CH372137A

CH372137A - Syringe

Info

Publication number: CH372137A
Application number: CH1129161A
Authority: CH
Inventors: Maillard Robert
Original assignee: Sanitex S A
Priority date: 1961-09-28
Filing date: 1961-09-28
Publication date: 1963-09-30

Description

  

  
 



  Seringue
 La présente invention a pour objet une seringue dont le capuchon de fermeture comprend au moins un ressort de freinage du mouvement du piston, en contact avec la tige de ce piston, caractérisée par le fait que ce ressort présente un revtement de   pro-    tection le recouvrant au moins sur une partie de sa longueur.



   Le dessin annexé représente, à titre d'exemple, une forme d'exécution de l'objet de la présente invention:
 La fig. 1 en est une coupe partielle longitudinale.



   La fig. 2, une coupe selon   II-II    dc la fig. 1.



   La fig. 3, une vue de détail.



   Au dessin (fig. 1) la seringue comprend un cylindre 1 en matériau transparent dont l'une des extrémités est fermée par un fond 2 présentant un ajutage 3 pour la fixation d'une aiguille hypodermique, non représentée, et sur l'autre extrémité de laquelle est fixé un anneau 4 fileté sur sa face externe en 5.



  Tant le fond 2 que l'anneau 4 sont montés étanches sur le cylindre 1.



   Sur la face   externe    du cylindre, qui peut par exemple tre exécuté en verre résistant à la chaleur, sont portées des graduations non représentées, indicatrices de sa capacité en fonction de la position d'un piston 6 engagé dans ce cylindre.



   Sur l'anneau 4 est vissé un chapeau 7 dont la face supérieure présente en son centre une ouverture 8 et dont une cloison 9 percée en 10 délimite dans son fond une chambre cylindrique 11. Dans cette chambre est disposé un ressort 12 serré par ses bras 13a et 13b autour d'une tige de commande 14 du piston 6 dont l'extrémité supérieure présente un plateau d'appui 15.



   Dans la forme d'exécution représentée en fig. 2, les bras de ce ressort sont incurvés de manière à envelopper le plus possible la tige 14 alors que dans celle   représentée    à la fig. 3 ces bras sont droits.



  Dans l'une comme dans l'autre forme d'exécution, les bras du ressort sont revtus d'une chemise 16 de protection en matière plastique, par exemple en matière plastique de marque déposée   Téflon .



   Lors d'un déplacement de la tige 14 par rapport au chapeau 7, par action sur le plateau 15, le ressort 12 produit sur cette tige un frottement en ralentissant le mouvement de manière à permettre un dosage plus précis du produit à injecter. Le revtement 16 empche le frottement direct entre le ressort et la tige 14, de manière à éviter que la couche de protection, nickel ou chrome, dont est recouverte cette tige ne soit arrachée par ce ressort.
 



   REVENDICATION
 Seringue dont le capuchon de fermeture comprend au moins un ressort de freinage du mouvement du piston dans cette seringue, en contact avec la tige de ce piston, caractérisée par le fait que ce ressort présente un revtement de protection le recouvrant au moins sur une partie de sa longueur.



   SOUS-REVENDICATIONS
 1. Seringue selon la revendication, caractérisée par le fait que ce revtement est en matière plastique.



   2. Seringue selon la revendication, caractérisée par le fait que le ressort comprend deux bras de forme incurvée sur au moins une partie de leur longueur de manière à envelopper ladite tige. 

**ATTENTION** fin du champ DESC peut contenir debut de CLMS **.



   



  
 



  Syringe
 The subject of the present invention is a syringe, the closure cap of which comprises at least one spring for braking the movement of the piston, in contact with the rod of this piston, characterized in that this spring has a protective coating covering it. at least over part of its length.



   The appended drawing represents, by way of example, an embodiment of the object of the present invention:
 Fig. 1 is a partial longitudinal section thereof.



   Fig. 2, a section along II-II of FIG. 1.



   Fig. 3, a detail view.



   In the drawing (fig. 1) the syringe comprises a cylinder 1 of transparent material, one end of which is closed by a bottom 2 having a nozzle 3 for fixing a hypodermic needle, not shown, and on the other end of which is fixed a ring 4 threaded on its outer face at 5.



