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Pistons and Syringes for Syringes

A technology for syringes and pistons, applied in the field of syringes, can solve problems such as missed hearing and weak sound signals, and achieve reliable pushing and automatic centering effects

Active Publication Date: 2021-02-12
OMSI SARL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, only a very weak acoustic signal occurs in this configuration of the syringe, which is usually missed in the case of use

Method used

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  • Pistons and Syringes for Syringes
  • Pistons and Syringes for Syringes
  • Pistons and Syringes for Syringes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] figure 1 and figure 2 A first embodiment of the piston 1 is concerned. In this case, the piston 1 has a piston rod 3 , a piston head 2 is located at one end of the piston rod, and an actuating section 4 is located at the other end of the piston rod. The piston rod 3 consists of four pairs of vertically standing axial webs 5 . These axial webs 5 lead into a common central intersection or core section 6 that accommodates the longitudinal axis. figure 2 In the enlarged view, two of the balancing rod bodies 8 arranged in parallel on the piston rod 3 and extending in the circumferential direction are shown. The balancing rod body 8 has a completely surrounding disk-like or plate-like basic shape and has a likewise completely surrounding excitation edge 7 on the radially outwardly directed edge. The radial distance of the balancing rod body 8 from the longitudinal axis 12 is greater here than the radial distance of the axial web 5 from the longitudinal axis 12 of the pi...

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PUM

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Abstract

The present invention relates to a plunger for a syringe, in particular a hypodermic syringe, having a hollow body accommodating the plunger, the plunger comprising a plunger head for fluid-tightly delimiting a fluid chamber of the syringe, and a joint with the plunger A piston rod which is fixedly connected to the head and has an actuating section on which the piston can be actuated and pushed into the hollow body, wherein the piston rod is composed of a plurality of longitudinally extending shafts. A web is formed, which has a radial axis extending outwardly from the longitudinal axis and opens radially into a common intersection section which accommodates the longitudinal axis, wherein at least one radially outwardly extending portion is provided on the piston rod A free excitation edge extending out of the radial axis, which, when the piston is pushed in, engages with the vibration exciter of the hollow body in order to emit an acoustic signal, is provided for the piston and is arranged at The balance rod body between the two axial webs couples the excitation edge to the cross section, so that, in the event of excitation of vibrations in the axial direction, the balance rod body has a diameter between the excitation edge and the cross section. The length of the balance rod in the direction of the balance rod is at least 40% of the extension of the radial axis.

Description

technical field [0001] The invention relates to a plunger for a syringe, especially a hypodermic syringe. Here, the piston is designed in such a way that it gives an audible and tactile feedback to the operator when ejecting the liquid to be injected, in order to inform the operator of the amount of liquid that has been ejected. Conventional pistons for syringes of this type comprise a piston head which serves to delimit a liquid chamber of the syringe in a fluid-tight manner, which is delimited on the outside by an in particular cylindrical hollow body. The liquid is pushed from the fluid chamber to the injection end of the syringe by means of a piston which travels in a liquid-tight manner through the hollow cylinder, where it is important to determine the precise injection volume. Background technique [0002] Visual markings on the hollow cylinder designate the different spray volumes that correspond to certain fluid volumes, thereby providing the operator with visual c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/178A61M5/24A61M5/315
CPCA61M5/178A61M5/24A61M5/31511A61M5/3158A61M5/31595A61M2005/31508A61M2205/582A61M2205/581A61M5/31515A61M5/31568
Inventor 哈马德·M·奥欧玛尔
Owner OMSI SARL
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