WO1996022749A1 - Device for stabilizing jounts of the limbs - Google Patents

Device for stabilizing jounts of the limbs Download PDF

Info

Publication number
WO1996022749A1
WO1996022749A1 PCT/HU1996/000004 HU9600004W WO9622749A1 WO 1996022749 A1 WO1996022749 A1 WO 1996022749A1 HU 9600004 W HU9600004 W HU 9600004W WO 9622749 A1 WO9622749 A1 WO 9622749A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
hinge
indentations
protrusions
elements
Prior art date
Application number
PCT/HU1996/000004
Other languages
French (fr)
Inventor
Róbert MEZO^'
Original Assignee
Mezo Robert
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 Mezo Robert filed Critical Mezo Robert
Priority to EP96901084A priority Critical patent/EP0805660A1/en
Priority to US08/875,626 priority patent/US5823979A/en
Priority to AU44948/96A priority patent/AU4494896A/en
Publication of WO1996022749A1 publication Critical patent/WO1996022749A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
    • A61F5/01—Orthopaedic devices, e.g. splints, casts or braces
    • A61F5/04—Devices for stretching or reducing fractured limbs; Devices for distractions; Splints
    • A61F5/05—Devices for stretching or reducing fractured limbs; Devices for distractions; Splints for immobilising
    • A61F5/058—Splints
    • A61F5/05841—Splints for the limbs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
    • A61F5/01—Orthopaedic devices, e.g. splints, casts or braces
    • A61F5/0102—Orthopaedic devices, e.g. splints, casts or braces specially adapted for correcting deformities of the limbs or for supporting them; Ortheses, e.g. with articulations
    • A61F2005/0132—Additional features of the articulation
    • A61F2005/0158—Additional features of the articulation with locking means

