Auto-injection device
First Claim
1. An auto-injection device comprising:
- a barrel having a wall with an external surface and defining therein an internal cavity having a longitudinal axis, said barrel having a front end for placement against a patient'"'"'s skin and a rear end, said wall having a trigger access therethrough;
a driver shiftably received in said cavity for movement between a forward, uncocked position and a rearward, cocked position and adapted to engage a syringe for longitudinally shiftable movement of the drive and syringe within said barrel, said driver including a catch positioned more proximate said rear end than said front end of said barrel;
a release carried by said barrel, said release including a resilient member positioned within said cavity and a trigger projecting through said trigger access and biased by said resilient member to a first position on the exterior surface of the barrel adjacent said trigger access, said release being located within said cavity for retaining said catch when said driver is shifted into said cocked position, said trigger including a projection extending axially therefrom and opposing said exterior surface of said barrel and requiring shifting across said exterior surface about said axis and against said resilient member prior to depression of said trigger toward said axis and into said trigger access to shift the release out of engagement with the catch and permit movement of the driver forwardly to the uncocked position.
1 Assignment
0 Petitions
Accused Products
Abstract
An auto-injection device is provided for mounting a standard medical syringe which enables the user to automatically inject the contents of the syringe to a desired penetration depth. The auto-injection device includes a barrel sized for receiving the syringe therein, a driver shiftably received in the barrel for moving the syringe and causing injection of its contents, and a trigger accessible from outside the syringe, the trigger requiring movement across the exterior surface of the barrel prior to depression for releasing the plunger as a safety against inadvertent needle exposure and discharge. The barrel may include a window for enabling the user to ascertain whether the device is cocked or not. The barrel may be provided in two separate sections with one of the sections receivable into the other to permit cocking. The barrel also may include a slot for receiving a button to permit exposure of the needle to remove a protective cap when the device is cocked and the syringe is withdrawn into the barrel.
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Citations
20 Claims
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1. An auto-injection device comprising:
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a barrel having a wall with an external surface and defining therein an internal cavity having a longitudinal axis, said barrel having a front end for placement against a patient'"'"'s skin and a rear end, said wall having a trigger access therethrough;
a driver shiftably received in said cavity for movement between a forward, uncocked position and a rearward, cocked position and adapted to engage a syringe for longitudinally shiftable movement of the drive and syringe within said barrel, said driver including a catch positioned more proximate said rear end than said front end of said barrel;
a release carried by said barrel, said release including a resilient member positioned within said cavity and a trigger projecting through said trigger access and biased by said resilient member to a first position on the exterior surface of the barrel adjacent said trigger access, said release being located within said cavity for retaining said catch when said driver is shifted into said cocked position, said trigger including a projection extending axially therefrom and opposing said exterior surface of said barrel and requiring shifting across said exterior surface about said axis and against said resilient member prior to depression of said trigger toward said axis and into said trigger access to shift the release out of engagement with the catch and permit movement of the driver forwardly to the uncocked position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. In combination:
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a syringe having an elongated tube having an open end and a needle mount at the other end, a needle mounted on the needle mount, and a plunger received in the open end and projecting therefrom, said plunger including a stopper, a thumbrest, and a shaft extending between the stopper and the thumbrest; and
an injector mounting said syringe for shiftable movement therein between an uncocked position with the needle of the syringe extending beyond the injector and a cocked position with the needle received within the injector, said injector including;
a barrel having a wall with an external surface and defining therein an internal cavity having a longitudinal axis and complementally sized for receiving said syringe therein, said barrel having a front end for placement against a patient'"'"'s skin and a rear end, said wall having a trigger access therethrough;
a driver operatively coupled with said syringe and shiftably received in said cavity for movement between a forward, uncocked position with said needle projecting forwardly of said front end and a rearward, cocked position with said needle withdrawn into said cavity, said driver including a catch positioned more proximate to said rear end than said front end of said barrel;
a release carried by said barrel, said release including a resilient member positioned within said cavity and a trigger projecting through said trigger access and biased by said resilient member to a first position on the exterior surface of the barrel adjacent said trigger access, said release being located within said cavity for retaining said catch when said driver shifted into said cocked position, said trigger including structure opposing said exterior surface of said barrel and requiring shifting across said exterior surface about said axis and against said resilient member prior to depression of said trigger toward said axis and into said trigger access to shift the release out of engagement with the catch and permit movement of the driver forwardly to the uncocked position. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification