Medical device

Details Medical device Medical device

2006-09-12

2006-09-12

Bennett, Henry (Department: 3743)

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

C604S131000, C604S191000, C604S068000, C604S082000

Reexamination Certificate

active

07104971

ABSTRACT:
The invention relates to an injector device for delivery of liquid from a high pressure source, and also to a method of performing such an injection. The device comprises a storage chamber6, for the liquid or the liquid precursor components, comprising a storage barrel16with at least a section of substantially constant cross-section, defining a storage chamber axis, and a pressure chamber4comprising a pressure barrel10of substantially constant cross-section, defining a pressure chamber axis, for accommodation of at least one piston therein and having a front end opening14for ejection of the liquid. The pressure chamber being of sufficient strength to sustain the liquid pressure. The chambers are separate parts and adapted to cooperate with each other during injection so that the pressure chamber axis and the storage chamber axis substantially coincide, and that the pressure barrel and storage barrel have internal diameters sufficiently similar to allow passage of a resilient piston from the storage barrel to the pressure barrel in a sealing manner. The liquid is transferred from the storage chamber directly into the delivery chamber when the jet injection is to be performed.

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