Bunder Glas Gmbh

Manfred Theiling

Erhard Stohlmann

Andreas Geiger

The invention relates to a needle guard assembly for the needle part of a syringe body in the form of a needle guard that covers the needle and which is displaceable on the syringe body in the longitudinal direction, and with a grip plate being integrally formed on that end of the syringe body remote from the needle. The needle guard assembly includes a syringe body ending with a needle. A piston rod in the syringe body has a receiving part and a push-in part that telescopes into the receiving part. A syringe-body grip plate is integrally formed on the syringe body. The syringe-body grip plate opposes the needle. A needle guard is arranged longitudinally along the syringe body and covers the needle when the needle guard is displaced longitudinally.

Needle guard assembly for the needle of a syringe body

A hypodermic syringe consists of a syringe body (3) and a cylindrical ampoule (4) inserted therein, a Luer-Lock connection for a cannula (1) being provided on the syringe body (3), the Luer-Lock connection being constructed in two pieces, the connecting member (10) being fixed to the cylindrical ampoule (4) and the threaded sleeve (8) being fixed to the syringe body (3), the connecting member (10) having an axial connecting passage (13) to the interior of the cylindrical ampoule (4), which can be sealed by a removable sealing plug (7), and the cylindrical ampoule (4) being positionally fixed at one end with a conical surface (14) engaged in a tapered bore (8b) in the sleeve (8), and being secured at the other end against axial displacement in the syringe body (3) by means of a retaining collar (5) which can be removably fixed to the syringe body (3) and which acts through a bearing ring (21) against the end (4b), the improved syringe, as a prefilled disposable syringe, ensuring with easy handling a secure and tight attachment of the cannula to the Luer-Lock connection as a result of the two-piece construction of the Luer-Lock connection and guaranteeing a connection free from perforation and fragmentation.

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Bünde, Germany

Manfred Theiling