US3823424A - Artificial leg with stable link-type knee joint - Google Patents

Artificial leg with stable link-type knee joint Download PDF

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Publication number
US3823424A
US3823424A US33675973A US3823424A US 3823424 A US3823424 A US 3823424A US 33675973 A US33675973 A US 33675973A US 3823424 A US3823424 A US 3823424A
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United States
Prior art keywords
links
pivots
leg
pivot points
shin
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Expired - Lifetime
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D May
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HANGER J AND CO Ltd
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HANGER J AND CO Ltd
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Priority to US33675973 priority patent/US3823424A/en
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    • 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
    • A61F2/64Knee joints
    • A61F2/642Polycentric joints, without longitudinal rotation
    • A61F2/644Polycentric joints, without longitudinal rotation of the single-bar or multi-bar linkage type

Abstract

The invention provides an artificial knee joint comprised by two parts of links joining a stump socket portion to a shin portion in such a manner as to impart stability to the joint over initial flexure from the upright, such stability being derived from an initial rise in the effective center of rotation.

Description

United States Patent i191 May [ ARTIFICIAL LEG WITH STABLE LINK-TYPE KNEE JOINT [75] Inventor: Denis Ronald William May, London,

England [7 3] Assignee: J. E. Hanger and Company Limited,

, London, England v [22] Filed: Feb. 28, 1973 [2]] Appl. No.: 336,759

Related US. Application Data [63] Continuation-impart of Ser. No. 229,318, Feb. 25,

1972, abandoned.

[52] US. Cl. 3/22 [51] Int. Cl. A6lf 1/04, A6lf 1/08 [5 8] Field of Search 3/22-29, 2, 3/12 [56] References Cited FOREIGN PATENTS OR APPLICATIONS l66,l0l 6/1950 Austria 3/29 [451] July 16, 1974 OTHER PUBLICATIONS Orthopaedic Appliances Atlas, Vol. 2, Artificial Limbs, by J. W. Edwards, Ann Arbor, Mich, 1960, pages 190,251 & 252 (FIG. 5. 145 on page 251 relied upon).

Primary ExaminerRichard A. Gaudet Assistant Examiner-Ronald L. Frinks Attorney, Agent, or Firm-Imirie and Smiley [5 7] ABSTRACT The invention provides an artificial knee joint comprised by two parts of links joining a stump socket portion to a shin portion in such a manner as to impart stability to the joint over initial :flexure from the upright, such'stability being derived from an initial'rise in the effective center of rotation.

3 Claims, 5 Drawing Figures PATENTED JUL 1 61974 SHEH 1 BF 3 PATENTED JUL 3 74 SHEU 3 0f 3 ARTIFICIAL LEG WITH STABLE LINK-TYPE KNEE JOINT CROSS-REFERENCE TO RELATED APPLICATION This application is a continuation-in-part of application Ser. No. 229,318, filed Feb. 25, 1972 and now abandoned.

BACKGROUND OF THE INVENTION SUMMARY OF THE INVENTION According to the invention, an artificial leg having an upper leg stump socket portion and a skin portion in which a rearwardly and downwardly sloped plate within the shin portion is connected to a substantially horizontal plate at the base of the socket portion by two pairs of pivoted links, of which the links of a forward pair are shorter than those of a rearward pair, and which together form an articulation between the said portions whose instantaneous center of rotation (the intersection point of a line drawn through the pivot points of a forward link and a line drawn through the pivot points of a rearward link) lies upon an ascending curve for a predetermined angle of relative rotation between the two portions of the leg from the fully extended position. The resultant articulated joint provides a stable weight support until it has been flexed through the predetermined angle from the extended position, which may be about Preferably the joint should be capable of flexure through more than a right angle, say 120, to permit a natural sitting posture. To this end both the forward and rearward links are preferably cranked rearwardly from about their mid points to avoid mutual interference. Springs and/or friction or hydraulic gait-control mechanism may be incorporated in the joint in a manner familiar to those skilled in the art. Likewise, alteration of the lengths of the links and of their pivot points can be made to adapt the characteristics of the joint to suit the individual stump condition of a patient. However, it has been found that the angulation between lines intersecting the pivot axes of the linksis critical.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevation of the knee section of an artificial leg in the extended position;

FIG. 2 is a similar view of the leg in fully flexed position;

FIG. 3 is a rear elevation of the leg in extended position;

FIG. 4 shows the locus of the instantaneous center of rotation when a socket portion moves relative to a stationary shin portion and vice versa, and

FIG. 5 shows the derivation of pointsD and E shown in FIG. 4.

