Device for providing bone cement

Patent metadata

Field	Value
Publication number	US-11490941-B2
Application number	US-201916655345-A
Country	US
Kind code	B2
Filing date	Oct 17, 2019
Priority date	Oct 25, 2018
Publication date	Nov 8, 2022
Grant date	Nov 8, 2022

Abstract

One aspect relates to a device for providing a bone cement from two starting components, having a hollow cylinder-shaped first container, in which a monomer liquid as first starting component can be stored, a hollow cylinder-shaped second container comprising a container wall, a first internal space, and a second internal space, whereby a bone cement powder as second starting component can be stored in the first internal space, and whereby the monomer liquid can be conveyed into the second internal space, a fluid-conducting conveying means arranged between the first internal space and the second internal space, whereby the first container and the second container are axially connected to each other.

First claim

The invention claimed is:

1. A device for providing a bone cement made of two starting components, comprising:
a hollow cylinder-shaped first container containing a glass ampoule with a monomer liquid as a first starting component and an opening device for the glass ampoule;
a hollow cylinder-shaped second container comprising a container wall, a first internal space, and a second internal space;
wherein a bone cement powder as a second starting component is stored in the first internal space; and
wherein the monomer liquid can be conveyed into the second internal space;
a fluid-conducting conveying means arranged between the first internal space and the second internal space;
wherein the first container and the second container are axially connected to each other;
wherein a dispensing plunger is configured to be axially shifted in the second container and is arranged between the first container and the second internal space;
whereby the dispensing plunger acts in concert appropriately with the container wall such that,
in a first position of the dispensing plunger, the first container and the second internal space are connected in monomer liquid-conducting manner; and,
in a second position of the dispensing plunger, the first container and the second internal space are connected in monomer liquid-non-conducting manner so that the monomer liquid is conveyed into the first internal space.

2. The device of claim 1 , wherein the container wall comprises a first subsection with at least one recess and a second subsection that is designed to be recess-free.

3. The device of claim 2 , characterized in that the dispensing plunger, in the first position, is adjacent to the first subsection in appropriate manner such that the monomer liquid can flow about the dispensing plunger via the at least one recess.

4. The device of claim 2 , characterized in that the dispensing plunger, in the second position, is adjacent to the second subsection in appropriate manner such that the monomer liquid cannot flow about the dispensing plunger.

5. The device of claim 1 , characterized in that the dispensing plunger is cambered.

6. The device of claim 1 , characterized in that the first container and the dispensing plunger are designed to be a single part.

7. The device of claim 1 , characterized in that the opening device is a puncturing mandrel.

8. The device of claim 1 , characterized in that the first container comprises an axially shiftable conveying plunger, designed appropriately such that the vessel can be conveyed onto the opening device by the conveying plunger.

9. The device of claim 1 , characterized in that the first container can be inserted axially, at least in part, into the second container in appropriate manner such that the dispensing plunger can be moved over the length of the second internal space and at least a part of the length of the first internal space.

10. The device of claim 1 , characterized in that the first container comprises an external thread and the second container comprises an internal thread, whereby the external thread and the internal thread are connected or can be connected to each other in form-fitting and/or force-locking manner.

Assignees

• Heraeus Medical Gmbh

Inventors

• Vogt Sebastian
• Kluge Thomas

Classifications

• B01F2101/20

  Mixing of ingredients for bone cement · CPC title

• B01F23/59

  Mixing systems, i.e. flow charts or diagrams · CPC title

• A61B2017/8838

  for mixing bone cement or fluid fillers · CPC title

• B01F35/7161

  the containers being connected coaxially before contacting the contents · CPC title

• A61B17/8822

  characterised by means facilitating expulsion of fluid from the introducer, e.g. a screw pump plunger, hydraulic force transmissions, application of vibrations or a vacuum · CPC title