US2475372A - Artificial foot(two-link) - Google Patents

Artificial foot(two-link) Download PDF

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US2475372A
US2475372A US791127A US79112747A US2475372A US 2475372 A US2475372 A US 2475372A US 791127 A US791127 A US 791127A US 79112747 A US79112747 A US 79112747A US 2475372 A US2475372 A US 2475372A
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section
tarsus
metatarsal
phalanges
hinged
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US791127A
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John G Catranis
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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
    • 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

Definitions

  • This invention relates to artiiicial leg and foot structures, and has for its object a sectional foot structure, the sections of which are pivotally connected or articulated together, and have movement during the walking cycle against spring resistance, all so as to effect laterial flexion and progressive dorsiflexion.
  • a foot structure consisting of :an ⁇ upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivotal or hinged joint, a metatarsal section consisting f right and left divisions hinged to the front end of the lower tarsus section, phalangesA sections consisting of right and left divisions hinged on a transverse axis to the front end of the metatarsal divisions, the upper tarsus having a rigid forward extension overhanging the metatarsal section, and spring means interposed between the metatarsal and phalanges sections and the rigid overhanging portion of the upper tarsus section to resist pivotal movements of the vrnetatarsal and the phalanges sections and divisions.
  • Figure 1 is a side elevation of an articial foot structure and the contiguous portion of the leg structure embodying this invention.
  • Figure 2 is a plan view of parts seen in Figure l, part of the upper tarsus section being removed.
  • Figure 3 is a longitudinal sectional view of the foot structure and the contiguous portion of the leg structure.
  • FIGS 4, 5, 6 and I are sectional views taken respectively on line 4-4, 5 5, 6--3 and 1-I, Figure 3.
  • the reference numeral I designates the upper tarsus section, 2 the lower tarsus section, 3 the metatarsal section, and 4 the phalanges section. 5 designates the contiguous portion of the leg structure.
  • the upper tarsus section I is formed with a recess 6 in its upper side, or is in the general form of a box, and is provided with depending spaced lugs 'I on its lower side which extend into a recess 8 in the lower tarsus section 2. It is pivoted or hinged to the lower tarsus section as by a forward and rearward extending pivot or spindle 9 extending through the lugs 1 into bearings Il), II, in the adjacent walls of the lower tarsus.
  • upper tarsus section is also formed with a forward extending rigid portion I3 constituting the instep part of the foot structure, this overhanging the metatarsal section 3.
  • the metatarsal section 3 is hinged or pivoted at its rear end at I4 to forwardly extending bearing lugs I5 at the front end of the lower tarsus section 2, this pivot extending transversely on a substantially horizontal axis.
  • the metatarsal section 3 is here shown as formed with a bearing hub I5 extending transversely thereof and mounted on the pivot I4, there being a bushing I1 between the hub and the pivot I4.
  • the metatarsal section consists of right and left divisions or links, each pivoted at its rear end at I4 to the front end of the lower tarsus section, and at I8 to one of the divisions of the phalanges section.
  • the phalanges section 4 is hinged at its rear end on a transverse axis at I8 to the front ends of the right and left divisions of the metatarsal section 3.
  • the phalanges section 4 is composed of right and left divisions, or halves.
  • each division of the phalanges section is formed with a pair of upward extending bearing lugs I9 between which stop arms 2
  • the spring means for resisting the pivotal movement of the metatarsal and phalanges sections 3, 4, is here illustrated as a laminated leaf spring 2
  • the phalanges section is composed of right and left divisions, see Figure 6, the front end of the spring 23 presses on a iiexible fibrous bridge 25 connecting the sections, as shown in Figure '7.
  • the stop arms 20 are located to limit the flexing action of the phalanges divisions relative to the metatarsal section 3.
  • Rubber bumpers 26 are interposed between the forward extension I3 of the upper tarsus section and the divisions of the phalanges section, these being located above the joints I8. Also rubber bumpers 21 are interposed between the -upper and lower tarsus sections I, 2, in the recess in the latter, on opposite sides of the spindle or hinge 9. Also a rubber bumper 23 is located between the leg structure and the upper tarsus section I in the rear of the ankle joint.
  • the leg structure r includes a tibia member which includes upper and lower sections and 3
  • extends into the upper tarsus section, or the recess 6 thereof, and is pivoted to the upper tarsus section by a transversely extending ankle joint or hinge 38, this extending crosswise .and infront of the axis of the swivel joint between the sections 30 and 3
  • the swivel joint as here shown, includes a pin 39 extending axially of the sections 30 and 3
  • the leg structure also includes a frame or tibia member 5
  • the resilient means are spring ar-ms or pron-gs 43 anchored at their lower ends in the lower section 3
  • the swivelvpin 39 has heads 41 and 48 at its opposite ends for holding it from displacement.
  • the spring prongs 43 will have space to ilex slightly withinlimits d-ue to the arcuate slots 44, and resist the swiveling movement.
  • the swiveling movement takes place Vwhen the weight of the amputee is on the artificial leg and foot, and also the pivotal movement of ⁇ the upper tarsus about ⁇ the axis 9 takes place while the weight ofthe amputee is on the -articial leg and foot, and the amputee shifts his body laterally in one direction or the other 4while the artificial foot is planted on the ground.
  • the swiveling action permits the leg to change its radial'angle relat'vely inward or outward to the foot during certain movements in walking and other shifts'of the leg, these different relative radial angles being illustrated by the positions designated A,'B and C, in Figure 2.