Definitions

  • the present invention relates to a device for stabilizing joints of the limbs, consisting of supporting rods attached to the limbs, a hinge between the rods, two coaxial hinge elements and a locking element.
  • latch-joint is constructed in a way, that an element of the latch, which is connected to one part of the joint, can be inserted into a slot of the other part of the joint so that it can be fixated in a given position.
  • the latch can be disconnected by pulling the latch, which is secured by a spring, out of the slot, thus making movement of the joints possible.
  • the described system called the Hessing apparatus, is still used today as an improvement of the so called Hoffa-band [dr. Gyula Dollinger: "Inflammation, rigidity and shrinkage of the hip joints” ( pages 60-62)].
  • the described systems share a common problem: they do not offer an entirely satisfying degree of safety. This way the users, people already greatly hindered in their movement, are even more prone to injury. Another great drawback is, because the devices are machined or precision cast from metal, that they are heavy and have a very small supporting area, thus wearing-out very quickly. Due to the wear they also become even less safe.
  • the object of the present invention is to eliminate the mentioned problems and to provide a simple, safe and wear resistant design which can stabilize the injured or healing joints.
  • the invention is a device comprising two rods to be secured to the limb, said rods being connected by a hinge consisting of two elements arranged on a common shaft and a locking element, wherein the mating faces of the hinge elements are provided with perpendicular protrusions and indentations, respectively.
  • the indentations are of the same shape as the protrusions and the contours of both the protrusions and the indentations are other than rings coaxial with the shaft; one of the hinge elements is arranged on the shaft to rotate freely, the other hinge element is fitted onto an outer thread on said shaft, meanwhile the locking element is firmly anchored on the shaft.
  • the hinge elements are preferably discs, wherein the protrusions on one disc are trapezoid shaped parallel ribs, while the indentations on the other disc are grooves of the same shape and arrangement.
  • the discs may be of circular shape and made of plastics and the shaft may be made of metal.
  • the locking element is a lever and the shaft is provided with a multiple coarse pitch square thread.
  • one of the hinge elements can be moved from the other one by way of the locking element, so that there is a distance between the elements that usually are in contact with each other this way ensuring independent movement of the two elements.
  • the elements are moved again to contact each other, they can not rotate with respect to each other as the protrusions and the indentations are mating each other.
  • the basis for the invention is the fact that the moving parts of the device are put out to a lot less stress if the fixation isn't done on the small peripherial surfaces of the elements, but on the larger area of the front surfaces. Accordingly, locking does not occure in a radial direction but in a plane perpendicular thereof.
  • This design not only reduces the stress and thus the wear to the joints, but makes the device a lot safer in the locked position, and it's use easier. The chances of accidents are minimalized, which is crucial in serving it's purpose.
  • Fig. 1 is a perspective view of the device
  • Fig. 2 is a perspective view of the hinge;
  • Fig. 3 is a cross section of the fastened joint illustrated in Figure 2 and
  • Fig. 4 is a cross section of the hinge illustrated in figure 3, in a position the elements can rotate.
  • Figure 1 shows the device in use, fastened to a limb.
  • the rods 1 are fastened to the limb 2 above and below the knee of the user and are connected by hinge 3.
  • the hinge 3 is locked in the shown position, thus the rods 1 and hinge 3 create a single rigid unit.
  • Figure 2 shows the midsection of the device consisting of the hinge 3 with elements 4 and 5 and a shaft 6 with a lever 7 as locking element.
  • Figures 3 and 4 show the details of the trapezoid shaped mateble ribs 8 and slots 9 of the hinge elements 4 and 5, respectively.
  • the ribs 8 and grooves 9 that run across the mating faces of the hinge elements 4 and 5 are parallel with the diameter of the hinge elements.
  • Hinge element 4 is fitted onto the shaft 6 so it can rotate freely and is supported by rim 10.
  • hinge element 5 The central bore in hinge element 5 is threaded corresponding to the outer thread of shaft 6. This way when lever 7 is turned, element 4 can recess and the mating grooves 9 and ribs 8 prevent possible rotation of the hinge elements.
  • Shaft 6 is preferably provided with a multiple coarse pitch square thread. This way hinge element 5 can recess, by a slight turn of lever 7, from the other hinge element 4. At this time the rods 1 can move freely, and the leg shown on Figure 1 can be bent in order to sit down. Hinge elements 4 and 5 of the joint can mate, in a similar way, by turning the lever 7 in the opposite direction.
  • the present invention may be applied in many different ways and the scope of the invention is not to be taken as limited by the description of the above preferred specific device. It is obvious that the locking lever can be substituted by a dial or any other structural element.
  • the joints do not have to consist of discs, grooves and ribs, but other connecting configurations my also be used.
  • the threaded shaft can also be manufactured as a seperate unit.

Landscapes

  • Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Nursing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Rehabilitation Tools (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)

Abstract

The device according to the invention is comprising two rods to be secured to the limb, said rods being connected by a hinge consisting of two elements arranged on a common shaft and a locking element. The mating faces of the hinge elements (4, 5) are provided with perpendicular protrusions and indentations, respectively, wherein the indentations are of the same shape as the protrusions and the contours of both the protrusions and the indentations are other than rings coaxial with the shaft (6); one of the hinge elements (4) is arranged on the shaft (6) to rotate freely, the other hinge element (5) is fitted onto an outer thread on said shaft (6), meanwhile the locking element is firmly anchored on the shaft (6).

