Syringe and plunger rod with stopper guide

一种柱塞杆、注射器的技术，应用在柱塞杆领域

Active Publication Date: 2019-10-08
BECTON DICKINSON & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plugs may deflect at angles that could cause leaks

Method used

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  • Syringe and plunger rod with stopper guide
  • Syringe and plunger rod with stopper guide
  • Syringe and plunger rod with stopper guide

Examples

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Embodiment Construction

[0031] Reference is made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The description of these embodiments illustrates the present invention by referring to the figures.

[0032] For purposes of the following description, the terms "upper", "lower", "right", "left", "vertical", "horizontal", "top", "bottom", "transverse", "vertical" and their derivatives shall be Relating to the invention oriented as in the drawings. However, it should be understood that the invention may assume various alternative changes unless expressly stated to the contrary. It is also to be understood that the specific arrangements shown in the drawings and described in the following specification are exemplary embodiments of the invention. Specific dimensions and other physical characteristics related to the embodiments disclosed herein are not to be considered limit...

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Abstract

A syringe assembly (10) has a syringe barrel (12), a plunger rod (14) and stopper (16), wherein the syringe barrel has an open end receiving the plunger rod and stopper in a sliding direction. The plunger rod includes a shaft (52) having a longitudinal axis with a first end having a coupling member (62) for coupling with the stopper. The shaft has a least one plunger rod support (82) extending radially outer from the shaft and spaced from the first end for cooperating with an inner surface of the syringe barrel (12) to resist lateral movement and tilting of the plunger rod relative to the longitudinal axis of the axial passage of the syringe barrel. The shaft in one embodiment has at least two spaced apart points of support (41) and (82) for maintaining the axis of the plunger rod on axiswith the syringe barrel to limit twisting and tilting of the stopper thereby resisting distortion of the stopper that can cause leakage.

Description

[0001] This application claims priority to US Provisional Application No. 62 / 460,586, filed February 17, 2017, which is hereby incorporated by reference in its entirety. technical field [0002] In general, the present invention relates to syringes and plunger rods. More specifically, the present invention relates to a plunger rod provided with a bung guide for helping to maintain a seal and prevent leakage when the plunger rod is off-axis relative to the syringe barrel. Background technique [0003] Syringes are used to deliver substances and to draw and collect arterial blood samples from patients. Various types of syringes have been designed including plastic or glass syringe barrels, sealing elastomeric stoppers and plunger rods. The syringe may include a self-sealing filter that allows air to escape from the syringe during sample collection while still preventing passage of the fluid being collected. This syringe with filter allows sample collection without the need f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/31A61M5/315
CPCA61M5/31513A61M5/31515
Inventor G·博格特J·蒙德罗A·普利斯
Owner BECTON DICKINSON & CO
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