  • the metatarsal and phalanges sections 3 and 4 shift about their hinged axes while'the amputee is applying his Weight to the artificial foot and lifting the heel off the walking surface while the toeis on the walking surface, the spring 2
  • the leg structure in addition to the tibia includes a fibula link 50 which performs its function analogous to that of the bula of a natural leg.
  • the section 3U of the leg structure has a bearing 30
  • This foot structure is particularly advantageous inv that it simulates quite closely the movements of a natural foot during the walking cycle and conditions encountered in normal walking, and permits progressive dorsiexion during walkmg.
  • An artificial foot structure includingan upper tarsus'section'and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section hinged on a transverse axis to the front end of the lower tarsus section, a phalanges section hinged on a transverse axis to the front end of the metatarsal section, the upper tarsus section having a forward extending rigid portion over the metatarsal section, and spring means between the lower tarsus section, the phalangessection and the overhanging-'portion pf the upper tarsus section to oppose flexing of the metatarsal and phalanges sections about their hinged axes.
  • An artificial foot structure including an upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section hinged ⁇ on va transverse axis to the front end of the lower tarsus section, a phalanges section hinged on a transverse axis to the front end of the metatarsal sectionpthe upper tarsus section having -a forward-extending-'rigid portion over-the metatarsal section, and a 4leaf-spring pressing Vat its opposite endsonthe lowerftarsus'section-and the phalanges ⁇ section and fulcrumed'between lits ends onthe under iside of th-e rigid ex-tension'of the upper tarsussection. ⁇
  • the phalanges section an-d the overhanginglportion'ofthe-'upper tarsussection to oppose flexing-of the'phalang-es section'about its hingedl axis, the'leg struct-ure'including upper-and'lower-sections*swiveled together on Ian upright axisvadjacent-*the upper side of the upper tarsus section, the lower section of the leg structure being connect-ed' to-'the upper tarsus section by a transverse Iank-le 'join-t extending crosswise of the axis ofthe' swve-ledjoin't.
  • An artificial leganti foot-structure including-jan npper-tarsussection Vand a lower tarsussectionihinged-"together'by afforward and rearward extending pivot, a metatarsal section hinged on"ai'fransverse ⁇ axis-to the frontend 'of the lowertarsus'section',v aphalanges section hngedon a' transverse -axlsito the *front end of the metatalsalisecti'on,itheupper tarsus section having 'a forward vextending rigid portion over the metatarsal section-anda lleaf spring pressing at its opposite endsonthe lower tarsus section and the phalanges section and ful'crumed between its endsonftheunder side oftheirigid extension of the'upper'tarsussectiony the-leg structure including upper and lower sections'swiv-l eled together'on ⁇ an upright a'xi's'a-djacentthe upper
  • An artificial foot structure including an upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section hinged on a transverse axis to the front end of the lower tarsus section, a phalanges section hinged on a transverse axis to the front end of the rnetatarsal section, the upper tarsus section having a forward extending rigid portion over the metatarsal section, and a leaf spring pressing at its opposite ends on the lower tarsus section and the phalanges section and fulcrurned between its ends on the under side of the rigid extension of the upper tarsus section, the leaf spring pressing at its rear end on the hinge between the lower tarsus and the metatarsal sections in the Vertical plane of the axis of the hinge joint between the lower tarsus and metatarsal sections, the spring pressing at its front end on the front end portion of the phalanges section and fulc
  • An artificial foot structure including an upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section hinged on a transverse axis to the front end of the lower tarsus section, a phalanges seotion hinged on a transverse axis to the front end of the metatarsal section, the upper tarsus section having a forward extending rigid portion over the metatarsal section, and a leaf spring pressing at its opposite ends on the lower tarsus section and the phalanges section and fulcrumed between its ends on the under side of the rigid extension of the upper tarsus section, the leaf spring pressing at its rear end on the hinge between the lower tarsus and the metatarsal sections in the vertical plane of the axis of the hinge joint between the lower tarsus and metatarsal sections, the spring pressing at its front end on the front end portion of the phalanges section and fulcrurned between its
  • An articial leg and foot structure including an upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section hinged on a transverse axis to the front end of the lower tarsus section, a phalanges section hinged on a transverse axis to the front end of the inetatarsal section, the upper tarsus section having a forward extending rigid portion over the metatarsal section, and a leaf spring pressing at its opposite ends on the lower tarsus section and the phalanges section and fulcruined between its ends on the under side of the rigid extension o the upper tarsus section, the leaf spring pressing at its rear end on the hinge between the lower tarsus and the metatarsal sections in the vertical plane of the axis of the hinge joint between the lower tarsus and metatarsai sections, the spring pressing at its front end on the front end portion of the phalanges section and fulcru
  • An articial foot structure including an upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section hinged on a transverse axis to the front end of the lower tarsus section, a phalanges section hinged on a transverse axis to the iront end oi the metatarsal section, the upper tarsus section having a forward extending rigid portion over the metatarsal section, the phalanges section consisting of right and left divisions pivoted independently of each other at the front end of the rnetatarsal section, and spring means between the lower tarsus section, the divisions of the phalanges section and the overhanging portion of the upper tarsus section to oppose flexing of the metatarsal and the phalanges sections about their hinged axes.
  • An artiiicial foot structure including an upper tarsus and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section including right and left divisions hinged to the front end of the lower tarsus section, a phalanges section including right and left divisions hinged on a transverse axis to the front ends of the divisions of the metatarsal section respectively, and yielding means between the lower tarsus section and the phalanges divisions to oppose the iiexing of said divisions about their hinged axes.
