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6846166 |
Reciprocating diaphragm pump with degassing valves
In a reciprocating pump, drive power of a drive-power supply member is transmitted to a diaphragm within a diaphragm drive chamber via operating fluid. An operating-fluid-flow regulation chamber...
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6561774 |
Dual diaphragm pump
A dual diaphragm pump comprises a first chamber, a second chamber, a mechanical link, and a drive mechanism. The first chamber comprises a first cavity and a first diaphragm. The first chamber...
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5934886 |
Metering pump with piston and diaphragms
A diaphragm pump is powered by fluctuating pressure in a pressurized conduit. A three way valve is cycled to alternately pressurize and vent the pump. A power diaphragm drives a piston having a...
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5720177 |
Multichambered pump for a vapor compression refrigeration system
A device and method of operating a diaphragm pump having at least three chambers is used in a vapor compression refrigeration system. Each chamber contains a fluid having a different set of...
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5667368 |
Diaphragm metering pump including improved leak detection diaphragm
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...
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5649813 |
Chamber insulation for prevention of icing in air motors
Insulation is provided in the form of wall insulation, piston or diaphragm insulation and/or piston rod and/or diaphragm washer insulation to increase the temperature in the working air chamber of...
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5642576 |
Suction dredge pump apparatus
A suction dredge pump apparatus includes a manifold having a body defining a plurality of compartments, an intake chamber disposed adjacent to the compartments along upper ends thereof, a plurality...
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5641270 |
Durable high-precision magnetostrictive pump
A magnetostrictive pump is provided which makes use of a magnetostrictive element which, when an alternating magnetic field is applied to it, compresses a chamber containing a working fluid. A...
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5616012 |
Ammonia pump
The pump is formed by a body having a cavity with a piston chamber in which a piston is reciprocated. A rotatable crank shaft is provided to reciprocate the piston along inward and outward strokes...
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5391060 |
Air operated double diaphragm pump
The design of an air operated double diaphragm pump provides improved assembly, mounting flexibility, multiple plumbing combination including check valves which allow the pump to be mounted in any...
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5388576 |
Inflatable resuscitation device
A pulmonary resuscitator is set forth of the type having a compressible bladder to be depressed to supply air to a mask. Both the compressible bladder and mask have integral therewith a network of...
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5370507 |
Reciprocating chemical pumps
Chemical pumps are disclosed in which all parts wetted by the fluid being pumped are made of fluoroplastic material, with the pumps having check valves that include floating ball members and...
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4975026 |
Free-piston heat pump
An end stop is disclosed for limiting the maximum displacement of a flexible member so as to minimize stress on this member and thus provide an extended surface life. The flexible member is rigidly...
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4886428 |
Pump arrangement, particularly for pumping water from deep wells
A pump arrangement particularly intended for pumping water from deep wells, in which a feed pump unit (2) located at ground level transmits power and motion to delivery pump unit (3), so that...
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4846831 |
Manual back-up drive for artificial heart
A manual back-up emergency drive device for air driven artificial hearts, particularly for the "Jarvik-7" heart, is adapted to be instantly connected to the air drive lines for the heart in the...
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4687424 |
Redundant piston pump for the operation of single or multiple chambered pneumatic blood pumps
A redundant, pneumatic driver for a blood pump in which a pair of pistons are contained in a common cylinder and their stroke rates and lengths are selectively controlled by a controller which...
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4560324 |
Automatic purger for a hydraulically controlled double diaphragm pump
The automatic purger has an intermediate chamber (11) one of the walls of which is formed by an elastic diaphragm (10), termed front diaphragm, whereas the other wall is formed by a second elastic...
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4536136 |
Film-made pump driven by the filling effect of a fluid on filling into a chamber made of film
A method and apparatus advantageously using the shapeless and flowing characteristics of a fluid. The fluid is contained with a suitable film chamber having a given shape; a frame or the like may...
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4524466 |
Continuous rotation reversible pitch axial thrust heart pump
A continuous and unidirectional rotation reversible pitch axial thrust heart pump having a blood handling housing with first inlet and outlet check valves connected to the housing and second inlet...
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4430048 |
Diaphragm pump with a diaphragm clamped in pressure-balancing arrangement
In a diaphragm pump the diaphragm separating the delivery chamber from the working chamber is clamped between a cylinder body and a cylinder cover in pressure-balancing arrangement. For this...
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4350477 |
Pneumatic pulsatile fluid pump
A portable pumping system for administering fluids intravenously to a patient. The system has a tube connected between the fluid source and the patient with one-way valves at each end of the tube...
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4344743 |
Piezoelectric driven diaphragm micro-pump
A piezoelectric driven variable volume having a chamber pump with a flexible tube and a non-compressible fluid therein. Solenoid operated valves are associated with the inlet and outlet of the...
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4178133 |
Double-acting flexible tube pump
A pump, characterized by flexible tubes which are cyclically expanded and contracted to cause fluid to be pumped, comprises a pair of liquid filled cylinders each containing a flexible tube...
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4173796 |
Total artificial hearts and cardiac assist devices powered and controlled by reversible electrohydraulic energy converters
Total artificial hearts and circulatory assist devices, including left ventricular assist devices. The invention relates to electrohydraulic energy converter systems, whereby electric energy from a...
