20090281491 | INJECTION SYRINGE WITH AUTOMATICALLY RETRACTABLE NEEDLE - An injection syringe comprises a tubular housing, a hollow plunger disposed for reciprocating displacements, partly in the housing, between an advanced and a retracted position, an elongated retraction member arranged for being moved from an advanced to a retracted position in relation to the plunger with at least a part of the retraction member placed inside the plunger, and a spring acting with a spring power between the plunger and the retraction member; a hypodermic needle, displaceable between a first position, wherein it is releasable mounted in the housing and a part of the needle is protruding from the housing, and a second position, wherein the needle is retracted into the housing or the plunger; a releasable retainer arrangement acting between the plunger and the retraction member for retaining the retraction member in its advanced position in relation to the plunger, a releasing mechanism for releasing the retainer when the plunger is in or close to its advanced position, and a coupling for connecting the retraction member and the needle during or immediately after releasing the retainer. | 11-12-2009 |