EP3801404A1 - Progressives auslenkungselement, herstellungsverfahren dazu sowie verwendung - Google Patents
Progressives auslenkungselement, herstellungsverfahren dazu sowie verwendungInfo
- Publication number
- EP3801404A1 EP3801404A1 EP19734670.3A EP19734670A EP3801404A1 EP 3801404 A1 EP3801404 A1 EP 3801404A1 EP 19734670 A EP19734670 A EP 19734670A EP 3801404 A1 EP3801404 A1 EP 3801404A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- columns
- deflection element
- elements
- backbone
- progressive deflection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/16—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
- A61L27/165—Rubbers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/18—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/507—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials for artificial blood vessels
Definitions
- the invention relates to a progressive deflection element according to the main claim and a manufacturing method according to the independent claim and further to a use of the progressive deflection element.
- EP 2 416 030 B1 discloses a non-linear deflection behavior of springs, an elastomeric spring element with a progressive spring characteristic being described here, wherein the element has a planar design and features and cuts, the geometry of these cuts being suitable for influencing the spring characteristic is.
- US 2003/0055496 A1 proposes a vascular prosthesis with nonlinear elastic behavior, in which the nonlinear elastic behavior is caused by textile entanglements of the outer layer. From the medical point of view very desirable non-linear elastic behavior, but in the system limits are set by the geometry and size of the textile entanglements.
- a layer applied to a support layer is protected, which is able to increase the strength under the influence of an external force, said effect referred to as "strain stiffening" is., Wherein the layer has columns on the surface
- the present invention has for its object to provide a progressive deflection element, which has two spring constants, these areas should be formed linearly.
- the progressive deflection element with at least two different ones
- the backbones / backbones and the elements / columns are formed of an elastomer or a material with entropy-elastic properties
- the elements / columns are mutually movable or away from each other, which can touch when moving each other.
- Backbone basically the framework, and the columns (pillars) or elements, which are usually arranged in blocks.
- At least two columns should always be arranged in a block, so that they can touch each other in a contact area when force is applied.
- the maximum number of columns is not defined.
- the columns should always be made higher than they are wide.
- the depth of the columns and the backbones, so the entire structure is arbitrary, in particular can be as elongated progressive deflection elements hersutz.
- bodies are produced which have a basic shape and are subsequently extruded into the "depth". Since the bodies behave linearly with increasing depth, the depth dimension plays only a subordinate to no role.
- the frameworks / backbones should be made more stable by their dimensioning than the elements / pillars.
- the thickness of the backbone should always be chosen so that more force is needed to deform it than is needed to bend all of the pillars of the block held together by the backbones.
- the elastomer can in particular be selected from:
- HTV silicones can also be used
- TPE thermoplastic elastomers
- UV-crosslinking polymers can also be used, these being useful for certain processes.
- the elastomer used is chemically unchanged if it is to be used for medical purposes and thus also materials with special approvals for special applications, such as FDA or TÜV approvals for implants or general medical devices can be used.
- at least three basic frameworks / backbones can be provided, in particular with symmetrically designed progressive deflection elements, wherein these are arranged in different planes. For this purpose, reference is made, for example, to the embodiment variant in FIGS. 1 and 2.
- the disclosure is a progressive deflection element, which under the action of a pulling force shows a non-linear, but progressive expansion.
- the material is adjustably soft, so that it comes under the action of a pulling force to a large linear expansion, which is followed by a region in which the force and the deflection no longer behave linearly, Material becomes increasingly stiffer. At the end point of this range there follows again a linear dependence of the expansion with the force, whereby the material is now much stiffer than at the beginning.
- the progressive deflection element according to the invention comprises the corresponding pillars and corresponding backbones of entropy-elastic material, wherein the progressive deflection element is formed in one piece in a particularly preferred embodiment.
- strain stiffening The external force action of increasing strength is known in the art as "strain stiffening.”
- Corresponding progressive deflection elements according to the invention can now offer better replacement than simple materials with only a linear elasticity behavior.
- the progressive deflection element according to the invention is constructed of entropy-elastic material.
- the rigidity of the progressive deflection element according to the invention can be over the entire range according to the method also according to the invention by selecting and tuning the parameters: elasticity of the material, dimensioning of
- the manufacturing method of a progressive deflection element comprises the steps of: 1) setting the characteristic / spring constant depending on the later application; 2) selection of the length and height / dimensions of the elements / pillars and the backbone / backbone based on the total dimensions given by the subsequent application;
- step 4) can be carried out with the aid of FEM simulations, these FEM simulations being known in the prior art.
- the production of the mold in step 5) may preferably be carried out by means of lithography or 3D printing processes.
- step 5) b) can be done by means of milling, cutting, blasting or lasing.
- the 3D printing of the progressive deflection element is also possible.
- At least one of the following parameters can be varied:
- the progressive deflection element can in particular be manufactured entirely from an entropy-elastic material, in particular in one piece.
