The needle of a syringe, wire guide, biopsy needle, Huber needle and the like is drawn into a protective cap and sheath arrangement after use for disposal purposes. The cap is tethered to a housing in which the needle is mounted by the sheath. The sheath is made of a film material that has a high tensile...http://www.google.de/patents/US8066678?utm_source=gb-gplus-sharePatent US8066678 - Safety needle with collapsible sheath
