US20020077706A1 - Energy storing foot prosthesis with improved plantar flexion - Google Patents

Energy storing foot prosthesis with improved plantar flexion Download PDF

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US20020077706A1
US20020077706A1 US09945092 US94509201A US2002077706A1 US 20020077706 A1 US20020077706 A1 US 20020077706A1 US 09945092 US09945092 US 09945092 US 94509201 A US94509201 A US 94509201A US 2002077706 A1 US2002077706 A1 US 2002077706A1
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member
section
support member
prosthetic foot
compressible
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US09945092
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Van Phillips
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Phillips Van L.
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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
    • 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
    • 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
    • A61F2002/5081Additional features
    • A61F2002/5083Additional features modular
    • 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
    • A61F2002/665Soles
    • 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
    • A61F2002/6678L-shaped

Abstract

A prosthetic foot characterized by an easily exchangeable auxiliary ankle member demountably attached to forefoot and sole portions, which are in turn demountably and interchangeably connected. The forefoot, heel and auxiliary ankle portions are fabricated from polymer impregnated and encapsulated laminates, including such laminates as carbon fibers and/or fiberglass or synthetic fibers such as Kevlar. The easily demountable connection of the auxiliary ankle permits interchangeability thereof to match the activity schedule of the wearer utilizing the prosthetic foot without the necessity of frequent visits to the prosthetist. A compressible member between the forefoot member and the sole member, and function blocks located between the various members provide additional adjustability. The orientation of the auxiliary ankle member and compressible member also allows for increased plantar flexion.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This application claims the benefit of U.S. Provisional Application No. 60/229,113, filed Aug. 30, 2000, the entirety of which is hereby incorporated by reference.[0001]
  • BACKGROUND OF THE INVENTION
  • 1. Field of the Invention [0002]
  • This invention relates to foot prostheses in general, and specifically to a prosthetic foot characterized by a unitary foot and heel construction, and an auxiliary ankle construction which permits the flexibility of the prosthesis to be selectively determined and easily changed. [0003]
  • 2. Background of the Invention [0004]
  • Although many prosthetic devices have attempted to simulate the ambulation of a normal foot, very few of them are readily adjustable in terms of their performance characteristics. Adjustability is especially desirable among amputees who frequently participate in a variety of physical activities requiring varying levels of energy-storing and -releasing attributes. [0005]
  • Certainly, some prior art devices more nearly achieve the desired ease of adjustability than do others. For example, see my U.S. Pat. No. 4,547,913 for my invention relating to a “Composite Prosthetic Foot and Leg,” U.S. Pat. No. 4,822,363 for my invention relating to a “Modular Composite Prosthetic Foot and Leg,” my U.S. Pat. No. 5,181,932 for my invention relating to a “Foot Prosthesis Having Auxiliary Ankle Construction” and U.S. Pat. No. 5,290,319 for my invention relating to a “Prosthetic Foot Incorporating Adjustable Bladders” Also my U.S. Pat. Nos. 5,037,444 and 6,071,313 discloses a prosthetic foot device with similar preferred materials and methods of manufacture, and with corresponding benefits therefrom. Each of these patents is incorporated by reference herein. [0006]
  • Notwithstanding the valuable contribution and characteristics of my aforementioned patented foot prostheses and specifically the modularity thereof, the adjustment of those prostheses is relatively involved. Any adjustment of the performance characteristics of those prostheses basically requires the disassembly of a covering shroud (if present) and of structural members from each other and specifically from the pylon tube (through bolt, nut, and washer combinations, for example). After a new combination of structural members has been selected, it typically must similarly be reassembled. Disassembly of the prosthetic foot from the pylon requires a significant amount of time, effort, and money as it must be done by a prosthetist. [0007]
  • Other prosthetic foot devices are even less readily adjusted, and include U.S. Pat. No. 3,335,428 to Gajdos, which attempts to duplicate the skeletal and skin structure of a natural human foot, U.S. Pat. No. 2,075,583 to Lange, which incorporates a rubber form mounted in operative relationship with a rigid metallic core, and U.S. Pat. No. 4,645,509 to Poggi, which teaches a prosthetic foot incorporating a monolithic keel or beam of relatively massive proportions intended to react to the load of an amputee's body during walking, running, jumping, and the like and to release the resultant stored energy to create foot lift and thrust complementing the amputee's natural stride. [0008]
  • Moreover, the dynamic performance of many of these other prior art devices is relatively stiff and immediate, and generally cannot produce adequate plantar flexion during heel strike, while retaining sufficient stiffness for toe-off. [0009]
  • SUMMARY OF THE INVENTION
  • It is, therefore, one object of my invention to provide a foot prosthesis which can be easily adjusted without the necessity of removing the foot from the vertical pylon of an amputee's prosthetic leg. This will allow an active amputee to participate in a wide variety of activities without the necessity of frequent visits to the prosthetist. [0010]