DETAILED DESCRIPTION OF TI-IE DRAWINGS The shin portion 1 of the artifical leg embodies a tubular load-bearing member 2 attached to a casting 3. A plate 4 incorporating upwardly extending lug portions 5 and 6 is screwed to the upper face of the casting 3. The stump socket portion of the leg is carried by a substantially horizontal plate 7, screwed to which are lugs 8 and 9. A dished fairing plate 10 is slotted for the passage of two pairs of pivoted links 11 and 12 secured that of the rearward links 12 is 3% inch.

The rearward slope of the line joining the lower pivot points in the lugs 5 and 6 is about and the line joining the upper pivot points in the lugs 8 and 9 gives a forward slope of about 15. The locus of the instantaneous center of rotation upon commencement of flexure of the upper leg socket portion relative to the shin portion in this example rises from a point about 4% inch above the level of the rear lower pivot bolt 13 by about I inch before beginning to descend.

Lines drawn through the pivot points of the forward links subtend an angle of 41 with the vertical when the leg is fully extended, subtend angles of 79 with the lines joining the two pivot points on the shin, subtend angles of 146 with the lines joining the pivot points on the socket portion and in that the lines joining the pivot points of the rear links subtend angles of 53 with the said lines joining the pivots on the shin portion.

The stated angles are found in practice to be absolutely vital. In an experiment, moving the pivot points one at a time by a mere 1/16 inch (equivalent to an average change of included angle of about 0.5") was found to producequite unacceptable loss of function. Gapping at the knee between fairing plate It) and the front upper edge of the shin casing occurred, the maximum degree of flexion was reduced and there was a tendency for angular movement to become locked.

In FIGS. 4 and 5 the socket portion of the artificial leg is shown in broken lines, upright and flexed through 40 and (FIG. 4) and through and (FIG. 5). The abscissa of the bold lines drawn through the pivot points of the links 11 and 12 are marked A, B, C, D and E and show the precise locus of the instantaneous center of rotation corresponding to the upright and given angles of flexure. The locus of the instantaneous center of rotation, assuming a stationary socket pair of pivoted links, the links of said forward pair being shorter than the links of said rearward pair, said forward and rearward pairs of links connected to said horizontal plate and to said sloped plate by pivots, the pivots on said sloped plate being spaced apart by more than twice the distance separating the pivots on said horizontal plate, with the pivots on said horizontal plate disposed at intermediate positions relative to the horizontal positions of the pivots on said sloped plate when the leg is in a fully extended position, said pairs of links jointly forming an articulation between said socket and shin portions and having an instantaneous center of rotation constituted by the intersection point of a line drawn through the pivot points of a forward link and a line drawn through the pivot points of a rearward link, said center of rotation being located in substantially the region of that of a natural knee and lying upon a curve which is ascending through approximately 15 of relative rotation between said socket and shin portions of the leg from the fully extended position, said articulation exhibiting flexure exceeding to enable natural sitting posture,

2. An artificial leg according to claim 1, in which said links are curved such that end portions are disposed rearwardly of central portions thereof.

3. An artifical leg according to claim 1, wherein said pivots are disposed so that lines drawn through the pivot points of the forward links subtend an angle of 41 with the vertical when the leg is fully extended, subtend angles of 79 with the lines joining the two pivot points on the shin, subtend angles of 146 with the lines joining the pivot points on the socket portion and in that the lines joining the pivot points of the rear links subtend angles of 53 with the said lines joining the pivots on the shin portion.

