Pre-filled injection delivery device
First Claim
1. A syringe comprising:
- a) a barrel having a liquid drug reservoir therein, the barrel having a first end and a second end;
b) a delivery needle mounted on the first end of the barrel;
c) a gas generator located at the second end of the barrel, the gas generator in communication with the reservoir when the gas generator is activated;
d) gas generation activation means; and
e) a sleeve moveably mounted on the first end of the barrel from a first position where the tip of the needle is concealed by the sleeve to a second position where the tip of the needle is exposed to a third gas generation activation position,f) whereby when the sleeve is initially pressed against an injection site, the sleeve moves from the first position to the second position, and the tip of the needle penetrates the injection site, and when the sleeve moves from the second position to the third position, it causes activation of the gas generator which drives a liquid from the reservoir into the injection site through the needle.
2 Assignments
0 Petitions
Accused Products
Abstract
A syringe (10) comprises a barrel (11) containing an internal cylindrical body (12) containing a liquid (14) and communicating with a delivery needle (15). The needle (15) is covered before use by a removable sheath (16), and after the sheath (16) is removed, the needle (15) is concealed by a displaceable sleeve (20). In use the sleeve (20) is pressed against the skin by applying pressure while holding the barrel (11). The sleeve (20) is thereby retracted into the barrel (11) allowing the needle (15) to penetrate the skin. The movement of the sleeve (20) also activates a gas generator (17) which expels the liquid (14) from the needle (15). When delivery is complete and the syringe (10) is taken from the skin, a coil spring (22) moves the sleeve (20) back to the starting position again concealing the needle (15). The coil spring (22) is torsionally biased before use and causes a rotational movement of the sleeve (20) relative to the barrel (11) when the sleeve (20) moves into and out of the barrel (11). This rotational movement engages a locking mechanism which prevents further movement of the sleeve (20) and thereby permanently conceals the needle (15).
467 Citations
30 Claims
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1. A syringe comprising:
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a) a barrel having a liquid drug reservoir therein, the barrel having a first end and a second end; b) a delivery needle mounted on the first end of the barrel; c) a gas generator located at the second end of the barrel, the gas generator in communication with the reservoir when the gas generator is activated; d) gas generation activation means; and e) a sleeve moveably mounted on the first end of the barrel from a first position where the tip of the needle is concealed by the sleeve to a second position where the tip of the needle is exposed to a third gas generation activation position, f) whereby when the sleeve is initially pressed against an injection site, the sleeve moves from the first position to the second position, and the tip of the needle penetrates the injection site, and when the sleeve moves from the second position to the third position, it causes activation of the gas generator which drives a liquid from the reservoir into the injection site through the needle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of injecting liquid drug comprising the following steps:
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a) providing a barrel having a liquid drug reservoir therein, a delivery needle mounted on the first end of the barrel, b) locating a gas generator at the second end of the barrel, the gas generator in communication with the reservoir when the gas generator is activated; c) moveably mounting a sleeve within the first end of the barrel, the sleeve capable of assuming a first position where the tip of the needle is concealed by the sleeve, a second position where the tip of the needle is revealed, and a third gas generator activation position; d) placing the sleeve against an injection site; e) moving the barrel toward the injection site, thereby causing the sleeve to move from the first position to the second position and the tip of the needle to penetrate the injection site; and f) moving the sleeve to the third position to activate the gas generator thereby driving a liquid from the reservoir into the injection site through the needle. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A syringe comprising:
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a member having a liquid drug reservoir therein, the member having a first end and a second end; a delivery needle mounted on the first end of the member; a gas generator located at the second end of he member, the gas generator in communication with the reservoir when the gas generator is activated; and a sleeve moveably mounted on the first end of the member from a first position where the tip of the needle is enclosed by the sleeve, to a second position where the tip of the needle is exposed, to a third position where the sleeve activates the gas generator, whereby when the sleeve is initially pressed against an injection site, the sleeve moves from the first position to the second position, and the tip of the needle penetrates the injection site, and when the sleeve moves from the second position to the third position, it causes activation of the gas generator which drives a liquid from the reservoir into the injection site through the needle.
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30. A method of injecting liquid drug comprising the following steps:
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a) providing a member having a liquid drug reservoir therein, a delivery needle mounted on the first end of the member, b) locating a gas generator at the second end of the member, the gas generator in communication with the reservoir when the gas generator is activated; c) moveably mounting a sleeve within the first end of the member, the sleeve capable of assuming a first position where the tip of the needle is concealed by the sleeve, a second position where the tip of the needle is revealed, and a third position where the gas generator is activated; d) pressing the sleeve against an injection site, thereby causing the sleeve to move from the first position to the second position and the tip of the needle to penetrate the injection site; and e) moving the sleeve to the third position to activate the gas generator, thereby driving the liquid from the reservoir into the injection site through the needle.
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Specification