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| Number | Title | Issue Date |
| 7758321 | Pump apparatus A pump apparatus comprises a piston, which is provided displaceably along a first chamber formed in a body under the action of a pilot pressure, an indirect medium composed of a non-compressive fluid and which is to be pressed by the piston, and a diaphragm that is ... | 07/20/2010 |
| 7284966 | Micro-pump A micro-pump having a first layer, a second layer and an intermediate flexible layer is disclosed. The first layer and second layer may be of moldable plastics. The intermediate layer may be a substantially flat PDMS membrane layer having an inlet hole and an outlet... | 10/23/2007 |
| 7273465 | Device and methods for body fluid flow control in extracorporeal fluid treatments Disclosed are devices and methods for the control of body fluid flow in the extracorporeal treatment of body fluid. Body fluid flow through on of a body fluid flow circuit (10, 50, 60, 100 or 250) is controlled by alternating applying vacuum pressure a... | 09/25/2007 |
| 7273446 | Methods, devices and systems for counterpulsation of blood flow to and from the circulatory system Counterpulsation methods and systems for assisting the heart of a patient involve, for example, coordinating the operation of a pulsatile pump to suction blood from an artery through a first conduit while the heart is in systole and expel the blood into the first co... | 09/25/2007 |
| 7230357 | External rotor motor and method for assembling such a motor A method of rapidly assembling the rotor (22) of an external-rotor motor (20) onto a bearing support tube (70) and in a predetermined axial position relative to the latter, includes the steps of: beginning at a rotor cup portion (24) of t... | 06/12/2007 |
| 7229402 | Minimally invasive ventricular assist technology and method The present invention is a cardiac-assist device and technique used to maintain a patient's cardiac output when normal cardiac output is insufficient. Blood is removed from a selected ventricle using an arterial or venous side approach. The use of a right side appro... | 06/12/2007 |
| 7144365 | Implantable heart assist system and method of applying same An extracardiac pumping for supplementing the circulation of blood, including the cardiac output, in a patient without any component thereof being connected to the patient's heart, and method of using same. One embodiment of the extracardiac system comprises a pump ... | 12/05/2006 |
| 7134849 | Molded disposable pneumatic pump A mechanical pump having a unitary construction such that the fluid being pumped is prevented from leaking without requiring the use of discrete seal elements. The absence of discrete seal elements and integral coupling of various components of the pump substantiall... | 11/14/2006 |
| 7125376 | Implantable heart assist system and method of applying same An extracardiac pumping for supplementing the circulation of blood, including the cardiac output, in a patient without any component thereof being connected to the patient's heart, and methods of using same. One embodiment of the intravascular extracardiac system co... | 10/24/2006 |
| 7033148 | Electromagnetic pump An electromagnetic micropump for pumping small volumes of liquids and gases comprises a magnetic actuator assembly, a flexible membrane and a housing defining a chamber and a plurality of valves. The magnetic actuator assembly comprises a coil and a permanent magnet... | 04/25/2006 |
| 7021909 | Oscillator for pneumatic pump having single valve A pneumatic oscillator for providing pumping force to a pump. The oscillator has a single valve for controlling both the rate of oscillation of the oscillator and the flow of air. The valve includes a shuttle member and a detent mechanism. The detent mechanism contr... | 04/04/2006 |
| 6887047 | Pneumatic pinch mechanism for a deformable tube A pinch mechanism, which can be used as part of a pump, includes a deformable tube (10) enclosed within a body (11) which has a first chamber (11a). The deformable tube (10) defines a flow passage. A second chamber (19) is c... | 05/03/2005 |
| 6790010 | Switching system for a reciprocating piston pump A pumping system. The pumping system has a cylinder pump, a first group of switching devices, and a second group of switching devices. The first group of switching devices enable the cylinder pump to pump the liquid by feeding the gas provided by the gas source into... | 09/14/2004 |
| 6644940 | Restarting device for a fluid operated double diaphragm piston pump A restarting device of a pump including a center rod defining fluid delivering chambers and driving chambers 11b and 12b. The restarting device of the pump further includes: a change-over valve 2 for switching a direction for the center rod to move, and a... | 11/11/2003 |
| 6619930 | Method and apparatus for pressurizing gas A system and method for compressing gas uses a hydraulic pump and a hydraulic accumulator to compress gases in gaseous form. The accumulator is divided into a hydraulic chamber and a pneumatic chamber. The pneumatic chamber of the accumulator can be pneum... | 09/16/2003 |
| 6422834 | Reversing valve for a diaphragm pump A valve arrangement including a valve housing (10) which includes an inlet port (11) and two outlet ports (12, 13) for fluid flowing through the housing. A valve element (15) is accommodated in a first valve space in the valve housing and movable between ... | 07/23/2002 |
| 6419463 | Reversing valve for a diaphragm pump A valve housing (10) includes an inlet port (11) and two outlet ports (12, 13) for fluid passing through the housing. A valve element (15) accommodated in the valve housing is moveable freely between two end positions and has two surfaces (16) each adapte... | 07/16/2002 |
| 6244836 | Well pump actuated by natural gas A pneumatic pump pumps liquids from natural gas wells. First and second pneumatic rams have first and second pistons housed in first and second cylinders with a lifting beam connecting the first and second pistons above the first and second cylinders and ... | 06/12/2001 |