  • In one embodiment, the present invention provides a foot prosthesis characterized by an easily removable auxiliary support member, herein also termed an auxiliary ankle, in conjunction with a primary support member, herein termed the forefoot member, and a lower support member, herein termed the sole member. The primary and lower support members are of such character as to be easily adaptable to provide size adjustment or accommodation of different spring rates to suit the size of foot, or of the stride and weight of the amputee. The auxiliary support member provides further adjustment to accommodate varying activity levels of a given amputee. The ease of removal of the auxiliary support member provides a degree of quick and easy adjustment previously unobtainable with prior prosthetics. [0011]
  • These members are preferably fabricated, for example, from polymer impregnated and encapsulated laminates, including such laminates as carbon fibers and/or fiberglass or synthetic fibers such as Kevlar. Such members provide desirable energy-storing and -releasing characteristics. [0012]
  • Another object of the invention is the incorporation in a prosthetic foot of the aforementioned character of compressible members in order to achieve a gradual dynamic transition, which can further improve the degree of adjustability of the prosthesis. [0013]
  • The particular location of attachment of the auxiliary support member allows for increased performance. Plantar flexion can be increased by not limiting the flexibility of the forefoot portion during heel strike, yet the ankle portion is still stiffened by the auxiliary support member during toe off. The inclusion of compressible members disposed between the auxiliary support member, and the forefoot member allows for further adjustability of performance characteristics. [0014]
  • Other objects and advantages of the invention will be apparent from the following specification and the accompanying drawings, which are for the purpose of illustration only. [0015]
  • For purposes of summarizing the invention and the advantages achieved over the prior art, certain objects and advantages of the invention have been described herein above. Of course, it is to be understood that not necessarily all such objects or advantages may be achieved in accordance with any particular embodiment of the invention. Thus, for example, those skilled in the art will recognize that the invention may be embodied or carried out in a manner that achieves or optimizes one advantage or group of advantages as taught herein without necessarily achieving other objects or advantages as may be taught or suggested herein. [0016]
  • All of these embodiments are intended to be within the scope of the invention herein disclosed. These and other embodiments of the present invention will become readily apparent to those skilled in the art from the following detailed description of the preferred embodiments having reference to the attached figures, the invention not being limited to any particular preferred embodiment(s) disclosed.[0017]
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • Having thus summarized the general nature of the invention and its essential features and advantages, certain preferred embodiments and modifications thereof will become apparent to those skilled in the art from the detailed description herein having reference to the figures that follow, of which: [0018]
  • FIG. 1 is a side elevation view of one preferred embodiment of a prosthetic foot; [0019]
  • FIG. 2 is a side elevation view of an alternative embodiment of a prosthetic foot; [0020]
  • FIG. 3 is a top view of the foot of FIG. 1; [0021]
  • FIG. 4 is a front elevation view of the foot of FIG. 1; [0022]
  • FIG. 5 is a top view of an alternative embodiment of a prosthetic foot; [0023]
  • FIG. 6 is a front elevation view of the foot of FIG. 5.[0024]
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Referring to the drawings, and particularly to FIG. 1, I show one preferred embodiment of a foot prosthesis [0025] 10 constructed in accordance with the teachings of the invention. The foot 10 generally includes a forefoot member 80, a sole member 50, and an auxiliary support member 86 operatively and demountably attached to each other at the arch section 44. Attachment is preferably accomplished using suitable nut and bolt combinations 104 associated with a load-transmitting metallic plate 106. The auxiliary member is preferably attached to the forefoot member such that the auxiliary member may add to the stiffness of the ankle portion of the forefoot member. If desired, a retaining band 70 may be provided at the ankle section 80. A compressible member 116 may be provided between the auxiliary member, and the forefoot member. Function blocks 118, 120, 121, and 119, FIG. 2 may also be provided in order to vary the length of the effective lever arms of the various members. If indicated, the forefoot and sole portions can be permanently secured to each other, as by epoxy adhesive, a polyurethane resilient layer, or the like.
  • The forefoot member [0026] 80 preferably includes a substantially rigid upper attachment section 40, a forward and downward curving ankle section 42, an arch section, 44, and a distal toe section 46. The sections 40, 42, 44, and 46 are preferably formed integrally with one another and simultaneously by the incorporation of a plurality of laminae embedded in a hardened, flexible polymer.
  • In the particular embodiment shown, the sole member [0027] 50 includes an attachment section 58 and a heel section 54 extending substantially rearward from said attachment section 58. The sections 58 and 54 are preferably formed integrally with one another and simultaneously by the incorporation of a plurality of laminae embedded in a hardened, flexible polymer as described herein.
  • The auxiliary support member [0028] 86 includes a lower section 94 and an upper section 88. Said lower section 94 of the auxiliary support member 86 is rigidly attached to said forefoot member 80 and said sole member 50 with nut and bolt combinations 104, and extends substantially rearward and upward, its uppermost edge 88 preferably terminating below said attachment section 40 of said forefoot member 80.
  • In an alternative embodiment, shown in FIG. 2, the sole member [0029] 50 extends substantially forward from said attachment section to the forwardmost tip 48 of the foot 10, and the forefoot member 80 preferably extends slightly forward from the forwardmost tip 84 of the auxiliary support member 86, curving slightly upwards to a distal tip 45. In this alternative embodiment, a block 119 can be interposed between the tip 45 of the forefoot portion 80, and the toe section 52 of the sole member 50.
