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
Polypeptides and immunizing compositions containing gram positive polypeptides and methods of use
Key management using quasi out of band authentication architecture
Method and apparatus for transmitting and receiving a signal in a communication system
Electronic document reading devices
Cryptography on a simplified elliptical curve
Multi-protocol data transfers
Ventilated vacuum commutation structure
  Randomly Featured Patents
Gas spring with filler block
Method and device for manufacturing a metal strip by means of continuous casting and rolling
Device for positioning components within endoscopic systems
Insulating gasket means for supporting a cable in a housing opening
Bag making and packaging machine
Mapping a surface of a workpiece
Hysteresis comparing device with constant hysteresis width
Motor vehicle driver assisting method near the stability limit
Process for preparing silica-alumina
Input method for programming industrial controllers