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4158530 |
Pumping apparatus comprising two collapsible chambers
A pump having two collapsible pumping chambers connected in series is coupled to a pump drive mechanism which opens and closes each chamber in a sequence that produces pumping action.
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4133616 |
Stroke volume limiter for collapsible wall blood pump system
A pneumatic pump adapted primarily as a left ventricular heart assist device includes a flexible bladder with a rigid housing. A pneumatic driver applies rhythmical pulses between the bladder and...
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4116589 |
Extracorporeal pulsatile blood pump comprised of side by side bladders
Extracorporeal blood pumping apparatus for use, for example in cardiopulmonary bypass procedures, left ventricle assist, hemodialysis and the like. The pulsatile pump apparatus may comprise an...
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4056095 |
Control device for medical and surgical uses
A control device in implantable sub-cutaneously for use in medicine and surgery. It is actuable by pressing on a sub-cutaneous membrane. It comprises a first chamber closed by the membrane which is...
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4015590 |
Balloon activated blood pump
A pneumatically driven balloon activated blood pump for connection either in parallel with or to one side of the heart for temporary mechanical support of an inadequately functioning heart. A...
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3955557 |
Blood pump for use in an artificial heart or such purpose
This invention relates to a blood pump for use in an artificial heart including an inlet pump system and an output pump system in series with each pump including branch tubes communicating with...
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3951572 |
Apparatus for pumping cement slurry
A system for pumping cement slurry comprising two pumps connected in parallel in a piping system, each pump comprising a flexible tubular bladder connected between two tubular elements and...
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3937599 |
Pumping system using solar energy
A pumping system comprising a pumping unit formed by a motor and a pump and adapted to raise a liquid from an underground level to a utilization level, a vaporizable fluid flowing in a closed...
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3923426 |
Electroosmotic pump and fluid dispenser including same
A miniature electroosmotic pump and fluid dispenser including the pump are disclosed. The pump comprises a plexiglass housing having a fluid inlet and outlet, a pair of spaced silver-silver...
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3916449 |
Implantable heart pump
An implantable Starling-type heart pump which may be adapted for use as a total artificial heart, or as a single ventricle device replacing one side of the heart. A rigid case, mounting blood input...
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3859011 |
DIAPHRAGM PUMPS
A diaphragm pump comprising a drive shaft, a plurality of cylinders whose axes are equi-angularly spaced about the drive shaft axis and each of which axes is normal to the drive shaft axis, a...
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3807446 |
RESPIRATOR SYSTEM
A respirator system for delivering accurate portions of pressure regulated gas at a controlled flow rate consisting of a gas delivery system having two chambers with communicating liquid-filled...
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3791767 |
DIALYSIS PUMPING SYSTEM
This invention relates to a dialysis pump and pumping system primarily designed for the pumping of blood for purification in an "artificial kidney machine" using the recently announced system of...
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3790305 |
THERMAL-GRAVITY FLUID PUMPING METHOD AND APPARATUS
A large volume pumping method and apparatus comprising an economical thermal-gravity pumping system which is non-polluting, and employs relatively free and limitless, generally available, sources...
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3771920 |
PUMP MEANS
A pump, particularly for use in discharging foul gases from the bottom of a boat, comprises two intercommunicating compartments partly filled with liquid so that, during rocking of the boat, the...
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3692018 |
CARDIAC ASSISTANCE DEVICE
A cardiac assistance device is disclosed which produces a uni-directional pumping action assisting the heart when the device is activated after it has been introduced into a blood vessel by...
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3640647 |
DIAPHRAGM PUMP
This disclosure is directed to a diaphragm pump having a crankcase housing to which there is connected a pump casing and a cooperating piston assembly. A flexible, cup-shaped diaphragm is...
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3637330 |
MULTICHAMBER TUBULAR DIAPHRAGM PUMP
A tubular diaphragm pump, particularly useful for pumping corrosive fluids at relatively high-uniform pressures, such as in reverse osmosis systems. A work fluid is driven in phased sequence inside...
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3633217 |
ELECTROMAGNETIC ENERGY CONVERTER FOR PULSING AN IMPLANTABLE BLOOD PUMP
In an artificial heart system suitable for permanent implantation within a human body, electrical power from an external source including a portable battery pack and a converter is transmitted...
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3630644 |
FLUID PUMP AND ACTUATION THEREOF
The invention disclosed resides in a pump operating on what are generally thought of as "peristaltic" lines, and in which a flexible-walled duct is the pumping chamber and is surrounded by a cell...
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3604213 |
CHEMICAL GROUTING PROPORTIONING PUMPING METHOD AND APPARATUS
Grouting reactants are mixed from separate supplies before delivery by driving a hydraulic pump and creating a constant flow of hydraulic fluid, dividing the hydraulic flow into two rotary...
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3507583 |
PUMP FOR LIQUIDS
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3485176 |
PUMPING SYSTEM
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3421373 |
FLUID FLOW METERING SYSTEM
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3402667 |
Fluid power transfer apparatus
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3362336 |
Wave motion operated device
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