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Methods and apparatuses for joining a pumping cartridge to a pump drive

  • US 8,851,866 B2
  • Filed: 03/03/2008
  • Issued: 10/07/2014
  • Est. Priority Date: 04/27/2001
  • Status: Active Grant
First Claim
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1. A reusable pump drive system, the system comprising:

  • a pump cartridge having a piston assembly and a cylinder assembly,the piston assembly comprising a connecting region and a body region, the connecting region of the piston assembly comprising a piston shaft, the body region of the piston assembly comprising a body having a side wall, a check valve,a fluid inlet extending from outside the cylinder assembly through the side wall of the body to the check valve for introducing a fluid into the pump cartridge,a piston having a sealing flange, andan annular groove in an outer surface of the cylinder assembly,a drive shaft adapter having an inner radial cavity to receive a portion of the piston shaft, a first end portion, a second end portion and one or more piston shaft retaining components,a fixed guide member having an inner radial passage extending therethrough, anda pump cartridge cylinder retaining component having a distal engagement pin with an inner end sized and positionable to engage the annular groove on the cylinder assembly,wherein in a first position the pump cartridge cylinder retaining component retains the cylinder assembly in the inner radial passage and in a second position the pump cartridge cylinder retaining component allows insertion of the cylinder assembly into the inner radial passage or removal of the cylinder assembly from the inner radial passage.

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