An apparatus (1) for continuous gravimetric metering of pourable material comprises a housing (2) comprising a first and a second spaced wall (5,6), a charging port (7) through the first wall (5), and a discharging port (8) through the first wall (5) displaced from the charging port (7) and a primary air port (10) with a primary outlet opening (9) through the second wall (6) opposite to the discharging port (8). In the second wall (6) a secondary air port (12) is provided with a secondary outlet opening (11) having a substantially smaller outlet area than the primary outlet opening (9) and being displaced from the primary outlet opening in opposite direction to the rotational direction of the rotor (3) and being arranged opposite to the discharging port (8), and where the primary and secondary air ports (10,12) are connected to a compressed air supply.

A process for pressurizing bulk material in a hopper; wherein the hopper is configured as a lock hopper (29) containing a bulk material, a source of pressurized gas, lines (22, 26, 28) to convey the pressurized gas from the source to one or more inlets (30) of the lock hopper, a valve arranged in the lines, wherein the opening position of said valve (34, 35) is controlled to provide pressurizing gas to the lock hopper at a preset constant gas volume flow rate.

There is herein described an adjustable multi-hole orifice plate in a pneumatic conveying apparatus. More particularly, there is described an adjustable multi-hole orifice plate which can be used in a pneumatic conveying apparatus to assist in the discharge of material.

A system for moving and placing granulate is provided together with a rotary airlock device. The system has a housing mountable to a trailer with cabinet located on a side of the housing with a compressor, at least one back compartment located on a back side of the housing. The compartment has a rotary airlock device in communication with the compressor. The compressor feeds air to the rotary airlock device under pressure, and an actuatable feeder located on the back side of the housing receives granulate and feeds the granulate to the rotary airlock device.

A system for moving and placing granulate is provided. A housing is mountable to a trailer and has at least one cabinet located on a side of the housing with a compressor, at least one back compartment located on a back side of the housing, wherein the at least one back compartment has at least one rotary airlock device in communication with the compressor, wherein the compressor feeds air to the rotary airlock device under pressure, an actuatable feeder located on the back side of the housing, wherein the feeder when in an open position receives granulate and feeds the granulate to the at least one rotary airlock device, and a hose mount located on the housing and in communication with a bottom portion of the at least one rotary airlock, wherein when the compressor is actuated, the granulate is fed from the feeder, through the at least one rotary airlock and out through the house mount into a hose to place the granulate in a predetermined place.

The invention relates to a screening element for screening and transporting grit material, for applying to a sanding device of a sanding apparatus for a vehicle. The screening element includes a plate element provided with a shaft-coupling mechanism, at least one through-opening, and at least one lug. The shaft-coupling mechanism is designed to couple the screening element to a shaft device of a rotary feeder of the sanding device. The through-opening is arranged in the plate element and is designed to guide grit material through the plate element. The lug extends transversely in relation to a main surface of the plate element, away from the plate element.

In some examples, an apparatus includes a plurality of conduits to transport a material of a three-dimensional (3D) printing system between locations in the 3D printing system. A sensor assembly detects a clogged condition of a first conduit of the plurality of conduits. A valve assembly connected to the plurality of conduits selectively controls flow of the material through the plurality of conduits, the valve assembly controllable to actuate from a first setting to a second setting responsive to the detected clogged condition.

An apparatus (1) for continuous gravimetric metering of pourable material comprises a housing (2) comprising a first and a second spaced wall (5,6), a charging port (7) through the first wall (5), and a discharging port (8) through the first wall (5) displaced from the charging port (7) and a primary air port (10) with a primary outlet opening (9) through the second wall (6) opposite to the discharging port (8). In the second wall (6) a secondary air port (12) is provided with a secondary outlet opening (11) having a substantially smaller outlet area than the primary outlet opening (9) and being displaced from the primary outlet opening in opposite direction to the rotational direction of the rotor (3) and being arranged opposite to the discharging port (8), and where the primary and secondary air ports (10,12) are connected to a compressed air supply.

A system for moving and placing granulate is provided. A housing is mountable to a trailer and has at least one cabinet located on a side of the housing with a compressor, at least one back compartment located on a back side of the housing, wherein the at least one back compartment has at least one rotary airlock device in communication with the compressor, wherein the compressor feeds air to the rotary airlock device under pressure, an actuatable feeder located on the back side of the housing, wherein the feeder when in an open position receives granulate and feeds the granulate to the at least one rotary airlock device, and a hose mount located on the housing and in communication with a bottom portion of the at least one rotary airlock, wherein when the compressor is actuated, the granulate is fed from the feeder, through the at least one rotary airlock and out through the house mount into a hose to place the granulate in a predetermined place.

The invention relates to a screening element for screening and transporting grit material, for applying to a sanding device of a sanding apparatus for a vehicle. The screening element includes a plate element provided with a shaft-coupling mechanism, at least one through-opening, and at least one lug. The shaft-coupling mechanism is designed to couple the screening element to a shaft device of a rotary feeder of the sanding device. The through-opening is arranged in the plate element and is designed to guide grit material through the plate element. The lug extends transversely in relation to a main surface of the plate element, away from the plate element.