Abstract: An unpacking device for use in an apparatus for producing a three-dimensional work piece by irradiating layers of a raw material powder with electromagnetic or particle radiation, the unpacking device comprises a holding device which is configured to hold a building chamber arrangement. The building chamber arrangement comprises a building chamber accommodating a carrier, wherein the carrier is configured to receive a three-dimensional work piece produced from a raw material powder by an additive layering process. An engagement unit of the unpacking device is configured to engage with the carrier of the building chamber arrangement. A moving mechanism is configured to cause a relative movement between the building chamber and the engagement unit with the carrier engaged therewith so as to allow a separation of the carrier with a three-dimensional work piece received thereon from the building chamber.

Abstract: There is provided a method of filtration for a rail vehicle or other off-highway powered system. The method includes determining a filter load of a primary filtration system to an air intake of an engine. The method also includes determining that the filter load exceeds a specified threshold. Additionally, the method includes de-activating the primary filtration system. The method further includes activating a secondary filtration system to the engine.

Abstract: An exhaust treatment system comprises a particulate matter filter, a first heater element, and a second heater element. The particulate matter (PM) filter filters PM from exhaust gas and includes N zones. Each of the N zones includes an inlet area that receives a portion of the exhaust gas. N is an integer greater than one. The first heater element includes a contact area that heats exhaust gas input to an inlet area of a first one of the N zones. The second heater element includes a second contact area that heats exhaust gas input to an inlet area of a second one of the N zones. A ratio of the contact area of the first heater element to the inlet area of the first zone is greater than a ratio of the contact area of the second heater element to the inlet area of the second zone.

Abstract: A cone (36) and a ring (38) are accessories separately used during respective phases of cleaning a diesel particulate filter (10, 10?) in a cleaning machine that uses compressed air pulses to clean the substrate (12) where particulate matter in engine exhaust has been trapped. In one phase the ring covers the outer perimeter margin of one end face of the substrate, and in the other phase the cone covers a central inner zone of the end face.

Abstract: A bag house air filtration system with minimal recirculation uses new inlet airflow patterns and cleaning processes. Inlet air enters the bag house. An input plenum changes the velocity profile. Dirty inlet air is split into two plenums, and then passed through guide vanes. A clean air plenum contains a series of individual compartments with a pre-set number of filter bags that are effectively cleaned during a single cleaning cycle. Each individual compartment has a door or louver mounted above the bag openings that is opened and closed during the cleaning cycle. An automatic control system continuously senses bag house pressure drop and activates the cycle when needed. The doors open and close in a pre-set pattern to drop the dust cakes from the bags and restore air flow to normal pressures. Closing a door mounted above the bags creates a reversal of pressure that removes the dust cake.

Abstract: A valve and trigger cyclically connect a vacuum and a blower to a filter. The valve box has three openings, the first connectable to the vacuum, the second connectable to the blower and the third connectable to the filter. A gate inside the box, biased by the blower and the vacuum toward closing the first opening, is held against the bias by a trigger outside the box to close the second opening. The external trigger intervally operates to release the interior gate to close the first opening and open the second opening. The blower operates only if the trigger is operating. The gate is released once for approximately 1/12 of a cycle interval during each trigger operating interval. A plurality of valves can be combined in a system with one trigger for cyclically sequentially connecting a plurality of filters to the vacuum and the blower.

Abstract: In a particle filter with carbon (soot) deposit combustion for Diesel engines comprising a filter with filter areas of sinter metal through which exhaust gases from the Diesel engine are conducted to remove the soot therefrom, the soot collected at the raw gas side of the filter surfaces is burned off by radiation heaters which are arranged so as to radiate between wedge-like filter pockets of the particle filter such that selected areas of the filter are heated to initiate combustion of the soot on the filter surfaces.

Abstract: An apparatus for treating compressed air from a rail yard compressed air supply pipeline leading from a central air compressor to outlets at remote locations in a rail yard prior to charging air brake lines of trains with compressed air from the pipeline to prevent contaminants such as moisture, entrained atomized oil and/or particulates such as rust from getting into the air brake line of the train. The apparatus includes an air line, an air inlet connector at one end of the air line, an outlet connector at the other end of the air line, and at least one separator device interposed in the air line between the inlet connector and the outlet connector for separating contaminants from a stream of compressed air passing through the apparatus.

Abstract: An apparatus and method for removing particulate from a particulate-laden gas stream are disclosed. The apparatus and method include a reverse-flow process for cleaning filter bags with a cleaning gas stream. The process includes: flowing a particulate-laden gas stream to one side of the filter bags; stopping the particulate-laden gas stream to at least one filter bag; popping the filter bag with a reverse-flow of a cleaning gas stream to remove dust from the bag; and finally re-introducing the particulate-laden gas stream to the recently cleaned filter bag at a low velocity/flow rate to prevent small particles from blowing through the recently cleaned filter bag. The apparatus and method allow the particulate-laden gas stream and cleaning gas stream to be controlled independently.

Abstract: A valve and trigger cyclically connect a vacuum and a blower to a filter. The valve box has three openings, the first connectable to the vacuum, the second connectable to the blower and the third connectable to the filter. A gate inside the box, biased by the blower and the vacuum toward closing the first opening, is held against the bias by a trigger outside the box to close the second opening. The external trigger intervally operates to release the interior gate to close the first opening and open the second opening. The blower operates only if the trigger is operating. The gate is released once for approximately {fraction (1/12)} of a cycle interval during each trigger operating interval. A plurality of valves can be combined in a system with one trigger for cyclically sequentially connecting a plurality of filters to the vacuum and the blower.

Abstract: An apparatus for conveying a process gas stream from an upstream source to a downstream treatment unit, including a manifold receiving gas from the upstream source, including first and second valved inlet lines which are alternatingly employed to flow gas to a downstream process. The manifold is arranged so that one of such lines is actively flowing gas from the upstream source to the downstream process, while the other is blocked by closure of the valve therein and is undergoing regeneration. A pressurized water source is coupled with the manifold, by valved water flow lines to each of the first and second inlet lines, with the water flow line valves being selectively openable or closeable to establish or discontinue flow of pressurized water therethrough, respectively. Cycle timer control means are employed to control the operation of the manifold and valves, for water cleaning of the off-stream inlet line.