Disposable injection device
First Claim
1. An injection device, comprising;
- a housing having a first end defining a first opening;
a plunger received within the first opening of the housing to move between first and second positions;
a cartridge disposed in the housing and having an interior serving as a reservoir for a drug;
a delivery needle disposed within the housing and in fluid communication with the reservoir via an interruptible fluid channel;
a locking mechanism disposed in the housing, said locking mechanism including a first resilient member having a relaxed position towards a center of the first opening;
a latch configured for holding the first resilient member clear of the first opening to enable the delivery needle to be placed into an injection position; and
a needle hub carrying the delivery needle,wherein, in the first position of the plunger, the delivery needle is enclosed by the plunger, wherein, in the second position of the plunger, the latch is released by the needle hub with the first resilient member resting against a side of the needle hub while the delivery needle is in the injection position, and, wherein when the plunger returns to the first position from the second position, the locking mechanism prevents the needle from being placed in the injection position.
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Accused Products
Abstract
An injection device is provided. The device includes a housing having a first end defining a first opening. A plunger is received within the first opening of the housing to move between first and second positions. A cartridge is disposed in the housing and has an interior serving as a reservoir for a drug. A delivery needle is disposed within the housing and is in fluid communication with the reservoir via an interruptible fluid channel. A locking mechanism is disposed in the housing. In the first position of the plunger the delivery needle is enclosed by the plunger and in the second position of the plunger the delivery needle is placed in an injection position and the plunger activates the locking mechanism whereby when the plunger returns to the first position the .locking mechanism prevents the needle from being placed in the injection position.
111 Citations
19 Claims
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1. An injection device, comprising;
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a housing having a first end defining a first opening; a plunger received within the first opening of the housing to move between first and second positions; a cartridge disposed in the housing and having an interior serving as a reservoir for a drug; a delivery needle disposed within the housing and in fluid communication with the reservoir via an interruptible fluid channel; a locking mechanism disposed in the housing, said locking mechanism including a first resilient member having a relaxed position towards a center of the first opening; a latch configured for holding the first resilient member clear of the first opening to enable the delivery needle to be placed into an injection position; and a needle hub carrying the delivery needle, wherein, in the first position of the plunger, the delivery needle is enclosed by the plunger, wherein, in the second position of the plunger, the latch is released by the needle hub with the first resilient member resting against a side of the needle hub while the delivery needle is in the injection position, and, wherein when the plunger returns to the first position from the second position, the locking mechanism prevents the needle from being placed in the injection position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A medical device, comprising:
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a housing extending along a longitudinal axis having a first end defining a first opening; a plunger received within the first opening of the housing to move between first and second positions; a needle a needle carrier, the needle being attached to the needle carrier; and a locking mechanism disposed in the housing, said locking mechanism including a first resilient member having a relaxed position towards a center of the first opening, wherein, in the first position of the plunger, the needle is enclosed by the plunger, wherein, in the second position of the plunger, the first resilient member being displaced from the relaxed position so as to allow the needle to be in an exposed position, and, wherein, when the plunger returns to the first position from the second position, the first resilient member moves about an axis parallel to said longitudinal axis towards the relaxed position in between the first opening and portions of the needle carrier such that the first resilient member inhibits movement of the plunger to the second position whereby the locking mechanism prevents the needle from being placed in the exposed position. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification