US2443356A - Flexible joint for artificial limbs - Google Patents

Flexible joint for artificial limbs Download PDF

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Publication number
US2443356A
US2443356A US65895846A US2443356A US 2443356 A US2443356 A US 2443356A US 65895846 A US65895846 A US 65895846A US 2443356 A US2443356 A US 2443356A
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Prior art keywords
foot
spring
block
joint
springs
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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 - Lifetime
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John H Mathis
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John H Mathis
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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
    • A61F2/66Feet; 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
    • A61F2002/5007Prostheses not implantable in the body having elastic means different from springs, e.g. including an elastomeric insert
    • A61F2002/5009Prostheses not implantable in the body having elastic means different from springs, e.g. including an elastomeric insert having two or more elastomeric blocks
    • 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
    • A61F2002/5079Leaf springs
    • 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

Description

June 15, 1948. J, H, MA1-H15 2,443,356 I FLEXIBLE JOINT FO ARTIFICIAL LIMBS Filed April 2, 1946 l im .Mmmm

Patented June 15, 1948 UNITED STATES PATENT vOFFICE FLEXIBLE JOINT FOR ARTIFICIAL LIMBS John H. Mathis, Temple, Tex.

Application April 2, 1946, Serial No. 658,958

2 Claims. 1

This invention relates to an artificial limb, more particularly to the ankle joint therefor.

The primary object of the invention is to provide a flexible joint between the foot and shin members of an artificial leg of such a iiexible nature that it will closely resemble the ankle joint of a human foot.

Another object is to provide a joint of such a character that it will absorb the shock of step ping or walking.

The invention will be clearly understood to those skilled in the art by reference to the accompanying drawings in which;

Figure 1 is a side elevation of the ankle and foot;

Figure 2 is a cross section of the heel as taken on line 2-2 of Figure 1.

Figure 3 is an end elevational view of the spring when not under pressure.

Figure 4 is the same as Figure 3, but showing the spring under pressure.

In the preferred form of my invention as illustrated, the shin member I and foot member 2 are connected through the medium of an intermediate block 3 by means of spring members connected to various portions of the leg and foot.

All of the springs are of the same general conguration, and a description of one will suce to describe all of the springs.

Mounted on the transverse and horizontal axis and taking the place of the ankle bone of the human foot, is a spring element 4. Referring to Figure 3, it will be noted that the spring element 4 comprises a pair of plate-like bowed members 5 and 6 with their apices adjacent. The corresponding ends of the springs 5 and 6 lie between a central triangular-shaped member 'I and a slightly larger open triangular member 8 which cverlies the ends of the members 5 and 6. Bolts 9 extend through the side legs of the triangularshaped members 'I and 8 and the ends of the springs which lie against the side faces of the members 'I and 8 thus connecting the springs to the various parts comprising the artificial foot and leg. The openings through which the bolts 9 pass are all of the same size, so that the ends of the springs 5 and 6 are held against sliding. All stress and strain upon the springs 5 and 6 are taken up by their bending action. The springs 5 and B which have been described as bowed, are more nearly oi.' a concavo-convex formation.

The spring element 4 connects the intermediate block 3 to the shin member l, and, as stated, is mounted on a transverse and horizontal axis.

Spring elements 4 and 4" connect the inter- 2 mediate block 3 to the foot 2 and are mounted in recesses provided in the two members. These elements are at right angles to the element 4 and to the front and rear of that element, but in dif ferent horizontal plane.

The intermediate block 3 is cut so that it will fit into the space formed in the foot portion 2. However, it is spaced from the shin member l. Blocks I0 and II of rubber or the like, are placed between the shin and intermediate block in the front and rear portions for the purpose of further reducing shock. A covering I2 of leather or the like, is placed over the front of the joint between the shin and intermediate block. However, the covering may be placed over the entire joint so as to prevent injury to apparel which may be placed over the foot.