  • An artificial foot structure including an upper tarsus and a lower tarsus section hinged together by a forward and rearward extending lpivot, a metatarsal section including right and left divisions hinged to the front end of the lower tarsus section, a phalanges section including right and left divisions hinged on a transverse laxis to the front ends of the d'visions of the metatarsal section respectively, yielding means between the lower tarsus section and the phalanges divisions to oppose the exing of said divisions about their hinged axes, said yielding means being common to the divisions of the nietatarsal and phalanges sections.
  • An artiiicial foot structure including an upper tarsus and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section including right and left divisions hinged to the front end of the lower tarsus section, a phalanges section including right and left divisions hinged on a transverse axis to the front ends of the divisions of the metatarsal section respectively, yielding means between the lower tarsus section and the phalanges divisions to oppose the flexing of said divisions about their hinged axes, said yielding means being common to the divisions of the phalanges section and including a leaf spring extending lengthwise of the metatarsal and phalanges sections and pressing at its ends on the lower tarsus sections at the joint between the lower tarsus section and the rear 7 ends oi" the divisionsy of the ⁇ metatarsal section, at its front end on the divisions-of the .phalanges section, and between its ends on the front
  • An artificial' foot structure including an upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal ⁇ section hinged on a transverse axis to the front end of the lower tarsu-s section, a phalangesk section hinged on a transverse axis to the ⁇ front end of the metatarsal section, they upper tarsus section having a.
  • An artificial foot structure including an upper tarsus and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsai section including right and lefty divisions hinged to the front end of the lower tarsus section, a phalanges section including right and left divisions,v hinged on a transverse axis to the front ends of the divisions.
  • yielding means between the lower tarsus section and the phalanges divisions to oppose the flexingv of said divisions abouttheir hinged axes said yielding means being common to the divisions of t i e metatarsal and phalanges sections and including a leaf spring extending lengthwise or the metatarsal and phalanges sections and pressing at its ends on the lower tarsus sections at the joint between the lower tarsus section and the rear ends of the divisions of the metatarsal section, at its front ⁇ end on the divisions of the phalanges section, and between its ends on the front end of the Lipper tarsus section, and compressible bumpers between the upper and lower tarsus sections, on opposite sides of the forward and rearward extending axis of the hinged joint connecting them, and compressible bumpers between the joint between the divisions of the inetatarsal and phalanges sections, and the front end of the upper tarsus section.

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  • Health & Medical Sciences (AREA)
  • Transplantation (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
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Description

J. G. CATRANIS ARTIFICIAL FOOT (Two LINK) 2 Sheets-Sheet l July 5, 1949.
Filed Dec. 11, 1947 `f /NVENTOR- .my 194, J. G. cATRANls 2,475,372
ARTIFICIAL FOOT (TWO LINK) Filed Dec. 1l, 1947 2 Sheets-Sheet 2 VIII/l L IN VEN TOR.'
Patented July 5, 1949 UNITED STATES PATENT OFFICE 2,475,372 ARTIFICIAL FOUT (TWO-LINK) John G. Catranis, Syracuse, N. Y. Application December 11, 1947, Serial No. 791,127
14 Claims.
This invention relates to artiiicial leg and foot structures, and has for its object a sectional foot structure, the sections of which are pivotally connected or articulated together, and have movement during the walking cycle against spring resistance, all so as to effect laterial flexion and progressive dorsiflexion.
More specifically, it has for its object a foot structure consisting of :an` upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivotal or hinged joint, a metatarsal section consisting f right and left divisions hinged to the front end of the lower tarsus section, phalangesA sections consisting of right and left divisions hinged on a transverse axis to the front end of the metatarsal divisions, the upper tarsus having a rigid forward extension overhanging the metatarsal section, and spring means interposed between the metatarsal and phalanges sections and the rigid overhanging portion of the upper tarsus section to resist pivotal movements of the vrnetatarsal and the phalanges sections and divisions.
The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.
In describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views. .A
Figure 1 is a side elevation of an articial foot structure and the contiguous portion of the leg structure embodying this invention.
Figure 2 is a plan view of parts seen in Figure l, part of the upper tarsus section being removed.
Figure 3 is a longitudinal sectional view of the foot structure and the contiguous portion of the leg structure.
Figures 4, 5, 6 and I are sectional views taken respectively on line 4-4, 5 5, 6--3 and 1-I, Figure 3.
The reference numeral I designates the upper tarsus section, 2 the lower tarsus section, 3 the metatarsal section, and 4 the phalanges section. 5 designates the contiguous portion of the leg structure.
The upper tarsus section I is formed with a recess 6 in its upper side, or is in the general form of a box, and is provided with depending spaced lugs 'I on its lower side which extend into a recess 8 in the lower tarsus section 2. It is pivoted or hinged to the lower tarsus section as by a forward and rearward extending pivot or spindle 9 extending through the lugs 1 into bearings Il), II, in the adjacent walls of the lower tarsus. The
upper tarsus section is also formed with a forward extending rigid portion I3 constituting the instep part of the foot structure, this overhanging the metatarsal section 3. The metatarsal section 3 is hinged or pivoted at its rear end at I4 to forwardly extending bearing lugs I5 at the front end of the lower tarsus section 2, this pivot extending transversely on a substantially horizontal axis. The metatarsal section 3 is here shown as formed with a bearing hub I5 extending transversely thereof and mounted on the pivot I4, there being a bushing I1 between the hub and the pivot I4. As seen in Figures 2 and 5, the metatarsal section consists of right and left divisions or links, each pivoted at its rear end at I4 to the front end of the lower tarsus section, and at I8 to one of the divisions of the phalanges section.
