EP0072058A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Multiple-compartment syringe
Assignee: Duphar International Research BV
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Filing: 1982-07-13
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Granted: —
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Expires: 2002-07-13
Abstract
Abstract The invention relates to a syringe for injecting two or more injection liquids which may not be in contact with each other for a longer period of time, comprising a barrel having a piston, a needle on the front side of the barrel, a sealing stopper in the barrel on the front and one or more separating stoppers which, before use of the syringe, keep the injection liquids separated from each other. The needle is connected to the front of the barrel by means of a needle holder comprising a collar to connect the needle holder to the barrel, a neck to connect the Injection needle, and a hollow shaft between collar and neck, in which a passage is formed in the inner wall of the shaft and the rear face of the neck, past which passage the injection liquids can reach the cannula when during use of the syringe the stoppers are moved into the shaft of the needle holder.
Inventors
- 👤 Paulus R. Kamstra
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 16:29
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/28; A61M5/284; A61M2005/1787; A61M5/31; A61M5/3129; A61M2005/3132; A61M5/3137; A61M2005/3139
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
263 words
A syringe for injecting two or more different injection liquids which may not be in contact with each other for a longer period of time, comprising a rotationally symmetrical barrel which is open at each end, a piston which is movable in the barrel and seals same, to which piston a piston rod is or can be connected, a needle or means to connect same to the front end of the barrel, a sealing stopper the dimensions of which are such that it can be provided sealingly in the opening on the front end of the barrel, one or more separating stoppers to be provided in the barrel and movable therein which can keep the injection liquids present in the barrel separated from each other before use of the syringe in that their circumference sealingly adjoins the inner wall of the barrel, and a finger grip or means for the connection thereof to the outside of the barrel, characterized in that the needle is or can be connected to the front of the barrel by means of a needle holder consisting of a collar which is or can be provided sealingly on the front of the barrel, a neck in which the injection needle is or can be connected and a hollow shaft between collar and neck in which in the inner wall of the shaft and the rear face of the neck a passage is formed past which the injection liquids can reach the cannula when during use of the syringe the stoppers are moved into the shaft of the needle holder.
Claim 2
Dependent Claim
263 words
A syringe for injecting two or more different injection liquids which may not be in contact with each other for a longer period of time, comprising a rotationally symmetrical barrel which is open at each end, a piston which is movable in the barrel and seals same, to which piston a piston rod is or can be connected, a needle or means to connect same to the front end of the barrel, a sealing stopper the dimensions of which are such that it can be provided sealingly in the opening on the front end of the barrel, one or more separating stoppers to be provided in the barrel and movable therein which can keep the injection liquids present in the barrel separated from each other before use of the syringe in that their circumference sealingly adjoins the inner wall of the barrel, and a finger grip or means for the connection thereof to the outside of the barrel, characterized in that the needle is or can be connected to the front of the barrel by means of a needle holder consisting of a collar which is or can be provided sealingly on the front of the barrel, a neck in which the injection needle is or can be connected and a hollow shaft between collar and neck in which in the inner wall of the shaft and the rear face of the neck a passage is formed past which the injection liquids can reach the cannula when during use of the syringe the stoppers are moved into the shaft of the needle holder.
Claim 3
Dependent Claim
111 words
A syringe as claimed in Claim 1, characterized in that the rear face of the neck of the needle holder comprises a few spacing supports and that the room bounded by the inner wall of the shaft and the spacing supports on the rear face of the neck has the same or a slightly larger circumference than the inner wall of the barrel and is slightly longer than the collective stoppers, so that in the extreme forward position the collective stoppers can fill said room substantially entirely, in which, however, an opening or openings remain(s) between the stoppers and the inner wall of the shaft and extend(s) to behind the stoppers.
Claim 4
Dependent Claim
113 words
A syringe as claimed in Claim 1, characterized in that the front face of the sealing stopper comprises a few spacing supports, and that the room bounded by the inner wall of the shaft and the rear face of the neck of the needle holder has a slightly larger circumference than the inner wall of the barrel and is slightly longer than the collective stoppers including the spacing supports on the sealing stopper so that in the extreme forward position the collective stoppers can fill said room substantially entirely, in which, however, an opening or openings remain(s) between the stoppers and the inner wall of the shaft and extend(s) to behind the stoppers.
Claim 5
Dependent Claim
122 words
A syringe as claimed in any of the preceding claims, characterized in that one or more slots extending from the rear end of the shaft to the rear aperture of the cannula are recessed in the inner wall of the shaft and the rear face of the neck of the needle holder, and that the room bounded by the inner wall of the shaft and the rear face of the neck, apart from the said slot or slots, has approximately the same circumference as the inner wall of the barrel and is slightly longer than the collective stoppers so that the collective stoppers, in the extreme forward position, do not cover the part of the said slot or slots adjoining the barrel.
Claim 6
Dependent Claim
72 words
A syringe as claimed in any of the preceding Claims, characterized in that the barrel is filled with different injection liquids which are present between the piston and the separating stopper, between the separating stopper and the sealing stopper, and, if more than one separating stopper is present, between the separating stoppers, the front end of the barrel being sealed by the sealing stopper which is just present entirely in the barrel.
Claim 7
Dependent Claim
121 words
A needle holder for a syringe as claimed in any of the preceding Claims, comprising a collar with which the needle holder can be sealingly connected to the front of a barrel in which a piston and at least two stoppers can be provided, a neck in which an injection needle can be connected, and a hollow shaft connecting the collar to the neck in a sealing manner, characterized in that the room bounded by the inner wall of the shaft and the rear face of the neck is slightly longer than the collective stoppers to be provided in the barrel to be connected to the needle holder and has a slightly larger circumference than the inner wall of the barrel.
Claim 8
Dependent Claim
64 words
A syringe as cleimed in any of the Claims 1-5, characterized in that it comprises a needle holder optionally provided with an injection needle and a separate barrel to be connected to the needle holder, which barrel comprises a piston to which a piston rod is or can be connected, at least two stoppers, and a finger grip or means for the connection thereof.
References Cited (Backward Citations)
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