FR2658717A1 - Adjustable prosthetic foot/ankle assembly made essentially of composite material - Google Patents

Adjustable prosthetic foot/ankle assembly made essentially of composite material Download PDF

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Publication number
FR2658717A1
FR2658717A1 FR9002561A FR9002561A FR2658717A1 FR 2658717 A1 FR2658717 A1 FR 2658717A1 FR 9002561 A FR9002561 A FR 9002561A FR 9002561 A FR9002561 A FR 9002561A FR 2658717 A1 FR2658717 A1 FR 2658717A1
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FR
France
Prior art keywords
foot
prosthetic foot
sole
blade
flexible
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.)
Granted
Application number
FR9002561A
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French (fr)
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FR2658717B1 (en
Inventor
Pelisse Francois
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ADCRO SECTION CERAVAL
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ADCRO SECTION CERAVAL
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Filing date
Publication date
Application filed by ADCRO SECTION CERAVAL filed Critical ADCRO SECTION CERAVAL
Priority to FR9002561A priority Critical patent/FR2658717B1/en
Publication of FR2658717A1 publication Critical patent/FR2658717A1/en
Application granted granted Critical
Publication of FR2658717B1 publication Critical patent/FR2658717B1/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

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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
    • A61F2/76Means for assembling, fitting or testing prostheses, e.g. for measuring or balancing, e.g. alignment means
    • 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
    • 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
    • A61F2/60Artificial legs or feet or parts thereof
    • A61F2/66Feet; Ankle joints
    • A61F2002/6614Feet
    • A61F2002/6657Feet having a plate-like or strip-like spring element, e.g. an energy-storing cantilever spring keel

Abstract

The invention relates to a prosthetic foot having all the adjustment elements necessary for fitting of a leg prosthesis. It consists of a box (1) on which a lever (9) can oscillate, about the hinge pin (10), under the action of two adjusting screws (11) and (12). The lever (9) serves as a connection with the upper part of the prosthesis. Two flexible blades (3) and (5) are fixed by means of screws (2) to the box (1). A flexible sole (4) matching the inner shape of the shoe is fixed to the blade (3) with the aid of an adhesive. During walking, the forces exerted between the foot and the ground are displaced from the heel to the front of the foot, successively deforming the sole (4) and the blades (3) and (5) which, by virtue of their shape, their mode of fastening and the limit stop (6), simulate the play of the joints of the ankle and the foot. Two electric switches (14) and (15) provide information on the position of the forces applied to the foot during the bearing phase. The device according to the invention makes it possible to simulate the mechanical behaviour of the joints of the foot and the ankle during walking and running. <IMAGE>

Description

ED-CHEV I PIECE SET PROTHETIC ADJUSTABLE REALIZED
ESSENTIALLY IN COMPOSITE MATERIALS
The function of the foot is of great importance for the quality of the equipment of subjects who have lost part or all of a lower limb.

 During walking, during the support phase, the foot is in contact with the ground. All of the forces exerted between the foot and the ground admit a resultant force whose point of application moves progressively in the front of the foot which it will reach at the end of support. The law of movement of the point of application of the resultant forces exerted between the foot and the ground is well known in the healthy individual.

It has a great importance in the course of the step, so for the quality of walking. It is important that this law be reproduced by the prosthetic foot for each device.

 Achieving a prosthetic foot poses many problems when making a prosthesis. The variety of individual differences is reflected at the time of making a prosthesis by the need to be able to modify a large number of parameters of the device to match the particulars of the subject for which it is intended. These adjustment possibilities currently exist on many prosthetic dowel systems but use mechanical parts of the axes, bearings, gums which are quite heavy sets with moving parts; in use, these pieces. take the game which leads to noisy operation.

 The prosthetic foot according to the invention overcomes these disadvantages. It is. caradèrise in that it comprises a housing on which are fixed two flexible parts in the form of blades made of fiberglass composite t one of the parts being secured to the sole of the foot the other #tjrTtt intended to limit the bending bending of the foot in the end while walking. At the beginning of the support, the damping at the time of the foot-ground contact is ensured by the winding of the blade secured to the sole on the back of the metal case which is shaped like a ski spatula.

Figure t shows a side view of the invention
FIG. 2 represents a view from above of the invention
Figure 3 shows a particular embodiment of the back of the foot.

 According to the invention, the prosthetic anchor is constituted by a housing (1) preferably made of light alloy or plastic material secured by a screw system (2) or any suitable means, a fiber composite elastic blade -resine (3)> itself secured by any suitable means of a flexible sole (4).

 The screw fixing of (1) and (3) also serves to maintain a blade (5) which limits the upward movement of the blade (3) by means of an adjustment system (6) placed on the blade (3). before the blade (5). A spacer (7) placed between the blades (3) and (5), at the fastening ensures the spacing of the blades (3) and (5).

 The fiber-resin composites used for producing the elastic strips (3) and (5) are made of epoxy resins associated with glass, carbon or aramid fibers.

