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EP0248210A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Syringe

Assignee: Sunstar Inc
•
Filing: 1987-04-29
•
Granted: —
•
Expires: 2007-04-29
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Abstract

Abstract A syringe having a barrel (1) fitted with a plunger (2) and a nozzle (10) in which the barrel (1) comprises a hollow cylindrical portion (3) and a tubular por­tion (8) which is thinner than the cylindrical portion (3) and connected to one end of the cy­lindrical portion (3), the other end of said cylindrical portion (3) is an open end (5), and at least a part of the cylindrical portion (3) adjacent to the open end (5) has a diameter larger than that of one end of the plunger (2) to be inserted in the barrel (1) so that air present between the end of the plunger (2) and the top surface of a medicament in the barrel (1) can vent through the enlarged diameter part when the plunger (2) is pushed into the barrel (1).

Inventors

  • 👤 Kenji Hasegawa
  • 👤 Kyoji Matsui
  • 👤 Seiji Kita
  • 👤 Seiichiro Kubo
  • 👤 Seiichi Iida

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-26 01:50
CPC Classifications
A; A61; A61M; A61M3/00; A61M5/00; A61M5/178; A61M5/31; A61M5/3129; A61M2005/3123; A61M5/32; A61M5/34; A61M2005/341; A61M5/315; A61M5/31511; A61M5/3286

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 119 words
A syringe having a barrel fitted with a plunger and a nozzle in which the barrel comprises a hollow cylindrical portion and a tubular portion which is thinner than the cylindrical portion and connected to one end of the cylindrical portion, the other end of said cylindrical portion is an open end, and at least a part of the cylindrical portion adjacent to the open end has a diameter larger than that of one end of the plunger to be inserted in the barrel so that air present between the end of the plunger and the top surface of a medicament in the barrel can vent through the enlarged diameter part when the plunger is pushed into the barrel.
Claim 2
Dependent Claim 119 words
A syringe having a barrel fitted with a plunger and a nozzle in which the barrel comprises a hollow cylindrical portion and a tubular portion which is thinner than the cylindrical portion and connected to one end of the cylindrical portion, the other end of said cylindrical portion is an open end, and at least a part of the cylindrical portion adjacent to the open end has a diameter larger than that of one end of the plunger to be inserted in the barrel so that air present between the end of the plunger and the top surface of a medicament in the barrel can vent through the enlarged diameter part when the plunger is pushed into the barrel.
Claim 3
Dependent Claim 16 words
A syringe according to claim 1, wherein a medicament has been already filled in the barrel.
Claim 4
Dependent Claim 13 words
A syringe according to claim 1 or 2, which is a dentist's syringe.
Claim 5
Dependent Claim 35 words
A syringe according to any of claims 1 to 3, wherein the enlarged diameter part is one or plurality of grooves provided on the inner surface of the barrel at the open end part thereof.

References Cited (Backward Citations)

AT178158B Cited
US3882866A Cited
FR2178019A1 Cited
EP0145922A2 Cited
US4464173A Cited
FR2543833A1 Cited

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