142719 ⎘
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 only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting liquid motor, e.g. actuated in the other direction by gravity or a spring
Sub-classes:Linear compressor
#2Wave driven variable leverage pump for water desalination
#3HYDRAULIC PUMPING SYSTEM WITH PISTON DISPLACEMENT SENSING AND CONTROL
#4PRESSURE-DRIVEN METERED MIXING DISPENSING PUMPS AND METHODS
#5Rod pump having a hydraulic cylinder and a variable speed reversible motor-generator
#6Linear compressor
#7Method for operating a piston compressor, and piston compressor
#8Hydraulic pumping system
#9Muscle-powered pulsation device for long-term cardiac support
#10Method and system for energy recovery from a rod pump
#11Linear compressor
#12Metering mechanism for a pump, methods for locking and unlocking such a mechanism
#13Hydraulic pressure amplifier arrangement
#14Proportional metering pump, method for assembling and disassembling such a pump
#15Displacement amplifying mechanism and liquid ejecting apparatus using the same
#16Lift apparatus for driving a downhole reciprocating pump
#17Pressure-driven metered mixing dispensing pumps and methods
#18Downhole pump system
#19Pressure-driven metered mixing dispensing pumps and methods
#20Systems and methods for hydrate management
#21Lift apparatus for driving a downhole reciprocating pump
#22System and method for cleaning a vehicle-mounted sensor
#23HYDRAULIC ACTUATOR FOR CRYOGENIC PUMP
#24Hydraulic pumping system with piston displacement sensing and control
#25Method of operating cryogenic pump and cryogenic pump system
#26Hydraulic oil well pumping system, and method for pumping hydrocarbon fluids from a wellbore
#27Diaphragm pump with dual spring overfill limiter
#28SWITCHING ASSEMBLY FOR A HYDRAULIC PUMP JACK
#29Pressure-driven metered mixing dispensing pumps and methods
#30Travel end expansion valve for piston type pressure converter
#31Pneumatic piston pump metering and dispense control
#32SWITCHING ASSEMBLY FOR A HYDRAULIC PUMP JACK
#33Piston pump and motor
#34Fracturing pump assembly and method thereof
#35Hydraulic gravity ram pump
#36Hydraulic ram liquid suction pump apparatus and methods
#37Mobile delivery platform for flowable explosive
#38SWITCHING ASSEMBLY FOR A HYDRAULIC PUMP JACK
#39MULTICHAMBER AND MOTOR PUMPS WITH SEVERAL CHAMBERS PER MOTOR PUMP
#40Ultra-low friction air pump for creating oscillatory or pulsed jets
#41Hydraulic gravity ramp pump
#42Mobile delivery platform for flowable explosive
#43Hydraulic machine, in particular hydraulic motor, with a reciprocating movement
#44Hydraulic machine, in particular hydraulic motor, with a reciprocating movement, and differential piston for such a machine
#45Hydraulic machine, in particular hydraulic motor, and metering device comprising such a motor
#46The Operation of a Pressure Generator
#47Device for Concentrating a Liquid, and Differential Piston Pump
#48HYDRAULIC OIL WELL PUMPING APPARATUS
#49Hydraulic device with a lubricating pump
#50Boost Valve for a Concrete Transfer Pump Lubricating System
#51Check valve structure for use in pump of hydraulic cylinder
#52Method for utilizing pressure variations as an energy source
#53Ultra-low friction air pump for creating oscillatory or pulsed jets
#54INFUSION PUMP WITH A CAPACITIVE DISPLACEMENT POSITION SENSOR
#55Check Valve for Displacement-Type Pump
#56Method for providing a fertilizer and a fertilizing system
#57Hydraulic gravity ram pump
#58Highly efficient durable fluid pump and method
#59Method and apparatus to pump liquids from a well
#60Fluid supply unit having an integral pressure generator and pressure booster
#61Pump apparatus
#62Hydraulic motor arrangement and method of operating a hydraulic motor
#63Method and apparatus for compressing a gas to a high pressure
#64Hydraulic gravity ram pump
#65Device, method and system for changing flexibility of a sheet structure