GB2177925A - Adjustable ankle connector for artificial leg - Google Patents
Adjustable ankle connector for artificial leg Download PDFInfo
- Publication number
- GB2177925A GB2177925A GB08518170A GB8518170A GB2177925A GB 2177925 A GB2177925 A GB 2177925A GB 08518170 A GB08518170 A GB 08518170A GB 8518170 A GB8518170 A GB 8518170A GB 2177925 A GB2177925 A GB 2177925A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shin
- foot
- connector
- ankle
- ankle base
- 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.)
- Withdrawn
Links
- 210000003423 ankle Anatomy 0.000 title claims abstract description 29
- 210000002683 foot Anatomy 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000004677 Nylon Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 210000003414 extremity Anatomy 0.000 abstract description 5
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- A61F2/00—Filters 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
- A61F2/50—Prostheses not implantable in the body
- A61F2/60—Artificial legs or feet or parts thereof
- A61F2/66—Feet; Ankle joints
-
- 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
- A61F2/00—Filters 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
- A61F2/50—Prostheses not implantable in the body
- A61F2/76—Means for assembling, fitting or testing prostheses, e.g. for measuring or balancing, e.g. alignment means
-
- 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
- A61F2/00—Filters 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
- A61F2/50—Prostheses not implantable in the body
- A61F2/60—Artificial legs or feet or parts thereof
- A61F2/66—Feet; Ankle joints
- A61F2/6607—Ankle joints
-
- 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
- A61F2/00—Filters 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
- A61F2/50—Prostheses not implantable in the body
- A61F2/60—Artificial legs or feet or parts thereof
- A61F2/66—Feet; Ankle joints
- A61F2002/6614—Feet
Abstract
An ankle base (14) is attached to the foot (12), an attachment (38) for shin member (36) is pivoted at 46 above the ankle base and travelling screw control means (32, 34) is rotatable to set the angle of the shin member (36) relative to the foot (12). The user of the limb can himself alter the control means (32, 34) to set the angle of the connector according to the heel height of the shoes that he is wearing. <IMAGE>
Description
SPECIFICATION
Adjustable ankle connector for artificial leg
The present invention relates to an adjustable ankle connector for an artificial leg.
In the manufacture of artificial legs, it is necessary to set the angle between the shin part and the foot according to the heel height of the user. U.K. Patent
No. 1371996 (Blatchford) describes an arrangement that permits the angle between the foot and the shin to be set at a predetermined angle within a relatively limited range, the angle being defined by means of a rigid wedge inserted between the confronting faces of the shin and the foot. U.K. Patent No. 2027592 (Hanger) discloses another adjustment device that enables a wider range of angular travel so that the same foot can be used for a man's shoe or for a woman's fashion shoe, but again either the confronting surfaces of the foot and shin have to be formed to the desired angle or a wedge defining the desired angle has to be inserted.
It is an object of the invention to provide an ankle connector that provides adjustment of the angle between the shin and the foot but is simple to make and allows the angle to be varied by the user of the limb so that he can himself conveniently adjust the angle to suit different shoes that he may be wearing at different times.
Broadly stated the invention comprises an adjustable connector for connecting a shin and foot of an artificial leg comprising an ankle base attached to the foot, an attachment for a shin member pivoted above the ankle base and travelling screw control means rotatable to set the angle of the shin member relative to the foot.
More specifically the invention provides an adjustable connector for connecting a shin and foot of an artificial leg, comprising:
an ankle base attached to the foot;
a locating bolt held captive on the ankle base and having a traveller threadedly engaged thereon so that rotation of the bolt moves the traveller along an anterior- posterior line;
support means upstanding from the ankle base; and
a shin connector pivoted to the support means and having a follower arm that depends below the pivot and locates on the traveller so that adjustment of the position of the traveller along the bolt sets an angular relationship between the shin and the foot.
Because the bolt and traveller are above the foot, the connector can be used with both solid ankle cushion heel feet and uniaxial feet and the angle of the foot can be adjusted without removing the shoe.