  • Resilient blocks of wedge-shaped configuration and of various size may be included, for example in the positions indicated in the drawings as [0030] 118, 120, 121, and 119, FIG. 2, such that they allow for the variability of the lever arms of the structural members 80, 86, and 50. For example FIG. 1 shows a block 118 interposed between the under surface of the forward portion 84 of the auxiliary ankle 86 and the upper surface of the arch section 44 of the forefoot member 80, which has the effect of decreasing the lever arm of the toe portion 46 of the forefoot member 80.
  • Referring to FIGS. 3 and 4, the attachment section [0031] 40 of the forefoot member 80 preferably incorporates two centrally-located openings 90. The attachment section 40 is substantially rigid and capable of sustaining torsional, impact and other loads impressed thereupon by the toe portion 46 and heel portion 54 of the prosthesis. In addition, the inherent rigidity of the attachment section 40 causes the effective transmission of the aforesaid loads imposed thereupon to a suitable ancillary prosthetic pylon 30, by bolt and nut combinations 98 assembled through openings 90 to a pylon coupling 33. A screw 92 or other suitable attachment means secures the ancillary pylon 30 in the coupling 33. Those skilled in the art will recognize that a variety of other attachment means may be utilized, such as glue, rivets, tape, etc.
  • In an alternative embodiment shown in FIGS. [0032] 5-8, the sole member 50 and part of the forefoot portion 80 are bifurcated into multiple side-by-side foot portions such that they are capable of movement independent from one another. Preferably, the foot is bifurcated by the provision of a slot in said forefoot and sole portions. A strap 74 or similar expedient may be provided to limit the movement of the side-by-side foot portions relative to each other, if desired. The auxiliary ankle member described herein would also be preferably included in this embodiment. The concept of the split foot is described in detail in my U.S. Pat. No. 6,071,313 which is incorporated herein by reference.
  • A compressible member [0033] 116 may be disposed between said forefoot member 80 and said auxiliary support member 86. The compressible member 116 is preferably fabricated such that it provides additional adjustment of the performance characteristics of the prosthesis 10 through the variation of its degree of compressibility. For example, an inflatable bladder filled with air, CO2 or other gas could be used. In a particularly preferred embodiment of the present invention the compressible member 116 may comprise a compressible foam member. A foam member provides a low-cost compressible member for energy storage and release, and avoids the inherent potential difficulties of air bladders such as leakage and risk of puncture. The foam member also provides a slight dampening of the prosthetic foot which improves the overall response characteristics and provides a more natural feeling foot.
  • The compressible member [0034] 116 may be molded or fabricated from a wide variety of resilient materials, as desired, such as natural or synthetic rubber, plastics, polyurethane, honeycomb structures or any one of a variety of other materials well known to those skilled in the art for storing and releasing energy. Cellular foam is preferred to provide a desirable spring characteristic and a more natural stride. For example, expanded polyurethane such as cellular Vulkolka PUR-CELL No. 15-50 with a density of approximately 500 kilograms per cubic meter, available from Pleiger Plastics Company of Washington, Pa., may be used to form the compressible member 116. Foam densities of between about 150 and 1500 kg/m3 may also be used to obtain the benefits of the invention taught herein.
  • The rear surface of the auxiliary ankle member [0035] 86 is preferably allowed to slip relative to the compressible member 116 in order to allow for increased plantar flexion. The compressible member 116 may be held in place by glue, velcro, snaps, or a variety of other methods as recognized by one skilled in the art such that the preferred slipping between the auxiliary ankle member 86 and the compressible member 116 is allowed.
  • Alternatively, the compressible member [0036] 116 may be replaced by a substantially non-compressible friction-reducing element, or eliminated altogether. The absence of the compressible member 116 would cause the wearer to experience more resistance to motion during toe-off, while its presence allows for slower, more gradual resistance during toe-off. Either or both of these cases may be desirable depending on the activity for which the foot is needed.
  • Toe pads [0037] 130 and/or a heel pad 126 may be disposed under the toe section 46 of the forefoot member 80 and the heel section 54 of the sole member 50 respectively, so as to provide minor shock absorption to the prosthetic 10.
  • In the preferred embodiment, bolt and nut combinations [0038] 104, in conjunction with the load-distributing metallic plates 106, serve to secure the sole member 50 in operative relationship with the forefoot member 80 of the prosthesis. This mode of affixation facilitates the assembly or dismounting of selected sole members 50 in operative relationship with selected forefoot members 80, thus permitting a wide range of different sizes and stress load response characteristics to be related to each other to accomplish the optimum functional correspondence between the primary and sole portions 80 and 50.
  • The auxiliary ankle member [0039] 86 provides further adjustability of the performance characteristics of the prosthetic 10 by adding to the stiffness of the forefoot member 80. The auxiliary ankle 86 is formed from fibrous laminates of the same character as the various portions of the prosthesis 10. In a preferred embodiment of the present invention, the auxiliary ankle 86 incorporates an attachment section 94 which is operatively associated with the ankle section 42 of the forefoot member 80 and the attachment section 58 of the sole member 50.
