Abstract: The present invention relates to an axial hydrostatic thrust-bearing for an axial and radial bearing unit. This consists of two hydrostatic axial bearings (12, 13) acting on either side of a pressure plate or flange (14) which is connected to the shaft (6). The hydrostatic bearings, each of which is equipped with at least one fluid pocket supplied with fluid from an external flow source, exhibit an external form such that, in combination with the bearing housing, they form the hydraulic pressure chambers C and D. These pressure chambers in turn are in direct contact with the pressure chambers A and B of the of the linear servo motor, which in turn are formed by the frame (1), the bearing housing (2) and a back plate (3). The pressure inside the chambers A and B is regulated via a servo valve (8) in proportion to the externally applied axial loading.

Abstract: An improved screening apparatus for fiber suspensions is provided comprisingat least one stationary, generally cylindrical screen drum into which the fiber suspension is fed having a central axis and a plurality of apertures through which rejectable material from the suspension cannot pass and is retained on a reject side of the drum and through which accepted fibers from the suspension can pass to an opposite side of the drum;a generally cylindrical rotor, co-axial with the axis of the cylindrical screen drum;the rotor supporting a series of blades arranged circumferentially about the rotor and substantially aligned with the longitudinal axis of the rotor, with the lateral extent of each blade being adjacent the surface of the cylindrical screen drum; andeach blade in the series of blades having opposing ends and being inclined in the opposite direction to any adjacent blade relative to a line in the circumferential path of the blades which is parallel to the longitudinal axis of the rotor and the cylindrica

Abstract: A paper pulp refiner for refining high consistency stock characterized by two virtually identical refining zones connected in series which have an interstage device to remove excess steam and whose axial loads can be varied independently thus producing two stage pump from a single refiner.