  Both the bottom 2 and the ring 4 are sealed on the cylinder 1.



   On the external face of the cylinder, which can for example be made of heat-resistant glass, are marked graduations not shown, indicating its capacity as a function of the position of a piston 6 engaged in this cylinder.



   A cap 7 is screwed onto the ring 4, the upper face of which has an opening 8 at its center and of which a partition 9 pierced at 10 defines a cylindrical chamber 11 at its bottom. In this chamber is arranged a spring 12 clamped by its arms. 13a and 13b around a control rod 14 of piston 6, the upper end of which has a support plate 15.



   In the embodiment shown in FIG. 2, the arms of this spring are curved so as to envelop the rod 14 as much as possible, whereas in that shown in FIG. 3 these arms are straight.



  In one as in the other embodiment, the arms of the spring are covered with a protective jacket 16 made of plastic material, for example plastic material of the registered trademark Teflon.



   When the rod 14 moves relative to the cap 7, by acting on the plate 15, the spring 12 produces friction on this rod by slowing down the movement so as to allow a more precise dosage of the product to be injected. The coating 16 prevents direct friction between the spring and the rod 14, so as to prevent the protective layer, nickel or chromium, with which this rod is covered from being torn off by this spring.
 



   CLAIM
 Syringe, the closure cap of which comprises at least one spring for braking the movement of the piston in this syringe, in contact with the rod of this piston, characterized in that this spring has a protective coating covering it at least over part of the syringe. its length.



   SUB-CLAIMS
 1. Syringe according to claim, characterized in that this coating is made of plastic.



   2. Syringe according to claim, characterized in that the spring comprises two arms of curved shape over at least part of their length so as to envelop said rod.

** ATTENTION ** end of DESC field can contain start of CLMS **.

Claims

** ATTENTION ** start of field CLMS can contain end of DESC **.

Syringe The subject of the present invention is a syringe, the closure cap of which comprises at least one spring for braking the movement of the piston, in contact with the rod of this piston, characterized in that this spring has a protective coating covering it. at least over part of its length.

The appended drawing represents, by way of example, an embodiment of the object of the present invention: Fig. 1 is a partial longitudinal section thereof.

Fig. 2, a section along II-II of FIG. 1.

Fig. 3, a detail view.

In the drawing (fig. 1) the syringe comprises a cylinder 1 of transparent material, one end of which is closed by a bottom 2 having a nozzle 3 for fixing a hypodermic needle, not shown, and on the other end of which is fixed a ring 4 threaded on its outer face at 5.

Both the bottom 2 and the ring 4 are sealed on the cylinder 1.

On the external face of the cylinder, which can for example be made of heat-resistant glass, are marked graduations not shown, indicating its capacity as a function of the position of a piston 6 engaged in this cylinder.

A cap 7 is screwed onto the ring 4, the upper face of which has an opening 8 at its center and of which a partition 9 pierced at 10 defines a cylindrical chamber 11 at its bottom. In this chamber is arranged a spring 12 clamped by its arms. 13a and 13b around a control rod 14 of piston 6, the upper end of which has a support plate 15.

In the embodiment shown in FIG. 2, the arms of this spring are curved so as to envelop the rod 14 as much as possible, whereas in that shown in FIG. 3 these arms are straight.

In one as in the other embodiment, the arms of the spring are covered with a protective jacket 16 made of plastic material, for example plastic material of the registered trademark Teflon.

When the rod 14 moves relative to the cap 7, by acting on the plate 15, the spring 12 produces friction on this rod by slowing down the movement so as to allow a more precise dosage of the product to be injected. The coating 16 prevents direct friction between the spring and the rod 14, so as to prevent the protective layer, nickel or chromium, with which this rod is covered from being torn off by this spring.

CLAIM Syringe, the closure cap of which comprises at least one spring for braking the movement of the piston in this syringe, in contact with the rod of this piston, characterized in that this spring has a protective coating covering it at least over part of the syringe. its length.

SUB-CLAIMS 1. Syringe according to claim, characterized in that this coating is made of plastic.

2. Syringe according to claim, characterized in that the spring comprises two arms of curved shape over at least part of their length so as to envelop said rod.