The bolt may be formed with a socket for a screwdriver or Allen key that may be inserted e.g.
through a hole formed in the cosmesis of an endoskeletal limb, and the user simply has to turn the bolt by means of the screwdriver or Allen key to adjust the angle of the foot.
An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawing in which:~
Figure 1 is a diagrammatic partly sectioned view of a shin and ankle of an artificial leg fitted with an adjustable base stem according to the invention; and
Figure 2 is a side view of a spigot and lower part of the shin tube of the ankle of Figure 1.
In the drawings, a shin part 10 of an artificial leg is fitted to a uniaxial foot 12 by means of an adjustable base stem 14 and an ankle base 16. The upper face of the ankle base 16 and lower face of the adjustable base stem have toothed sockets to accommodate a differentially toothed alignment disc 18, as described in our Patent No. GB-B-20801 14. The base stem 14 is formed with a platform 20 that makes face to face contact with the ankle base 16 and upstanding medial and lateral lugs 22 of generally triangular profile spaced a small distance apart in the medial-lateral plane. Between the lugs 22 are provided short anterior and posterior retainer walls 24 that are apertured to accept an adjustment bolt 28. A retainer nut 30 holds the bolt 28 captive and the head 32 of the bolt is recessed to accept a driving member such as an Allen key.A barrel 34 is internally threaded to run on the bolt 28 an moves in the anterior or posterior direction as the bolt 28 is rotated.
At the lower end of the shin tube 36 is provided a spigot 38 which is flanged at 40 and has an upper section which is a sliding fit with the shin tube 36 to which it is retained by pins 42. Depending from the flange 38 is a follower arm 44 that fits between the lugs 22 to which it is pivoted by pin 46 for pivoting movement in the anterior-posterior plane from an upward to a rearwardly inclined attitude. A recess 48 of part circular profile is provided to hold the follower arm 44 to the barrel 34, and the tip of the arm 44 is relieved to either side of the recess 48 to allow the arm 44 to move in a posterior direction from its upright attitude. Thereby rotation of the bolt 28 is effective to alter the inclination of the shin tube 36 relative to the ankle base 10 and hence to the foot 12 and thereby the heel height of the foot can be adjusted. The range of travel that can be obtained is about 10~12 degrees corresponding to a range of heel heights of about 9 mm to 55 mm. Furthermore, if the cosmesis 50 is apertured to permit access to the head 32 the user of the limb can adjust the heel height personally so that he does not have to return to a limb fitting centre to change the angle of his foot to accommodate different types of shoe.
The base stem 14 including the spigot 38 may advantageously be moulded in nylon especially carbon fibre filled nylon 66 or similar plastics material. The follower arm 44 is thereby conveniently in compression against the barrel 34 so that variations in the spacing therebetween as the barrel 34 travels linearly and the arm 44 rotates can be taken up in the resilience of the material.
Claims (1)
1. An adjustable connector for connecting a shin and foot of an artificial leg comprising an ankle base attached to the foot, an attachment for a shin member pivoted above the ankle base and travelling screw control means rotatable to set the angle of the shin member relative to the foot.
2. An adjustable connector for connecting a shin and foot of an artificial leg, comprising:
an ankle base attached to the foot;
a locating bolt held captive on the ankle base and having a traveller threadedly engaged thereon so that rotation of the bolt moves the traveller along an anterior- posterior line;
support means upstanding from the ankle base; and
a shin connector pivoted to the support means and having a follower arm that depends below the pivot and locates on the traveller so that adjustment of the position of the traveller along the bolt sets an angular relationship between the shin and the foot.
3. A connector according to Claim 2, wherein the locating bolt passes through and is held captive between anterior and posterior retaining walls on the ankle base.
4. A connector according to Claim 2 or 3, wherein the support means comprises medial and lateral lugs on the ankle base between which the shin connector is supported by means of a pivot pin received in the lugs.
5. A connector according to any of Claims 2,3 or 4, wherein the traveller is of circular profile and locates in a complementary socket at the base of the follower arm.
6. A connector according to any of Claims 2-5, wherein the ankle base and/or the shin connector are of plastics material.
7. A connector according to Claim 6, wherein the connector and the ankle base are moulded in nylon reinforced with carbon fibres.
