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Match Document Document Title
8602750 Liquid supply device  
A drive characteristic and durability of a liquid supply device having a flexible pump member such as a bellows are improved. A drive pump in the liquid supply device has a bellows as the pump...
8591200 Hydraulically controlled reciprocating pump system  
A system for pressurizing a working fluid includes a cylinder having an outlet through which the working fluid is exhausted at a discharge pressure, a plunger translatably disposed within the...
8137076 Method and system for raising a liquid using a pressurised gas and a buoyant, movable interface member  
A method and a device for extracting a liquid from a liquid pond, wherein in a first phase air is removed from an airtight reservoir, a venting and a rising pipe in order to create depression...
7871250 Chemical liquid supplying apparatus  
A chemical liquid supplying apparatus can discharge chemical liquid with high accuracy and monitor a leakage of an incompressible medium from a region between a piston and a cylinder. A pump has a...
7665974 Diaphragm pump position control with offset valve axis  
A hydraulically driven pump includes a diaphragm, a piston, a transfer chamber, a fluid reservoir, and a valve spool. The transfer chamber is defined between the diaphragm and piston and is filled...
7654801 Hydraulically-actuated diaphragm pump with a leak compensation device  
A diaphragm pump including, in a pump body, a hydraulic control chamber disposed between a piston for executing reciprocating motion and the diaphragm, the pump including elements for compensating...
7425120 Diaphragm position control for hydraulically driven pumps  
A hydraulically driven pump includes a diaphragm, a piston, a transfer chamber, a fluid reservoir, and a spool member. The transfer chamber is defined between the diaphragm and piston and is...
7311502 Method for using a hydraulic amplifier pump in ultrahigh pressure liquid chromatography  
A method for supplying solvent to an ultra-high pressure liquid chromatography system using a hydraulic amplifier. The hydraulic amplifier system includes a hydraulic cylinder comprising a primary...
7090474 Diaphragm pump with overfill limiter  
A diaphragm pump which overcomes the problem of diaphragm failure due to overfill of the oil transfer chamber. An overfill preventive element in the form of a mechanical stop, a fully closed coil...
6899530 Diaphragm pump with a transfer chamber vent with a longitudinal notch on the piston cylinder  
A diaphragm pump which overcomes the problem of diaphragm failure due to overfill of the oil transfer chamber and the inability to self-prime. A notch is provided in the upper portion of the...
6767189 Method for the control and regulation of the oil pressure-gas pressure relationship of diaphragm compressors  
A method for the control and regulation of the oil pressure-gas pressure relationship of diaphragm compressors. The function of a diaphragm compressor is mainly dependent on a given minimum...
6712587 Hydraulic amplifier pump for use in ultrahigh pressure liquid chromatography  
A hydraulic amplifier system for an ultra-high pressure liquid chromatography system. The hydraulic amplifier system includes a hydraulic cylinder comprising a primary piston chamber in which a...
6672841 Pumping and metering device  
The present invention relates to a pumping device for delivering and metering fluids, in particular medical fluids such as dialysis fluids, with a piston unit having a driving device and a piston...
6439083 Universal spring tool  
A tool or device is comprised of a generally cylindrical plunger that is retained in a generally cylindrical body. A spring fits inside the body to spring-load the plunger by means of a jam nut or...
6276907 Hydraulically driven diaphragm pump  
A diaphragm pump for pumping a fluid, such as paint, includes a diaphragm separating a first chamber for accommodating and dispensing the paint from a second chamber for accommodating a drive...
6264437 High pressure pump for all liquids  
A device enables the pumping of any kind of liquid while giving the liquid very high delivery pressure. The units that cause pumped liquid suction and then its delivery are driven exclusively by...
6264436 Multifunction valve  
A multifunction hydraulic valving apparatus includes a relief valve, a gas purge valve and a bleed valve disposed in a single bore.
6257850 Piston and seals for a reciprocating pump  
A piston and seals for a reciprocating pump improve pumping of subterranean fluids containing fine solids to surface. The pump comprises a pump barrel and piston. The piston is suspended from a...
6071089 Hydraulic diaphragm pump  
A high pressure hydraulic diaphragm pump having a pressure chamber on one side of a diaphragm and a fluid delivery chamber on the other side of the diaphragm with a reciprocating piston assembly...
5899671 Hydraulic driven diaphragm pump with mechanical diaphragm stroke limitation  
For a hydraulically driven diaphragm pump with a diaphragm consisting of at least two individual layers, these layers are clamped at least in their central area between a coupling part on the feed...
5860793 Diaphragm metering pump with push to prime air bleeder valve  
A new and improved diaphragm metering pump is provided with a modular removable drive assembly. The removable drive assembly provides rotation to an eccentric shaft within the pump and is disposed...
5810567 Hydraulic Diaphragm pump  
On a hydraulic diaphragm pump with a diaphragm including at least two individual layers, a dimensionally stable reinforcing element that moves together with the diaphragm and is kept in contact...
5730506 Vibration damper for damping vibrations in a fluid in a slip-controlled hydraulic brake system of a vehicle system  
A space-saving vibration damper that functions reliably for a long term. The vibration damper has a housing that includes at least one concave recess which is sealed by a disk-shaped diaphragm...
5707219 Diaphragm pump  
A diaphragm pump is provided having a plurality of piston inlets connecting a hydraulic fluid source with the piston chamber and a plurality of check valves each having a ball and valve seat...
5246351 Hydraulically driven diaphragm pump with diaphragm stroke limitation  
In a hydraulically driven diaphragm pump, which is provided with a diaphragm clamped on the edge which separates a delivery chamber from a hydraulic chamber, the hydraulic chamber being subdivided...