The phalanges section 4 is hinged at its rear end on a transverse axis at I8 to the front ends of the right and left divisions of the metatarsal section 3. As seen in Figures 1 and 6, the phalanges section 4 is composed of right and left divisions, or halves. There is a transverse pivot I8 for each division. As here shown, each division of the phalanges section is formed with a pair of upward extending bearing lugs I9 between which stop arms 2|) on the metatarsal section extend, the stop arms having bearings for the hinge pins IB which also extend through the bearing lugs I9.
The spring means for resisting the pivotal movement of the metatarsal and phalanges sections 3, 4, is here illustrated as a laminated leaf spring 2| having a saddle 22 at its rear end seated on the hub I6, the front end of the spring pressing on the phalanges section at 23, and the intermediate part of the spring being ulcrumed at 24 on the under side of the front end of the rigid extension I3 of the upper tarsus. As the phalanges section is composed of right and left divisions, see Figure 6, the front end of the spring 23 presses on a iiexible fibrous bridge 25 connecting the sections, as shown in Figure '7. The stop arms 20 are located to limit the flexing action of the phalanges divisions relative to the metatarsal section 3. Rubber bumpers 26 are interposed between the forward extension I3 of the upper tarsus section and the divisions of the phalanges section, these being located above the joints I8. Also rubber bumpers 21 are interposed between the -upper and lower tarsus sections I, 2, in the recess in the latter, on opposite sides of the spindle or hinge 9. Also a rubber bumper 23 is located between the leg structure and the upper tarsus section I in the rear of the ankle joint.
The leg structure r includes a tibia member which includes upper and lower sections and 3| connected together `by a swivel joint located just above the upper face of the upper tarsus section. The lower lsection 3| extends into the upper tarsus section, or the recess 6 thereof, and is pivoted to the upper tarsus section by a transversely extending ankle joint or hinge 38, this extending crosswise .and infront of the axis of the swivel joint between the sections 30 and 3|. The swivel joint, as here shown, includes a pin 39 extending axially of the sections 30 and 3|, a bushing 40 in the lower section 3| into which the pin extends, the bushing having an annular flange 4| overlying the upper `side of the section 3|, and resilient spring means for applying resistance to the' turning movement of the section 30 relative to the section 3|. The leg structure also includes a frame or tibia member 5| extending on opposite sides of the swivel joint, and a transverse member 42 extending between the sections -30-and 3| Iand lthrusting-against the flan-ge 4| As here shown, the resilient means are spring ar-ms or pron-gs 43 anchored at their lower ends in the lower section 3| on .opposite sides of the pin '3-9 and extendingthrough the ange 4|, into and through alined arcuate slots 44 in the member 42 and the upper section 30, and into holes in a washer 45 anchored tothe section 30, as by a dowel pin 46. The swivelvpin 39 has heads 41 and 48 at its opposite ends for holding it from displacement. During the -swiveling movemen-t of the section 30 relative to the section 3|, obviously the spring prongs 43 will have space to ilex slightly withinlimits d-ue to the arcuate slots 44, and resist the swiveling movement. The swiveling movement takes place Vwhen the weight of the amputee is on the artificial leg and foot, and also the pivotal movement of `the upper tarsus about `the axis 9 takes place while the weight ofthe amputee is on the -articial leg and foot, and the amputee shifts his body laterally in one direction or the other 4while the artificial foot is planted on the ground. The swiveling action permits the leg to change its radial'angle relat'vely inward or outward to the foot during certain movements in walking and other shifts'of the leg, these different relative radial angles being illustrated by the positions designated A,'B and C, in Figure 2.
During the walking cycle, the metatarsal and phalanges sections 3 and 4 shift about their hinged axes while'the amputee is applying his Weight to the artificial foot and lifting the heel off the walking surface while the toeis on the walking surface, the spring 2| applying enough resistance'to make the pivotal movement analasous to that of a natural foot, and also to return the sections to normal position when the amputee lifts the artificial foot from the walking surface. The leg structure in addition to the tibia includes a fibula link 50 which performs its function analogous to that of the bula of a natural leg. The section 3U of the leg structure has a bearing 30| for connection to a knee -brake or lock forming no part of this invention.
This foot structure is particularly advantageous inv that it simulates quite closely the movements of a natural foot during the walking cycle and conditions encountered in normal walking, and permits progressive dorsiexion during walkmg.
What I claim is.'
1. An artificial foot structure, the foot structure includingan upper tarsus'section'and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section hinged on a transverse axis to the front end of the lower tarsus section, a phalanges section hinged on a transverse axis to the front end of the metatarsal section, the upper tarsus section having a forward extending rigid portion over the metatarsal section, and spring means between the lower tarsus section, the phalangessection and the overhanging-'portion pf the upper tarsus section to oppose flexing of the metatarsal and phalanges sections about their hinged axes.