Claims (3)

1. An artificial leg comprising an upper leg stump socket portion and a shin portion in which a rearwardly and downwardly sloped plate within the shin portion is connected to a substantially horizontal plate at the base of the socket portion by a forward pair and a rearward pair of pivoted links, the links of said forward pair being shorter than the links of said rearward pair, said forward and rearward pairs of links connected to said horizontal plate and to said sloped plate by pivots, the pivots on said sloped plate being spaced apart by more than twice the distance separating the pivots on said horizontal plate, with the pivots on said horizontal plate disposed at intermediate positions relative to the horizontal positions of the pivots on said sloped plate when the leg is in a fully extended positiOn, said pairs of links jointly forming an articulation between said socket and shin portions and having an instantaneous center of rotation constituted by the intersection point of a line drawn through the pivot points of a forward link and a line drawn through the pivot points of a rearward link, said center of rotation being located in substantially the region of that of a natural knee and lying upon a curve which is ascending through approximately 15* of relative rotation between said socket and shin portions of the leg from the fully extended position, said articulation exhibiting flexure exceeding 90* to enable natural sitting posture.
2. An artificial leg according to claim 1, in which said links are curved such that end portions are disposed rearwardly of central portions thereof.
3. An artifical leg according to claim 1, wherein said pivots are disposed so that lines drawn through the pivot points of the forward links subtend an angle of 41* with the vertical when the leg is fully extended, subtend angles of 79* with the lines joining the two pivot points on the shin, subtend angles of 146* with the lines joining the pivot points on the socket portion and in that the lines joining the pivot points of the rear links subtend angles of 53* with the said lines joining the pivots on the shin portion.
US33675973 1972-02-25 1973-02-28 Artificial leg with stable link-type knee joint Expired - Lifetime US3823424A (en)

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US22931872A true 1972-02-25 1972-02-25
US33675973 US3823424A (en) 1972-02-25 1973-02-28 Artificial leg with stable link-type knee joint

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Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178642A (en) * 1976-11-18 1979-12-18 J. E. Hanger & Company Limited Knee joint structure for artificial legs
US4215442A (en) * 1977-09-28 1980-08-05 Chas. A. Blatchford & Sons Limited Multi-bar linkage knee with fixed rotation axis
US4268923A (en) * 1980-01-17 1981-05-26 Lamberto Staffieri Thigh prosthesis
US4310932A (en) * 1978-09-27 1982-01-19 Naeder Max Artificial knee-joint
US4312080A (en) * 1980-07-23 1982-01-26 Regents Of University Of California Modular knee finishing block and method of finishing an artificial limb
US4361142A (en) * 1981-08-20 1982-11-30 Northwestern University Knee orthosis and joint construction therefor
US4371990A (en) * 1979-01-18 1983-02-08 Lamberto Staffieri Thigh prosthesis
US4523585A (en) * 1983-10-03 1985-06-18 Lamb Steve R Anatomic fracture brace for the knee
EP0243081A2 (en) * 1986-04-16 1987-10-28 J.E. HANGER & COMPANY LIMITED Artificial knee with improved stable link-type knee joint
USRE33621E (en) * 1983-10-03 1991-06-25 Anatomic brace fracture for the knee
US5060640A (en) * 1990-03-14 1991-10-29 Becker Orthopedic Appliance Company Knee brace
WO1992015264A1 (en) * 1991-03-06 1992-09-17 Townsend Jeffrey H Multiaxis controlled motion knee brace with a four bar joint and method for producing same
US5181931A (en) * 1990-01-26 1993-01-26 Otto Bock Orthopaedische Industrie Besitz- und Verwaltungs-Kommanditgesel lschaft Swivel connection between two parts of an orthopedic technical aid
WO1996007378A1 (en) * 1994-09-09 1996-03-14 University Of Toledo Improved knee joint mechanism for knee disarticulation prosthesis
WO1996029031A1 (en) * 1995-03-23 1996-09-26 Universiteit Twente Leg prosthesis and knee joint for a leg prosthesis
US5800567A (en) * 1996-03-11 1998-09-01 Ohio Willow Wood Company Knee mechanism for an artificial limb
WO2001045596A1 (en) * 1999-12-21 2001-06-28 Heggemann Gmbh Multiaxis joint, especially artificial knee joint
US20040068215A1 (en) * 2002-10-08 2004-04-08 Jeremy Adelson Osteoarthritis knee brace apparatus and method
US20050149203A1 (en) * 2003-11-19 2005-07-07 Bloorview Macmillan Centre Artificial knee joint
US20050154473A1 (en) * 2004-01-13 2005-07-14 David Bassett Prosthetic knee mechanism
US20050234562A1 (en) * 2002-11-21 2005-10-20 Masahiko Okuda Prosthetic leg with knee braking function
US7507215B2 (en) 2005-07-08 2009-03-24 Jri Development Group, Llc Orthotic brace
US20140039642A1 (en) * 2012-08-01 2014-02-06 Ossur Hf Prosthetic ankle module
US8979782B2 (en) 2011-12-07 2015-03-17 Ossur Hf Hinge used for the treatment of anterior and posterior cruciate ligament injury and method for using the same
USD732167S1 (en) 2013-02-01 2015-06-16 Limbs International Inc. Prosthetic knee
USD732168S1 (en) 2013-08-19 2015-06-16 Limbs International Inc. Prosthetic knee
USD733883S1 (en) 2011-05-31 2015-07-07 Ossur Hf Prosthetic knee
US9149371B2 (en) 2012-04-05 2015-10-06 Ossur Hf Prosthetic knee
US20160158029A1 (en) * 2014-12-08 2016-06-09 Rehabilitation Institute Of Chicago Powered and passive assistive device and related methods
USD785177S1 (en) 2015-06-19 2017-04-25 Limbs International Inc. Prosthetic knee
US9730814B2 (en) 2011-05-31 2017-08-15 Ossur Hf Prosthetic knee with spring loaded latch for providing locked and unlocked configurations

