Disposable injection device
First Claim
1. A bolus injection device, comprising:
- a housing having a first end defining a first opening;
a plunger being slidably received within the first opening of the housing to move between first and second positions, the plunger having a bottom surface adapted to be brought into contact with the skin of a subject and a prong disposed on the plunger extending into the housing at least when the plunger is in the first position, and the plunger at least partially extending out of the first opening at least when the plunger is in the first position;
a resilient member biasing the plunger into its first position;
a cartridge disposed in the housing and having an interior serving as a reservoir for a drug, the cartridge being moveable between first and second positions; and
a delivery needle disposed on a needle carrier wherein the needle carrier is disposed within and fixedly and non-movably attached to the housing, the needle carrier arranged in the first opening of the housing, wherein the cartridge is moveable relative to the delivery needle with the delivery needle being in fluid communication with the reservoir when the cartridge is in its second position and the delivery needle not being in fluid communication with the reservoir when the cartridge is in its first position,wherein the plunger is moved against the force of the resilient member to its second position to expose the delivery needle to the skin of the subject and to actuate movement of the cartridge from its first position to its second position.
1 Assignment
0 Petitions
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.
-
Citations
32 Claims
-
1. A bolus injection device, comprising:
-
a housing having a first end defining a first opening; a plunger being slidably received within the first opening of the housing to move between first and second positions, the plunger having a bottom surface adapted to be brought into contact with the skin of a subject and a prong disposed on the plunger extending into the housing at least when the plunger is in the first position, and the plunger at least partially extending out of the first opening at least when the plunger is in the first position; a resilient member biasing the plunger into its first position; a cartridge disposed in the housing and having an interior serving as a reservoir for a drug, the cartridge being moveable between first and second positions; and a delivery needle disposed on a needle carrier wherein the needle carrier is disposed within and fixedly and non-movably attached to the housing, the needle carrier arranged in the first opening of the housing, wherein the cartridge is moveable relative to the delivery needle with the delivery needle being in fluid communication with the reservoir when the cartridge is in its second position and the delivery needle not being in fluid communication with the reservoir when the cartridge is in its first position, wherein the plunger is moved against the force of the resilient member to its second position to expose the delivery needle to the skin of the subject and to actuate movement of the cartridge from its first position to its second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A bolus injection device, comprising:
-
a housing having a first end defining a first opening; a plunger being slidably received within the first opening of the housing to move between first and second positions, the plunger having a bottom surface adapted to be brought into contact with the skin of a subject and a prong disposed on the plunger, the prong extending into the housing at least when the plunger is in the first position, the plunger at least partially extending out of the first opening; a resilient member biasing the plunger into its first position; a cartridge having a stopper, the cartridge disposed in the housing and having an interior serving as a reservoir for a drug and the stopper serving as a closure, the cartridge being moveable between first and second positions; and a delivery needle having an insertable length of 0.5 mm-2 mm, and a diameter corresponding to about 30 to 34 gauge, wherein said needle is disposed on a needle carrier wherein the needle carrier is disposed within and fixedly and non-movably attached to the housing, the needle carrier arranged in the first opening of the housing, wherein the cartridge is movable relative to the delivery needle with the delivery needle being in fluid communication with the reservoir by penetration of the stopper by an access needle at least when the cartridge is in its second position, wherein the plunger is moved against the force of the resilient member to its second position to expose the delivery needle to the skin of the subject and to actuate movement of the cartridge from its first position to its second position, wherein the resilient member has a biasing force sufficient to overcome both the frictional effects of the stopper to cartridge interaction and the backpressure of the fluid flow through the delivery needle. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
-
Specification