  • The auxiliary ankle [0040] 86 is preferably secured in operative relationship with the curvilinear ankle section 42 of the forefoot member 80 through the aforementioned assembly of the bolt and nut combinations 104. On its end opposite from the attachment section 94, ankle member 86 has an upper section 92 which is preferably fixed in operative relationship with a compressible member 116 and the curvilinear ankle section 42 of the forefoot member 80 by the use of a flexible, yet substantially non-stretching strap 70. Said compressible member 116 providing a gradual dynamic transition throughout toe-off.
  • The strap [0041] 70 may be fabricated from a suitably tough, flexible material such as impregnated canvas or the like, and is configured and assembled with the ankle section 42 of the forefoot member 80, the auxiliary support member 86, and/or the compressible member 116 to achieve desired stress-storage and -release performance in the prosthesis. For example, the strap 70 may be releasably attached around the auxiliary support member 86 through the provision of Velcro-type fasteners or similar expedient.
  • A restraining element such as the strap [0042] 70 may be incorporated at various locations on the prosthesis 10 to restrict the distance that associated structural members 86, 80, and 50 may move from one another in order to control the performance characteristics of said foot. For example, one skilled in the art will recognize that increased distance of motion between the auxiliary support member 86 and forefoot member 80 during heel strike will allow for increased plantar flexion. The retaining element may be utilized to prevent undesirable excessive loading and stressing of a particular member 86, 80, or 50, and/or to combine the spring-stress response characteristics of the associated structural members 12 under certain loading conditions. For example, the strap 70 as assembled in FIG. 1 permits the auxiliary member 86 to assist in raising the toe 46 of the prosthesis 10 and to store and release spring energy when the heel portion 54 is struck on the ground in front of the wearer. The retaining element may be either substantially elastic, or substantially static depending on the degree of relative motion desired.
  • In the preferred embodiment, the auxiliary ankle member [0043] 86 is secured against the relatively concave surface of the curvilinear ankle section 42, so that the anticipated upward deflection of a toe section 46 of the forefoot member 80, as more thoroughly described below, will eventually cause deformation of the auxiliary ankle 86 as well as deformation of the ankle section 42, effectively combining the deformation resistance and energy storage characteristics of the auxiliary ankle member 86 with those of the forefoot member 80. Alternative embodiments would include securing the auxiliary ankle 86 to the underside of the arch section 44 and continuing to use the strap 70 to maintain the functional relationship between the auxiliary ankle 86 and the forefoot member 80 in order to achieve the aforedescribed desired combination of the deformation resistance and energy storage characteristics of the auxiliary ankle member 86 with those of the ankle section 42.
  • The auxiliary ankle member [0044] 86 can be provided with different numbers of laminates to make it more or less compliant to loads transmitted through the forefoot member 80. Consequently, when confronted with various anomalies in an amputee, such as overweight or excess activity levels, the basic structure of the forefoot member 80, and more particularly the ankle section 42, can be materially modified to provide ankle portion action which is precisely adjusted to the needs of the amputee. Moreover, a variety of auxiliary ankle members 86 can be made available to an active amputee, allowing the flexibility of the prosthesis to be adjusted on the basis of the particular activity which the amputee is undertaking. Furthermore, the location of the point of attachment at the arch section 44 allows exchange of auxiliary ankle sections 86 to be made without necessarily removing the prosthesis 10 from the pylon 30.
  • A cosmetic cover (not shown) can be provided to shroud the prosthesis [0045] 10 after the optimum assemblage of the primary and sole members 80 and 50 and an auxiliary ankle member 86 has been accomplished. The cosmetic cover, which may be formed of low-density formed polymer, is not required to serve any ancillary shock-absorbing or other stress-isolating function since all of the loads imposed upon the prosthesis can be absorbed, transmitted and reasserted in a manner to be described in greater detail below.
  • The materials from which the forefoot member [0046] 80, sole member 50, and the auxiliary ankle 86 are formed preferably possess the ability to provide an energy-storing, resilient, spring-like effect. This is preferred because each engagement of the prosthesis 10 with an adjacent surface impresses compression, torsional and other loads upon the prosthesis 10 which are stored within the prosthesis and then, dependent upon the stride of the wearer, re-impressed upon said surface to achieve a natural stride conforming, ideally, in all respects to the stride of the unimpaired limb of the wearer of the prosthesis 10.
  • These members are preferably fabricated, for example, from polymer impregnated and encapsulated laminates. To achieve the relatively thin construction of the forefoot and sole members [0047] 80 and 50 and the auxiliary support member 86 of the prosthesis 10, the aforesaid polymers are utilized in conjunction with various laminating materials. Various types of fibrous laminae can be utilized to achieve the continuum required by the design of the forefoot and sole members 80 and 50 and the auxiliary support member 86 to complement the stress-absorbing and storing characteristics of the polymers in which said fibrous laminae are embedded.
  • Of course, there is a wide variety of fibrous reinforcements in the form of laminae available at the present time, including such inorganic fibers as glass or carbon fibers. These inorganic fibers are customarily provided in tape or sheet form and can be readily superimposed in the mold to permit them to be encapsulated in the selected polymer. [0048]
  • Obviously, the number of superimposed laminae and the lengths thereof, together with the thickness of the encapsulating polymer, determine the stress characteristics of the resultant forefoot and sole members [0049] 80 and 50 and the auxiliary support member 86 and, correspondingly, determine the total weight of the prosthesis 10. As will be apparent from the discussion herein, the forefoot and sole members 80 and 50 and the auxiliary support member 86 are designed to specifically accommodate individuals having different foot sizes, different weights and different strides and the individual design of the forefoot and sole members 80 and 50 and the auxiliary support member 86 provides for matching, to an extent previously unknown in the art, the natural characteristics of the wearer's uninjured limb.
