Oscillating-deflector pump

An oscillating-deflector slurry pump comprising:

• a pair of cylinder assemblies coaxially aligned one on either side of a centrally-disposed oscillating-deflector element;
• each said cylinder assembly having a housing, in which are defined registering coaxial hydraulic and slurry cylinder bores, and a piston rod having, at one end thereof, a hydraulic piston head slidably movable within said hydraulic cylinder bore and having, at the other end thereof, a slurry piston head slidably movable within said slurry cylinder bore;
• said oscillating-deflector element being a substantially solid cylinder having an axis of rotation normal to the longitudinal, reciprocal axes of said hydraulic cylinder and slurry cylinder bores, and having defined therein two arcuately-formed communication passageways, each communication passageway opening being normal to an adjacent communication passageway opening;
• said oscillating-deflector element oscillates together with an axial shaft, one end of which operates so as to oscillate the said element and the other end of which carries valve means which controls selection of the direction of oscillation of the said element;
• the movement of said oscillating-deflector element being by means of a gear quadrant carried by said one end of said axial shaft and which is connected to operate said shaft via a reciprocating piston rod affixed to a co-acting gear rack and working in an indexing cylinder, and wherein said other end of said axial shaft carries a ported valve plate having means to control the said selection of the direction of oscillation of the said element;
• said two passageways in said oscillating-deflector element enabling communication, alternately, in a first position, between a slurry inlet conduit and a first one of the said slurry cylinder bores and, in a second position, between said slurry inlet conduit and a second one of the said slurry cylinder bores;
• said second slurry cylinder bore being in communication with a slurry discharge conduit when said slurry inlet conduit is in communication with said first slurry cylinder bore, in said first position;
• said first slurry cylinder bore being in communication with said slurry discharge conduit when said slurry inlet conduit is in communication with said second slurry cylinder bore, in said second position;
• and
• the oscillating-deflector element remaining stationary, during piston stroking, alternately in said two positions, so that uninterrupted, registered full bore areas are open to suction and discharge with minimum resistance being offered to slurry flow into and out of the slurry pump, thus ensuring pulsefree continuous discharge of slurry.