 The structure, shape and size of the pieces (1); (3) and (5) depend on the size, weight and activity of the subject to be paired.

 The elasticity in plantar flexion is given by the winding of the blade (3) on the rear part of the block (1) in the form of a ramp (13).

The maximum deformation of the blade (3) can be limited by an adjustable stop (8) fixed on S 1).

 A connecting piece (9) connected on one side to the upper part of the prosthesis is articulated on the housing (1) by a horizontal axis (lu).

 Two screws (il) and (t2) placed in the housing (1) at the front and rear of the shaft (allow the orientation of the connecting piece (9) in the foot profile plane. to adapt the prosthetic foot to the different curves of the shoes regardless of the height of the heel.

From the foregoing, it follows that the invention makes the following adjustments:
- adjustment of the orientation of the axis of the leg segment relative to the sole
- Choice of the position of the virtual axis of articulation of the ankle with respect to the ends of the prosthetic foot
- adjustment of the maximum bending angle
- adjustment of the maximum extension angle
- modification of the elasticity of extension
- modification of the bending elasticity.

 These different adjustment means do not require any expensive parts and allow to customize the prosthesis during its manufacture.

 Some adjustments, such as flexibility in flexion and flexibility in extension, can be modified even when the prosthesis is complete.

 The flexible sole (4) is glued to the blade (3). In this way, the modifications of the shape of the sole (4) allow the adaptation of the foot to all forms of shoes and their different heel heights by adjusting the screws (and (12).

 The described system requires only a very small distance between the lower part of the sole (4) and the upper part of the connecting piece (9). This advantage allows the use of the invention for the apparatus of lower leg amputations. Indeed, for these amputation levels where only the distal portion of the tibia had to be sacrificed most commercial prosthetic ankles are unusable, given their size.

 According to a particular embodiment, two electrical contactors can be incorporated in the system. The first electric switch (15) is placed at the rear of the foot between the housing (1) or the stop (8) integral with the housing (1) and the flexible blade (3) of the sole of the foot the second electrical contactor ( 14) is located at the front of the foot between the flexible blade (3) and (5). These contactors make it possible to generate electrical signals that can be used to control other elements of the prosthesis, for example the articulation of the knee, and also to guide the adjustment of the prosthetic foot by associating a measuring device or a recording system with the device. .

 Levolume, the weight and adaptability of this foot fully meet the requirements of the equipment of the lower limbs.

 The invention is not limited to the embodiment described and shown, but it can give rise to many variants without departing from its scope.

1) Prosthetic foot-ankle assembly easily adaptable to the anatomy and morphology of the amputee} characterized in that it comprises a housing (1) allowing adjustments in flexion-extension of the foot and the fixation of the blades flexible (3) and (5) forming spring which give the mechanical characteristics necessary to accompany the course of the step and resist the flexion-extension movements imposed on the articulation of the ankle and that of the foot during walking.

 2) prosthetic foot-peg assembly according to claim 1 wherein the elasticity of the flexion of the forefoot on the leg is provided by the play of two fiber-resin composite blades of different elasticity which are put in constraint successively during the support of the foot on the ground.

 3) prosthetic foot-peg assembly according to any one of the preceding claims wherein the plantar flexion of the foot is provided by a flexible blade which winds on a curve (13) cut in a fixing block (1).

 4) prosthetic foot-peg assembly according to any one of the preceding claims wherein the plantar flexion obtained by the device described can be limited by means of an adjustable shim (8).

 5) A prosthetic foot-peg assembly according to any one of the preceding claims wherein the orientation of the leg axis can be adjusted using screw-nut systems (12) to tilt from front to back the connecting piece (9) placed between the foot and the upper part of the prosthesis.

 6) prosthetic foot-peg assembly according to any one of the preceding claims wherein the blades (3) and (5) are made from epoxy resins and glass fibers, carbon or aramid.

 7) Prosthetic foot-peg assembly according to any one of the preceding claims wherein the flexion blades (3) and (5) are fixed together and separated by a spacer (7).

 8) prosthetic footcheville assembly according to any one of the preceding claims wherein the flexion blade (3) comes into contact with the blade (5) via an adjustment system (6) placed in front of the blade (5).

Claims (4)

  1.  9) Prosthetic foot-peg assembly according to any one of
    of the preceding claims wherein the flexion blade (3) is glued to a flexible elastomer or synthetic foam sole (4).
  2.  10) prosthetic foot-peg assembly according to any one of the preceding claims wherein the flexible blades (3) and (5) are interconnected and fixed to the block (1) in an area located towards the middle of the sole of the foot .
  3.  11) prosthetic foot-peg assembly according to any one of the preceding claims wherein an electric switch (15) is placed at the back of the foot between the flexible blade (3) and the housing (1) or the stop (8) secured to the case (1).
  4.  12) A prosthetic foot-dowel assembly according to any one of the preceding claims wherein an electric switch (1 4J is placed in front of the foot between the flexible blades (3) and (5).
FR9002561A 1990-02-26 1990-02-26 foot-ankle assembly adjustable prosthetic realized essentially in composite materials. Expired - Fee Related FR2658717B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9002561A FR2658717B1 (en) 1990-02-26 1990-02-26 foot-ankle assembly adjustable prosthetic realized essentially in composite materials.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9002561A FR2658717B1 (en) 1990-02-26 1990-02-26 foot-ankle assembly adjustable prosthetic realized essentially in composite materials.

