142729 ⎘
Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each pump piston in the two directions being obtained by a double-acting piston liquid motor
Sub-classes:Device and method for the provision of pressurized medium for injection into a high pressure process
#2Pressure reduction in high pressure processing system
#3Viscous material pump with adjustable limitation of the delivery pressure
#4System for high pressure, high shear processing of fluids
#5Hydraulic distributor for pump
#6Hydrostatic energy generator
#7Deviation tolerant well plunger pump
#8System and method for controlling motion profile of pistons
#9Pump arrangement with two pump units, system, use and method
#10PRECOMPRESSION EFFECT IN PUMP BODY
#11Concrete pump
#12Multi-pump sequencing
#13Apparatus and method for pumping a cryogenic fluid from a storage vessel and diagnosing cryogenic pump performance
#14Apparatus and method for pumping a fluid from a storage vessel and detecting when the storage vessel is empty
#15Cylinder assembly for providing uniform flow output
#16Method of operation of a reciprocating positive-displacement pump and reciprocating positive-displacement pump
#17Concrete-mortar transfer system of concrete pump car
#18Rodder pump
#19Displacement shift valve and pumping apparatus and methods using such a valve