5192425 Mounting base and assembly for pressure sensor, filter and pressure relief valve  
Single-piece manifold for use in pressurized painting equipment which is configured and arranged for joining a liquid inlet line, a pressure sensor, a filter, a pressure relief valve, and one or...
5165869 Diaphragm pump  
A piston-driven fluid pump including a drive chamber containing drive fluid and a drive diaphragm forming a wall of the drive chamber. The pump also includes a spill containment chamber disposed...
5163820 Airless sprayer with adjustable pressure unloading valve  
A pressure unloading valve responsive primarily to the pressure of the outlet passage in a diaphragm pump. The pump includes a driving fluid chamber and a pump chamber separated by a flexible...
5106274 Hermetic compressor  
A high-pressure hermetic compressor suitable for use in a zero-gravity environment. The compressor includes a solenoid, driven by a power supply, which causes a plunger to reciprocate in an...
5069602 Fluid-powered subsurface pump  
A low volume, hydraulic powered pump for attachment to small diameter, coiled tubing for pumping subsurface liquids from hydrocarbon formations. The pump is easily run into existing production...
5059099 Integral pump housing  
An integral cylinder liner and pump housing formed of a die cast aluminum workpiece of the type having a surface hardness extending a minimum depth into the workpiece, the housing further includng...
4934906 High pressure diaphragm pump  
A diaphragm pump especially suited for use in a high pressure application. The pump is devised to replenish any hydraulic fluid lost from a motor chamber, especially that fluid forced past the...
4865528 Method and arrangement for starting an hydraulic diaphragm pump against load  
In a diaphragm pump, which is provided with at least one diaphragm (1), which separates a delivery chamber (4) from a pressure chamber (5) filled with an hydraulic fluid and is clmaped at its edge...
4828464 Diaphragm pump device  
In a diaphragm pump including a first chamber for liquid to be pumped separated from a second chamber for drive fluid by a diaphragm which is driven by a piston alternatively placing the drive...
4806082 Fluid actuated pump with improved flow-limiting fluid refill valve  
An improved flow-limiting fluid refill valve for use with a fluid-actuated pump having a fluid chamber comprises a valve housing, fluid inlet means in communication with a source of hydraulic...
4789313 Apparatus for and method of pumping output fluids such as abrasive liquids  
A technique for pumping an output fluid, especially a particle-laden abrasive liquid. This technique utilizes an output pump and a drive pump which are interconnected through a common chamber...
4784579 Hydraulic-pneumatic power transfer unit  
Disclosed herein is a hydraulic to pneumatic power transfer unit which converts a high pressure oil flow into a flow of high pressure air by means of three stages of piston pumps and characterized...
4776774 Hydraulic double-acting hydropneumatic pressure multiplying device  
In a hydraulic double-acting hydropneumatic pressure multiplying device suited for generating hydraulic pressure, and comprising a cylinder within which a piston is slidably mounted. The...
4768932 Hydraulic paint pump  
There is provided an improved airless paint spray pump having an intake, an inlet valve assembly, a pumping chamber, an outlet, an outlet valve assembly, and stroke pumping means for pumping the...
4749342 Diaphragm pump with hydraulically driven rolling diaphragm  
In a diaphragm pump with a diaphragm in the form of a rolling diaphragm that separates a delivery chamber from a fluid-filled pressure chamber and that with its peripheral edge is firmly clamped...
4705461 Two-component metering pump  
A proportioning pump with tandem diaphragm pumps each having a pumpage chamber connected with a source of supply and a mixer and dispensing nozzle, a piston pump for operating each of the...
4662828 Fuel injection pump by means of indirect control with elastic accessory  
Modification of the existing system of fuel injection pump, of a kind which moves little pistons catching controllable fuel amount, and compress such fuel until it is forced out through an...
4642098 IV system and controller and combination IV filter and pump assembly for use therein and method  
An IV filter and pump assembly having first and second bodies secured into a unitary assembly. The first and second bodies provide a chamber. One of the bodies has an opening therein in...
4619589 Diaphragm pump, particularly for dosing liquids  
In the case of a diaphragm pump, as is more particularly used for dosing or metering liquids and which is provided on the one hand with a dosing chamber with a suction and pressure valve and on...
4616982 Submersible high pressure pump  
A submersible pumping unit having a diaphragm pumping chamber connected to one end of an elongated tube, the interior of the tube being filled with hydraulic oil and a reciprocable solid of like...
4611974 Hydraulically operated well pump system  
A downhole well pump system comprises a reciprocating piston pump disposed in a fluid conduit in a wellbore which is filled with a driving fluid having a density preferably greater than the...
4599049 High pressure meter pump  
A high pressure meter pump system with improved accuracy is provided by subdividing a large meter pump capacity into metered subvolume charges which are incrementally delivered to a high pressure...
4564340 Device for regulating the pressure and feed volume of a diaphragm pump  
A device for regulating in a practically loss-free manner the pressure and feed volume of a diaphragm pump which is constructed as a hydraulically activatable diplacement pump and is especially...
4553910 Pulse driven hydraulic pump  
An apparatus (3) for pumping fluid from a fluid source (5) to a predetermined location (7) remote from the fluid source. The apparatus (3) comprises an hydraulically operated pump (9) having a...
4541365 Method and apparatus for supplying feedwater to a forced flow boiler  
An apparatus and method of supplying feedwater to a forced flow boiler or the like as described. A positive displacement pump having a plurality of discrete pumping elements is arranged to pump...

Matches 1 - 50 out of 136 1 2 3 >