Abstract: An exhaust gas discharging apparatus for connection to an exhaust gas fan including an exhaust gas nozzle comprising a duct device forming at least one exhaust passage that extends between first and second open ends. The duct device has at least one exterior duct wall forming at least two longitudinally extending bent wall portions that are distributed evenly about the periphery of the duct device with each bent wall portion sloping towards the longitudinal axis in the region of the second end. An annular cap or wind band is connected to the duct device and is disposed about and spaced apart from the second end of the duct device. The cap has a cap inlet located below the second end and outside the duct device and a cap outlet located outwardly from the second end in the longitudinal direction. Vertically extending wind deflecting panels are mounted on the duct device and extend horizontally outwardly and these panels extend vertically below the cap.

Abstract: An exhaust gas discharging apparatus for connection to an exhaust gas fan including an exhaust gas nozzle comprising a duct device forming at least one exhaust passage that extends between first and second open ends. The duct device has at least one exterior duct wall forming at least two longitudinally extending bent wall portions that are distributed evenly about the periphery of the duct device with each bent wall portion sloping towards the longitudinal axis in the region of the second end. An annular cap or wind band is connected to the duct device and is disposed about and spaced apart from the second end of the duct device. The cap has a cap inlet located below the second end and outside the duct device and a cap outlet located outwardly from the second end in the longitudinal direction. Vertically extending wind deflecting panels are mounted on the duct device and extend horizontally outwardly and these panels extend vertically below the cap.

Abstract: A contacting grate or panel for mass transfer or heat exchange comprising a substantially rectangular supporting framework having two connecting frame members extending along opposite side edges and a number of elongate supporting frame members extending between the connecting frame members. A series of small, parallel plates are mounted along each of the supporting frame members and each plate is relatively short. The grate has two relatively large and opposite sides and the planes in which the plates lie are perpendicular to these two opposite sides. Preferably, each plate lies in a plane which extends at an acute angle of less than 90 degrees to a longitudinal central axis of its respectively supporting frame member. A number of these grates can be connected together at their corners to form a module.

Abstract: A combined propulsion and lift unit for an air-cushion vehicle is provided comprising an elongate shaft mounted for rotation about its central longitudinal axis, bearings for rotatably supporting the shaft, an axial wheel with two or more blades mounted on the shaft for rotation therewith, a first housing extending peripherally about the shaft, the housing provided with an air inlet and an air outlet, a drive device connected to the shaft for rotating same at a selected speed, a centrifugal fan wheel mounted on the shaft for rotation therewith, the fan wheel provided with an air inlet, the fan wheel located inside the first housing, and a second housing extending about the perimeter of the axial wheel and the first housing, the second housing having a larger diameter than the first housing thereby defining an air passageway therebetween, the second housing provided with an air inlet and an air outlet.

Abstract: A centrifugal fan including a fan wheel and a driveshaft for rotating the wheel in a housing. The fan wheel has an axial center and outer edge portions around the radially outermost extremities. The housing is formed of right and left unitary housing halves of the same size and shape. The housing halves each form a sidewall of the housing and a portion of a circumferential wall of the housing. The housing halves are joined directly to one another to form the housing. The housing has a suction inlet in one of the right and left housing halves at the axial center of the wheel and a fan outlet formed by the housing. The outlet has a center line that is located generally on a radius extending from the axial center of the fan wheel. A chamber for the fan wheel is formed in the housing. A baffle is rigidly connected to the housing and is located in the housing adjacent the side of the fan outlet towards which the fan wheel rotates.

Abstract: The invention provides a separator blade for a mist eliminator of the kind comprising a plurality of parallel blades providing corresponding flow passages that change direction. A first direction change occurs immediately upon entry to the flow passage so that droplets are deposited on the blade front face. This part of the front face terminates in a primary collecting channel formed by a hook-like member protruding into the passage. The outer face of this hook-like member is convex curved and forms a venturi throat with the facing rear face of the adjacent blade. The blade is shaped to change the passage direction immediately after the throat and to provide an impingement surface at right angles to the gas flow that leads immediately into a secondary collecting channel formed by a respective hook-like member protruding into the passage from the rear face.