  • Furthermore, the function blocks [0050] 118, 120, 121 and 119, FIG. 2 can be provided in different sizes and in materials having different compression characteristics so that the respective lever arms and the corresponding deflections of the heel section 54 and the toe section 46 or 52 may be increased or decreased.
  • It will be understood by those of skill in the art that the terms such as ankle, heel portion, arch and forefoot portion are used herein as convenient references to describe the general function and/or location of the various portions of the prosthesis and are not intended to indicate that the prosthesis has a structural configuration replicating these anatomical structures of the human foot. [0051]
  • Although this invention has been disclosed in the context of certain preferred embodiments and examples, it will be understood by those skilled in the art that the present invention extends beyond the specifically disclosed embodiments to other alternative embodiments and/or uses of the invention and obvious modifications and equivalents thereof. Thus, it is intended that the scope of the present invention herein disclosed should not be limited by the particular disclosed embodiments described above, but should be determined only by a fair reading of the claims that follow. [0052]

Claims (21)

    What is claimed is:
  1. 1. A prosthetic foot comprising:
    a primary support member capable of supporting the amputee, and of providing energy storage and release, said primary support member having a substantially vertical attachment section, an intermediate curvilinear ankle section curving downward and forward from said upper section, an arch section extending forward and downward from said ankle section, and a toe section extending substantially forward from said arch section, said toe section providing a lever arm for said foot, said upper section being non-rotatably securable to a pylon member, socket or other prosthetic leg member intermediate said foot and the stump of an amputee;
    an auxiliary support member having an upper section and a lower section, said auxiliary support member being secured at said lower section thereof to said arch section of said primary support member, said auxiliary support member extending substantially rearward and upward generally along said primary support member, said upper section terminating substantially near said attachment section of said primary support member;
    whereby said auxiliary support member can be removed and exchanged without removing said foot prosthesis from said prosthetic leg member.
  2. 2. The prosthetic foot of claim 1 additionally comprising a lower support member having an attachment section and a heel section, said attachment section of said lower support member being secured with one or both of said auxiliary support member or said primary support member at a point along said arch section of said primary support member, said lower support member extending substantially rearward such that bending stress is distributed substantially evenly throughout said lower support member during heel strike, said heel section providing a lever arm for said foot.
  3. 3. The prosthetic foot of claim 1 wherein a restraining element is used to limit the movement of one member of said prosthesis relative to another member.
  4. 4. The prosthetic foot of claim 3 wherein said restraining element is a strap of substantially flexible and non-stretchable material.
  5. 5. The prosthetic foot of claim 3 wherein said restraining element is a strap of substantially flexible and stretchable material.
  6. 6. The prosthetic foot of claim 1 additionally comprising a substantially non-compressible element of friction-reducing material disposed between said lower section of said auxiliary support member, and said toe section of said primary support member.
  7. 7. The prosthetic foot of claim 1 additionally comprising a resilient compressible member disposed between said upper section of said auxiliary ankle member and said ankle section of said primary support member, said compressible member being fabricated from a compressible foam.
  8. 8. The prosthetic foot of claim 5 wherein said compressible member comprises an inflatable bladder.
  9. 9. The prosthetic foot of claim 1 additionally comprising one or more compressible pads disposed on the lower surface of said prosthesis such that they provide cushioning to said prosthesis during use by the wearer.
  10. 10. The prosthetic foot of claim 1 additionally comprising a resilient, compressible block disposed between said lower section of said auxiliary support member, and said toe section of said primary support member such that said block will be compressed during toe-off.
  11. 11. A prosthetic foot comprising:
    a primary support member capable of supporting the amputee, and of providing energy storage and release, said primary support member having a substantially vertical attachment section, an intermediate curvilinear ankle section curving downward and forward from said attachment section, and an arch section extending forward and downward from said ankle section, said upper section being non-rotatably securable to a pylon member, socket or other prosthetic leg member intermediate said foot and the stump of an amputee;
    an auxiliary support member having an upper section and a lower section, said auxiliary support member being secured with said arch section of said primary support member at a point on the lower section of said auxiliary support member, said auxiliary support member extending rearward and upward substantially along said primary support member, said upper section terminating near said attachment section of said primary support member;
    a lower support member having a central attachment section, a heel section extending substantially rearward from said attachment section, and a toe section extending substantially forward from said attachment section, said toe and heel sections providing lever arms for said foot, said attachment section of said lower support member being secured with said auxiliary support member and said primary support member at a point along said arch section of said primary support member;
    whereby said auxiliary support member can be easily removed and exchanged without removing said foot prosthesis from said prosthetic leg member.
  12. 12. The prosthetic foot of claim 9 wherein a restraining element is used to limit the movement of one member of said prosthesis relative to another member.