8. A connector according to any of Claims 2-7, wherein the shin connector is formed with an upwardly directed spigot that is a push fit into an endoskeletal shin tube.
9. An adjustable connector for connecting a shin and foot of an artificial leg substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Amendments to the claims have been filed, and have the following effect:~
(a) Claim 1 above have been deleted or textually amended.
(b) New or textually amended claims have been filed as follows:-
1. An adjustable connector for connecting a shin and part of an artificial leg comprising an ankle base attached to the foot, an attachment for a shin member pivoted above the ankle base and travelling screw control means carrying a traveller that sets the angle of the shin member relative to the foot as the screw control means is rotated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08518170A GB2177925A (en) | 1985-07-18 | 1985-07-18 | Adjustable ankle connector for artificial leg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08518170A GB2177925A (en) | 1985-07-18 | 1985-07-18 | Adjustable ankle connector for artificial leg |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8518170D0 GB8518170D0 (en) | 1985-08-21 |
| GB2177925A true GB2177925A (en) | 1987-02-04 |
Family
ID=10582485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08518170A Withdrawn GB2177925A (en) | 1985-07-18 | 1985-07-18 | Adjustable ankle connector for artificial leg |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2177925A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5156630A (en) * | 1991-05-09 | 1992-10-20 | Rampro, Inc. | Ankle joint prosthesis fixable in more than one orientation |
| US5800564A (en) * | 1995-09-18 | 1998-09-01 | Gelineau; Roger | Ankle prosthesis with angle adjustment |
| WO2019007678A1 (en) * | 2017-07-04 | 2019-01-10 | Ottobock Se & Co. Kgaa | Prosthesis and prosthetic foot adapter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB188922A (en) * | 1921-10-28 | 1922-11-23 | Nehemiah James Henry Kenney | Improvements in and relating to artificial legs |
| GB1494706A (en) * | 1975-02-21 | 1977-12-14 | Hanger & Co Ltd J E | Alignment device for artificial limbs |
| GB2092451A (en) * | 1980-03-03 | 1982-08-18 | Blatchford Chas A & Sons Ltd | Improvements in artificial limbs |
| US4446580A (en) * | 1981-06-09 | 1984-05-08 | Keiai Orthopedic Appliance Co., Ltd. | Prosthetic foot structure |
| GB2163961A (en) * | 1984-09-03 | 1986-03-12 | Blatchford & Sons Ltd | Improved artificial foot |
-
1985
- 1985-07-18 GB GB08518170A patent/GB2177925A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB188922A (en) * | 1921-10-28 | 1922-11-23 | Nehemiah James Henry Kenney | Improvements in and relating to artificial legs |
| GB1494706A (en) * | 1975-02-21 | 1977-12-14 | Hanger & Co Ltd J E | Alignment device for artificial limbs |
| GB2092451A (en) * | 1980-03-03 | 1982-08-18 | Blatchford Chas A & Sons Ltd | Improvements in artificial limbs |
| US4446580A (en) * | 1981-06-09 | 1984-05-08 | Keiai Orthopedic Appliance Co., Ltd. | Prosthetic foot structure |
| GB2163961A (en) * | 1984-09-03 | 1986-03-12 | Blatchford & Sons Ltd | Improved artificial foot |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5156630A (en) * | 1991-05-09 | 1992-10-20 | Rampro, Inc. | Ankle joint prosthesis fixable in more than one orientation |
| US5800564A (en) * | 1995-09-18 | 1998-09-01 | Gelineau; Roger | Ankle prosthesis with angle adjustment |
| WO2019007678A1 (en) * | 2017-07-04 | 2019-01-10 | Ottobock Se & Co. Kgaa | Prosthesis and prosthetic foot adapter |
| EP3939549A1 (en) * | 2017-07-04 | 2022-01-19 | Ottobock SE & Co. KGaA | Prosthesis and prosthetic foot adapter |
| US11559411B2 (en) | 2017-07-04 | 2023-01-24 | Ottobock Se & Co. Kgaa | Prosthesis and prosthetic foot adapter |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8518170D0 (en) | 1985-08-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |