Tamper resistant syringe cap
AssigneeB. Braun Medical Inc.
InventorKenneth Raines
Life of this patent
Estimating the term…
Abstract
A tamper-resistant closure for a medical injection device such as a syringe includes a cap having both a blind bore sized to receive and seat tightly against the syringe tip, to prevent material from entering or being withdrawn from the device. The cap has a threaded connection to the syringe tip, and is entirely covered by a loose-fitting shield having a one-way drive mechanism which prevents the cap from being unscrewed from the device while the shield is in place. The shield has at least one internal, frangible tang protruding obliquely into the envelope of the cap, so that the shield and cap can be easily assembled, but cannot thereafter be disassembled without breaking the tang and thus providing an indication of tampering.
Claims13
A tamper-resistant closure for a medical injection device having a protruding outlet and a first threaded connector, said closure comprising
- a cap having both a blind bore sized to receive and seat tightly against said outlet, to prevent material from entering or being withdrawn from the injection device, and a threaded portion for mating with said first threaded connector, so that the cap can be screwed onto the injection device by turning the cap in a predetermined direction relative to the injection device, and
- a shield entirely enveloping the cap, and having a loose fit thereon that cannot unscrew the cap, so that the cap cannot be removed from the injection device while the shield is in place, said shield having an internal surface and at least one internal, frangible tang protruding therefrom diagonally toward the cap and diagonally away from the injection device, so that the shield can be pressed onto the cap once the cap has been installed on the injection device, but cannot thereafter be pulled off without breaking the tang and thus providing an indication of tampering, said cap further having a protrusion for engaging said tang.
Dependencies are inferred from the claim text.