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Plunger rod with dose setting means and injection device

A technology for injection devices and plunger rods, which can be used in syringes, hypodermic injection devices, infusion sets, etc., and can solve the problems of drug storage space limitations

Active Publication Date: 2014-05-14
BECTON DICKINSON FRANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is especially the case in hospitals and pharmacies, where storage space for medicines is limited

Method used

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  • Plunger rod with dose setting means and injection device
  • Plunger rod with dose setting means and injection device
  • Plunger rod with dose setting means and injection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] about figure 1 , in which is shown a plunger rod 1 according to the invention which can be used in combination with a container having a tubular barrel in order to obtain an injection device occupying only a limited volume and allowing the presetting of selected doses of the product Sequential dose delivery.

[0049] refer to Figure 1-3 , the plunger rod 1 of the present invention has a longitudinal axis A, and comprises a distal element 20, and a proximal element 30, the distal element 20 has a proximal end 20a and a distal end 20b, the proximal element 30 has A proximal end 30a and a distal end 30b.

[0050] refer to figure 2 , the distal element 20 has the overall shape of a tube 21 comprising a tubular portion 21a open at its proximal end and closed at its distal end by a transverse wall 21b. Regarding the example shown, the transverse wall 21b is also provided with a stud 22 extending in the distal direction: as will be appreciated from the description herein...

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PUM

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Abstract

The present invention relates to a plunger rod (1) for an injection device. The plunger rod (1) comprises a distal element (20) slidingly coupled to a proximal element (30) having one radially flexible branch (33); locking means (23, 33, 35) for selectively locking the distal element and the proximal element in a plurality of relative axial positions defining a plurality of intermediate positions of the plunger rod. When the radially flexible branch is displaced radially, the locking means is movable from a locked state to an unlocked state. In the locked state, the distal element and the proximal element are fixed with respect to each other in the axial direction, and in the unlocked state, the distal element and the proximal element are displaceable in the axial direction with respect to each other. The invention also relates to an injection device comprising the plunger rod.

Description

technical field [0001] The present invention relates to a plunger rod for an injection device which is not only very compact but also capable of delivering a selected dose of product. The invention also relates to a compact injection device comprising such a plunger rod. Background technique [0002] In this application, when the element or device is in the position of use, the distal end of an element or device means the end furthest from the user's hand and the proximal end means the end farthest from the user's hand. nearest end. Similarly, in this application, the terms "in the distal direction" and "distally" refer to the injection direction, and the terms "in the proximal direction" and "proximally" refer to the injection direction in the opposite direction. [0003] Injection devices such as syringes are widely known. Many different types of injection devices have been designed for administering pharmaceuticals. Injection devices generally comprise a container to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/315
CPCA61M5/31555A61M5/3156A61M5/31578A61M5/31593A61M2005/31506A61M2005/31508A61M2005/31518A61M5/31501A61M5/31515
Inventor G·格兰于特
Owner BECTON DICKINSON FRANCE
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