Abstract: The injection syringe (10) includes, on the one hand, an elongate syringe body (12) comprising a tube (16) and a front wall (20) equipped with an injection needle (22), and, on the other hand, a rear actuating plunger (14) mounted so as to be displaceable inside the tube (16). The body (12) additionally has a mobile needle protector (36) which can be displaced, under the effect of the actuating plunger (14) driven into the body (12), between a retracted position, set back from the injection end (22A) of the needle (22), and an active protection position, in which the front end of the protector is situated in front of the injection end (22A) of the said needle (22).
Type:
Grant
Filed:
May 17, 2000
Date of Patent:
May 27, 2003
Assignee:
Societe d'Etudes et d'Applications Techniques-Sedat
Abstract: An injection syringe having a body (12) bearing an injection needle (14), a reservoir (16) containing a liquid (42) to be injected and being movable relative to the body (12) for causing the liquid to be injected to circulate through the needle (14), and a needle shield (18) movably mounted relative to the needle (14) for movement, under the control of a spring (20), from a retracted position towards an active protective position. The syringe has complementary parts (54, 62) which, when engaged, retain a first spring (20) end cooperating with the shield (18), and which, when disengaged by further movement of the reservoir (16), release the spring (20) first end to displace the shield (18) to its active protective position. The second spring (20) end is pressed against the reservoir (16) for gradually compressing the spring (20) during injection.
Abstract: An injection syringe (10) has an elongated syringe body (12) including a tube (18), a perforated front wall (26) for receiving an injection needle (70), and a rear actuating plunger (14) movably mounted inside the tube (18). A mobile needle shield (16) is externally movable along the syringe body (12) between a retracted position and an active position. An axial coupling mechanism (54) is provided between the shield (16) and the actuating plunger (14) for their simultaneous displacement towards the front on a common section. A release mechanism (58) is provided for releasing the coupling mechanism (54) to disengage the actuating plunger (14) and the needle shield (16) when the needle shield (16) is finally set in place.
Abstract: The injection syringe (10) includes, on the one hand, an elongate syringe body (12) comprising a tube (16) and a front wall (20) equipped with an injection needle (22), and, on the other hand, a rear actuating plunger (14) mounted so as to be displaceable inside the tube (16). The body (12) additionally has a mobile needle protector (36) which can be displaced, under the effect of the actuating plunger (14) driven into the body (12), between a retracted position, set back from the injection end (22A) of the needle (22), and an active protection position, in which the front end of the protector is situated in front of the injection end (22A) of the said needle (22).