Patent ID: 7041081

Claim:
A continuous liquid infusion device, comprising: a first structure having a vacuum pump barrel which has an open/close valve at its front end and an open rear end, a piston fitted into the vacuum pump barrel air-tightly, a stopper capable of locking the piston at the rear end of the vacuum pump barrel against atmospheric pressure, and a pusher movable in the same direction as that of the piston outside the vacuum pump barrel; and a second structure having a liquid syringe which has a liquid port at its front end and an open rear end, and a piston fitted into the liquid syringe liquid-tightly, wherein said first structure and said second structure are removably connected, and said first structure and said second structure are connectable in a state in which the front end of the vacuum pump barrel of said first structure extends further forward than the front end of the liquid syringe.