Publications (2)

Publication Number Publication Date
FR2658717A1 true FR2658717A1 (en) 1991-08-30
FR2658717B1 FR2658717B1 (en) 1994-04-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR9002561A Expired - Fee Related FR2658717B1 (en) 1990-02-26 1990-02-26 foot-ankle assembly adjustable prosthetic realized essentially in composite materials.

Country Status (1)

Country Link
FR (1) FR2658717B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996029032A1 (en) * 1995-03-17 1996-09-26 O'byrne, Michael Prosthetic unit
US7846213B2 (en) 2004-05-28 2010-12-07 össur hf. Foot prosthesis with resilient multi-axial ankle

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8007544B2 (en) 2003-08-15 2011-08-30 Ossur Hf Low profile prosthetic foot
US7581454B2 (en) 2004-05-28 2009-09-01 össur hf Method of measuring the performance of a prosthetic foot
US8961618B2 (en) 2011-12-29 2015-02-24 össur hf Prosthetic foot with resilient heel

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE77583C (en) *
DE295807C (en) *
DE372426C (en) * 1921-10-08 1923-03-27 Anton Leisten Artificial foot
DE844041C (en) * 1950-09-15 1952-07-17 Otto Jacobi Orthopedic shoe insert for the front and metatarsals amputees
US2617115A (en) * 1949-07-25 1952-11-11 Emmett C Ellery Ankle joint for artificial legs
DE874643C (en) * 1948-03-27 1953-04-27 Leopold Franz Skokan foot prosthesis
GB738845A (en) * 1953-01-23 1955-10-19 Blatchford & Sons Ltd Artificial limb
US4328594A (en) * 1980-02-13 1982-05-11 Campbell John W Prosthetic foot
US4413360A (en) * 1981-10-27 1983-11-08 Lamb Steve R Adjustable prosthetic ankle assembly
US4499613A (en) * 1983-03-01 1985-02-19 Yarrow Harry A Ankle joint and coupling for artificial limbs
US4547913A (en) * 1983-07-11 1985-10-22 Flex Foot, Inc. Composite prosthetic foot and leg
EP0234886A1 (en) * 1986-02-28 1987-09-02 J.E. HANGER &amp; COMPANY LIMITED Artificial foot
WO1988000815A1 (en) * 1986-07-28 1988-02-11 The Ohio Willow Wood Company, Inc. Prosthetic foot
EP0334989A2 (en) * 1988-03-29 1989-10-04 IPOS GMBH &amp; CO. KG. Artificial foot for a leg prosthesis

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE77583C (en) *
DE295807C (en) *
DE372426C (en) * 1921-10-08 1923-03-27 Anton Leisten Artificial foot
DE874643C (en) * 1948-03-27 1953-04-27 Leopold Franz Skokan foot prosthesis
US2617115A (en) * 1949-07-25 1952-11-11 Emmett C Ellery Ankle joint for artificial legs
DE844041C (en) * 1950-09-15 1952-07-17 Otto Jacobi Orthopedic shoe insert for the front and metatarsals amputees
GB738845A (en) * 1953-01-23 1955-10-19 Blatchford & Sons Ltd Artificial limb
US4328594A (en) * 1980-02-13 1982-05-11 Campbell John W Prosthetic foot
US4413360A (en) * 1981-10-27 1983-11-08 Lamb Steve R Adjustable prosthetic ankle assembly
US4499613A (en) * 1983-03-01 1985-02-19 Yarrow Harry A Ankle joint and coupling for artificial limbs
US4547913A (en) * 1983-07-11 1985-10-22 Flex Foot, Inc. Composite prosthetic foot and leg
EP0234886A1 (en) * 1986-02-28 1987-09-02 J.E. HANGER &amp; COMPANY LIMITED Artificial foot
WO1988000815A1 (en) * 1986-07-28 1988-02-11 The Ohio Willow Wood Company, Inc. Prosthetic foot
EP0334989A2 (en) * 1988-03-29 1989-10-04 IPOS GMBH &amp; CO. KG. Artificial foot for a leg prosthesis

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996029032A1 (en) * 1995-03-17 1996-09-26 O'byrne, Michael Prosthetic unit
US7846213B2 (en) 2004-05-28 2010-12-07 össur hf. Foot prosthesis with resilient multi-axial ankle
US9668887B2 (en) 2004-05-28 2017-06-06 össur hf Foot prosthesis with resilient multi-axial ankle

Also Published As

Publication number Publication date
FR2658717B1 (en) 1994-04-29

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