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT166101B (en) *

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT166101B (en) *

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Orthopaedic Appliances Atlas, Vol. 2, Artificial Limbs, by J. W. Edwards, Ann Arbor, Mich., 1960, pages 190, 251 & 252 (FIG. 5. 145 on page 251 relied upon). *

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178642A (en) * 1976-11-18 1979-12-18 J. E. Hanger & Company Limited Knee joint structure for artificial legs
US4215442A (en) * 1977-09-28 1980-08-05 Chas. A. Blatchford & Sons Limited Multi-bar linkage knee with fixed rotation axis
US4310932A (en) * 1978-09-27 1982-01-19 Naeder Max Artificial knee-joint
US4371990A (en) * 1979-01-18 1983-02-08 Lamberto Staffieri Thigh prosthesis
US4268923A (en) * 1980-01-17 1981-05-26 Lamberto Staffieri Thigh prosthesis
US4312080A (en) * 1980-07-23 1982-01-26 Regents Of University Of California Modular knee finishing block and method of finishing an artificial limb
US4361142A (en) * 1981-08-20 1982-11-30 Northwestern University Knee orthosis and joint construction therefor
US4523585A (en) * 1983-10-03 1985-06-18 Lamb Steve R Anatomic fracture brace for the knee
USRE33621E (en) * 1983-10-03 1991-06-25 Anatomic brace fracture for the knee
EP0243081A2 (en) * 1986-04-16 1987-10-28 J.E. HANGER & COMPANY LIMITED Artificial knee with improved stable link-type knee joint
US4911709A (en) * 1986-04-16 1990-03-27 J. E. Hanger And Company Limited Artificial knee with improved stable link-type knee joint
EP0243081A3 (en) * 1986-04-16 1990-04-25 J.E. HANGER & COMPANY LIMITED Artificial knee with improved stable link-type knee joint
US5181931A (en) * 1990-01-26 1993-01-26 Otto Bock Orthopaedische Industrie Besitz- und Verwaltungs-Kommanditgesel lschaft Swivel connection between two parts of an orthopedic technical aid
US5060640A (en) * 1990-03-14 1991-10-29 Becker Orthopedic Appliance Company Knee brace
WO1992015264A1 (en) * 1991-03-06 1992-09-17 Townsend Jeffrey H Multiaxis controlled motion knee brace with a four bar joint and method for producing same
US5259832A (en) * 1991-03-06 1993-11-09 Jeffrey H. Townsend Multiaxis controlled motion knee brace with a four bar joint and method for producing same
US5330418A (en) * 1991-03-06 1994-07-19 Townsend Industries, Inc. Multiaxis controlled motion knee brace with a four bar joint and method for producing same
WO1996007378A1 (en) * 1994-09-09 1996-03-14 University Of Toledo Improved knee joint mechanism for knee disarticulation prosthesis
GB2307415A (en) * 1994-09-09 1997-05-28 Univ Toledo Improved knee joint mechanism for knee disarticulation prosthesis
DE19581773T1 (en) * 1994-09-09 1997-10-16 Univ Toledo Improved knee mechanism for a prosthesis for knee disabilities
