Abstract: A fluid pump is arranged to employ cooperating gears that are arranged for axial displacement relative to one another, whereupon a volumetric chamber positioned between a surrounding housing and one of a plurality of inter-nesting first and second cylindrical housings permits displacement of the first and second cylindrical housings towards one another that in turn effects axial displacement of the gears relative to one another to control inter-engagement and associated volumetric displacement relative to the gear structure.

Abstract: The invention relates to a coupling assembly for connecting two members. The coupling assembly prevents excessive radial movement, scrubbing of the coupling members, and leakage of fluid being transferred through the coupling. The coupling assembly includes a tube end having a pair of spaced apart annular beads defining a groove for a resilient seal ring seated in the groove and the other member defined a bore for receiving the tube end. A guide ring substantially centers the tube in the bore whereupon a clamping assembly releasable connected to the tube is clamped to the other member securing the tube in the centered position while permitting limited axial movement of the tube.