US1247673A - Artificial leg. - Google Patents

Description

HLH. HANGER 5!]. E. HANGER, In.

ARTIFICIAL LEG, APucAnon mm 055.28. i916.

L2%7,673 Patented Nov. 2?, 191?.

HENRY HA3? AND JAMES HANGER, 5337)., OF 'WASHINGTGR, DISTRICT OF CGLUEIBIA, ASSIC-Z-HGRS 1'0 3'. E. HAHGE-liv, INCQRPQRATED, A CUEIEQRATION OF THE DISTRICT 01;? COLUMBIh.

m ners,

To aZZgo'kom it may concern: Be it known that we, Hnnm' Hoover: HANGER anal JAMss E; l'lANGER, J1., citizens of the 'ilnitecl Stat-es, residing at Washing- Speoifibetionof Letters IPatcnt.

ARTIFIGEEJQ LEG.

Potent-eel Nov. *2", lll it.

Application files hecemner 2S, 1916. Serial No. 2139.311.

scribed, and the lower end of the thigh scction is rounded, and is provided with a vertical central slot it in the reruthereof ex tending from its lower extremity to a point 5 ton, in the District of Columbia, have inabove the knee bolt to receive the back 69 vented certain new and useful lrnprovecheck merits in Artificial Legs, of which the fol- The knee bolt 3 is rigidly secured bythe lowing a specification. clampnut 6 on the lower leg" section to per- @ur invention relates to artificial legs, rnit the operation of the lower lee; by the l .anol pertains more pertioularly'to the knee lever arm 8 adjustably secured on the knee 65 joints thereof, and to means for operating bolt. same. Said lever arm as shown in Figs 1 anrl 2 The object of our invention is to produce of the drawings, comprises the arm portion --en improved knee joint for artificial legs 8, on the inner end of which is provided l provided with an operating lever carried the split ring 9 adapted to be clamped on m within the thigh section adapted to be och the knee bolt 3 by the set screw 10 passing justsbly secured on the knee bolt to accolmthrough the lips A on the inner end, while inoclate the comfort and preference of the the outer or free end is provided with a "wearer. Another object of our invention grooved wheel 11 over which the s'uspender 2% is to produce an operating lever on the knee 12 is looped. Saicl wheel is preferably one looltspi artificial legs having means by which rieol on a link pivoted on the outer encl the angle of the lever with relation to the of the lever arm to permit the wheel to be vertical axis of the leg may be conveniently folded back when the wearer is in sitting and. easily changed to modify the action of position. so the lower leg section by the change of lever- For the purpose of limiting; the movement es age thus pro'rlucerl; and a still further obof the lower leg section and for centrally ject thereof is to produce :3.- inore simple, positioning the operating lever 8 thereon, I cheap encl eliicient knee bolt and joint for provide the back-check 5 comprising the bar artificial legs and operating device therefor 5, which at its lower end is secured to 'the Eli than has heretofore been attained. back of the lower leg section while the oppo- To these ends, our invention includes the site end is bifurcated at 13 and terminates combination encl srrengementof component in a pair of ill-shaped yokes 14- which emparts to be hereinafter described and more brace the knee bolt 3 intermediate of enrls. psrticulerly pointed out in the claims. The lever 8 is preferably positioned he as In the accompanying drawings, in which tween the bifurcated or forked member i l to like reference characters indicate similar on the back check 5, by which it is held in parts, r a substantially medial position on the bolt.

Figure l is a vertical sectional View of the In the embodiment of our invention shown knee joint of an artificial leg provided with. in Fig. 4 of the drawings, the split ring is so our operating lever; looped. back onthe arm portion 8 anti is es 2 is a transverse sectional view of the clamped on the knee bolt by the set screw' same, 10 passing through the lips A and the Fig, 3 is s top view of our back check, lever arm 8. The ring and lever thus cle- Fig. 4 is a vertical sectional view of s scribed are held in adjusted position on the unmodified form thereof, and knee bolt by the screw B passing through Fig. 5 is a vertical sectional view taken the ring and bearing against the knee bolt. on the line 5-5 of Fig. 4. It will be understood that a suspender 15 Referring to the drawings, 1 designates of ordinary form is loopecl over the wheel the thigh section of an artificial leg, and 2 11, by which the lower leg is operated, and

