Needle-less injection system
First Claim
1. A needle-less hypodermic jet injection system including a hand-held injection unit and a separate energizing unit, said hand-held injection unit being configured for administering a liquid medication in the form of a hypodermic jet injection, said injection system comprising:
- a hand-held injection unit including means for mounting thereto an injection cartridge with medication cylinder, injection nozzle, and injection piston;
said hand-held injection unit also including an injection ram for driving said injection piston, a power unit which is pre-energized prior to each injection to store injection energy to be applied to the injection ram; and
a trigger mechanism allowing the energy stored in the power unit to be released and applied in driving the injection ram to cause the medication to be ejected via said injection nozzle forming the hypodermic injection jet;
said trigger mechanism including an outer trigger sleeve outwardly adapted to be manually grasped and movable axially along a portion of said hand-held injection unit, and forward movement of said outer trigger sleeve being effective to release the energy stored in the power unit; and
a separate energizing unit with which the hand-held injection unit interfaces to be energized to store injection energy so as to subsequently power an injection;
wherein said outer trigger sleeve outwardly carries a pair of diametrically opposed trigger members, each of said diametrically opposed trigger members extending outwardly relative to said hand-held injection unit, and said trigger members providing manual purchase for effecting forward movement of said outer trigger sleeve to release the energy stored in said power unit; and
wherein one of said pair of diametrically opposed trigger members pivotally carrying a release member, and said release member being pivotal between a first position interposing a safety member between said trigger sleeve and a stop member, and said safety member in a second position withdrawing said safety member from interposition between said trigger sleeve and said stop member to allow said trigger sleeve to be manually moved forward along said hand-held injection unit.
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Accused Products
Abstract
A needle-less hypodermic jet injection system includes a hand-held injector, and an energizing or cocking unit for use with the injector to prepare it for administering an injection. The hand-held unit includes a cartridge which provides a cylinder of liquid medication to be injected, an injection orifice, and an injection piston forceful movement of which causes an injection jet of medication to be expelled from the orifice. A power unit of the injector provides for forceful movement of the injection piston when a trigger is actuated. After being used to effect an injection, the injector is interfaced with an energizer unit which cocks the power unit preparatory to the next injection.
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Citations
23 Claims
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1. A needle-less hypodermic jet injection system including a hand-held injection unit and a separate energizing unit, said hand-held injection unit being configured for administering a liquid medication in the form of a hypodermic jet injection, said injection system comprising:
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a hand-held injection unit including means for mounting thereto an injection cartridge with medication cylinder, injection nozzle, and injection piston;
said hand-held injection unit also including an injection ram for driving said injection piston, a power unit which is pre-energized prior to each injection to store injection energy to be applied to the injection ram; and
a trigger mechanism allowing the energy stored in the power unit to be released and applied in driving the injection ram to cause the medication to be ejected via said injection nozzle forming the hypodermic injection jet;
said trigger mechanism including an outer trigger sleeve outwardly adapted to be manually grasped and movable axially along a portion of said hand-held injection unit, and forward movement of said outer trigger sleeve being effective to release the energy stored in the power unit; and
a separate energizing unit with which the hand-held injection unit interfaces to be energized to store injection energy so as to subsequently power an injection;
wherein said outer trigger sleeve outwardly carries a pair of diametrically opposed trigger members, each of said diametrically opposed trigger members extending outwardly relative to said hand-held injection unit, and said trigger members providing manual purchase for effecting forward movement of said outer trigger sleeve to release the energy stored in said power unit; and
wherein one of said pair of diametrically opposed trigger members pivotally carrying a release member, and said release member being pivotal between a first position interposing a safety member between said trigger sleeve and a stop member, and said safety member in a second position withdrawing said safety member from interposition between said trigger sleeve and said stop member to allow said trigger sleeve to be manually moved forward along said hand-held injection unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A needle-less hypodermic jet injection system including an energizing unit, and a separate hand-held injection unit, said hand-held injection unit being for use with an injection cartridge having a cylinder for receiving liquid medication, an orifice for forming the liquid into a high-velocity hypodermic injection jet, and an injection piston sealingly movable in said cylinder to displace said liquid medication via said orifice;
- said needle-less injection system comprising;
a hand-held injection unit including an injection ram abutting with said injection piston of said injection cartridge to forcefully drive the latter to form an injection jet of liquid medication held in said cylinder of said cartridge, said hand-held injection unit including a power unit which is energized prior to each injection; and
a trigger mechanism allowing the energy stored in the power unit to be released and applied in driving the injection ram to cause the formation of said hypodermic injection jet;
said trigger mechanism including an outer trigger sleeve outwardly adapted to be manually grasped and movable axially along a portion of said hand-held injection unit, and forward movement of said outer trigger sleeve being effective to release the energy stored in the power unit; and
a separate energizing unit with which the hand-held injection unit interfaces prior to each injection to be energized by the application of mechanical force and displacement acting over a distance to store energy in said power unit with which to power an injection;
wherein said outer trigger sleeve outwardly carries a pair of diametrically opposed trigger members, each of said diametrically opposed trigger members extending outwardly relative to said hand-held injection unit, and said trigger members providing manual purchase for effecting forward movement of said outer trigger sleeve to release the energy stored in said power unit; and
wherein one of said pair of diametrically opposed trigger members pivotally carrying a release member, and said release member being pivotal between a first position interposing a safety member between said trigger sleeve and a stop member, and said safety member in a second position withdrawing said safety member from interposition between said trigger sleeve and said stop member to allow said trigger sleeve to be manually moved forward along said hand-held injection unit. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
- said needle-less injection system comprising;
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20. A method of effecting a needle-less hypodermic jet injection using an injection cartridge having a cylinder for receiving liquid medication, an orifice for forming the liquid into a high-velocity hypodermic injection jet, and an injection piston movable sealingly in said cylinder to displace said liquid medication via said orifice;
- said method including steps of;
providing a hand-held injection unit including an injection ram engageable with said injection piston of said injection cartridge to forcefully drive the latter to form an injection jet of liquid medication held in said cylinder of said cartridge, configuring said hand-held injection unit to include a power unit which is energized with mechanical energy prior to each injection; and
a trigger mechanism allowing the energy stored in the power unit to be released and applied in driving the injection ram to cause the formation of said hypodermic injection jet;
providing said trigger mechanism to include an outer trigger sleeve, outwardly adapting the trigger sleeve to be manually grasped and movable axially along a portion of the hand-held injection unit, and providing for forward movement of the outer trigger sleeve to be effective to release the energy stored in the power unit; and
utilizing a separate energizing unit to interface with the hand-held injection unit prior to each injection in order to re-energize the hand-held injection unit by the application of mechanical power to store energy in said power unit;
further including the steps of providing the outer trigger sleeve with a pair of diametrically opposed trigger members, extending each of the diametrically opposed trigger members outwardly on the trigger sleeve relative to the hand-held injection unit, and providing for the pair of trigger members to provide manual purchase for effecting forward movement of the outer trigger sleeve to release the energy stored in the power unit; and
further including the steps of providing for one of the pair of diametrically opposed trigger members to pivotally carry a release member, providing the release member to be pivotal between a first position interposing a safety member between the trigger sleeve and a stop member to prevent forward movement of the trigger sleeve, and providing for the safety member to in a second position withdraw the safety member from interposition between the trigger sleeve and the stop member allowing the trigger sleeve to be manually moved forward along the hand-held injection unit. - View Dependent Claims (21, 22, 23)
- said method including steps of;
Specification