Cylinder holder for a syringe barrel

• US 20040087908A1
• Filed: 10/20/2003
• Published: 05/06/2004
• Est. Priority Date: 02/10/2000
• Status: Active Grant

• Current Assignee: Shigeru Nemoto
• Original Assignee: Shigeru Nemoto
• Inventors: Nemoto, Shigeru
• Granted Patent: US 7,137,967 B2
• Time in Patent Office: Days
• US Class Current: 604/232
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 5/007 for contrast media
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: A61M 5/1456 with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
• CPC Class Codes: A61M 5/1458 Means for capture of the plunger flange
• CPC Class Codes: A61M 5/3135 characterised by constructional features of the proximal end

Abstract

Since this syringe has projections provided on the rear surface of a flange of a syringe barrel, when it is inserted in an insertion groove of a cylinder holder, the tips of projections are compressed and the flange is fixed. Consequently, even when a solution having high viscosity is injected at higher pressure, breakage does not occur easily. Further, pressure-receiving area may also be increased by providing a guide defining mounting direction of a syringe, alternatively, a positioning mechanism may be provided so as to obtain mounting at a correct position, or the surface of a flange may be roughened.

Claims

1. A cylinder holder for an injection apparatus adapted for holding a syringe barrel, comprising:

a flange insertion groove adapted to fix the syringe barrel by holding a flange on said syringe barrel; and

a positioning mechanism installed in the cylinder holder;

the positioning mechanism adapted to engage a concave portion provided on the syringe barrel.

2. A cylinder holder according to claim 1, wherein the positioning mechanism is a latch pushed by a coil spring.

3. A cylinder holder according to claim 1, wherein the positioning mechanism is a blade spring having a pawl.

4. A cylinder holder according to claim 1, wherein the cylinder holder is provided directly on the injection apparatus.

5. A cylinder holder according to claim 1, wherein the cylinder holder is an adapter to which the syringe barrel can be mounted when the adapter is set in the injection apparatus.