Fluid pumping system and apparatus

• Main Authors: RABENAU; RICHARD, LISAK; STEPHEN P, KEHNE; TERRY B
• Format: Patent
• Language: English
• Published: 06.09.1994
• Edition: 5
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

A fluid pumping assembly for particular use in delivery of sterile fluid used in surgical procedures, includes a pump control structure to which a replaceable fluid pumping cartridge is connected and disconnected to provide convenient replacement and disposability of the cartridge. The pump cartridge is self-contained in that it includes a fluid pump which is adapted for automatic connection to a pump drive structure when the cartridge is inserted into the assembly, so that the sterile fluid is pumped only through the pumping cartridge and fluid flow is entirely isolated from the pump control structure to ensure that the fluid is maintained sterile during pumping. The cartridge can include a selectively activated pulsation control to enable discharging the fluid from the cartridge in either a continuous flow or pulsating flow of the fluid. The pump control structure can provide a pneumatic drive system which cycles pressurized air to drive the pump. A pneumatic control valve provides cycled switching of alternating air pressure and exhaust communication with the pump.