2. An artificial foot structure, the foot structure including an upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section hinged `on va transverse axis to the front end of the lower tarsus section, a phalanges section hinged on a transverse axis to the front end of the metatarsal sectionpthe upper tarsus section having -a forward-extending-'rigid portion over-the metatarsal section, anda 4leaf-spring pressing Vat its opposite endsonthe lowerftarsus'section-and the phalanges `section and fulcrumed'between lits ends onthe under iside of th-e rigid ex-tension'of the upper tarsussection.`
3. An artificial leg andffootstructure, the foot structure includ-ing'an upper ltarsussection and a lower `tarsus se'ctionfhingedltogether .by afor- Award yand rearward exten'dng'rpivot, a'metaitazrsai section hinged on vva transverse axis 'to *the front end of the lower tarsus section, a phalanges'section hin-ged on atransverseaxistotheffront end of the metatarsal'sectiomthe uppertarsus section having a forward ex'temii-r-igl ngi-d Vport-ion over the metatarsai section, and 'spring means between the lower 'tarsus `section. the phalanges section an-d the overhanginglportion'ofthe-'upper tarsussection to oppose flexing-of the'phalang-es section'about its hingedl axis, the'leg struct-ure'including upper-and'lower-sections*swiveled together on Ian upright axisvadjacent-*the upper side of the upper tarsus section, the lower section of the leg structure being connect-ed' to-'the upper tarsus section by a transverse Iank-le 'join-t extending crosswise of the axis ofthe' swve-ledjoin't.
4. An artificial leganti foot-structure; the foot structure including-jan npper-tarsussection Vand a lower tarsussectionihinged-"together'by afforward and rearward extending pivot, a metatarsal section hinged on"ai'fransverse` axis-to the frontend 'of the lowertarsus'section',v aphalanges section hngedon a' transverse -axlsito the *front end of the metatalsalisecti'on,itheupper tarsus section having 'a forward vextending rigid portion over the metatarsal section-anda lleaf spring pressing at its opposite endsonthe lower tarsus section and the phalanges section and ful'crumed between its endsonftheunder side oftheirigid extension of the'upper'tarsussectiony the-leg structure including upper and lower sections'swiv-l eled together'on `an upright a'xi's'a-djacentthe upper side offtheupper tarsus section, thelower section of i the leg structure being "connected "to the upper tarsus Vsection-'bya transverse ankle joint extending crosswise of the axis of theswiveled joint.
5. An artificial foot structuretm-footistructure inc-ludingan upper tarsus vsection and a lower tarsus sectionhinged-togetherby a fortion having a forward extending rigid portion over the metatarsal section, and a leaf spring pressing at its opposite ends on the lower tarsus section and the phalanges section and fulcruined between its ends on the under side of the rigid extension of the upper tarsus section, the leaf spring extending in a general direction in alinernent with the axis of the hinged joint between the upper and lower tarsus sections.
6. An artificial foot structure, the foot structture including an upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section hinged on a transverse axis to the front end of the lower tarsus section, a phalanges section hinged on a transverse axis to the front end of the rnetatarsal section, the upper tarsus section having a forward extending rigid portion over the metatarsal section, and a leaf spring pressing at its opposite ends on the lower tarsus section and the phalanges section and fulcrurned between its ends on the under side of the rigid extension of the upper tarsus section, the leaf spring pressing at its rear end on the hinge between the lower tarsus and the metatarsal sections in the Vertical plane of the axis of the hinge joint between the lower tarsus and metatarsal sections, the spring pressing at its front end on the front end portion of the phalanges section and fulcruined between its ends on the under side of the front end of the rigid extension of the upper tarsus section.
7. An artificial foot structure, the foot structure including an upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section hinged on a transverse axis to the front end of the lower tarsus section, a phalanges seotion hinged on a transverse axis to the front end of the metatarsal section, the upper tarsus section having a forward extending rigid portion over the metatarsal section, and a leaf spring pressing at its opposite ends on the lower tarsus section and the phalanges section and fulcrumed between its ends on the under side of the rigid extension of the upper tarsus section, the leaf spring pressing at its rear end on the hinge between the lower tarsus and the metatarsal sections in the vertical plane of the axis of the hinge joint between the lower tarsus and metatarsal sections, the spring pressing at its front end on the front end portion of the phalanges section and fulcrurned between its ends on the under side of the front end of the rigid extension of the upper tarsus section, and the spring extending in a general direction in alinement with the hinge joint between the upper and lower tarsus sections.
8. An articial leg and foot structure, the foot structure including an upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section hinged on a transverse axis to the front end of the lower tarsus section, a phalanges section hinged on a transverse axis to the front end of the inetatarsal section, the upper tarsus section having a forward extending rigid portion over the metatarsal section, and a leaf spring pressing at its opposite ends on the lower tarsus section and the phalanges section and fulcruined between its ends on the under side of the rigid extension o the upper tarsus section, the leaf spring pressing at its rear end on the hinge between the lower tarsus and the metatarsal sections in the vertical plane of the axis of the hinge joint between the lower tarsus and metatarsai sections, the spring pressing at its front end on the front end portion of the phalanges section and fulcrumed between its ends on the under side of the front end of the rigid extension of ne upper tarsus section, and the spring extending in a general direction in alinement with the hinge joint between the upper and lower tarsus sections, the leg structure including upper and lower sections connected together by a swivel joint adjacent the upper tarsus section, the lower section of the leg structure being pivoted to the upper tarsus by an ankle joint extending transversely of the axis of the swivel joint.
9. An articial foot structure, the foot Structure including an upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section hinged on a transverse axis to the front end of the lower tarsus section, a phalanges section hinged on a transverse axis to the iront end oi the metatarsal section, the upper tarsus section having a forward extending rigid portion over the metatarsal section, the phalanges section consisting of right and left divisions pivoted independently of each other at the front end of the rnetatarsal section, and spring means between the lower tarsus section, the divisions of the phalanges section and the overhanging portion of the upper tarsus section to oppose flexing of the metatarsal and the phalanges sections about their hinged axes.
