes a shell defining an opening therein, an access panel connectable to the shell and movable between a closed position where the opening is closed and an open position where the opening is open, and a fuel tank disposed in the shell and slidably engaged with the shell. The fuel tank and the opening are dimensioned such that the fuel tank is slidable out of the shell via the opening when the access panel is in the open position. A generator assembly and a method of servicing a fuel tank of a generator are also described.