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DE725400C - Ankle for artificial legs - Google Patents

Ankle for artificial legs

Info

Publication number
DE725400C
DE725400C DEW109421D DEW0109421D DE725400C DE 725400 C DE725400 C DE 725400C DE W109421 D DEW109421 D DE W109421D DE W0109421 D DEW0109421 D DE W0109421D DE 725400 C DE725400 C DE 725400C
Authority
DE
Germany
Prior art keywords
spring
foot
ankle
artificial
joint
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.)
Expired
Application number
DEW109421D
Other languages
German (de)
Inventor
Dipl-Ing Friedrich Wieland
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DEW109421D priority Critical patent/DE725400C/en
Application granted granted Critical
Publication of DE725400C publication Critical patent/DE725400C/en
Expired legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50Prostheses not implantable in the body
    • A61F2/60Artificial legs or feet or parts thereof
    • A61F2/66Feet; Ankle joints
    • A61F2/6607Ankle joints
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50Prostheses not implantable in the body
    • A61F2002/5072Prostheses not implantable in the body having spring elements
    • A61F2002/5073Helical springs, e.g. having at least one helical spring
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50Prostheses not implantable in the body
    • A61F2/60Artificial legs or feet or parts thereof
    • A61F2/66Feet; Ankle joints
    • A61F2002/6614Feet

Landscapes

  • Health & Medical Sciences (AREA)
  • Transplantation (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Description

Fußgelenk für Kunstbeine Die Erfindung betrifft ein Fußgelenk für Kunstbeine mit einer den Unterschenkel mit dem Fuß verbindenden Feder als Ersatz eines Achsen- oder Kugelgelenkes.Ankle joint for artificial legs The invention relates to an ankle joint for Artificial legs with a spring connecting the lower leg to the foot as a replacement an axle or ball joint.

Es ist schon versucht worden, an Stelle der Achsen- oder Kugeigelenke bei Fußprothesen die Verbindung zwischen Unterschenkel und Fuß durch eine Druckfeder herzustellen, um ein nachgiebiges Abbiegen des Fußes nach allen Seiten hin zu ermöglichen. Diese Druckfedern, die zwar scheinbar ein angeneQlmes, elastisches Aufsetzen des Kunstbeines erzielen, bringen aber andererseits mit sich, daß sich das Kunstbein bei der Belastung durch das Körpergewicht beim Gehen im Ausmaß des Federweges verkürzt. Es muß also demgegenüber entsprechend länger gehalten werden, was dann aber beim Vorziehen des Kunstbeines zu unangenehmem Schlürfen führt. Attempts have already been made to replace the axle or ball joints in the case of prosthetic feet, the connection between the lower leg and the foot by means of a compression spring to allow the foot to flex in a flexible manner in all directions. These compression springs, although apparently a pleasant, elastic attachment of the Achieve artificial leg, but on the other hand bring with it that the artificial leg when the body weight is exerted when walking, the extent of the spring deflection is shortened. In contrast, it must be held correspondingly longer, but what then is the Pulling the artificial leg forward leads to uncomfortable slurping.

Ferner ist es zur Vermeidung dieses Längerwerdens bei der elastischenFußbefestigung schon bekanntgeworden, den Fuß durch ein in der Schenkel achse starres Kugelgelenk entsprechend dem Knöchelgelenk anzuhängen. die Beweglichkeit dieses Gelenkes aber durch ein rings um das Kugelgelenk gelegte Gummipolster elastisch zu begrenzen. Das Fußgelenk nach der Erfindung bietet zur Erzielung der gleichen Wirkung einen wesentlich einfacheren Weg, der damit auch zu einer leichteren Konstruktion führt. Die Gewichtsersparnis ist aber bekanntermaßen bei Kunstgliedern ein dringendes Erfordernis. Furthermore, in order to avoid this lengthening, the elastic foot fastening is used already known, the foot through a ball joint that is rigid in the thigh axis to be attached according to the ankle joint. the mobility of this joint, however to be elastically limited by a rubber pad placed around the ball joint. The ankle joint according to the invention offers one to achieve the same effect much easier way, which also leads to a lighter construction. However, it is known that weight saving is an urgent requirement for artificial limbs.

