Abstract: The invention relates to an exhaust gas filter device for filtering contaminants out of exhaust gases, comprising: a filtering apparatus for filtering the exhaust gases, wherein the exhaust gases enter the filtering apparatus at a filter inlet surface, flow through the filtering apparatus and exit the filtering apparatus at a filter outlet surface; and a distribution channel for distributing the exhaust gases to be filtered along the filter inlet surface, and a collection channel for collecting the filtered exhaust gases exiting at the filter outlet surface; wherein the cross section of the collection channel increases in the direction of flow of the exhaust gases and/or the cross section of the distribution channel decreases in the direction of flow of the exhaust gases.

Abstract: The invention relates to an exhaust gas filter device for filtering contaminants out of exhaust gases, comprising: a filtering apparatus for filtering the exhaust gases, wherein the exhaust gases enter the filtering apparatus at a filter inlet surface, flow through the filtering apparatus and exit the filtering apparatus at a filter outlet surface; and a distribution channel for distributing the exhaust gases to be filtered along the filter inlet surface, and a collection channel for collecting the filtered exhaust gases exiting at the filter outlet surface; wherein the cross section of the collection channel increases in the direction of flow of the exhaust gases and/or the cross section of the distribution channel decreases in the direction of flow of the exhaust gases.

Abstract: A refrigerant or coolant compressor of the radial type with an impeller hng a plurality of vane elements can be used for compressing water vapor as a refrigerant or coolant under vacuum conditions. The impeller of the compressor is constructed to produce a high volume flow rate at the required compression ratio, in view of the low density of water vapor as the preferred flow medium. The impeller has sufficient strength to operate at the required high circumferential velocities. The impeller includes vane elements, disk elements, vane support elements and a hub. The vane elements are individually connected to the hub by the support elements. The support elements may be either ring-shaped elements connecting a rear surface of the disk elements to the hub, or may be pin-shaped insert members connecting the root of each vane element to the hub. The components of the impeller are made of a polymer composite material reinforced preferably with carbon fibers.

Abstract: A winnowing blower for discharging a stream of air over the sieve of a combine harvester-thresher has an axially elongated housing formed at each of its axial ends with an inlet opening provided with an axial-flow fan. A shaft passing axially through the housing carries these two fans and two deflector disks spaced inwardly from the fans and each of a diameter substantially less than the respective fan. The housing is provided with a radially extending plenum chamber so that air drawn axially into the ends of the housing is partially deflected by these plates and ejected outwardly through the plenum chamber over the sieve of the combine.