  13. 13. The prosthetic foot of claim 10 wherein said restraining element is a strap of substantially flexible and non-stretchable material.
  14. 14. The prosthetic foot of claim 10 wherein said restraining element is a strap of substantially flexible and stretchable material.
  15. 15. The prosthetic foot of claim 9 additionally comprising a resilient compressible member disposed between said upper section of said auxiliary ankle member and said ankle section of said primary support member, said compressible member comprising compressible foam.
  16. 16. The prosthetic foot of claim 13 wherein said compressible member comprises an inflatable bladder.
  17. 17. The prosthetic foot of claim 9 comprising a substantially non-compressible friction-reducing element disposed between said upper section of said auxiliary ankle member and said ankle section of said primary support member.
  18. 18. The prosthetic foot of claim 9 additionally comprising one or more compressible pads disposed on the lower surface of said prosthesis, such that they provide cushioning to said prosthesis during use by the wearer.
  19. 19. The prosthetic foot of claim 9 additionally comprising a resilient, compressible block disposed between said lower section of said auxiliary support member, and said toe section of said primary support member such that said block will be compressed during toe-off.
  20. 20. The prosthetic foot of claim 9 wherein said arch portion of said forefoot member terminates in an upward-curving tip above said toe portion of said sole member, wherebetween a substantially resilient, compressible control block is disposed, and additionally comprising a substantially resilient, compressible control block disposed between said lower section of said auxiliary support member, and said primary support member such that said blocks would be compressed during toe-off.
  21. 21. A prosthetic foot, comprising:
    a resilient forefoot member for attachment to an artificial leg;
    a sole member attached to said forefoot member; and
    a stiffening member removably attached to a point substantially near the lower end of said forefoot member such that it alters the resilience of said forefoot member.
US09945092 2000-08-30 2001-08-30 Energy storing foot prosthesis with improved plantar flexion Abandoned US20020077706A1 (en)

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Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030028256A1 (en) * 2001-03-30 2003-02-06 Townsend Barry W. Prosthetic foot with tunable performance
US20040117036A1 (en) * 2001-03-30 2004-06-17 Townsend Barry W Prosthetic foot with tunable performance
US20040153168A1 (en) * 2002-11-06 2004-08-05 Childress Dudley S. Shape and roll prosthetic foot
US20040162623A1 (en) * 1998-04-10 2004-08-19 Phillips Van L. Foot prosthesis having cushioned ankle
US20040186590A1 (en) * 2001-03-30 2004-09-23 Townsend Barry W. Prosthetic foot with tunable performance
US20040186592A1 (en) * 2001-03-30 2004-09-23 Townsend Barry W. Prosthetic foot with tunable performance
US20050049721A1 (en) * 2003-08-29 2005-03-03 Sulprizio Michael Scott Wideband CDMA mobile device initial frequency offset acquisition
US20050177250A1 (en) * 2001-03-30 2005-08-11 Townsend Barry W. Prosthetic foot with tunable performance
US20050216098A1 (en) * 2000-06-30 2005-09-29 Roland J. Christensen Variable resistance cell
US20060069450A1 (en) * 2004-09-18 2006-03-30 Otto Bock Healthcare Lp Lower leg prosthesis with improved roll over
US20060178754A1 (en) * 2001-03-30 2006-08-10 Townsend Barry W Prosthetic foot with tunable performance and improved vertical load/shock absorption
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
US20070213840A1 (en) * 2003-09-30 2007-09-13 Townsend Barry W Prosthetic Foot with Tunable Performance
US20070213841A1 (en) * 2001-03-30 2007-09-13 Townsend Barry W Prosthetic foot with tunable performance
US20070219643A1 (en) * 2004-04-01 2007-09-20 Townsend Barry W Prosthetic Foot With Tunable Performance
US20080004719A1 (en) * 2006-07-03 2008-01-03 Sigurdur Asgeirsson Prosthetic foot
US7374578B2 (en) 2001-03-30 2008-05-20 Bioquest Prosthetics, Llc Prosthetic foot with tunable performance
WO2008070177A1 (en) * 2006-12-06 2008-06-12 Freedom Innovations, Inc. 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
US7794506B2 (en) 2007-09-18 2010-09-14 Freedom Innovations, Llc Multi-axial prosthetic ankle
US20110071650A1 (en) * 2003-09-30 2011-03-24 Townsend Barry W Resilient prosthetic and orthotic components which incorporate a plurality of sagittally oriented struts
