Abstract: 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 positioned side by side in a rigid casing or housing having preferably a one-way air valve. The inlet and/or outlets of both balloons are off-set and sloping ballon end portions are provided, inter alia, to minimize folding and/or rubbing during use. The driver balloon is provided with a port for coupling to a pressure-vacuum source and the blood pumping balloon is provided with an inlet port and an outlet port and both balloons are of such a cross sectional size and construction as to provide non-occlusive action by the blood pumping balloon.

Abstract: A pumping system using an air actuated bladder type member to propel liquids out and to refill the pump. Invention covers such novel pumps and an overall dispensing system. Useful in pumping and dispensing liquids generally and is especially useful in dispensing polyurethane chemicals.

Abstract: A compact blood pump includes a flexible bladder mounted within a rigid metal housing. Pneumatic pulses between the bladder and the housing produce pumping action in association with appropriate inlet and outlet valves. The bladder is configured to provide a stiffness characteristic which produces a recurring three lobe collapse pattern during pumping operation. Inlet and outlet passages to the bladder are associated with detachable seal rotatable fluid conduits in fluid-tight relationship to the bladder. The conduits are attachable and rotatable without transmitting torque to the flexible bladder.

Abstract: A housing of a pump for an artificial heart comprises central, polar regions of rigid material where a rotatable connector for control and/or power supply conduits is located. An equatorial, peripheral region is made of flexible material. Connectors for inlet and outlet conduits are tangentially mounted to the equatorial region. A flat, torus shaped bellows of elastic material is positioned between two oppositely driven, spring loaded pressure plates and encloses the pump volume. An electromechanical displacement transducer provides signals proportional to the stroke of the pump. The pump may be operated by a liquid or gaseous pressure medium and its shape and structure are well adapted for implantation into a living organism, especially the human body.

Abstract: Apparatus for accurately proportioning and mixing fluids comprising a double acting piston/cylinder unit of which the cylinder is divided into two chambers by the piston and the volume of the cylinder swept by the piston at one end of the piston is lesser than that at the other end. An inlet connection for a first fluid is made to one chamber, a conduit connects the two chambers and includes a connection to a source of the second fluid. Valve means are associated with the conduits and are effective to cause a charge of first fluid to be delivered to said one chamber and thereafter to be transferred to the other chamber drawing fluid from said source of second fluid to make up for the difference in the volumes of the chambers. Said valve means then cooperate to cause the mixed fluids to be discharged from the other chamber as said one chamber is again charged with said first fluid.

Abstract: 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 establish a pumping action through the bladder, in conjunction with check valves in the inlet and outlet to the bladder. Between the driver and the pump there is provided a pneumatic pulse limiter which includes a flexible diaphragm isolating the driver from the pump. Pulses from the driver are transmitted to the pump only through the flexible diaphragm and the diaphragm is constrained to move only within established limits. Regardless of the magnitude of the pulse from the driver, the maximum pulse applied to the pump cannot exceed that corresponding to the maximum displacement of the diaphragm.Between successive pulses, the portion of the system between the driver and the flexible diaphragm is depressurized.

Abstract: The invention provides a pump adapted inter alia for the intake and delivery of liquid such as water in wells or relatively deep bodies of water. The pump comprises a rigid-walled chamber, adapted to be immersed in the liquid to be sucked in. The rigid-walled chamber has an intake valve and a delivery valve interposed between the rigid-walled chamber and a delivery tube. The pump is characterized in that it comprises, accommodated in the rigid-walled chamber, a resiliently deformable chamber associated with means for controlling, at least in one direction, alternate deformations of the chamber by expansion and retraction.

Abstract: A combination primer and pump for internal combustion engines which utilizes a flexible cylindrical housing having a flexing liner with unidirectional valves at each end. The walls of the cylinder permit manual flexing or squeezing to pump fuel and a pulse connection in the outer housing connects the crankcase pulse of an engine being supplied with fuel to the inner, more flexible, liner to permit pumping action to take place when the engine is running. A pressure pulse passage between the outer and inner liner is positioned to be closed when the device is manually squeezed to achieve the priming function.

Abstract: A combination primer and pump for internal combustion engines which utilizes a flexible cylindrical housing having a flexing liner with unidirectional valves at each end. The walls of the cylinder permit manual flexing or squeezing to pump fuel and also a pulse connection in the outer housing serves as a valve to connect the crankcase pulse of an engine being supplied with fuel to the inner liner to permit pumping action to take place when the engine is running. The pulse connection may also serve as a control for the pulse pressure and thus for the fuel flow and pressure.

Abstract: There is described a respiration device designed to be associated to and operated with a respiration system including a source of pressurized gaseous mixture volumes which are to be cyclically and forcedly supplied into a patient's respiratory system, and a source of pulsing alternated positive and negative pressure. The device comprises an outer tubular component having inextensible walls and an inner hose having squashable walls, and inlet and outlet valves at either ends connected to the source of gaseous mixture and to a face mask or tracheal tube or the like, respectively, the source of pulsing pressure being connected to the interspace between said component and said hose, so that the latter acts a variable volume chamber for supplying one gaseous volume at any inhalation phase of the breathing cycle when the hose is squashed by the pressure applied thereabout in said interspace, the outlet valve being located very near to the patient.

Abstract: Disclosed is a pumping system using a pneumatically powered, submerged pump for lifting high viscosity oil from a well. The pump includes a flexible, bag-shaped expansible member or "bladder" mounted within a surrounding housing. Pressurized gas is supplied from the well surface to the bladder through a supply line. An inlet check valve permits oil in the formation to flow into the housing when the bladder is collapsed. When the bladder is expanded or displaced by the gas, the oil in the housing is displaced through an outlet check valve into a flow line which extends to the well surface. A submerged control valve channels gas into the bladder to control the bladder expansion. The control valve also functions to permit the gas in the bladder to flow into a vent tube to control bladder deflation.In a modified form of the invention, oil flowing into the housing expands the bladder and gas supplied to the housing collapses the bladder.

Abstract: 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 first main inlet tube, each branch tube being equipped with a flow-in side valve and a flow-out side valve with a flexible middle portion of the branch tubes which is expanded or contracted to provide a pulsatile pump with flow-out end of each branch tube connected to a second main tube with the second main tube of the inlet pump system being connected with the first main tube of the output pump and with the branch tubes of each system being ultimately expanded and contracted at different rates to provide a blood pump which achieves excellent hemodynamic effects without requiring synchronization with the rhythm of a natural heart.

Abstract: A device to be inserted in a blood vessel in order to aid the pumping of blood in only one direction within that vessel which comprises a gas inflatable and deflatable chamber mounted on support means and divided into an occluding section and a pumping section in direct communication with each other, such that it is necessary to deliver gas directly only to the occluding section, thereby enabling the occluding and pumping sections to be mounted on the support means in any order which further enables the device to be inserted from either above or below the vessel and which also permits thinner and therefore more easily insertable support means when the sections are mounted for insertion from below.