US 5,637,100 AGranted

Syringe-cum-container

AssigneeDaikyo Seiko, Ltd.

InventorMorihiro Sudo

Life of this patent

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Abstract

An improved syringe is provided which can be used in any step of preparation of a medicament by vacuum freeze-drying, etc., storage of a medicament, mixing of medicaments and dosing of a medicament in a sanitary and stable manner. The syringe comprises a cylinder having a front end part at one end and an opening part at another end and a bypass running in the longitudinal direction near the central position of the cylinder on the inner wall within the cylinder. A first sealing stopper is adapted, at a position toward the opening part of the cylinder from the bypass within the cylinder, to form a first compartment between the front end of the cylinder and the first sealing stopper. A second sealing is stopper adapted, at a position toward the opening part of the cylinder from the first sealing stopper within the cylinder, to form a second compartment between the first sealing stopper and second sealing stopper. One or more bypasses are provided in a concave form on the inner wall surface of the cylinder, and the outer circumference of the cylinder has a smooth cylindrical shape. Further one or more bypasses can be provided in a concave form in two stages on the inner wall surface of the cylinder.

Claims15

Dependent claims

A syringe comprising:

a cylinder having a first end and a second end, said second end being an open end;
first and second sealing stoppers slidably mounted in said cylinder, said first sealing stopper being disposed between said second sealing stopper and said first end of said cylinder, whereby a first compartment is formed between said first sealing stopper and said first end of said cylinder and a second compartment is formed between said first and second sealing stoppers;
at least one longitudinally elongated first bypass formed in an inner wall surface of said cylinder at a location intermediate said first and second ends of said cylinder, said first bypass being formed by a concave groove, and said cylinder having a smooth cylindrical shape at a location of an outer wall surface thereof corresponding to a location of said first bypass formed in said inner wall surface;
at least one longitudinally elongated second bypass formed in an inner wall surface of said cylinder at a location substantially adjacent said second end of said cylinder, said second bypass being formed by a concave groove, and said cylinder having a smooth cylindrical shape at a location of an outer wall surface thereof corresponding to a location of said second bypass formed in said inner wall surface;
wherein said second bypass has a length greater than a longitudinal thickness of said first sealing stopper;
and
wherein said cylinder has an uninterrupted uniform outer diameter extending from a position adjacent said first end of said cylinder to an extreme end of said second end of said cylinder.

4 more elements

A syringe comprising:

a cylinder having a first end and a second end, said second end being an open end;
first and second sealing stoppers slidably mounted in said cylinder, said first sealing stopper being disposed between said second sealing stopper and said first end of said cylinder, whereby a first compartment is formed between said first sealing stopper and said first end of said cylinder and a second compartment is formed between said first and second sealing stoppers;
at least one longitudinally elongated first bypass formed in an inner wall surface of said cylinder at a location intermediate said first and second ends of said cylinder, said first bypass being formed by a concave groove, and said cylinder having a smooth cylindrical shape at a location of an outer wall surface thereof corresponding to a location of said first bypass formed in said inner wall surface;
a finger-engaging flange member removably fit over said open second end of said cylinder, said finger-engaging flange member having a central plunger-receiving opening formed therein;
at least one longitudinally elongated second bypass formed in an inner wall surface of said cylinder at a location substantially adjacent said second end of said cylinder, said second bypass being formed by a concave groove, and said cylinder having a smooth cylindrical shape at a location of an outer wall surface thereof corresponding to a location of said second bypass formed in said inner wall surface;
wherein said second bypass has a length greater than a longitudinal thickness of said first sealing stopper;
and
wherein said finger-engaging flange member has a radially inwardly projecting portion, and said cylinder has a recess in the outer wall surface thereof adjacent said second open end, said inwardly projecting portion being engageable in said recess.

5 more elements

A syringe comprising:

a cylinder having a first end and a second end, said second end being an open end;
first and second sealing stoppers slidably mounted in said cylinder, said first sealing stopper being disposed between said second sealing stopper and said first end of said cylinder, whereby a first compartment is formed between said first sealing stopper and said first end of said cylinder and a second compartment is formed between said first and second sealing stoppers;
at least one longitudinally elongated first bypass formed in an inner wall surface of said cylinder at a location intermediate said first and second ends of said cylinder, said first bypass being formed by a concave groove, and said cylinder having a smooth cylindrical shape at a location of an outer wall surface thereof corresponding to a location of said first bypass formed in said inner wall surface;
at least one longitudinally elongated second bypass formed in an inner wall surface of said cylinder at a location substantially adjacent said second end of said cylinder, said second bypass being formed by a concave groove, and said cylinder having a smooth cylindrical shape at a location of an outer wall surface thereof corresponding to a location of said second bypass formed in said inner wall surface;
a rubber stopper fit in said first end of said cylinder, said rubber stopper having a central recess opening in a direction away from said second end of said cylinder, such that said rubber stopper has a U-shaped longitudinal cross section;
and
wherein said second bypass has a length greater than a longitudinal thickness of said first sealing stopper.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/538,379Filed 3 Oct 1995 · continuation
Priority: JP 5-21294927 Aug 1993
Granted: 10 Jun 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

A61M 5/31511
Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing…:…
A61M 5/284
Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle: comprising means for injection of two or more media, e.g. by mixing
A61M 5/3129
Details: syringe barrels
A61M 2005/3118
Means preventing contamination of the medicament compartment of a syringe: via the distal end of a syringe, i.e. syringe end for mounting a needle…