US8034121B2 (en) 2008-04-18 2011-10-11 Freedom Innovations, Llc Prosthetic foot with two leaf-springs joined at heel and toe
US8236062B2 (en) 2001-03-30 2012-08-07 Bioquest Prosthetics Llc Prosthetic foot with tunable performance
WO2013082182A1 (en) * 2011-12-01 2013-06-06 Ossur Hf Prosthetic foot with dual foot blades and vertically offset toe
CN103189020A (en) * 2010-10-25 2013-07-03 奥托·博克保健有限公司 Prosthetic foot
US8500825B2 (en) 2010-06-29 2013-08-06 Freedom Innovations, Llc Prosthetic foot with floating forefoot keel
US20160081821A1 (en) * 2014-09-19 2016-03-24 Ossur Hf Variable stiffness prosthetic foot
USD795433S1 (en) 2015-06-30 2017-08-22 Össur Iceland Ehf Prosthetic foot cover
USD797292S1 (en) 2014-06-30 2017-09-12 össur hf Prosthetic foot plate

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9011554B2 (en) * 2008-07-25 2015-04-21 Fillauer Composites Llc High-performance multi-component prosthetic foot
US8317877B2 (en) 2008-08-18 2012-11-27 The Ohio Willow Wood Company Prosthetic foot
US20100206348A1 (en) * 2009-02-13 2010-08-19 Demetrios Markou Crutch
US8413313B2 (en) * 2009-11-06 2013-04-09 David Delon Williams Divided-end artificial limb
CN102885663B (en) * 2012-10-24 2014-11-05 北京工道风行智能技术有限公司 Dynamic below-knee prosthesis with continuous flexible toe joint
KR101681298B1 (en) * 2015-04-27 2016-12-05 한국생산기술연구원 Artificial foot and manufacturing method thereof

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2075583A (en) 1935-08-31 1937-03-30 Lange Gottlieb Foot for artificial limbs
US2470480A (en) 1946-04-23 1949-05-17 Stanley R Fogg Artificial foot
US2453969A (en) 1947-04-03 1948-11-16 Edwin C Carter Artificial limb
US2640200A (en) 1950-07-28 1953-06-02 Wisbrun Walter Prosthesis construction
US3335428A (en) 1964-11-02 1967-08-15 Goodrich Co B F Resilient prosthetic foot made from elastic polymers of different hardness
US3551914A (en) 1968-05-09 1971-01-05 Carl Woodall Natural action toe lift artificial foot
GB1432481A (en) 1973-05-31 1976-04-14 Hanger & Co Ltd J E Symes ankle joint
US4547913A (en) 1983-07-11 1985-10-22 Flex Foot, Inc. Composite prosthetic foot and leg
US4645509A (en) 1984-06-11 1987-02-24 Model & Instrument Development Corporation Prosthetic foot having a cantilever spring keel
US4822363A (en) 1985-08-01 1989-04-18 Phillips L Van Modular composite prosthetic foot and leg
GB8605026D0 (en) 1986-02-28 1986-04-09 Hanger & Co Ltd J E Artificial foot
US5112356A (en) 1988-03-04 1992-05-12 Chas A. Blatchford & Sons Limited Lower limb prosthesis with means for restricting dorsi-flexion
US5037444A (en) 1989-01-05 1991-08-06 Phillips L Van Prosthetic foot
US5387246A (en) * 1989-04-13 1995-02-07 Phillips; Van L. Prosthetic ski leg
US5181932A (en) 1989-04-13 1993-01-26 Phillips L Van Foot prosthesis having auxiliary ankle construction
US5019109A (en) 1990-03-09 1991-05-28 Voisin Jerome P Multi-axial rotation system for artificial ankle
US5116384A (en) 1990-08-31 1992-05-26 Syncor, Ltd. Prosthetic foot
US5290319A (en) 1991-02-28 1994-03-01 Phillips L Van Prosthetic foot incorporating adjustable bladders
US6071313A (en) 1991-02-28 2000-06-06 Phillips; Van L. Split foot prosthesis
US5181933A (en) 1991-02-28 1993-01-26 Phillips L Van Split foot prosthesis
US5899944A (en) 1991-02-28 1999-05-04 Phillips; Van L. Prosthetic foot incorporating compressible members
US5653767A (en) 1992-11-17 1997-08-05 Medonics, Llc Prosthetic foot
US5549711A (en) 1993-09-30 1996-08-27 M+Ind (Model + Instrument Development) Prosthetic foot and keel therefor having progressive stiffening under increasing load
GB9401585D0 (en) 1994-01-27 1994-03-23 Sen Jung Chen Artificial foot
US6241776B1 (en) 1997-08-04 2001-06-05 Roland Christensen Prosthetic foot with reinforcing member
US5944760A (en) * 1997-08-04 1999-08-31 Roland J. Christensen Family Limited Partnership Prosthetic foot with reinforcing member

Cited By (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050234563A1 (en) * 1994-08-15 2005-10-20 Phillips Van L Foot prosthesis having cushioned ankle
US7354456B2 (en) * 1994-08-15 2008-04-08 Phillips Van L Foot prosthesis having cushioned ankle
US7879110B2 (en) 1998-04-10 2011-02-01 Ossur Hf Foot prosthesis having cushioned ankle
US20100106260A1 (en) * 1998-04-10 2010-04-29 Phillips Van L Foot prosthesis having cushioned ankle
US20040162623A1 (en) * 1998-04-10 2004-08-19 Phillips Van L. Foot prosthesis having cushioned ankle
US20080183301A1 (en) * 2000-06-30 2008-07-31 Christensen Roland J Prosthetic foot with energy transfer
US7686848B2 (en) 2000-06-30 2010-03-30 Freedom Innovations, Llc Prosthetic foot with energy transfer