Description

DEVICE FOR STABILIZING JOINTS OF THE LIMBS
The present invention relates to a device for stabilizing joints of the limbs, consisting of supporting rods attached to the limbs, a hinge between the rods, two coaxial hinge elements and a locking element.
Under a number of conditions there is a need to stabilize a joint of the limbs. Often following illness or surgery the joints connecting the limbs cannot be stressed sufficiently. In other cases following surgery, involving amputation of the limbs, the connection of the prostheses must be constructed to produce a movement similar to that of the original joint of the limb. In both cases the device is constructed - with the recovery of the patient in mind - so, that when needed (for instance when sitting down), adjustment of the joint is possible, meanwhile giving ample support to the limb when fastened.
These devices are most commonly constructed so that two rods are joined with a so called latch-joint or hinge, making it possible for the two rods to be fixated in a given position. The latch-joint is constructed in a way, that an element of the latch, which is connected to one part of the joint, can be inserted into a slot of the other part of the joint so that it can be fixated in a given position. The latch can be disconnected by pulling the latch, which is secured by a spring, out of the slot, thus making movement of the joints possible.
The described system, called the Hessing apparatus, is still used today as an improvement of the so called Hoffa-band [dr. Gyula Dollinger: "Inflammation, rigidity and shrinkage of the hip joints" ( pages 60-62)].
Another common method is described by 1994-95 catalogue of the German - Otto Bock orthopaedic and aid-device manufacturer. The apparatus shown on the 48th page has the rods stabilizing the paralysed limb, connected by a hinge. Relative movement of the joint is controlled by a arm that inserts for stabalization, or removes for movement a wedge.
The described systems share a common problem: they do not offer an entirely satisfying degree of safety. This way the users, people already greatly hindered in their movement, are even more prone to injury. Another great drawback is, because the devices are machined or precision cast from metal, that they are heavy and have a very small supporting area, thus wearing-out very quickly. Due to the wear they also become even less safe. The object of the present invention is to eliminate the mentioned problems and to provide a simple, safe and wear resistant design which can stabilize the injured or healing joints.
Accordingly, the invention is a device comprising two rods to be secured to the limb, said rods being connected by a hinge consisting of two elements arranged on a common shaft and a locking element, wherein the mating faces of the hinge elements are provided with perpendicular protrusions and indentations, respectively. The indentations are of the same shape as the protrusions and the contours of both the protrusions and the indentations are other than rings coaxial with the shaft; one of the hinge elements is arranged on the shaft to rotate freely, the other hinge element is fitted onto an outer thread on said shaft, meanwhile the locking element is firmly anchored on the shaft.
The hinge elements are preferably discs, wherein the protrusions on one disc are trapezoid shaped parallel ribs, while the indentations on the other disc are grooves of the same shape and arrangement.
The discs may be of circular shape and made of plastics and the shaft may be made of metal.
Preferably, the locking element is a lever and the shaft is provided with a multiple coarse pitch square thread. With this device, one of the hinge elements can be moved from the other one by way of the locking element, so that there is a distance between the elements that usually are in contact with each other this way ensuring independent movement of the two elements. When the elements are moved again to contact each other, they can not rotate with respect to each other as the protrusions and the indentations are mating each other.
The basis for the invention is the fact that the moving parts of the device are put out to a lot less stress if the fixation isn't done on the small peripherial surfaces of the elements, but on the larger area of the front surfaces. Accordingly, locking does not occure in a radial direction but in a plane perpendicular thereof. This design not only reduces the stress and thus the wear to the joints, but makes the device a lot safer in the locked position, and it's use easier. The chances of accidents are minimalized, which is crucial in serving it's purpose.
The details of the invention are shown in the accompanying drawings, in which:
Fig. 1 is a perspective view of the device;
Fig. 2 is a perspective view of the hinge; Fig. 3 is a cross section of the fastened joint illustrated in Figure 2 and
Fig. 4 is a cross section of the hinge illustrated in figure 3, in a position the elements can rotate.
Figure 1 shows the device in use, fastened to a limb. The rods 1 are fastened to the limb 2 above and below the knee of the user and are connected by hinge 3. The hinge 3 is locked in the shown position, thus the rods 1 and hinge 3 create a single rigid unit.
Figure 2 shows the midsection of the device consisting of the hinge 3 with elements 4 and 5 and a shaft 6 with a lever 7 as locking element. Figures 3 and 4 show the details of the trapezoid shaped mateble ribs 8 and slots 9 of the hinge elements 4 and 5, respectively. The ribs 8 and grooves 9 that run across the mating faces of the hinge elements 4 and 5 are parallel with the diameter of the hinge elements. Hinge element 4 is fitted onto the shaft 6 so it can rotate freely and is supported by rim 10.
The central bore in hinge element 5 is threaded corresponding to the outer thread of shaft 6. This way when lever 7 is turned, element 4 can recess and the mating grooves 9 and ribs 8 prevent possible rotation of the hinge elements.
Shaft 6 is preferably provided with a multiple coarse pitch square thread. This way hinge element 5 can recess, by a slight turn of lever 7, from the other hinge element 4. At this time the rods 1 can move freely, and the leg shown on Figure 1 can be bent in order to sit down. Hinge elements 4 and 5 of the joint can mate, in a similar way, by turning the lever 7 in the opposite direction.
Naturally, the present invention may be applied in many different ways and the scope of the invention is not to be taken as limited by the description of the above preferred specific device. It is obvious that the locking lever can be substituted by a dial or any other structural element. The joints do not have to consist of discs, grooves and ribs, but other connecting configurations my also be used. The threaded shaft can also be manufactured as a seperate unit.