| 6123519 | Delivery blood storing member-equipped blood reservoir tank and blood delivery instrument for extracorporeal circulation circuit A delivery blood storing member-equipped blood reservoir tank has a blood reservoir tank portion, and a delivery blood storing member that communicates with a blood outlet formed in the blood reservoir tank portion. The delivery blood storing member allow... | 09/26/2000 |
| 5931646 | Blood delivery instrument for regulating the amount of blood stored in an accumulator independent of the pumping operation A blood reservoir includes a blood tank, a blood accumulator connected in fluid communication with an outlet of the tank for receiving blood from the tank, and a pumping device for driving the accumulator to displace blood out of the accumulator. The accu... | 08/03/1999 |
| 5499909 | Pneumatically driven micro-pump A micro-pump is disclosed for pneumatically causing a bulging/retracting motion of a plurality of micro-diaphragms disposed in an array along a channel through which a fluid is being driven. The pump includes channel means (10) including a first port (11)... | 03/19/1996 |
| 5421208 | Instantaneous volume measurement system and method for non-invasively measuring liquid parameters A non-invasive technique and system is provided for measuring flow of liquid driven by a flexible diaphragm of a membrane pump (18). Flow, pressure and/or temperature of a gas, such as air, used to drive the pump (18) is continuously monitored. Instantane... | 06/06/1995 |
| 5265421 | Underwater hydraulic system for reducing liquidborne noise An hydraulic liquid system wherein a pump moves liquid from one location to another such as in supplying one or more loads in an underwater environment. The system includes two hydro-pneumatic chambers utilized such that one is filled by liquid from the p... | 11/30/1993 |
| 5262068 | Integrated system for filtering and dispensing fluid having fill, dispense and bubble purge strokes An integrated system and method are disclosed for filtering a fluid and for dispensing a desired volume of the fluid. The integrated system includes a feed pump sub-assembly for receiving fluid and for directing the fluid through a filter. A filtration su... | 11/16/1993 |
| 5193986 | Fluid pump A fluid pump is provided which comprises a valveless pump chamber, a tube for conveying fluid, a conduit connecting the pump chamber and tube in fluid pressure communication, and at least one valve connected to the tube and adapted to permit a flow of flu... | 03/16/1993 |
| 5092743 | Pneumatically controlled pump A pump of extremely simple manufacture, requiring no maintenance, is made up of a tubular body (1) closed at each end by end pieces (10a and 10b), orifices (15a and 15b) of which are respectively connected to a pneumatic control circuit (4) and to the cir... | 03/03/1992 |
| 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 event of power and air pressure failures and manually actuate... | 07/11/1989 |
| 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 non-invasively senses the circulatory system requirements of t... | 08/18/1987 |
| 4630597 | Dynamic aortic patch for thoracic or abdominal implantation An improved dynamic aortic patch is constructed with an elongate semi-rigid shell member having a concave inner surface and a flexible membrane integrally bonded to the outer surface of the shell to define an inflatable and deflatable chamber between the ... | 12/23/1986 |
| 4427470 | Vacuum molding technique for manufacturing a ventricular assist device A ventricular assist device and a method of manufacturing the ventricular assist device. The device is generally flat in shape and gently curved so that it may be comfortably implanted under the skin or inside the chest of a patient. The device includes a... | 01/24/1984 |
| 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 to limit the flow to one direction. A middle portion of the... | 09/21/1982 |
| 4303376 | Flow metering cassette and controller A cassette and controller for accurately controlling fluid flow through an administration set while maintaining a closed fluid system. Inlet and outlet conduits are defined in a body of the cassette and inlet and outlet valves control fluid flow through t... | 12/01/1981 |
| 4265600 | Pump apparatus A pump for transferring precise amounts of fluid from a container to a patient. A pump apparatus has a defined volume pump chamber divided by a diaphragm into a pumping fluid portion and a pumped fluid portion. The pumped fluid portion receives and exhaus... | 05/05/1981 |
| 4245622 | Inflatable/deflatable device for a heart-assist pump An inflatable/deflatable device for use in a body-implantable heart-assist pump. The device includes an inflatable/deflatable central portion, and a noninflatable, generally planar marginal portion joined thereto. In a preferred construction, the device i... | 01/20/1981 |
| 4240409 | Apparatus for assisting circulation of blood Apparatus is disclosed for mechanically assisting circulation of blood in a patient for periods of up to a week or two until the patient's heart strengthens sufficiently to take over the full workload. The circulatory assist device includes a valveless pu... | 12/23/1980 |
| 4222127 | Blood pump and method of pumping blood A blood pump for implant or paracorporeal use having a rigid case with inlet and outlet valves defining a pumping cavity; an integral thin walled flexible sac freely confined within a pumping cavity; and a flexible diaphragm within the cavity conforming t... | 09/16/1980 |
| 4195623 | Parallel aorta balloon pump and method of using same A parallel aorta passageway is provided with its upper end being connected to the aorta in close proximity to the heart. The opposite ends of the parallel aorta are grafted to the aorta without interrupting the blood flow through the heart and circulatory... | 04/01/1980 |
| 4187845 | Apparatus for feeding anesthetic and/or life sustaining gases during a surgical procedure A mechanically operable bellows for feeding anesthetic and/or life sustaining gases to a patient during a surgical procedure.... | 02/12/1980 |
| 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 the housing to repetitively collapse the bladder and establ... | 01/09/1979 |
| 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 elongated driver balloon and a similar blood pumping balloon p... | 09/26/1978 |
