US 6,783,509 B1 · Single-use needle-less hypodermic jet injection apparatus and method

Abstract

A needleless injector system including: a first injector assembly; a gas capsule disposed within the first injector assembly and containing pressurized gas, with a pierceable surface at the forward end thereof to provide an injection source; a gas capsule piercing member disposed within the first injector assembly, where the piercing member and the gas capsule are movable relative to each other; a second injector assembly containing a medical treatment fluid and having a forward facing injection orifice for injecting the medical treatment fluid into a patient; and a resilient seal mounted between the gas capsule and the first injector assembly to contain all pressurized gas within a forward end of the first injector assembly after pressurized gas is released from the gas capsule following piercing of the gas capsule, in order to cause an immediate increase in pressure in the medical treatment fluid contained within the second injector assembly.

Claims6

Dependent claims

A needleless injector system comprising:

an injector body member defining an inner chamber and an injection orifice;
a gas capsule positioned within the body member chamber, the capsule having a penetrable wall at one end thereof;
a capsule piercing member facing and spaced from the penetrable wall;
a hammer member disposed in abutment with and affixed to the end of the capsule remote from the penetrable wall;
a biasing system for selectively imparting a biasing force against the hammer member and the capsule;
and
a locking system for maintaining the piercing member spaced from the penetrable wall until the hammer member and the capsule are biased toward the piercing member.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/661,135Filed 13 Sep 2000 · continuation in part

Priority

18 Nov 1998

Granted

31 Aug 2004

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

A61M 5/30
Syringes: syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
A61M 5/2053
Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically: media being expelled from…
A61M 5/2459
With sealing means to be broken or opened: upon internal pressure increase, e.g. pierced or burst
A61M 5/425
Having means for desensitising skin, for protruding skin to facilitate piercing, or for locating point where body is to be pierced: protruding…

Family

Application09/195,334Parent of this continuation-in-part · filed 18 Nov 1998

Application09/252,131Parent of this continuation · filed 18 Feb 1999

PCT/US00/03938Parent of this continuation-in-part · filed 16 Feb 2000

PCT/US00/03938Parent of this continuation

US 6,264,629 B1Parent of this continuation

Application09/252,131Parent of this continuation-in-part

US 6,096,002 AParent of this continuation-in-part

US 6,783,509 B1This patent

From the US filing history. Foreign family members aren’t listed.

Single-use needle-less hypodermic jet injection apparatus and method

Life of this patent

Single-use needle-less hypodermic jet injection apparatus and method

Life of this patent

Abstract

Claims6