STYLET HANDLE ATTACHMENT DEVICE WHERE THE ENGAGEMENT PORTIONS OF THE NEEDLE HUB AND STYLET HANDLE FORM A POSITIVE LOCK THAT RESTRICTS THE ENGAGEMENT PORTIONS FROM SEPARATING IN A LONGITUDINAL DIRECTION

摘要

585525 A hub assembly 1, comprising a needle hub 4 having a proximal end and a distal end 9 and with a cannula 22 extending through it and protruding from the distal end 9, and a stylet handle 10 having a stylet extending from it with the stylet adapted to be received within a portion of the cannula 22. The needle hub 4 has a first engagement portion 16. The stylet handle 10 has a second engagement portion. Engagement of the first engagement portion 16 of the needle hub 4 and the second engagement portion of the stylet handle 10 form a positive lock, which restricts the first engagement portion 16 from separating from the second engagement portion in the longitudinal direction. The first engagement portion 16 is a recess and the second engagement portion is a protrusion for releasable receipt within the recess. The recess further comprises a shoulder. The protrusion further comprises a restraining end engageable with the shoulder when the needle hub 4 and stylet handle 10 form a positive lock.