Metering receptacle
View Patent ↗A metering receptacle has an elongate hollow body which at one end has a closable exit opening, and which at the other end is closable by way of a plastic plunger stopper. The plunger stopper is at the same time longitudinally displaceable in the hollow body by way of a plunger rod. The metering receptacle is configured such that the plunger stopper is formed of two parts, with a sealing stopper part of plastic which is rigidly positionable in the elongate hollow body and has a centric bore for the passage of the plunger rod, and with a longitudinally displaceable plunger part of lubricious plastic which is connected to the plunger rod.
1. A metering receptacle, comprising:
an elongate hollow body having a first end with a closable exit opening and a second end;
a plunger part of lubricious plastic accommodated in the hollow body in a longitudinally displaceable manner so as to contact the hollow body at all positions of the plunger part in the hollow body;
a plunger rod attached to the plunger part; and
a sealing stopper part of plastic which occupies a fixed position completely within the elongate hollow body and has a centric through-bore for the passage of the plunger rod, wherein the stopper part is a one piece stopper part which sealingly contacts the hollow body and sealingly contacts the plunger rod when the plunger part is against the stopper part;
wherein the displaceable plunger part is movable away from the sealing stopper part when the plunger rod is moved through the through-bore, said plunger part having circumferential sealing lips on a side facing said stopper part.
2. A metering receptacle according to claim 1 , wherein the plunger part is formed as one piece with the plunger rod.
3. A metering receptacle according to claim 1 , wherein the plunger part is releasably connected to the plunger rod.
4. A metering receptacle according to claim 3 , wherein the plunger part is connected to the plunger rod by a screw connection.
5. A metering receptacle according to claim 1 , wherein a sliding layer is deposited on an outer circumference of the plunger rod.
6. A metering receptacle according to claim 5 , wherein the sliding layer is a silicone layer.
7. A metering receptacle according to claim 1 , wherein the plunger rod is made of a self lubricating plastic.
8. A metering receptacle according to claim 7 , wherein the rod is made of PTFE.
9. A metering receptacle according to claim 1 , wherein the stopper part is of an elastomer plastic.
10. A metering receptacle according to claim 1 , wherein the stopper part has peripheral sealing lips on its outer circumference as well as in the centric bore.
11. A metering receptacle according to claim 10 , wherein the stopper part has at least two sealing lips lying over one another on at least one of said outer circumference and said centric bore.
12. A metering receptacle according to claim 1 , wherein the plunger rod has a venting channel parallel to a longitudinal axis of the plunger rod.
13. A metering receptacle according to claim 1 , wherein the metering receptacle is a prefilled disposable receptacle.
14. A metering receptacle according to claim 13 , wherein the receptacle is a ready syringe.
15. A metering receptacle comprising:
an elongate hollow body having a first end with a closable exit opening, an opposed second end, and a passage of uniform cross-section between said ends;
an elastomeric sealing stopper part which occupies a fixed position in the passage toward the second end, said stopper part having a centric through-bore;
a plunger part of lubricious plastic located in said passage and displaceable away from said sealing stopper part, said plunger part and said sealing stopper part completely sealing said second end of said hollow body when said plunger part is located against said sealing stopper part, said plunger part having circumferential sealing lips on a side facing said stopper part, said lips pressing into said elastomeric stopper part to provide a seal when said plunger part is located against said stopper part; and
a plunger rod attached to the plunger part and received through said through-bore of said sealing stopper part.
16. A metering receptacle as in claim 15 wherein said plunger part and said plunger rod are formed as one piece.
17. A metering receptacle as in claim 15 wherein said sealing stopper part is made as a single piece which sealingly engages said hollow body and sealingly engages said plunger rod when said plunger part is located against said sealing stopper part.
18. A metering receptacle as in claim 17 wherein said plunger rod comprises a venting channel which communicates with said passage when said plunger part is displaced away from said sealing stopper part.