- the determination of the parameters: elasticity of the material, dimensioning of the backbone, thickness of the deflection element, dimensioning of the columns and distance between the columns are to be selected or calculated according to the use or application of the progressive deflection element.
- some columns may have a smaller distance from one another than other columns, so that a plurality of pillar regions are formed in which premature or only later contacts take place under the pillars.
- Variation options here are very diverse and can be adapted to the respective requirements. The most interesting case, however, is likely to be the combination of the two linear regions.
- Finding the preferred characteristic of the finished material as determined by the application. Find out the preferred dimensions of the finished material, which is also determined by the application, namely ultimately, how large the component should be in the end, namely, for example, 1 m, 10 cm or 200 pm. Selection of an elastomer with an modulus of elasticity which is at least equal to the final spring constant of the material, the final stiffness or spring constant always corresponding at most to the stiffness of the selected material.
- the requirements to be considered here are in particular:
- the material should be an elastomer or, in general, a material with entropy-elastic behavior, and the material should inherently have a linear behavior within the scope of the required deflection.
- the following factors are to be selected in particular, namely number of columns, width of the columns, distance of the columns, thickness of the backbone, which data are preferably determined by FEM simulation can.
- Magnitude depends. In the micrometer range, for example, a lithography process would be useful to produce a mold, whereas on very large scales, the material could be laser cut from a plate.
- a mold made of an aluminum block can first be milled out.
- a two-component RTV silicone according to the manufacturer, For example, Wacker Elastosil RT625 be prepared, which can then first degas, preferably under vacuum, so that no more air bubbles are included.
- the material is cured in the oven at 70 ° C for about one hour, after which the sample can be removed from the mold.
- Water jet cutting can be applied from plate goods.
- the 3D printing is possible, and this is an interesting application for TPE or UV-vulcanizing silicones.
- progressive deflection element As a particular preferred use of the progressive deflection element or manufactured according to a manufacturing process, in particular the application in the field of orthotics and vascular prosthetics can be seen, wherein such progressive deflection elements as part of a prosthesis, orthosis or as a blood vessel or vascular prosthesis corresponding
- Fig. 1 is a schematic representation of a first embodiment of the
- inventive progressive deflection element 1 in a uniaxial design in a symmetrical design
- FIG. 2 shows a schematic representation of the exemplary embodiment according to FIG. 1 under load by a pulling force
- Fig. 3 is a schematic representation of a second embodiment of the
- inventive progressive deflection element 1 in a circular formation for radial deflections.
- Fig. 1 is a schematic representation of a first embodiment of the
- inventive progressive deflection element 1 shown in a uniaxial design in a symmetrical design.
- the progressive deflection element 1 consists of at least two backbones, namely a first basic framework 21 and a second basic framework 22 and linearly formed columns or elements 3.
- Backbone 23 shown, so that there is a symmetrical design.
- the entire unit of the progressive deflection element 1 is the recording or
- the progressive deflection element 1 is manufactured in one piece from an elastomer.
- a possible application here is, for example, the arrangement in a knee brace, namely to limit the knee movement, so that a bending of the knee is initially possible until the columns touch 3 and then quasi a blocking effect with increased resistance, ie changed spring constant, so that only a small amount of movement is possible, which ultimately ends in a stop in the kinking of the knee.
- Fig. 2 shows a schematic representation of the embodiment of Figure 1 when loaded by a pulling force F.
- the material shows the softer linear behavior up to the first contact in region B, this being the first linear region.
- another area is formed in which, due to the increase in the contact points, the spring constant increases, this area representing the non-linear area.
- the spring constant of the backbones 21, 22, 23 is reached and these are then stretched, this being the second linear region. This is also the reason why the backbones 21, 22, 23 must be dimensioned so that they deform later.
- FIG. 3 is a schematic representation of a second embodiment of the
- Progressive deflection element 1 shown in a uniaxial design in asymmetrical design.
- This design is unsymmetrical way is suitable for the production of chains, wherein the number of blocks with columns 3 between 1 and infinitely variable.
- FIG. 4 shows a schematic representation of a third exemplary embodiment of the invention
- inventive progressive deflection element 1 in a circular formation for radial deflections.
- the interlinked blocks of FIG. 3 are connected in a circle, so that now an interior is formed which extends (with a corresponding elongated extension of the backbones 21, 22 and the columns / elements 3 (in the depth of the drawing) quasi forming a tube.
- This exemplary embodiment represents the application for a blood vessel, so that this synthetic blood vessel can expand to a certain degree of expansion and then counteracts the force acting radially outwards from the interior through the blood to be pumped or flowing.