10. An artiiicial foot structure including an upper tarsus and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section including right and left divisions hinged to the front end of the lower tarsus section, a phalanges section including right and left divisions hinged on a transverse axis to the front ends of the divisions of the metatarsal section respectively, and yielding means between the lower tarsus section and the phalanges divisions to oppose the iiexing of said divisions about their hinged axes.
11. An artificial foot structure including an upper tarsus and a lower tarsus section hinged together by a forward and rearward extending lpivot, a metatarsal section including right and left divisions hinged to the front end of the lower tarsus section, a phalanges section including right and left divisions hinged on a transverse laxis to the front ends of the d'visions of the metatarsal section respectively, yielding means between the lower tarsus section and the phalanges divisions to oppose the exing of said divisions about their hinged axes, said yielding means being common to the divisions of the nietatarsal and phalanges sections.
12. An artiiicial foot structure including an upper tarsus and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal section including right and left divisions hinged to the front end of the lower tarsus section, a phalanges section including right and left divisions hinged on a transverse axis to the front ends of the divisions of the metatarsal section respectively, yielding means between the lower tarsus section and the phalanges divisions to oppose the flexing of said divisions about their hinged axes, said yielding means being common to the divisions of the phalanges section and including a leaf spring extending lengthwise of the metatarsal and phalanges sections and pressing at its ends on the lower tarsus sections at the joint between the lower tarsus section and the rear 7 ends oi" the divisionsy of the` metatarsal section, at its front end on the divisions-of the .phalanges section, and between its ends on the front end of the upper tarsus section;
13'. An artificial' foot structure, the foot structure including an upper tarsus section and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsal` section hinged on a transverse axis to the front end of the lower tarsu-s section, a phalangesk section hinged on a transverse axis to the` front end of the metatarsal section, they upper tarsus section having a. forward extending rigid portion over the metatarsal section, spring means between the lower tarsus section, the phalanges section and the overhanging portion of the upper tarsus section toI oppose exing ofthe phalanges sections about their hinged axes, and compressible bumpers between the upper and lower tarsus sections on opposite sides of the forward and rearward extending axis of the hinged joint connecting them.
14. An artificial foot structure including an upper tarsus and a lower tarsus section hinged together by a forward and rearward extending pivot, a metatarsai section including right and lefty divisions hinged to the front end of the lower tarsus section, a phalanges section including right and left divisions,v hinged on a transverse axis to the front ends of the divisions. of the metatarsal section respectively, yielding means between the lower tarsus section and the phalanges divisions to oppose the flexingv of said divisions abouttheir hinged axes, said yielding means being common to the divisions of t i e metatarsal and phalanges sections and including a leaf spring extending lengthwise or the metatarsal and phalanges sections and pressing at its ends on the lower tarsus sections at the joint between the lower tarsus section and the rear ends of the divisions of the metatarsal section, at its front` end on the divisions of the phalanges section, and between its ends on the front end of the Lipper tarsus section, and compressible bumpers between the upper and lower tarsus sections, on opposite sides of the forward and rearward extending axis of the hinged joint connecting them, and compressible bumpers between the joint between the divisions of the inetatarsal and phalanges sections, and the front end of the upper tarsus section.
JOHN G. CATRANIS.
No references cited.
US791127A 1947-12-11 1947-12-11 Artificial foot(two-link) Expired - Lifetime US2475372A (en)

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Cited By (45)

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US2640200A (en) * 1950-07-28 1953-06-02 Wisbrun Walter Prosthesis construction
US3842443A (en) * 1972-08-30 1974-10-22 Watkins L Resilient pivot joint for an artificial leg
US3906552A (en) * 1972-08-30 1975-09-23 Watkins Lloyd J Pivot joint adapter
US3956775A (en) * 1975-02-18 1976-05-18 Moore Robert R Rotator for prosthetic ankle joint
US4364128A (en) * 1981-08-31 1982-12-21 Jobst Institute, Inc. Artificial foot
