A protective cover (10) for removably affixing to a trommel frame section (1) of a trommel device may be configured to protect portions of the trommel frame section (1) from abrasion and wear from screened material (30) being processed by the trommel device. The protective cover (10) may comprise a body (19); fixation members (11) extending from the body (19); one or more locking features (15) provided to the fixation members (11) for securing the body (19) to the trommel frame section (1); and, an opening (17) provided between the fixation members (11). A trommel device or trommel frame section (1)

It is described a mining screen (100) comprising at least one propulsion element (140) associated with a screening structure (165), wherein the mining screen (100) is able to carry out (develop) at least one vibration regime, thereby promoting the screening of a material moving through the screen (100), wherein the screen (100) is configured in such a way that at least one between the propulsion element (140) and the screening structure (165) are manufactured from a first material, the first material configured as a compound (composite) material. Furthermore, it is described as a screen panel (156) applied on a mining screen (100), a control method for mining screen as well as a mining system.

A system for segregating a mixture of oxidizable catalyst material and inert support media. The system comprises an enclosure configured to contain inert gas. The enclosure includes a plurality of stacked screens disposed therein. The stacked screens include openings that decrease in size from a top of the stack to a bottom of the stack. The enclosure also includes an inlet to deliver the mixture to an uppermost stacked screen and outlets to direct the separated support media and catalyst material to a location outside the enclosure.

The sieving device includes a support device, which holds a sieve, which has at least one sieve lining that is held by a sieve frame, which is connected to a drive device. The drive device, which is controllable by a control device by means of a control program, includes at least three actuators, which are connected each on one side via a first swivel joint to the support device and which are connected each on another side via second swivel joint to the sieve frame, so that the sieve is held solely by the actuators and is displaceable within an operating volume and optionally rotatable.

Vibratory screening machines that include stacked screening deck assemblies are provided. In some embodiments, at least one of the vibratory screening machines may include an outer frame, an inner frame connected to the outer frame, and a vibratory motor assembly secured to the inner frame for vibrating the inner frame. A plurality of screen deck assemblies may be attached to the inner frame in a stacked arrangement, each configured to receive replaceable screen assemblies. The screen assemblies may be secured to respective ones of the plurality of the screen deck assemblies by tensioning the screen assemblies in a direction that a material to be screened flows across the screen assemblies. An undersized material discharge assembly may be configured to receive materials that pass through the screen assemblies, and an oversized material discharge assembly having a deflector may be configured to receive materials that pass over the screen assemblies.

The horticulture classifier apparatus is intended to provide users with a sifting and sorting device that can separate multiple sizes of plant material. To accomplish this, the device includes specific surface contours and multi-purpose handling structures to be described in relation to a sieve grid. Further, the apparatus includes critical functional elements relating to the separation of whole marijuana buds, specifically, that are presented as novelties. To that end, a sifting screen is included, which may be detachably mounted onto the main classifying grid. In addition, the apparatus includes means for mounting the device on multiple kinds of totes and bins, to sequentially separate the various tiers of consumable cannabis. This arrangement may also include attachment to an external collection bin or bag, depending on the individual application of the apparatus by a user.

The present invention is directed to a drilling fluid reclaimer. The reclaimer has at least one adjustable screen assembly for providing a leveling filter for reclaimed drill fluid. Used drill fluid is placed at the screen assembly at the front the of the screen assembly. The at least one screen is vibrated to separate large particulate matter from liquid drilling fluid. A second screen is provided for additional filtering. Large particulate matter is expelled by a chute at the back of the screen assembly. Drilling fluid passing through the screen is “reclaimed” for use with a drilling system.

A disclosed screening apparatus includes a subgrid, and a screen element attached to the subgrid via laser welding at a plurality of attachment positions such that, under vibrational excitation, the screen element has a pre-determined profile of vibrational motion relative to the subgrid. The screen element may be attached at a maximal number of attachment locations to the subgrid to minimize relative motion of the screen element and the subgrid under vibrational excitation, or the screen element may be attached a sub-set of the maximal number of attachment locations to allow vibrational motion of the screen element relative to the subgrid. A disclosed method may include attaching a plurality of screen elements to a respective plurality of subgrids, attaching the plurality of subgrids to one another to form a screening pre-assembly, and cutting edges of the screening pre-assembly to form the screen assembly having a perimeter with a pre-determined shape.

A shaker screen assembly comprising a support frame and a screen subassembly attached to the support frame is provided. The screen subassembly includes a planar panel that includes a plurality of undulation sealing tabs, and a mesh section attached to the planar panel. The mesh section includes a series of undulations, each undulation including an elongated base portion and an elongated raised portion. The mesh section is attached to the planar panel such that the elongated raised portions form a series of elongated open areas having open ends and an undulation sealing tab of the planar panel is positioned in each of the open ends. The undulation sealing tabs help prevent fluid from leaking or flowing through the open ends when the shaker screen assembly is in use.

A disclosed screening apparatus includes a subgrid, and a screen element attached to the subgrid via laser welding at a plurality of attachment positions such that, under vibrational excitation, the screen element has a pre-determined profile of vibrational motion relative to the subgrid. The screen element may be attached at a maximal number of attachment locations to the subgrid to minimize relative motion of the screen element and the subgrid under vibrational excitation, or the screen element may be attached a sub-set of the maximal number of attachment locations to allow vibrational motion of the screen element relative to the subgrid. A disclosed method may include attaching a plurality of screen elements to a respective plurality of subgrids, attaching the plurality of subgrids to one another to form a screening pre-assembly, and cutting edges of the screening pre-assembly to form the screen assembly having a perimeter with a pre-determined shape.