US20060241783A1 (en) * 2000-06-30 2006-10-26 Christensen Roland J Variable resistance cell
US20060229736A1 (en) * 2000-06-30 2006-10-12 Christensen Roland J Prosthetic foot with energy transfer
US20050216098A1 (en) * 2000-06-30 2005-09-29 Roland J. Christensen Variable resistance cell
US7611543B2 (en) 2001-03-30 2009-11-03 Bioquest Prosthetics, Llc Prosthetic foot with tunable performance
US20050177250A1 (en) * 2001-03-30 2005-08-11 Townsend Barry W. Prosthetic foot with tunable performance
US20060178754A1 (en) * 2001-03-30 2006-08-10 Townsend Barry W Prosthetic foot with tunable performance and improved vertical load/shock absorption
US7708784B2 (en) 2001-03-30 2010-05-04 Bioquest Prosthetics, Llc Prosthetic foot with tunable performance
US20030028256A1 (en) * 2001-03-30 2003-02-06 Townsend Barry W. Prosthetic foot with tunable performance
US7211115B2 (en) 2001-03-30 2007-05-01 Townsend Barry W Prosthetic foot with tunable performance
US7226485B2 (en) 2001-03-30 2007-06-05 Bioquest Prosthetics, Llc Prosthetic foot with tunable performance
US7429272B2 (en) 2001-03-30 2008-09-30 Bioquest Prosthetics Llc Prosthetic foot with tunable performance
US20040186592A1 (en) * 2001-03-30 2004-09-23 Townsend Barry W. Prosthetic foot with tunable performance
US7410503B2 (en) 2001-03-30 2008-08-12 Bioquest Prosthetics Llc Prosthetic foot with tunable performance
US8236062B2 (en) 2001-03-30 2012-08-07 Bioquest Prosthetics Llc Prosthetic foot with tunable performance
US20040186590A1 (en) * 2001-03-30 2004-09-23 Townsend Barry W. Prosthetic foot with tunable performance
US7364593B2 (en) 2001-03-30 2008-04-29 Bioquest Prosthetics Llc Prosthetic foot with tunable performance
US7374578B2 (en) 2001-03-30 2008-05-20 Bioquest Prosthetics, Llc Prosthetic foot with tunable performance
US7507259B2 (en) 2001-03-30 2009-03-24 Bioquest Prosthetics, Llc Prosthetic foot with tunable performance
US20040117036A1 (en) * 2001-03-30 2004-06-17 Townsend Barry W Prosthetic foot with tunable performance
US20070213841A1 (en) * 2001-03-30 2007-09-13 Townsend Barry W Prosthetic foot with tunable performance
US20080183302A1 (en) * 2001-03-30 2008-07-31 Townsend Barry W Prosthetic foot with tunable performance
US7578852B2 (en) 2001-03-30 2009-08-25 Bioquest Prosthetics, Llc Prosthetic foot with tunable performance and improved vertical load/shock absorption
US20040153168A1 (en) * 2002-11-06 2004-08-05 Childress Dudley S. Shape and roll prosthetic foot
US6942704B2 (en) 2003-08-29 2005-09-13 S & L, Inc. Prosthetic foot
US20050049721A1 (en) * 2003-08-29 2005-03-03 Sulprizio Michael Scott Wideband CDMA mobile device initial frequency offset acquisition
US8574314B2 (en) 2003-09-30 2013-11-05 Bioquest Prosthetics Llc Resilient prosthetic and orthotic components which incorporate a plurality of sagittally oriented struts
US20070213840A1 (en) * 2003-09-30 2007-09-13 Townsend Barry W Prosthetic Foot with Tunable Performance
US8808395B2 (en) 2003-09-30 2014-08-19 Bioquest Prosthetics, LLC. Resilient prosthetic and orthotic components which incorporate a plurality of sagittally oriented struts
US20110071650A1 (en) * 2003-09-30 2011-03-24 Townsend Barry W Resilient prosthetic and orthotic components which incorporate a plurality of sagittally oriented struts
US8070829B2 (en) 2003-09-30 2011-12-06 Bioquest Prosthetics Llc Prosthetic foot with tunable performance
US7955399B2 (en) 2004-04-01 2011-06-07 Bioquest Prosthetics, Llc Prosthetic foot with tunable performance
US20070219643A1 (en) * 2004-04-01 2007-09-20 Townsend Barry W Prosthetic Foot With Tunable Performance
US20060069450A1 (en) * 2004-09-18 2006-03-30 Otto Bock Healthcare Lp Lower leg prosthesis with improved roll over
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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
US7794506B2 (en) 2007-09-18 2010-09-14 Freedom Innovations, Llc Multi-axial prosthetic ankle
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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US9017421B2 (en) 2011-12-01 2015-04-28 össur hf Prosthetic foot with dual foot blades and vertically offset toe
WO2013082182A1 (en) * 2011-12-01 2013-06-06 Ossur Hf Prosthetic foot with dual foot blades and vertically offset toe
USD797292S1 (en) 2014-06-30 2017-09-12 össur hf Prosthetic foot plate
US9999524B2 (en) 2014-06-30 2018-06-19 össur hf Prosthetic feet and foot covers
US20160081821A1 (en) * 2014-09-19 2016-03-24 Ossur Hf Variable stiffness prosthetic foot
US10034782B2 (en) * 2014-09-19 2018-07-31 össur hf Variable stiffness prosthetic foot
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