Claims

1. Device for supporting the joints of limbs, comprising two rods to be secured to the limb, said rods being connected by a hinge consisting of two elements arranged on a common shaft and a locking element, characterized in that the mating faces of the hinge elements (4, 5) are provided with perpendicular protrusions and indentations, respectively, wherein the indentations are of the same shape as the protrusions and the contours of both the protrusions and the indentations are other than rings coaxial with the shaft (6); one of the hinge elements (4) is arranged on the shaft (6) to rotate freely, the other hinge element (5) is fitted onto an outer thread on said shaft (6), meanwhile the locking element is firmly anchored on the shaft (6).
2. The device as claimed in claim 1. characerized in that the hinge elements (4, 5) are discs, wherein the protrusions on one disc (5) are trapezoid shaped parallel ribs (8), while the indentations on the other disc are grooves (9) of the same shape and arrangement.
3. The device as claimed in claim 2, characterized in that the discs are of circular shape and made of plastic.
4. The device as claimed in any of claims 1-3 characterized in that the shaft (6) is made of metal.
5. The device as claimed in any of claims 1-4 characterized in that the locking element is a lever (7).
6. The device as claimed in any of claims 1-5 characterized in that the shaft (6) is provided with a multiple coarse pitch thread.
7. The device as claimed in claim 6, caracterized in that the thread is a square thread.
PCT/HU1996/000004 1995-01-24 1996-01-24 Device for stabilizing jounts of the limbs WO1996022749A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP96901084A EP0805660A1 (en) 1995-01-24 1996-01-24 Device for stabilizing jounts of the limbs
US08/875,626 US5823979A (en) 1995-01-24 1996-01-24 Device for stabilizing joints of the limbs
AU44948/96A AU4494896A (en) 1995-01-24 1996-01-24 Device for stabilizing jounts of the limbs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HUP9500207 1995-01-24
HU9500207A HU215016B (en) 1995-01-24 1995-01-24 Fixating device for diarthrosis of limbs

Publications (1)

Publication Number Publication Date
WO1996022749A1 true WO1996022749A1 (en) 1996-08-01

Family

ID=10986191

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/HU1996/000004 WO1996022749A1 (en) 1995-01-24 1996-01-24 Device for stabilizing jounts of the limbs

Country Status (6)

Country Link
US (1) US5823979A (en)
EP (1) EP0805660A1 (en)
AU (1) AU4494896A (en)
CA (1) CA2210003A1 (en)
HU (1) HU215016B (en)
WO (1) WO1996022749A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2507157A (en) * 2012-08-15 2014-04-23 Nat Health Service Commissioning Board Device for hip support

