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8622720 Reciprocating fluid pumps including magnets and related methods  
Reciprocating fluid pumps include a plunger configured to expand and compress in a reciprocating action to pump fluid, and one or more magnets carried by the plunger. The one or more magnets may...
7611331 Device and method for controlling a two cylinder thick matter pump  
A device and a method for controlling a two-cylinder thick matter pump comprising pistons that are actuated in a push-pull manner by means of a hydraulic reversible pump (6) and hydraulic drive...
6929454 Thick matter pump  
In a thick matter pump, especially for delivering concrete, comprising two delivery cylinders, it is known to provide two position sensors in one of the two cylinders for control of the pistons....
6779983 Sludge pump with management system  
A viscous material (sludge) pump, a method of accurately estimating output of such a pump and a method of efficiently managing such a pump. The pump can be the single or double cylinder variety....
6609898 Process and device for pumping compressible materials with reduced pressure pulsation  
A hydraulic system for a reciprocating piston pump that includes an accumulator for producing a steady-pressure supply of compressible material to a distribution nozzle. The hydraulic system...
5879137 Method and apparatus for pressurizing fluids  
A high-pressure valve assembly having a valve body that defines a preferably cylindrical valve cavity, a fluid inlet, a fluid outlet and a plurality of valve ports; and a fluid pressure...
5616009 Mud pump  
A multicylinder, double acting improved mud pump is disclosed. The preferred embodiment incorporates a hydraulic powered piston in a cylinder which connects with a piston rod which, in turn,...
RE35473 Sludge flow measuring system  
A system for the transport of high solids sludge includes a positive displacement pump for pumping sludge through a pipeline. The volume of sludge transported is accurately measured by determining...
5401140 Closed loop sludge flow control system  
A system and method for controlling operation of a sludge material handling system is disclosed. The sludge material handling system includes a positive displacement piston/cylinder pump, a sludge...
5267838 Severe service compressor system  
A severe service compressor for the reliable compression of dirty gasses using compressors with seals cooled by the hydraulic fluids doing the work of compression and seals isolated from the high...
5127806 Thick matter pump with downstream shutoff device  
A thick matter pump has two feed cylinders, each including an opening coupled in fluid communication with a material feed tank containing matter to be pumped. A tube switch is adapted to be...
5088898 Reciprocating pump  
A reciprocating pump comprises a plurality of pump sections, each pump section having a suction inlet and a discharge outlet, the inlets all connecting with a common passageway through which the...
5049038 Fluid compressors  
A two stage fluid compressor is operated by a pneumatically operated relay valve controlled by a fluidic switching device in which switching pulses of pressurized control air are obtained...
5024584 Pump unit with adjustable piston stroke length  
A pump unit comprising co-operating, push-pull connected reciprocating pumps for the pumping in portions of contents to packing containers on a packing machine. The reciprocating pumps (1) each...
4750869 Method and apparatus for boosting gas from a low-pressure source to a high-pressure receptacle  
Method and apparatus for transferring and boosting the pressure of gas from a source to a receptacle by sequentially filling and compressing volumes of gas by displacing same with a fluid...
4729720 Apparatus for continuously generating hydraulic pressure  
An apparatus for generating high hydraulic pressure with reduced pulsations, comprising a valve case attached to a motor main body and having a plurality of pneumatic cylinder units arranged...
4718826 Mobile pumping apparatus for abrasive slurries  
Mounted on a mobile platform, a dual hopper mixing tank having a hydraulically operated slide gate controlling the exit of a slurry. The mixed slurry is gravity fed to a pair of hydraulically...
4714411 Fluid pressure intensifier device  
A fluid pressure intensifier device particularly suited for intensifying the pressure of a gas has a plurality of piston and cylinder compression stages of sequentially reducing volume connected...
4690622 Liquid intensifier unit  
The unit comprises three liquid intensifiers, coupled together in juxtaposition, and fixed between a pair of plates. A support plate at the one end of the intensifiers mounts a rotary valve which,...
4687422 Continuous extrusion apparatus  
A dual pump is disclosed in which a single valve controls flow of power fluid to the pump piston. Cams on the pistons and push rods on the valve interact to control the valve timing.
4611973 Pumping system and method of operating the same  
Improved mud pump comprised of plural cylinder pumping units, each cylinder unit consisting of a pumping compression chamber and two or more hydraulic driven expansion chambers, with one or more...
4606709 Liquid pump with sequential operating fluid pistons  
An intensifier pump has a primary fluid cylinder including a primary piston and which has shaft portions received within a separate coaxial fluid chamber. A secondary fluid cylinder having a...
4527959 Drilling fluid pump providing a uniform, controlled pressure and flow rate  
A pump is provided for circulating drilling fluid and the like into a well during a well drilling process. The pump comprises a pair of double-ended piston assemblies hydraulically reciprocated in...
4494912 Energy conserving air pump  
An energy conserving air pump includes an air operating pump section and a separate fluid pumping section capable of handling pure fluids in concentrate form or in solution, and operates by the...
4269569 Automatic pump sequencing and flow rate modulating control system  
The present invention relates to a control system for automatic, continuous sequencing and modulating the flow rate of a plurality of high pressure pumps, having specific, albeit not exclusive...
4213298 Self-reversing hydraulic control system and self-reversing pump incorporating such system  
A self-reversing hydraulic control system for use with a device to be driven in opposite directional modes, especially a self-reversing pump driven by such a device. The system depends upon a flow...
4103490 Apparatus for harnessing tidal power  
An apparatus for harnessing and extracting a portion of the power generated by the rise and fall of ocean tides. A tidal chamber is provided wherein the rise of the tide creates positive air...
3583834 PRESSURE PUMPING SYSTEM UTILIZING PILOT FLUID  
New and improved pressure pumping system utilizing a pilot fluid is provided and comprises means to pressurize a pilot fluid for flow at substantially constant flow rate to fluid pressure exchange...
3560114 PUMP  
3554672 HOT GAS ENGINE WITH ACCUMULATOR TYPE GAS COMPRESSOR  
3496879 FLUID PUMP WITH PLURAL ACCUMULATORS  
3473189 MULTI-CHANNEL STUFFING SYSTEM  
3367272 Hydraulic power converter  
3335666 Pulsator pumps  
3331329 Single acting twin cylinder pump or compressor  
3327640 Pump for sausage mixture or the like  
3305097 High pressure peristaltic pump for separation apparatus  
3304126 Material handling apparatus and methods  
3239100 Foam depositor system  
3213804 Fluid pressurizing system  
3212447 Pumps  
3208448 Artificial heart pump circulation system  
3175499 Piston pump having a variable stroke  
3135210 Hydraulic pressure boosting device  
3085512 Fluid pump  
3080820 Pumping system  
3056384 Apparatus for the deposition of liquid materials  
3022738 Pump systems  
2948221 Pumps for liquids  
2913986 Devices for injecting fuel or other media into internal combustion engines  

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