indicates the lower leg section which at its it will be further appreciated that the 216- 05 uii'per encl fits over the lower end of the plstment of theangle oi the lever arm relathigh section anti is pivoteil thereto by the tive to the vertical plane of the leg may be bolt 3. Both sections are hollow at had by the screws carried thereon to accorntheir azliacent ends to accommodate the opnioclatc some to the comfort one peculiari ereting mechanism to he hereinafter (leties of the wearer. Snch ad nstments may ill) ' axis of the leg,

ha conveniently made with a screw driver through the vertical slot -l, and may be made to accelerate the movcnient of the lower leg section and extend additional tension thcreon with the suspcndcr by dcprcssing the outer end of the lever, or may be adjusted to relatively retard the l cc action and case the tension oi the suspcndcr by raising the end of the lever, all to accommodate thc prefer ence and convenience of the user.

Harv thus described our invention, what we. claim as new and desire to be sccurcd by Letters Patent, is:

1. In an artificial leg, the combination with a thigh section and a lower leg section, of a lrncc bolt connecting san'ic rigidly connected with the lower log section, a laterally extending operating arm adjustably secured on said knee bolt, means for readily altering the angle oi. said arm with. relation. to the vertical ot the leg, and a snspendcr connected with the. tree end of said arm, substantially as described.

2. In an artificial leg, the combination with a thigh section and a lower leg section, of a hnec bolt connecting same and rigidly connected with the lowcr'lcg section, a laterally extending operating arm adjustably clamped on tho kneebolt intermediate of its ends, means for readily altering the angle of said arm with relation to the vertical and a suspcnder connected with the tree and of the lever, substantially as described.

3. in an. artificial log, the combination with a thigh section and a lower lag section, of a. knee bolt pivotally connecting same rigidly attached to the lower leg section, alatcrally extending mgcrating arm adjustably secured on said knee bolt, a back-check attached. to the rear of the lower leg section at its lower end and embracing said b11188 bolt at its upper and, and. a suspendcr conncctcd with the freo end of said operating arm, substantially described.

4-. ln an artificial leg, the combination with a thigl'i section and a lower leg section, of a knee bolt pivotally connecting same rigidly atachcd to the lower log section, a

laterally extending operating arm adjust ably secured on said lrncc bolt, a back-check attached to the rear of the lower leg section at its lowcrcnd and having a forked upper end embracing said hnrc bolt and the inner end of said operating 2: iii, and a Suspender connected with the free outer end of the operating arm, substantially as described.

5. In an. artificial leg, the combination with a thigh section and a lower leg section,

of a knee bolt pivotally connecting same and '50 rigidly attached to the lower leg section, a laterally extending operating arm adjust ably secured to said knee bolt, means for readily altering the angle of said arm with relation to the vertical axis of the log, a

groox 'cd wheel connected with the arm, and a Suspender looped over said wheel, substantially as described.

6. In a11a1'ti.cial. log, the, combination with a thigh section and a lower leg section,

of a knee bolt pivotally connecting same and rigidly attached to the lower leg section, a laterally extending operating arm adjustably secured to said knee bolt, a limit pivotally carried on the free end of said arm, 25

a grooved wheel carried on thcfrec end of said link, a'bifurcatcd back-check attached to the rear of the lower leg section at one and and QB'IbIRClZQg the knee bolt and inner end of sail opcrating arm at its opposite as end, and a Suspender connected with th wheel on the free end of said link, substan-' tially as described.

7. In an artificial leg, the combination with a thigh section and a lower leg section,

of a knee bolt pivotally connecting same and rigidly connected with said lower leg section, a latcrallycxtending operating arm looped around the knee bolt at its inner end,

a set scrcw for clamping said looped por- 96 .tion on the knee bolt to set the arm at difi'ez cnt angles, a wheel carried on the outer free 7 end of the arm, a set screw for ad ust'ably positioning the looped portion on the knee bolt, and a suspender connected with said grooved wheel, substantially as described.

8. In an artificial leg, the combinatior with a thigh section and a lower leg'scction,

of a knee bolt connecting same and rigidly connected with the lower leg section, a lat- 100 orally extending arm adjustably secured on said knee bolt at one end, means for readily altering the angle of said arm with relation to the vertical axis of the log, a link pivotally carried on the frcc em if said arm, 10 8

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