- Standard sample Backbone 5mm, column width 2.1mm, distance between columns 0.5mm, depth of sample 10mm, number of columns 10, length of columns 10mm
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Epidemiology (AREA)
- Veterinary Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- Dermatology (AREA)
- Public Health (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Botany (AREA)
- Prostheses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018113642.0A DE102018113642B4 (de) | 2018-06-07 | 2018-06-07 | Progressives Auslenkungselement, Herstellungsverfahren dazu sowie Verwendung |
| PCT/DE2019/100465 WO2019233521A1 (de) | 2018-06-07 | 2019-05-27 | Progressives auslenkungselement, herstellungsverfahren dazu sowie verwendung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3801404A1 true EP3801404A1 (de) | 2021-04-14 |
Family
ID=67137489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19734670.3A Pending EP3801404A1 (de) | 2018-06-07 | 2019-05-27 | Progressives auslenkungselement, herstellungsverfahren dazu sowie verwendung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3801404A1 (de) |
| DE (1) | DE102018113642B4 (de) |
| WO (1) | WO2019233521A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3133545A1 (de) | 1981-08-25 | 1983-03-10 | WOCO Franz-Josef Wolf & Co, 6483 Bad Soden-Salmünster | Elastomerschlaufe |
| US6562069B2 (en) | 2001-09-19 | 2003-05-13 | St. Jude Medical, Inc. | Polymer leaflet designs for medical devices |
| DE10321800A1 (de) | 2003-05-14 | 2004-12-09 | Muhr Und Bender Kg | Wellfelder mit stufenweise progressiver Federkennlinie |
| DE102009036869A1 (de) | 2009-08-10 | 2011-02-17 | SGF SüDDEUTSCHE GELENKSCHEIBENFABRIK GMBH & CO. KG | Vorrichtung zum Aufhängen einer schwingenden Last, insbesondere für eine Abgasanlage eines Kraftfahrzeugs |
| DE102010033419A1 (de) | 2010-08-04 | 2012-02-09 | Grammer Aktiengesellschaft | Horizontfedereinrichtung für Fahrzeugsitze mit Elastomerfederelement mit progressiver Federkennlinie |
| US9708434B2 (en) * | 2010-10-01 | 2017-07-18 | University Of Tennessee Research Foundation | Multigraft copolymers as superelastomers |
| DE102016107480B4 (de) * | 2016-04-22 | 2018-01-04 | Christian-Albrechts-Universität Zu Kiel | Schicht mit variabler Festigkeit |
-
2018
- 2018-06-07 DE DE102018113642.0A patent/DE102018113642B4/de active Active
-
2019
- 2019-05-27 EP EP19734670.3A patent/EP3801404A1/de active Pending
- 2019-05-27 WO PCT/DE2019/100465 patent/WO2019233521A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019233521A1 (de) | 2019-12-12 |
| DE102018113642B4 (de) | 2020-05-28 |
| DE102018113642A1 (de) | 2019-12-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3237764B1 (de) | Strukturierte oberfläche mit stufenweise schaltbarer adhäsion | |
| DE102008037204A1 (de) | Platte zur Fixierung von Knochenfragmenten | |
| EP3248635B1 (de) | Komponente für eine spritze sowie spritze | |
| EP0983752A2 (de) | Stent | |
| WO1996019952A2 (de) | Platzhalter zum anordnen in einer körperröhre | |
| EP3442673B1 (de) | Muskeltrainer und verfahren zu dessen herstellung | |
| DE10050970A1 (de) | Stent | |
| WO2016146792A1 (de) | Komposit-pillarstrukturen | |
| DE102011104026B4 (de) | Nachgiebiger Fluidantrieb zur Erzeugung einer nahezu exakten bidirektionalen Schraubenbewegung und dazugehöriges Verfahren | |
| DE3836744A1 (de) | Verfahren zur herstellung von formkoerpern durch verformen eines aushaertbaren materials und vorrichtung zur durchfuehrung des verfahrens | |
| DE102016118605A1 (de) | Retraktor mit Puzzleverbindung | |
| EP3349926B1 (de) | Stempelwerkzeug einer sinterpresse und verfahren hierzu | |
| EP3801404A1 (de) | Progressives auslenkungselement, herstellungsverfahren dazu sowie verwendung | |
| DE102008048417A1 (de) | Medizinische Vorrichtung | |
| EP1437173A1 (de) | Statischer Mischer für hochviskose Medien | |
| EP3445415B1 (de) | Schicht mit variabler festigkeit | |
| EP2389522B1 (de) | Elatische kupplung | |
| EP4404872B1 (de) | Ophthalmologisches implantat mit unterschiedlich steifen oberflächenbereichen | |
| DE102020106418A1 (de) | Vorrichtung zum Aufbringen von Kräften auf eine Umgebung | |
| WO2024133131A1 (de) | Verfahren und vorrichtung zum herstellen eines objektes | |
| EP4125717B1 (de) | Intraokularlinse | |
| WO2018095502A1 (de) | Schuh, insbesondere sportschuh, und verfahren zu seiner herstellung | |
| DE102022134523A1 (de) | Verfahren und Vorrichtung zum Herstellen einer Wandung eines Objektes | |
| DE9303681U1 (de) | Abformelement | |
| DE102012202797B4 (de) | Dynamisches Bewegungselement eines Wirbelsäulenimplantates |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20201209 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| AX | Request for extension of the european patent |
Extension state: BA ME |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: UNIVERSITAET HEIDELBERG |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20240417 |