초록 ▼

A first cylindrically shaped part surrounds and is fixed to the needle base which is mounted on the forward end of the syringe body. A second cylindrical part is mounted within the first part for axial movement between a forward position where the needle is surrounded for protection of the needle pr

A first cylindrically shaped part surrounds and is fixed to the needle base which is mounted on the forward end of the syringe body. A second cylindrical part is mounted within the first part for axial movement between a forward position where the needle is surrounded for protection of the needle prior to mounting and between injections and a position in which the needle is exposed during an injection. A spring urges the second part towards the forward position. Locking elements are provided for permanently locking the second part in a third, axially spaced position to protect the needle after it has been discarded. Prior to and between injections, the second part may be non-permanently locked in the forward position by rotating it relative to the first part.

대표청구항 ▼

A needle guard for use with a syringe of the type having a cylindrical body with an axis and a needle extending from and fixably mounted on the forward end thereof, said guard comprising a first part adapted to be non-moveably mounted on said body, a second part mounted for movement relative to said

A needle guard for use with a syringe of the type having a cylindrical body with an axis and a needle extending from and fixably mounted on the forward end thereof, said guard comprising a first part adapted to be non-moveably mounted on said body, a second part mounted for movement relative to said first part between a first axial position wherein the needle tip is unexposed and wherein said second part can be moved circumfrentially to a non-permanently locked position, a second axial position wherein the needle tip is exposed and a third axial position wherein the needle tip is unexposed, means for urging said second part towards said first axial position and means for permanently locking said second part in said third axial position, said locking means comprising resilient means having a portion normally extending radially from said second part and a recess on said first part adapted to receive said radially extending portion in a non-releasable fashion when said second part is in said third axial position.