Pumps – Motor driven – Relatively movable pumping members driven by relatively...
Patent
1985-01-16
1987-06-30
Smith, Leonard E.
Pumps
Motor driven
Relatively movable pumping members driven by relatively...
417347, 417552, F04B 2306, F04B 910
Patent
active
046767240
ABSTRACT:
A multicylinder, improved mud pump is disclosed, the preferred embodiment incorporating a hydraulically powered piston in a cylinder which connects with a piston rod which, in turn, drives a second piston in a cylinder adapted to pump mud. The first piston is driven by fluid from a rotary distribution valve, with the distribution valve being driven independently from the movement of the piston; also, the piston can be driven on its return stroke by entrapped fluid routed from a second cylinder, or the piston can be driven on its return stroke by fluid routed from the valve. Additinally novel valving means is disclosed for the rotary distribution valve and novel hydraulic drive circuitry is disclosed, also novel mud pumping valve and piston arrangements are disclosed.
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