Das Fußgelenk nach der Erfindung geht wieder von der Federverbindung zwischen Fuß und Unterschenkel aus, wobei sie den aufgezeigten Nachteil der bekannten Ausführung dadurch vermeidet, daß die das Gelenk bildende Feder als Zugfeder mit dicht aufeinanderliegenden Federwindungen ausgebildet ist. Eine derartige Feder nimmt das Körpergewicht starr auf; sie braucht demnach nicht wie bei dem bekannten Vorschlag so stark zu sein, daß sie das ganze Körpergewicht federnd aufnimmt. Die Feder wird vielmehr zweckmäßig so bemessen, daß das Abbiegen gerade mit der Kraft erfolgt, die von Natur aus zur Verfügung steht, daß aber eine weitere Bewegung durch Anwachsen der Federkraft begrenzt ist und daß außerdem der Fuß nach Beendigung der seitlichen Belastung in die Streekstellung zurtickgefiihl t wird. The ankle joint according to the invention is based on the spring connection between the foot and lower leg, with the noted disadvantage of the known Execution thereby avoids that the spring forming the joint is used as a tension spring spring coils lying close to one another is formed. Such a feather rigidly absorbs the body weight; therefore it does not need as with the known one Suggestion to be so strong that it absorbs the whole body weight resiliently. the Rather, the spring is expediently dimensioned in such a way that the bending just takes place with the force takes place, which is available by nature, but that another movement through Increase in the spring force is limited and that also the foot after completion of the lateral load is felt back in the straight position.

Auf der Zeichnung ist der Erfindungsgegenstand beispielsweise dargestellt, und zwar zeigt: Abb. 1 die beispielsweise Anordnung des Federgelenkes nach der Erfindung in einem Kunstbein, Abb. 2 das Federgelenk allein in abgebogenem Zustande. The subject of the invention is shown in the drawing, for example, namely: Fig. 1 shows the example of the arrangement of the spring hinge according to the invention in an artificial leg, Fig. 2, the spring joint alone in a bent state.

Das Federgelenk besteht aus der kurzen Schraubenfeder dz, deren Enden auf zwei Flauschstücke b, c aufgebracht sind, zweckmäßigerweise durch Aufschrauben der Draht windungen, wie in Abb. 2 dargestellt. Die Flauschstücke werden mit Schraubenbolzen d,e gegen Grundplatten in den Prothesenteilen befestigt. Um das Verdrehen der Flanschen und damit der Feder zu verhindern, sind zwei dicht nebeneinanderstehende Schraubenbolzen vorgesehen, oder es wird ein mit einem Vierkantfuß versehener Schraubenbol7en genommen. Die Feder a ist, wie ersichtlich, als Zugfeder mit dicht aufeinanderliegenden Drahtwindungen ausgebildet, so daß die Prothesenteile zu bestimmter Gesamtlänge miteinander verbunden sind. Eine seitlich ausknickende Belastung des Kunstbeines führt demnach nur, wie in Abb. 2 angedeutet, zu einem einseitigen Abheben der Drahtwindungen, d. h. zu einem Abbiegen der Federmitte. The spring joint consists of the short helical spring dz, the ends of which are applied to two fleece pieces b, c, expediently by screwing the wire coils as shown in Fig. 2. The fleece pieces are fastened with screw bolts d, e fastened against base plates in the prosthesis parts. About twisting the flanges and thus to prevent the spring, there are two tightly spaced screw bolts provided, or a screw bolt provided with a square foot is used. The spring a is, as can be seen, as a tension spring with tightly stacked wire windings designed so that the prosthesis parts are connected to one another to a certain total length are. A laterally buckling load on the artificial leg therefore only leads to how indicated in Fig. 2, to a one-sided lifting of the wire windings, d. H. to turning the center of the spring.

Die Begrenzung der Fußabwinkelmig ist durch die zunehmende Federkraft gegeben. Es können daher gegebenenfalls die bei Kunstbeinen iiblichen Gummipuffer zwischen Fuß- und Schenkelteil in Fortfall kommen.The limitation of the Fußabwinkelmig is due to the increasing spring force given. The rubber buffers customary for artificial legs can therefore be used if necessary between the foot and thigh parts are eliminated.

Claims (1)

PATENTANSPRUCH: Fußgelenk für Kunstbeine mit einer den Unterschenkel mit dem Fuß verbindenden Feder als Ersatz eines Acshsen- oder Kugelgetenkes, dadurch gekennzeichnet, daß die das Gelenk bildende Feder als Zugfeder mit dicht aufeinanderliegenden Federwindungen ausgebildet ist. PATENT CLAIM: Ankle joint for artificial legs with a lower leg with the spring connecting the foot as a replacement for an axis or ball joint, thereby characterized in that the spring forming the hinge as a tension spring with tightly lying one on top of the other Spring coils is formed.
DEW109421D 1941-08-03 1941-08-03 Ankle for artificial legs Expired DE725400C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEW109421D DE725400C (en) 1941-08-03 1941-08-03 Ankle for artificial legs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW109421D DE725400C (en) 1941-08-03 1941-08-03 Ankle for artificial legs

Publications (1)

Publication Number Publication Date
DE725400C true DE725400C (en) 1942-09-21

Family

ID=7617013

Family Applications (1)

Application Number Title Priority Date Filing Date
DEW109421D Expired DE725400C (en) 1941-08-03 1941-08-03 Ankle for artificial legs

Country Status (1)

Country Link
DE (1) DE725400C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4619661A (en) * 1982-03-05 1986-10-28 Robert Axelsson Prosthesis foot

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4619661A (en) * 1982-03-05 1986-10-28 Robert Axelsson Prosthesis foot

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