A V-shaped recess I3 is formed in the foot between the instep I4 and toe portion I5. This recess has a V-shaped block of rubber I6 which is held therein by a flexible cover I1. The rubber block mounted between the instep and toe portions of the foot aid in giving flexibility to the foot when walking.

When in use, all of the springs 5 and 6 will flex to the approximate position shown in Figure 4. The springs 5 and 6 of the spring element 4 will bend on a line extending transversely and horizontally of the foot, while those of the elements 4 and 4" will bend on a line extending longitudinally of the foot. When the wearer is Walking and the foot and leg are at an acute angle to each other, the spring 5 will bend rearwardly while the spring 6 will have a tendency to straighten. This same action will occur in the element 4 and 4 depending upon the side to which the foot is rocked. Thus it will be seen that the three spring elements together with the rubber blocks I0 and II will remove all shock coincident with use of the leg.

By mounting the three springs in the manner shown, universal movement of the foot is allowed so that the ankle joint closely approximates that of the human foot. This will aid anyone in using the foot in walking on uneven surfaces.

While there is shown and described one form of the ankle joint, it is well understood by those skilled in the art that various changes may be made, which are within the scope of the appended claims.

I claim:

1. An artificial leg, a shin member and a foot member, a block interposed between the members, a spring connecting the shin member to the block and a second spring at an angle to the 3 first-named spring, connecting the block to the foot member.

2. An artificial leg comprising shin and foot members, a, block between the members, a spring connecting the shin member and the block, a 5

REFERENCES CITED The following references are of recordiin-the le of this patent:

Number Number UNITED STATES PATENTS Name Date Lewis May 29, 1883 Hagen Jan. 18, 1898 Pold Oct. 13, 1903 FOREIGN PATENTS Country Date Germany .Jan. 10, 1920

US2443356A 1946-04-02 1946-04-02 Flexible joint for artificial limbs Expired - Lifetime US2443356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US2443356A US2443356A (en) 1946-04-02 1946-04-02 Flexible joint for artificial limbs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2443356A US2443356A (en) 1946-04-02 1946-04-02 Flexible joint for artificial limbs

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US2443356A true US2443356A (en) 1948-06-15

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Application Number Title Priority Date Filing Date
US2443356A Expired - Lifetime US2443356A (en) 1946-04-02 1946-04-02 Flexible joint for artificial limbs

