Injector module for a syringe and pre-filled syringe provided therewith
First Claim
1. An injector module having a syringe subassembly, said module comprising:
- a cylindrical barrel having a distal and proximate extremity;
a needle extending from said proximate extremity and attached to said barrel by a needle-holder tip;
a sleeve being movable between a retracted position, exposing said needle, and an advanced position, covering said needle,wherein said sleeve comprises a single rigid piece telescopically interlocked with and axially slidable on said barrel;
an annular skirt, attached to said proximate extremity, surrounding said needle-holder tip (45);
at least two diametrically opposed flexible tabs on said skirt that cooperate with an interior annular rib (50) on said rigid piece to form an anti-return device when said sleeve is in the advanced position; and
at least one stop means also cooperating with said annular rib (50) on said sleeve thereby to define a path of said sleeve when said sleeve is in the advanced position, said stop means comprising an annular protruding rib extending across two diametrically opposed circular portions respectively located between said flexible tabs.
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Accused Products
Abstract
An injector module (40) and a one- or two-component syringe comprising the same, the module including a cylindrical barrel (41), a needle (43) extending from the end thereof, and a protective sleeve (42) for said needle. The sleeve consists of a single rigid member axially slidable over the cylindrical barrel (41). The cylindrical barrel is provided with a skirt (46) with at least one flexible tab (47) engageable with an inner ring-shaped rib (50) of the rigid cylindrical sleeve to prevent the return of the sleeve once it has been moved forward. For this purpose, the flexible tabs (47) comprise a slanted end (47a) and a rounded edge (47b) which engage said inner rib.
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Citations
18 Claims
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1. An injector module having a syringe subassembly, said module comprising:
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a cylindrical barrel having a distal and proximate extremity; a needle extending from said proximate extremity and attached to said barrel by a needle-holder tip; a sleeve being movable between a retracted position, exposing said needle, and an advanced position, covering said needle, wherein said sleeve comprises a single rigid piece telescopically interlocked with and axially slidable on said barrel; an annular skirt, attached to said proximate extremity, surrounding said needle-holder tip (45); at least two diametrically opposed flexible tabs on said skirt that cooperate with an interior annular rib (50) on said rigid piece to form an anti-return device when said sleeve is in the advanced position; and at least one stop means also cooperating with said annular rib (50) on said sleeve thereby to define a path of said sleeve when said sleeve is in the advanced position, said stop means comprising an annular protruding rib extending across two diametrically opposed circular portions respectively located between said flexible tabs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A prefilled syringe having at least one compartment for holding a medicinal substance that is to be reconstituted by mixing with another component, said syringe comprising
(i) an injector module, which further comprises: -
a cylindrical barrel having a distal and proximate extremity; a needle extending from said proximate extremity and attached to said barrel by a needle-holder tip; a sleeve being movable between a retracted position exposing said needle and an advanced position covering said needle, wherein said sleeve comprises a single rigid piece telescopically interlocked with and axially slidable on said barrel; an annular skirt, attached to said proximate extremity, surrounding said needle-holder tip; at least two diametrically opposed flexible tabs on said skirt that cooperate with an interior annular rib on said rigid piece to form an anti-return device when said sleeve is in the advanced position; and at least one stop means also cooperating with said annular rib on said sleeve thereby to define a path of said sleeve when said sleeve is in the advanced position, said stop means comprising an annular protruding rib extending across two diametrically opposed circular portions respectively located between said flexible tabs; and (ii) a propulsion receptacle module, which further comprises; at least one receptacle for defining said compartment, said receptacle being slidable within said barrel to act as a piston shaft; and at least one stopper for containing said medicinal substance within said receptacle, said stopper being slidable within said receptacle to act as a piston. - View Dependent Claims (15, 16, 17, 18)
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Specification