Syringe barrel and cylinder holder

• US 6,676,635 B2
• Filed: 02/09/2001
• Issued: 01/13/2004
• Est. Priority Date: 02/10/2000
• Status: Expired due to Term

• Current Assignee: Nemoto Kyorindo Company Limited
• Original Assignee: Nemoto Kyorindo Company Limited
• Inventors: Nemoto, Shigeru
• Primary Examiner(s): Derakshani, Philippe
• Application Number:
  US09/780,731
• Publication Number:
  US 20010021823A1
• Time in Patent Office: 1,068 Days
• Field of Search: 604/154, 222/327
• US Class Current: 604/154
• 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 syringe barrel which can be mounted on a cylinder holder for fixing the syringe barrel by holding a flange of the syringe barrel by a flange insertion groove, and which can be used for an injection apparatus;

the syringe barrel comprising;

a concave portion which is formed on the flange and can be engaged with a positioning mechanism installed in the cylinder holder.

2. The syringe barrel according to claim 1, wherein the positioning mechanism is a latch pushed by a coil spring.

3. The syringe barrel according to claim 1, wherein the concave portion is adapted to fit in the positioning mechanism.

4. A pre-filled syringe, comprising:

the syringe barrel of claim 1; and

a chemical solution filled in the syringe.

5. The syringe barrel according to claim 2, wherein the concave portion is adapted to fit in the positioning mechanism.

6. A chemical solution injecting system, comprising:

a syringe barrel of any of claims 1 to 7; and

an injecting apparatus having the cylinder holder, a piston holder which holds a piston used together with this syringe barrel and can move relatively to the cylinder holder, and a driving mechanism which moves the piston holder.

7. A syringe barrel which can be mounted on a cylinder holder for fixing the syringe barrel by holding a flange of the syringe barrel by a flange insertion groove, and which can be used for an injection apparatus;

the syringe barrel comprising;

a concave portion which can be engaged with a positioning mechanism installed in the cylinder holder, wherein the positioning mechanism is a blade spring having a pawl.

8. The syringe barrel according to claim 7, wherein the concave portion is adapted to fit in the positioning mechanism.