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Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5314499A (en) * 1991-04-04 1994-05-24 Collier Jr Milo S Artificial limb including a shin, ankle and foot
US5443528A (en) * 1992-11-17 1995-08-22 Allen; Scott Coil spring prosthetic foot
US5545234A (en) * 1991-04-04 1996-08-13 Collier, Jr.; Milo S. Lower extremity prosthetic device
US5653767A (en) * 1992-11-17 1997-08-05 Medonics, Llc Prosthetic foot
US5695527A (en) * 1992-11-17 1997-12-09 Medonics L.L.C. Coil prosthetic foot
US5746773A (en) * 1996-03-13 1998-05-05 United States Manufacturing Company C-shaped spring member for prosthetic limbs
US6120547A (en) * 1998-11-06 2000-09-19 Roland J. Christensen Enhanced prosthetic foot structure with ankle reinforcement
US20020087216A1 (en) * 1996-02-16 2002-07-04 Atkinson Stewart L. Prosthetic walking system
US6663673B2 (en) 2000-06-30 2003-12-16 Roland J. Christensen Prosthetic foot with energy transfer medium including variable viscosity fluid
US20040068327A1 (en) * 2002-10-08 2004-04-08 Christensen Roland J. Prosthetic foot with a resilient ankle
US20040068326A1 (en) * 2002-10-08 2004-04-08 Christensen Roland J. Prosthetic foot with oblique attachment
US20040068325A1 (en) * 1998-04-10 2004-04-08 Phillips Van L. Shock module prosthesis
US6805717B2 (en) 2002-10-08 2004-10-19 Roland J. Christensen, As Operating Manager Of Rjc Development, Lc, General Manager Of The Roland J. Christensen Family Limited Partnership Energy-storing prosthetic foot with elongated forefoot
US20050033450A1 (en) * 2002-10-08 2005-02-10 Christensen Roland J. Prosthetic foot with a resilient ankle
US20050071017A1 (en) * 2003-09-30 2005-03-31 Lecomte Christophe Guy Low profile active shock module prosthesis
US6875241B2 (en) 2000-06-30 2005-04-05 Roland J. Christensen, As Operating Manager Of Rjc Development Lc, General Partner Of The Roland J. Christensen Family Limited Partnership Variable resistance cell
US20050085926A1 (en) * 2003-10-21 2005-04-21 General Partner Of The Roland J. Christensen Family Limited Partnership Prosthetic foot with an adjustable ankle and method
US20050171618A1 (en) * 2000-06-30 2005-08-04 Christensen Roland J. Prosthetic foot with energy transfer including variable orifice
US20050187640A1 (en) * 2004-02-20 2005-08-25 Roland J. Christensen Prosthetic foot with cam
US20050203640A1 (en) * 2002-10-08 2005-09-15 Christensen Roland J. Prosthetic foot with a resilient ankle
US20050209707A1 (en) * 1998-04-10 2005-09-22 Phillips Van L Active shock module prosthesis
US20050216098A1 (en) * 2000-06-30 2005-09-29 Roland J. Christensen Variable resistance cell
US20060041321A1 (en) * 2003-10-21 2006-02-23 Christensen Roland J Prosthetic foot with an adjustable ankle and method
US20060229736A1 (en) * 2000-06-30 2006-10-12 Christensen Roland J Prosthetic foot with energy transfer
US20060241783A1 (en) * 2000-06-30 2006-10-26 Christensen Roland J Variable resistance cell
US20080033578A1 (en) * 2006-08-03 2008-02-07 Christensen Roland J Prosthetic foot with variable medial/lateral stiffness
US20080167731A1 (en) * 2006-12-06 2008-07-10 Christensen Roland J Prosthetic foot with longer upper forefoot and shorter lower forefoot
US20080183301A1 (en) * 2000-06-30 2008-07-31 Christensen Roland J Prosthetic foot with energy transfer
US20080188951A1 (en) * 2007-01-30 2008-08-07 Christensen Roland J Prosthetic foot with variable medial/lateral stiffness
US7462201B2 (en) 2003-10-21 2008-12-09 Freedom Innovations, Llc Prosthetic foot with an adjustable ankle and method
US20090082878A1 (en) * 2007-09-18 2009-03-26 Christensen Roland J Multi-axial prosthetic ankle
US20090265019A1 (en) * 2008-04-18 2009-10-22 Chritstensen Roland J Prosthetic foot with two leaf-springs joined at heel and toe
US20110224802A1 (en) * 2007-08-01 2011-09-15 OttoBock HealthCare LP Shock absorbing apparatus and method
US8500825B2 (en) 2010-06-29 2013-08-06 Freedom Innovations, Llc Prosthetic foot with floating forefoot keel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE318075C (en) *
US278566A (en) * 1883-05-29 Artificial leg
US597465A (en) * 1898-01-18 Artificial leg
US741411A (en) * 1902-12-04 1903-10-13 Ole Peter Rasmussen Pold Artificial leg.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE318075C (en) *
US278566A (en) * 1883-05-29 Artificial leg
US597465A (en) * 1898-01-18 Artificial leg
US741411A (en) * 1902-12-04 1903-10-13 Ole Peter Rasmussen Pold Artificial leg.