WO1989005617A1 (en) * 1987-12-21 1989-06-29 College Park Prosthetics Inc. Prosthetic foot
US4865612A (en) * 1986-07-28 1989-09-12 The Ohio Willow Wood Company, Inc. Prosthetic foot
US5007938A (en) * 1989-07-08 1991-04-16 Ipos Gmbh & Co. Kg Artificial foot for a leg prosthesis
US5139525A (en) * 1989-07-31 1992-08-18 Kristinsson Oessur Prosthetic foot
US5158570A (en) * 1991-05-10 1992-10-27 College Park Industries, Inc. Prosthetic foot with improved ankle and elastomeric heel pad
WO1992020305A2 (en) * 1991-05-10 1992-11-26 College Park Industries, Inc. Prosthetic foot with heel adjustement mechanism
US5181933A (en) * 1991-02-28 1993-01-26 Phillips L Van Split foot prosthesis
US5258038A (en) * 1991-05-10 1993-11-02 College Park Industries, Inc. Prosthetic foot with ankle joint and toe member
US5314499A (en) * 1991-04-04 1994-05-24 Collier Jr Milo S Artificial limb including a shin, ankle and foot
US5387246A (en) * 1989-04-13 1995-02-07 Phillips; Van L. Prosthetic ski leg
US5443528A (en) * 1992-11-17 1995-08-22 Allen; Scott Coil spring prosthetic foot
US5486209A (en) * 1989-04-13 1996-01-23 Phillips; Van L. Foot prosthesis having auxiliary ankle construction
US5509938A (en) * 1991-02-28 1996-04-23 Phillips; Van L. Prosthetic foot incorporating adjustable bladder
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US5545234A (en) * 1991-04-04 1996-08-13 Collier, Jr.; Milo S. Lower extremity prosthetic device
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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
US5728175A (en) * 1995-10-03 1998-03-17 Rincoe; Richard G. Artificial ankle joint with cushion structures and prosthetic devices formed therewith
US5800570A (en) * 1996-03-14 1998-09-01 Collier; Milo S. Lower extremity prosthetic device
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US20050216097A1 (en) * 2004-03-16 2005-09-29 Jerome Rifkin Tensegrity joints for prosthetic, orthotic, and robotic devices
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US20090287314A1 (en) * 2008-05-13 2009-11-19 Rifkin Jerome R Joints for prosthetic, orthotic and/or robotic devices
US20100116018A1 (en) * 2008-05-13 2010-05-13 Felix Koller Method for checking a knocking device
US20110015762A1 (en) * 2009-07-14 2011-01-20 Tensegrity Prosthetics Inc. Joints for prosthetic, orthotic and/or robotic devices
WO2011066354A2 (en) 2009-11-25 2011-06-03 Otto Bock Healthcare Gmbh Prosthetic foot
US20110208322A1 (en) * 2009-07-14 2011-08-25 Tensegrity Prosthetics Inc. Joints for Prosthetic, Orthotic and/or Robotic Devices
US8876913B2 (en) 2012-10-12 2014-11-04 Tai Lore Made, LLC Prosthetic foot with modular construction
US9351853B2 (en) 2008-08-18 2016-05-31 The Ohio Willow Wood Company Prosthetic foot
IT201600112979A1 (en) * 2016-11-09 2018-05-09 Suisse Creative Eng Sa ANTHROPOMORPHIC END
US9968466B2 (en) 2012-10-12 2018-05-15 Tai Lore Made, LLC Prosthetic foot with programmable movement
US10292840B2 (en) * 2017-06-07 2019-05-21 University Of South Florida Biomimetic prosthetic device

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Cited By (74)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640200A (en) * 1950-07-28 1953-06-02 Wisbrun Walter Prosthesis construction
US3842443A (en) * 1972-08-30 1974-10-22 Watkins L Resilient pivot joint for an artificial leg
US3906552A (en) * 1972-08-30 1975-09-23 Watkins Lloyd J Pivot joint adapter
US3956775A (en) * 1975-02-18 1976-05-18 Moore Robert R Rotator for prosthetic ankle joint
US4364128A (en) * 1981-08-31 1982-12-21 Jobst Institute, Inc. Artificial foot
US4865612A (en) * 1986-07-28 1989-09-12 The Ohio Willow Wood Company, Inc. Prosthetic foot
DE3891184B4 (en) * 1987-12-21 2007-04-12 College Park Prosthetics Inc., Fraser Foot prosthesis
US4892554A (en) * 1987-12-21 1990-01-09 Robinson David L Prosthetic foot
WO1989005617A1 (en) * 1987-12-21 1989-06-29 College Park Prosthetics Inc. Prosthetic foot
DE3891184T1 (en) * 1987-12-21 1997-07-31 College Park Prosthetics Inc Prosthetic foot
US5387246A (en) * 1989-04-13 1995-02-07 Phillips; Van L. Prosthetic ski leg
US6527811B1 (en) 1989-04-13 2003-03-04 Van L. Phillips Foot prosthesis with modular foot plate
US6406500B1 (en) 1989-04-13 2002-06-18 Van L. Phillips Foot prosthesis having curved forefoot
US6165227A (en) * 1989-04-13 2000-12-26 Phillips; Van L. Attachment construction for prosthesis
US5976191A (en) * 1989-04-13 1999-11-02 Phillips; Van L. Foot prosthesis having curved forefoot
US5728176A (en) * 1989-04-13 1998-03-17 Flex-Foot, Inc. Attachment construction for prosthesis
US5486209A (en) * 1989-04-13 1996-01-23 Phillips; Van L. Foot prosthesis having auxiliary ankle construction
US5593457A (en) * 1989-04-13 1997-01-14 Phillips; Van L. Foot prosthesis having auxiliary ankle construction
US5514186A (en) * 1989-04-13 1996-05-07 Phillips; Van L. Attachment construction for prosthesis
US5007938A (en) * 1989-07-08 1991-04-16 Ipos Gmbh & Co. Kg Artificial foot for a leg prosthesis
US5139525A (en) * 1989-07-31 1992-08-18 Kristinsson Oessur Prosthetic foot
