Patent ID: 8905970

Claim:
A high pressure delivery system for delivering a medicament, comprising: a first chamber for storing a supply of the medicament; a second chamber in fluid communication with said first chamber; a fluid connection path in fluid communication with said second chamber for delivering the medicament to a high pressure area; and a valving system in fluid communication with said first and second chambers and said fluid connection path; wherein said valving system allows a dose of the medicament to be injected from said first chamber into said second chamber while substantially preventing backflow of the dose into said first chamber and substantially preventing leakage through said fluid connection path, and said valving system allows the dose in said second chamber to be administered through said fluid connection path while substantially preventing the dose from flowing back into said first chamber; wherein said valving system comprises a first check valve disposed between said first and second chambers and a second check valve disposed between said second chamber and said delivery means.