Cited By (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5314499A (en) * 1991-04-04 1994-05-24 Collier Jr Milo S Artificial limb including a shin, ankle and foot
US5545234A (en) * 1991-04-04 1996-08-13 Collier, Jr.; Milo S. Lower extremity prosthetic device
US5443528A (en) * 1992-11-17 1995-08-22 Allen; Scott Coil spring prosthetic foot
US5571213A (en) * 1992-11-17 1996-11-05 Allen; Scott Prosthetic foot
US5653767A (en) * 1992-11-17 1997-08-05 Medonics, Llc Prosthetic foot
US5695527A (en) * 1992-11-17 1997-12-09 Medonics L.L.C. Coil prosthetic foot
US20020087216A1 (en) * 1996-02-16 2002-07-04 Atkinson Stewart L. Prosthetic walking system
US5746773A (en) * 1996-03-13 1998-05-05 United States Manufacturing Company C-shaped spring member for prosthetic limbs
US20040068325A1 (en) * 1998-04-10 2004-04-08 Phillips Van L. Shock module prosthesis
US7169190B2 (en) 1998-04-10 2007-01-30 Van L. Phillips Active shock module prosthesis
US20050209707A1 (en) * 1998-04-10 2005-09-22 Phillips Van L Active shock module prosthesis
US6120547A (en) * 1998-11-06 2000-09-19 Roland J. Christensen Enhanced prosthetic foot structure with ankle reinforcement
US7572299B2 (en) 2000-06-30 2009-08-11 Freedom Innovations, Llc Prosthetic foot with energy transfer
US20040133284A1 (en) * 2000-06-30 2004-07-08 Christensen Roland J. Prosthetic foot with energy transfer medium including variable viscosity fluid
US20080183301A1 (en) * 2000-06-30 2008-07-31 Christensen Roland J Prosthetic foot with energy transfer
US7341603B2 (en) 2000-06-30 2008-03-11 Applied Composite Technology, Inc. Prosthetic foot with energy transfer including variable orifice
US20060241783A1 (en) * 2000-06-30 2006-10-26 Christensen Roland J Variable resistance cell
US6875241B2 (en) 2000-06-30 2005-04-05 Roland J. Christensen, As Operating Manager Of Rjc Development Lc, General Partner Of The Roland J. Christensen Family Limited Partnership Variable resistance cell
US6875242B2 (en) 2000-06-30 2005-04-05 Roland J. Christensen, As Operating Manager Of Rjc Development, Lc, General Partner Of The Roland J. Christensen Family Limited Partnership Prosthetic foot with energy transfer medium including variable viscosity fluid
US20060229736A1 (en) * 2000-06-30 2006-10-12 Christensen Roland J Prosthetic foot with energy transfer
US7686848B2 (en) 2000-06-30 2010-03-30 Freedom Innovations, Llc Prosthetic foot with energy transfer
US6663673B2 (en) 2000-06-30 2003-12-16 Roland J. Christensen Prosthetic foot with energy transfer medium including variable viscosity fluid
US20050216098A1 (en) * 2000-06-30 2005-09-29 Roland J. Christensen Variable resistance cell
US20050171618A1 (en) * 2000-06-30 2005-08-04 Christensen Roland J. Prosthetic foot with energy transfer including variable orifice
US20050033450A1 (en) * 2002-10-08 2005-02-10 Christensen Roland J. Prosthetic foot with a resilient ankle
US20040068327A1 (en) * 2002-10-08 2004-04-08 Christensen Roland J. Prosthetic foot with a resilient ankle
US6929665B2 (en) 2002-10-08 2005-08-16 Roland J. Christensen Prosthetic foot with a resilient ankle
US6911052B2 (en) 2002-10-08 2005-06-28 Roland J. Christensen, As Operating Manager Of Rjc Development, Lc, General Partner Of The Roland J. Christensen Family Limited Partnership Prosthetic foot with oblique attachment
US20040068326A1 (en) * 2002-10-08 2004-04-08 Christensen Roland J. Prosthetic foot with oblique attachment