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AU2004212942A1 (en) 2003-02-14 2004-09-02 Depuy Spine, Inc. In-situ formed intervertebral fusion device
AU2006279558B2 (en) 2005-08-16 2012-05-17 Izi Medical Products, Llc Spinal tissue distraction devices
US8366773B2 (en) 2005-08-16 2013-02-05 Benvenue Medical, Inc. Apparatus and method for treating bone
US8591583B2 (en) 2005-08-16 2013-11-26 Benvenue Medical, Inc. Devices for treating the spine
US8105382B2 (en) 2006-12-07 2012-01-31 Interventional Spine, Inc. Intervertebral implant
WO2008103832A2 (en) * 2007-02-21 2008-08-28 Benvenue Medical, Inc. Devices for treating the spine
US8900307B2 (en) 2007-06-26 2014-12-02 DePuy Synthes Products, LLC Highly lordosed fusion cage
CA2710142A1 (en) 2008-01-17 2009-07-23 Beat Lechmann An expandable intervertebral implant and associated method of manufacturing the same
WO2009124269A1 (en) 2008-04-05 2009-10-08 Synthes Usa, Llc Expandable intervertebral implant
US8535327B2 (en) 2009-03-17 2013-09-17 Benvenue Medical, Inc. Delivery apparatus for use with implantable medical devices
US9526620B2 (en) 2009-03-30 2016-12-27 DePuy Synthes Products, Inc. Zero profile spinal fusion cage
US9393129B2 (en) 2009-12-10 2016-07-19 DePuy Synthes Products, Inc. Bellows-like expandable interbody fusion cage
US9592063B2 (en) 2010-06-24 2017-03-14 DePuy Synthes Products, Inc. Universal trial for lateral cages
US8979860B2 (en) 2010-06-24 2015-03-17 DePuy Synthes Products. LLC Enhanced cage insertion device
WO2012003175A1 (en) 2010-06-29 2012-01-05 Synthes Usa, Llc Distractible intervertebral implant
US9402732B2 (en) 2010-10-11 2016-08-02 DePuy Synthes Products, Inc. Expandable interspinous process spacer implant
US9522070B2 (en) 2013-03-07 2016-12-20 Interventional Spine, Inc. Intervertebral implant
US10085783B2 (en) 2013-03-14 2018-10-02 Izi Medical Products, Llc Devices and methods for treating bone tissue
US10034783B1 (en) * 2013-12-17 2018-07-31 University Of South Florida Adjustable prosthetic ankles
US11426290B2 (en) 2015-03-06 2022-08-30 DePuy Synthes Products, Inc. Expandable intervertebral implant, system, kit and method
CN109688980B (en) 2016-06-28 2022-06-10 Eit 新兴移植技术股份有限公司 Expandable and angularly adjustable intervertebral cage with articulation joint
CN109688981A (en) 2016-06-28 2019-04-26 Eit 新兴移植技术股份有限公司 Distensible, adjustable angle intervertebral cage
US10888433B2 (en) 2016-12-14 2021-01-12 DePuy Synthes Products, Inc. Intervertebral implant inserter and related methods
US10398563B2 (en) 2017-05-08 2019-09-03 Medos International Sarl Expandable cage
US11344424B2 (en) 2017-06-14 2022-05-31 Medos International Sarl Expandable intervertebral implant and related methods
US10940016B2 (en) 2017-07-05 2021-03-09 Medos International Sarl Expandable intervertebral fusion cage
US11446156B2 (en) 2018-10-25 2022-09-20 Medos International Sarl Expandable intervertebral implant, inserter instrument, and related methods
US11426286B2 (en) 2020-03-06 2022-08-30 Eit Emerging Implant Technologies Gmbh Expandable intervertebral implant
US11850160B2 (en) 2021-03-26 2023-12-26 Medos International Sarl Expandable lordotic intervertebral fusion cage
US11752009B2 (en) 2021-04-06 2023-09-12 Medos International Sarl Expandable intervertebral fusion cage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545843A (en) * 1949-08-30 1951-03-20 Cohan Henry Hinged joint for leg braces
US4054130A (en) * 1975-12-29 1977-10-18 Paul William Franke Emergency splint assembly
US4848326A (en) * 1988-06-20 1989-07-18 Robert Lonardo Knee contracture correction device

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
SE357580B (en) * 1972-08-22 1973-07-02 Loennstroem Oy

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545843A (en) * 1949-08-30 1951-03-20 Cohan Henry Hinged joint for leg braces
US4054130A (en) * 1975-12-29 1977-10-18 Paul William Franke Emergency splint assembly
US4848326A (en) * 1988-06-20 1989-07-18 Robert Lonardo Knee contracture correction device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2507157A (en) * 2012-08-15 2014-04-23 Nat Health Service Commissioning Board Device for hip support

Also Published As

Publication number Publication date
CA2210003A1 (en) 1996-08-01
AU4494896A (en) 1996-08-14
EP0805660A1 (en) 1997-11-12
HU215016B (en) 1998-08-28
HU9500207D0 (en) 1995-03-28
HUT74551A (en) 1997-01-28
US5823979A (en) 1998-10-20

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