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US 8,523,807 B2Granted
Airless mixing with a by-pass syringe
AssigneeDuoject Medical Systems Inc.
InventorsDavid L. Reynolds, Daniel MacDonald, Roger McCarthy
Life of this patent
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Abstract
A transfer and mixing device which utilizes a by-pass cartridge and a syringe. After mixing the dry component and the diluent in the by-pass cartridge, the mixture can be passed to a syringe which includes a syringe plunger having a fluid passageway therein with a hydrophobic membrane covering the passageway. The mixture can be transferred back and forth between the by-pass cartridge and the syringe through a small bore to achieve mixing, particularly in the case of microspheres held in suspension.
Claims17
A transfer and mixing device comprising:
- an outer housing;
- a by-pass cartridge having a by-pass formed therein, said by-pass cartridge being mounted within said outer housing;
- a septum located at a front end of said by-pass cartridge;
- a first plunger located at a rear end of said by-pass cartridge;
- a second plunger located intermediate said septum and said first plunger, said second plunger being located rearwardly of said by-pass;
- a syringe socket at a front end of said outer housing, said syringe socket including a piercing member extending inwardly towards said septum;
- a syringe securable to said syringe socket;
- a syringe plunger mounted in said syringe, said syringe plunger having a fluid passageway therein, a hydrophobic membrane covering said passageway, said passageway thereby permitting the passage of gas therethrough;
- and
- a plunger rod.
7 more elements
Dependencies are inferred from the claim text.