Syringe barrel with roughened surface

• US 20040087910A1
• Filed: 10/23/2003
• 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 7,695,457 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 syringe barrel, comprising a flange having a front surface and a rear surface,

wherein at least one of the front surface and the rear surface of the flange is roughened.

2. A syringe barrel according to claim 1 for use in an injection apparatus, said syringe barrel adapted to be mounted on a cylinder holder that comprises a flange insertion groove, wherein said flange is adapted to be held by said flange insertion groove so as to fix the syringe barrel.

3. The syringe barrel according to claim 1, wherein the front surface of the flange is roughened.

4. A syringe barrel according to claim 3 for use in an injection apparatus, said syringe barrel adapted to be mounted on a cylinder holder that comprises a flange insertion groove, wherein said flange is adapted to be held by said flange insertion groove so as to fix the syringe barrel.

9. A pre-filled syringe, comprising:

a syringe comprising a syringe barrel of any of claims 1 to 4 or a syringe piston of claim 6;

and

a chemical solution filled in the syringe.

5. A cylinder holder comprising a flange insertion groove having at least one surface for holding a syringe barrel that comprises a flange having a front surface and a rear surface;

at least one of the surfaces of the flange insertion groove being roughened, said roughened surface adapted to be contacted with the front surface or the rear surface of the flange.

6. The cylinder holder according to claim 5, wherein the surface to be contacted with the front surface of the flange of the syringe barrel is roughened.

7. A syringe piston, comprising a syringe piston rod having a rear end surface that is roughened.

8. A piston holder, comprising a roughened press surface adapted to contact the rear end surface of a syringe piston rod.