US5746774A (en) * 1994-09-09 1998-05-05 The University Of Toledo Knee joint mechanism for knee disarticulation prosthesis
GB2307415B (en) * 1994-09-09 1998-08-12 Univ Toledo Improved knee joint mechanism for knee disarticulation prosthesis
WO1996029031A1 (en) * 1995-03-23 1996-09-26 Universiteit Twente Leg prosthesis and knee joint for a leg prosthesis
US5800567A (en) * 1996-03-11 1998-09-01 Ohio Willow Wood Company Knee mechanism for an artificial limb
US6749640B1 (en) 1999-12-21 2004-06-15 Heggemann Gmbh Multiaxis joint, especially artificial knee joint
WO2001045596A1 (en) * 1999-12-21 2001-06-28 Heggemann Gmbh Multiaxis joint, especially artificial knee joint
US20040068215A1 (en) * 2002-10-08 2004-04-08 Jeremy Adelson Osteoarthritis knee brace apparatus and method
US20050234562A1 (en) * 2002-11-21 2005-10-20 Masahiko Okuda Prosthetic leg with knee braking function
US7588604B2 (en) * 2002-11-21 2009-09-15 Nabco Limited Prosthetic leg with knee braking function
US20050149203A1 (en) * 2003-11-19 2005-07-07 Bloorview Macmillan Centre Artificial knee joint
US7087090B2 (en) 2003-11-19 2006-08-08 Bloorview Macmillan Centre Artificial knee joint
US20050154473A1 (en) * 2004-01-13 2005-07-14 David Bassett Prosthetic knee mechanism
US7507215B2 (en) 2005-07-08 2009-03-24 Jri Development Group, Llc Orthotic brace
US9730814B2 (en) 2011-05-31 2017-08-15 Ossur Hf Prosthetic knee with spring loaded latch for providing locked and unlocked configurations
USD733883S1 (en) 2011-05-31 2015-07-07 Ossur Hf Prosthetic knee
US9622899B2 (en) 2011-12-07 2017-04-18 Ossur Hf Device having hinge for treatment of anterior and posterior cruciate ligament injuries and method for using the same
US8979782B2 (en) 2011-12-07 2015-03-17 Ossur Hf Hinge used for the treatment of anterior and posterior cruciate ligament injury and method for using the same
US9149371B2 (en) 2012-04-05 2015-10-06 Ossur Hf Prosthetic knee
US9844448B2 (en) 2012-04-05 2017-12-19 Ossur Hf Prosthetic knee
US20140039642A1 (en) * 2012-08-01 2014-02-06 Ossur Hf Prosthetic ankle module
EP2879623A4 (en) * 2012-08-01 2016-05-18 Ossur Hf Prosthetic ankle module
US9439786B2 (en) * 2012-08-01 2016-09-13 össur hf Prosthetic ankle module
US10342680B2 (en) 2012-08-01 2019-07-09 Ossur Iceland Ehf Prosthetic ankle module
USD732167S1 (en) 2013-02-01 2015-06-16 Limbs International Inc. Prosthetic knee
USD732168S1 (en) 2013-08-19 2015-06-16 Limbs International Inc. Prosthetic knee
US20160158029A1 (en) * 2014-12-08 2016-06-09 Rehabilitation Institute Of Chicago Powered and passive assistive device and related methods
US10357381B2 (en) * 2014-12-08 2019-07-23 Rehabilitation Instititute of Chicago Powered and passive assistive device and related methods
USD785177S1 (en) 2015-06-19 2017-04-25 Limbs International Inc. Prosthetic knee

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