Needle-free injection system
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United States of America Patent
Stats
-
Dec 21, 2010
Grant Date -
Mar 18, 2010
app pub date -
Nov 23, 2009
filing date -
May 28, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A needle-free injection device in which a gas cartridge or other source of pressurized gas is used to advance a piston and forcibly expel injectable fluid out through an injection orifice. When a gas cartridge is used, the gas cartridge may be moveable from an initial position to an actuating position in which gas is released to drive the injection, and a recoil inhibitor may be employed to prevent the gas cartridge from moving back to the initial position. A gas cartridge seal may be disposed on the gas cartridge and moveable with the gas cartridge to seal the gas cartridge against an interior wall of a gas cartridge housing. The needle-free injection device may also be configured so that sealing is compromised upon full advancement of the piston, so as to de-pressurize the device after delivery of an injection.
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