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Device for mixing and dispensing a pasty mass

A technology of pasty substances and mixtures, applied in the field of making cement mixtures, especially bone cement, which can solve the problems of inability to collect and achieve the effects of easy implementation, cheap manufacturing, and reduced risk of failure

Active Publication Date: 2014-05-21
HERAEUS MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One problem associated with ethylene oxide disinfection is that the gaseous agent first needs to penetrate into the cylinder and / or cement reservoir into the cement powder and needs to diffuse from the cylinder after disinfection is complete
Collection in vacuum could not be done because firstly the fixation of the sterile plunger on the cylinder could be released only by the action of the cement applicator's pestle, while unlocking by hand was not feasible; and secondly due to the broken mixing rod will be sucked into the interior of the cylinder under the action of vacuum

Method used

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  • Device for mixing and dispensing a pasty mass
  • Device for mixing and dispensing a pasty mass
  • Device for mixing and dispensing a pasty mass

Examples

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Embodiment Construction

[0100] figure 1 A schematic perspective view of a dosing plunger with a mixing element 1 and a mixing rod 2 for a device according to the invention is shown. The dosing plunger has cylindrical outer dimensions and is intended to be inserted into a barrel (not shown) having a cylindrical inner wall. The feed ram consists of three separate parts. In the assembled state, the mixing element 1 is arranged inside the cylinder and serves to mix the content of the cylinder. For this purpose, the mixing element 1 is movable in the longitudinal direction of the cylinder on the mixing rod 2 and is rotatable about the mixing rod 2 as an axis of rotation.

[0101] The dosing plunger comprises an outer sterile plunger 3 which forms the part of the dosing plunger adjacent to the mixing element 1 . A sterile plunger 3 is arranged on top of the mixing element 1 . Sanitizing plunger 3 in Figure 4 are displayed individually. The sealing plunger 4 is arranged in and on the sterilization pl...

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Abstract

The invention relates to a device for mixing and dispensing a pasty mass, in particular a bone cement, comprising a cartridge that is open or can be opened on two ends and has a mixing element and a feed plunger arranged in it, whereby the feed plunger, in a starting position, is arranged in the region of a first cartridge end, the mixing element is arranged on a mixing rod, the mixing rod extends through the feed plunger into the inside of the cartridge, the mixing rod and the feed plunger and the cartridge together form a tight connection that seals the cartridge inside of the device with respect to the exterior, whereby the feed plunger is arranged on the mixing rod and such that it can move in the cartridge in axial direction and whereby at least one clamping jaw is arranged on the feed plunger in appropriate manner such that the clamping jaw can be pressed onto the mixing rod by means of a locking element such that the mixing rod can no longer be shifted with respect to the feed plunger. The invention also relates to a bone cement system comprising a device of this type and a method for producing a cement mixture, in particular of a bone cement, having a device of this type or a bone cement system of this type.

Description

technical field [0001] The invention relates to a device for mixing and dispensing pasty substances, especially bone cement. Furthermore, the invention relates to a bone cement system comprising a device of this type, as well as a method of making a cement mixture, in particular a bone cement, with a device of this type or a bone cement system of this type. Background technique [0002] The polymethyl methacrylate (PMMA) bone cement is based on the pioneering work of Mr. Charnley. PMMA bone cement consists of liquid monomer components and powder components. The monomer component generally comprises a monomer, methyl methacrylate and an activator (N,N-dimethyl-p-toluidine) dissolved therein. The powder component, also known as bone cement powder, consists of one or more polymers produced by polymerization, preferably suspension polymerization, based on methyl methacrylate and copolymerized monomers monomers such as styrene, methyl acrylate or similar monomers, radiopaques,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F13/00B01F15/02B01F15/00A61B17/88B01F27/93
CPCA61B17/8827A61B17/8833A61B2017/8838B01F31/40B01F33/50112B01F35/3202B01F35/7164B01F35/754251B01F2101/20B29B7/80
Inventor S·福格特
Owner HERAEUS MEDICAL
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