US5549714A (en) * 1990-09-21 1996-08-27 Phillips; Van L. Symes foot prosthesis
US5509938A (en) * 1991-02-28 1996-04-23 Phillips; Van L. Prosthetic foot incorporating adjustable bladder
US5181933A (en) * 1991-02-28 1993-01-26 Phillips L Van Split foot prosthesis
US5514185A (en) * 1991-02-28 1996-05-07 Phillips; Van L. Split foot prosthesis
US6071313A (en) * 1991-02-28 2000-06-06 Phillips; Van L. Split foot prosthesis
US5776205A (en) * 1991-02-28 1998-07-07 Phillips; Van L. Split foot prosthesis
US5545234A (en) * 1991-04-04 1996-08-13 Collier, Jr.; Milo S. Lower extremity prosthetic device
US5314499A (en) * 1991-04-04 1994-05-24 Collier Jr Milo S Artificial limb including a shin, ankle and foot
US5158570A (en) * 1991-05-10 1992-10-27 College Park Industries, Inc. Prosthetic foot with improved ankle and elastomeric heel pad
WO1992020305A2 (en) * 1991-05-10 1992-11-26 College Park Industries, Inc. Prosthetic foot with heel adjustement mechanism
US5258038A (en) * 1991-05-10 1993-11-02 College Park Industries, Inc. Prosthetic foot with ankle joint and toe member
WO1992020305A3 (en) * 1991-05-10 1993-01-07 College Park Ind Inc Prosthetic foot with heel adjustement mechanism
US5695527A (en) * 1992-11-17 1997-12-09 Medonics L.L.C. Coil prosthetic foot
US5653767A (en) * 1992-11-17 1997-08-05 Medonics, Llc Prosthetic foot
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
US5728175A (en) * 1995-10-03 1998-03-17 Rincoe; Richard G. Artificial ankle joint with cushion structures and prosthetic devices formed therewith
US20020087216A1 (en) * 1996-02-16 2002-07-04 Atkinson Stewart L. Prosthetic walking system
US5800570A (en) * 1996-03-14 1998-09-01 Collier; Milo S. Lower extremity prosthetic device
US6811571B1 (en) 2000-05-02 2004-11-02 Van L. Phillips Universal prosthesis with cushioned ankle
US20050071018A1 (en) * 2000-05-02 2005-03-31 Phillips Van L. Universal prosthesis with cushioned ankle
US6443995B1 (en) 2000-12-22 2002-09-03 Barry W. Townsend Prosthetic foot
US6743260B2 (en) 2000-12-22 2004-06-01 Barry W. Townsend Prosthetic foot
US20040199265A1 (en) * 2000-12-22 2004-10-07 Townsend Barry W. Prosthetic foot
US20040225376A1 (en) * 2000-12-22 2004-11-11 Townsend Barry W. Prosthetic foot
US6936074B2 (en) 2000-12-22 2005-08-30 Barry W. Townsend Prosthetic foot
US7108723B2 (en) 2000-12-22 2006-09-19 Townsend Barry W 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
US20110093091A1 (en) * 2004-03-16 2011-04-21 Tensegrity Prosthetics, Inc. Tensegrity Joints for Prosthetic, Orthotic, and Robotic Devices
WO2005089683A3 (en) * 2004-03-16 2005-11-17 Tensegrity Prosthetics Inc Tensegrity joints for prosthetic, orthotic, and robotic devices
US20050216097A1 (en) * 2004-03-16 2005-09-29 Jerome Rifkin Tensegrity joints for prosthetic, orthotic, and robotic devices
WO2005089683A2 (en) * 2004-03-16 2005-09-29 Tensegrity Prosthetics, Inc. Tensegrity joints for prosthetic, orthotic, and robotic devices
US20080004718A1 (en) * 2004-06-29 2008-01-03 Lueder Mosler Artificial Foot
US8246695B2 (en) * 2004-06-29 2012-08-21 Otto Bock Healthcare Gmbh Artificial foot
US20100116018A1 (en) * 2008-05-13 2010-05-13 Felix Koller Method for checking a knocking device
US8821589B2 (en) 2008-05-13 2014-09-02 Jerome R. Rifkin Joints for prosthetic, orthotic and/or robotic devices
US20090287314A1 (en) * 2008-05-13 2009-11-19 Rifkin Jerome R Joints for prosthetic, orthotic and/or robotic devices
US9351853B2 (en) 2008-08-18 2016-05-31 The Ohio Willow Wood Company Prosthetic foot
US20110015762A1 (en) * 2009-07-14 2011-01-20 Tensegrity Prosthetics Inc. Joints for prosthetic, orthotic and/or robotic devices
US20110208322A1 (en) * 2009-07-14 2011-08-25 Tensegrity Prosthetics Inc. Joints for Prosthetic, Orthotic and/or Robotic Devices
EP2522311A2 (en) 2009-11-25 2012-11-14 Otto Bock HealthCare GmbH Prosthetic foot
WO2011066354A2 (en) 2009-11-25 2011-06-03 Otto Bock Healthcare Gmbh Prosthetic foot
US8876913B2 (en) 2012-10-12 2014-11-04 Tai Lore Made, LLC Prosthetic foot with modular construction
US9186264B2 (en) 2012-10-12 2015-11-17 Tai Lore Made, LLC Prosthetic foot with modular construction
US9265627B2 (en) 2012-10-12 2016-02-23 Tai Lore Made, LLC Prosthetic foot with modular construction
US9844449B2 (en) 2012-10-12 2017-12-19 Tai Lore Made, L.L.C. Prosthetic foot with modular construction
US9968466B2 (en) 2012-10-12 2018-05-15 Tai Lore Made, LLC Prosthetic foot with programmable movement
US10433986B2 (en) 2012-10-12 2019-10-08 Tai Lore Made, LLC Prosthetic foot with modular construction
IT201600112979A1 (en) * 2016-11-09 2018-05-09 Suisse Creative Eng Sa ANTHROPOMORPHIC END
WO2018087691A3 (en) * 2016-11-09 2018-06-28 Suisse Creative Engineering Sa Artificial limb
US10292840B2 (en) * 2017-06-07 2019-05-21 University Of South Florida Biomimetic prosthetic device
US10500070B1 (en) 2017-06-07 2019-12-10 University Of South Florida Biomimetic prosthetic device

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