Abstract: A positive displacement reciprocating multi-cylinder pump has a pair of cams and associated bearings and yokes that cooperatively and positively reciprocate the pistons. The fluid flow paths are configured through specially designed intake and outlet manifolds to provide intrinsic cooling of the bearings through specially configured fluid flow paths at distal ends of the pump. An intentional head geometry that is identical for each piston may be readily machined using exterior bores. Each head defines a cylinder, captures both inlet and outlet one-way valves, and provides essential fluid flow paths about the cylinders. All bearings are of the sealed type, and no additional oil baths or the like are required, permitting the pump to be stored, transported, and used in any orientation.

Abstract: A water mist cooling system including a reverse osmosis apparatus for producing pure water at an outlet. A plurality of misting nozzles are serially connected by hollow tubing means to form a line having two ends. A pump has an inlet connected to the outlet of the reverse osmosis apparatus, and an outlet connected to a first of two ends of a line of nozzles. The pump is controlled whereby pure water is pumped by the pump at a preselected pressure through said hollow tubing means to the misting nozzles and thence exiting the nozzles as pure water mist to the atmosphere.