Abstract: This invention relates to a self-priming screw pump lubrication system. The system 10 includes a central feed tube which communicates at one end with lubricant in a reservoir or sump and at the other end to the central region of an assembly that includes a horizontally disposed rotating shaft. The shaft having thereon threaded portions of opposite pitch mounted within a pair of mating sleeves which sleeves are biased away from each other at the central region of the assembly. The other ends of the sleeves are in abutting relationship with the outer races of a pair of angular contact bearings to be lubricated. Each of the inner races of the bearings are mounted on the rotary shaft. Lubricant slingers are mounted on the rotating shaft at a point remote from the bearings and cooperate with the lubricant that has been drawn upward through the central feed tube and delivered to and past the bearings, whereupon the slingers propel the lubricant back to the reservoir for reuse.

Abstract: A unitary plate type heat exchanger structure in which stacked core sheets, tube sheets, continuous frame members, nose pieces and corrugated fin material are joined together as by brazing to form a one-piece construction with integrated flow passages for at least one of the fluids. The parts combine with one another in a manner facilitating assembly and obviating separate attachment of a manifold means. Interior parts, including nose pieces, frame members and tube sheets are structured inherently to provide flow passages for a confined fluid. In the brazing process the parts are interconnected in a manner to resist deformation and separation of formed joints, and, means are installed to obviate the effects of high internal pressure, particularly at confined fluid inlet and outlet locations.