Injection device
First Claim
1. An injection device for automatic injection of at least one injection liquid, said device having a front and comprising an assembly of a discharge mechanism, a cartridge holder and a cartridge slidably accommodated in the cartridge holder;
- the discharge mechanism comprising an outer sleeve that is open at one end, a plunger that is movable in the sleeve, a coil spring that acts on said plunger to move said plunger towards the open end of the sleeve, and a locking means that cooperates with said plunger to prevent undesired movement of the plunger;
the cartridge holder being slidably adapted within said outer sleeve to allow restricted backward telescopic movement relative thereto, thereby moving the locking means out of its retaining engagement with said plunger;
the cartridge comprising;
(a) a glass ampoule comprising a front and an end opposite the front, said front of said ampoule being proximate the front of said device, said glass ampoule having an injection needle connected to the front thereof and being open-ended at the opposite end thereof, a portion of said ampoule remote from the needle comprising a hollow cylinder having an at least substantially uniform inside diameter,(b) a piston adapted for movement by the plunger sealingly provided in said cylinder,(c) at least one injection liquid provided in said ampoule between the piston and a sealing member at a front of the cartridge, and(d) a needle sheath covering the needle to keep the needle in a sterile condition prior to use of the device;
wherein a protective cover is provided on the front of the device, said cover covering front portions of the cartridge holder and the outer sleeve in such a manner that unintentional backward movement of the cartridge holder in the outer sleeve is prevented.
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Accused Products
Abstract
The present invention relates to an injection device for the automatic injection of at least one injection liquid, comprising an assembly of a discharge mechanism, a cartridge holder and a cartridge slidably accommodated in the cartridge holder, the discharge mechanism comprising an outer sleeve wherein the cartridge holder is slidably adapted. A protective cover is provided on the front of the device, covering the front portions of the cartridge holder and the outer sleeve in such a manner, that unintentional backward movement of the cartridge holder in the outer sleeve, resulting in activation of the device, is prevented.
110 Citations
20 Claims
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1. An injection device for automatic injection of at least one injection liquid, said device having a front and comprising an assembly of a discharge mechanism, a cartridge holder and a cartridge slidably accommodated in the cartridge holder;
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the discharge mechanism comprising an outer sleeve that is open at one end, a plunger that is movable in the sleeve, a coil spring that acts on said plunger to move said plunger towards the open end of the sleeve, and a locking means that cooperates with said plunger to prevent undesired movement of the plunger; the cartridge holder being slidably adapted within said outer sleeve to allow restricted backward telescopic movement relative thereto, thereby moving the locking means out of its retaining engagement with said plunger; the cartridge comprising; (a) a glass ampoule comprising a front and an end opposite the front, said front of said ampoule being proximate the front of said device, said glass ampoule having an injection needle connected to the front thereof and being open-ended at the opposite end thereof, a portion of said ampoule remote from the needle comprising a hollow cylinder having an at least substantially uniform inside diameter, (b) a piston adapted for movement by the plunger sealingly provided in said cylinder, (c) at least one injection liquid provided in said ampoule between the piston and a sealing member at a front of the cartridge, and (d) a needle sheath covering the needle to keep the needle in a sterile condition prior to use of the device; wherein a protective cover is provided on the front of the device, said cover covering front portions of the cartridge holder and the outer sleeve in such a manner that unintentional backward movement of the cartridge holder in the outer sleeve is prevented. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification