Patent EA-001354-B1 (EA)
Title: Syringe protection cap
Inventor: OLOVSON GUDMAR
IPC: A61M5/31
Filed: 1998-09-18
Abstract: 1. A needle protection device adapted to an hypodermic needle which includes a container, a plunger that can be moved reciprocatingly in said container by means of a rod, and a needle which is permanently fixed to or can be fastened to one end-part of said container, wherein the needle protection device has the basic form of an end-sealed tubular member whose axial length is slightly greater than the length of the needle, wherein said tubular member has an inner radial-related cross-sectional shape that corresponds to or essentially to an outer radial-related cross-sectional shape of the container, wherein said tubular member is movable axially relative to the container between a position in which it covers the needle and a position in which the needle is exposed, or vice versa, wherein the end-part of said device that lies distal from the container is provided with a membrane which seals the cross-sectional area of said tubular member, and wherein said membrane has a thickness which will enable the point of the needle to penetrate said membrane when the tubular member is moved along said container to expose said needle, characterised in that the membrane is positioned so as to cover the cross-sectional area of said tubular member at an adapted distance from an end-edge or end-surface of said tubular member. 2. A needle protection device according to claim 1, characterised in that a first end-part of the tubular member located distal from the membrane is provided with a first part of a two-part coupling element between the tubular member and said container. 3. A needle protection device according to claim 2, characterised in that said first part is comprised of an inner radially and/or axially related groove or edge. 4, A needle protection device according to claim 2, characterised in that the second part of the two-part coupling element is comprised of a radially related and/or axially related edge or groove on said container. 5. A needle protection device according to claim 1, characterised in that said edge is positioned adjacent said end-part. 6. A needle protection device according to claim 1, 2 or 4, characterised in that the material from which the tubular member is made and the dimensioning of said tubular member, at least adjacent the first end-part, are such as to enable the tubular member to expand over said edge. 7. A needle protection device according to claim 1 or claim 2, characterised in that a first end-part distal from the membrane includes two first parts of a two-part coupling arrangement, with said two first parts axially displaced from one another. 8. A needle protection device according to claim 1, characterised in that said membrane is positioned within the tubular member at a distance from the end surface of said member from 2-10 mm, preferably at about 3-5 mm. 9. A needle protection device according to claim 1, characterised in that said membrane is fastened to the tubular member through the medium of a ring-shaped reinforcement. 10. A needle protection device according to claim 1, characterised in that said device is formed from a transparent plastic material.