Resources Contact Us Home
Multiple pharmaceutical syringe

Image Number 15 for United States Patent #5199949.

A multiple pharmaceutical syringe (160), especially useful for use in dispensing insulin, includes a body (162) housing first and second pharmaceutical-filled cartridges (182, 184). The cartridges are of the type with a septum (190) at one end and a piston (224, 225) at the other end with the liquid pharmaceutical (226, 228) between the two. The body also defines an accumulator chamber (202) within which an accumulator piston (238) is slidably mounted. When the cartridges are mounted within the body, the septums are pierced by hollow spikes (188) which are connected to a flow path opening into the accumulator chamber. Check valves (230) are used at the distal ends of the spikes to prevent liquid flow back into the cartridges. Pressing on the cartridge pistons forces the liquids into the accumulator chamber. Once the desired amounts of both liquids are in the accumulator chamber, the needle assembly is mounted to the replaceable fluid path assembly which fluidly couples the needle to the accumulator chamber. The injection is given by driving the accumulators piston using the accumulator stem.

  Recently Added Patents
Acoustic echo cancellation
Use of emerging non-volatile memory elements with flash memory
Display module
Variety corn line LIC7382
Powder pulverising device
Electrical event detection device and method of detecting and classifying electrical power usage
Tree drain grate
  Randomly Featured Patents
Hybrid vehicle control apparatus
Method of making field-plate isolated CMOS devices
Cap sleeve for light waveguide cables
Entry into a low power mode upon application of power at a processing device
Hair dyeing agents containing indigo derivatives
Exhaust silencer
Method for transferring energy between suspended objects
Process of purifying xanthan gum using an alkaline protease and lysozyme
Variable torque valve actuator