US7419509B2 (en) 2002-10-08 2008-09-02 Freedom Innovations, Llc Prosthetic foot with a resilient ankle
US6805717B2 (en) 2002-10-08 2004-10-19 Roland J. Christensen, As Operating Manager Of Rjc Development, Lc, General Manager Of The Roland J. Christensen Family Limited Partnership Energy-storing prosthetic foot with elongated forefoot
US20050203640A1 (en) * 2002-10-08 2005-09-15 Christensen Roland J. Prosthetic foot with a resilient ankle
US20060004467A1 (en) * 2003-09-30 2006-01-05 Lecomte Christophe G Low profile active shock module prosthesis
US6969408B2 (en) 2003-09-30 2005-11-29 Ossur Engineering, Inc. Low profile active shock module prosthesis
US7371262B2 (en) 2003-09-30 2008-05-13 össur hf Low profile active shock module prosthesis
US20050071017A1 (en) * 2003-09-30 2005-03-31 Lecomte Christophe Guy Low profile active shock module prosthesis
US6966933B2 (en) 2003-10-21 2005-11-22 Roland J. Christensen, As Operating Manager Of Rjc Development, Lc, General Partner Of The Roland J. Christensen Family Limited Partnership Prosthetic foot with an adjustable ankle and method
US7520904B2 (en) 2003-10-21 2009-04-21 Freedom Innovations, Llc Prosthetic foot with an adjustable ankle and method
US20050085926A1 (en) * 2003-10-21 2005-04-21 General Partner Of The Roland J. Christensen Family Limited Partnership Prosthetic foot with an adjustable ankle and method
US20060041321A1 (en) * 2003-10-21 2006-02-23 Christensen Roland J Prosthetic foot with an adjustable ankle and method
US7462201B2 (en) 2003-10-21 2008-12-09 Freedom Innovations, Llc Prosthetic foot with an adjustable ankle and method
US20050187640A1 (en) * 2004-02-20 2005-08-25 Roland J. Christensen Prosthetic foot with cam
US7172630B2 (en) 2004-02-20 2007-02-06 Roland J. Christensen, As Operating Manager Of Rjc Development, Lc, General Partner Of The Roland J. Christensen Family Limited Partnership Prosthetic foot with cam
US20080033578A1 (en) * 2006-08-03 2008-02-07 Christensen Roland J Prosthetic foot with variable medial/lateral stiffness
US7618464B2 (en) 2006-08-03 2009-11-17 Freedom Innovations, Llc Prosthetic foot with variable medial/lateral stiffness
US7824446B2 (en) 2006-12-06 2010-11-02 Freedom Innovations, Llc Prosthetic foot with longer upper forefoot and shorter lower forefoot
US20080167731A1 (en) * 2006-12-06 2008-07-10 Christensen Roland J Prosthetic foot with longer upper forefoot and shorter lower forefoot
US7727285B2 (en) 2007-01-30 2010-06-01 Freedom Innovations, Llc Prosthetic foot with variable medial/lateral stiffness
US20080188951A1 (en) * 2007-01-30 2008-08-07 Christensen Roland J Prosthetic foot with variable medial/lateral stiffness
US20110224802A1 (en) * 2007-08-01 2011-09-15 OttoBock HealthCare LP Shock absorbing apparatus and method
US7794506B2 (en) 2007-09-18 2010-09-14 Freedom Innovations, Llc Multi-axial prosthetic ankle
US20090082878A1 (en) * 2007-09-18 2009-03-26 Christensen Roland J Multi-axial prosthetic ankle
US20090265019A1 (en) * 2008-04-18 2009-10-22 Chritstensen Roland J Prosthetic foot with two leaf-springs joined at heel and toe
US8034121B2 (en) 2008-04-18 2011-10-11 Freedom Innovations, Llc Prosthetic foot with two leaf-springs joined at heel and toe
US8500825B2 (en) 2010-06-29 2013-08-06 Freedom Innovations, Llc Prosthetic foot with floating forefoot keel

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