Needle protection devices
AssigneeOwen Mumford Limited
InventorJeremy Marshall
Life of this patent
Estimating the term…
Abstract
A syringe holder has a barrel (1) with a needle shroud (4) telescopic into its leading end and urged forwardly by a spring (5). The shroud is rotatable into several set positions, being located by snap action of a nib (18) into longitudinal grooves within a forward extension (3) of the barrel (1). An abutment (21,20) on the shroud is thereby aligned with a selected one of several abutments (12,9,14) within the barrel, these all being at different axial positions. One setting prevents needle exposure; the others permit different amounts of needle exposure as the barrel (1) is urged forwardly during an injection.
Claims10
A needle shroud assembly for a syringe holder, the assembly comprising a barrel (1) and a tubular needle shroud (4) captively telescoped into the forward end of the barrel (1), there being mutually facing abutments (9, 12, 14, 21) some of which are on the barrel, to limit the rearward telescopic movement of the shroud (4) by different amounts according to the relative positions of those abutments rotationally about the axis of the barrel, characterised in that the shroud is rotatable to bring an abutment (12) thereon into direct contact with a selected abutment (9, 14) on the barrel.
A needle shroud assembly as claimed in any preceding claim, characterised in that the barrel (1) has a set of forward facing internal abutments (9, 14, 12) at different circumferential and axial positions, the shroud (4) having a rearward facing abutment (21).
A needle shroud assembly as claimed in any preceding claim, characterised in that the barrel (1) has a main body with a reduced leading end (2) and an extension (3) that retentively telescopes over this leading end (2) and which is adapted to keep the shroud (4) captive.
A needle shroud assembly as claimed in any preceding claim, characterised in that the shroud (4) has a forward spring bias (5) to a limiting position where the needle of a syringe within the barrel (1) is concealed within the shroud (4).
Dependencies are inferred from the claim text.