US97647A - Improved artificial leg - Google Patents
Improved artificial leg Download PDFInfo
- Publication number
- US97647A US97647A US97647DA US97647A US 97647 A US97647 A US 97647A US 97647D A US97647D A US 97647DA US 97647 A US97647 A US 97647A
- Authority
- US
- United States
- Prior art keywords
- knee
- pivot
- foot
- heel
- cord
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 210000002683 Foot Anatomy 0.000 description 22
- 210000003127 Knee Anatomy 0.000 description 14
- 210000002414 Leg Anatomy 0.000 description 12
- 210000000689 upper leg Anatomy 0.000 description 6
- 210000000474 Heel Anatomy 0.000 description 4
- 210000003371 Toes Anatomy 0.000 description 4
- 210000000629 knee joint Anatomy 0.000 description 4
- 240000000541 Samanea saman Species 0.000 description 2
- 210000001226 Toe Joint Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2/00—Filters 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
- A61F2/50—Prostheses not implantable in the body
- A61F2/60—Artificial legs or feet or parts thereof
- A61F2/64—Knee joints
Description
i" cord and foot.
-1 "1 y tm SAMUEL B: Jnvvnrr, or LAcoNIA, NEW HAMPSHIRE.
lfattersllatcnt No. 97 ,647 lated December 7, V15569.
mpnovnn ARTIFICIAL Lne.
flo allivhom `t'tmag/ concern Y Be it known .that I, SAMUEL B. Jnwn'rr, of' La- 'conia,.in the county of Belknap, and YState of New Hampshire, have invented a new and useful Improvement in Artificial Legs; and I do hereby declare that the following is a full and exact'description thereof, reference being had to the accompanying drawings, and to .the lettersof reference marked thereon. x My invention consists of a peculiar link for attaching the heel-cord to the thigh, without interferir] g with the knee-joint.
. Figure 1 i's a side view ofmy improved leg.
. Figure 2 is the same, partly dared. Y
Figure 3 isa section of the sa1ne.-
Figurel is a view showing the motion of the heel Figure 5 isacross-section of the foot.,
v Figure 6 is a detached view of the toe.
Figure 7 is a detached view of the link for heel-cord. Figure Siska bottom view of the foot, showing the line of travel.
In the'construction' of my improved artificial leg,r thethigh, leg, `and foot may beof the usual general form, with the kneepivot, ankle-pivot, kneefcords, and
toe-cord or spring, all `arranged in the ordinary manner, as shown in the accompanyingdrawings,iig 2, and 3."
r .'At apoint, say' aboutifive-eighths-of an inch for'iirarh and above the knee-pivot A, a bolt is inserted throughthe thigh, as seen at B, fig. 3.
When the `leg is extendeug-a line connectingthe knee-pivot and the bolt B, would stand at about an` angle of forty-ve degrees from a vertical or a horizontal line.
, Upon this bolt B is swung a link, D, through which the 'knee #pivot passes, without touching the same.
" This link isvery broad, in order to let the knee bend y or` extend, without interference with the knee-pivot,
pas shown in figs. Zand 4.
rlhe heel-cord C, I make very rrn and inelastic, so as to bear a great 4strain without stretching, and I attach this cord to the link D; By thisarrangement it will be seen that the flexion of the foot, and conse-f Thefoot acting like a lever," and-the heel being the short arm of the lever, about one-third vof the length of the foot, the strain upon the heel-cord may amount l -to live hundred pounds or more, according t-o the Weight of the person resting ontthe foot. Therefore, the heel-cord acts as a most powerful extensor4 of the knee, and it is impossible for the knee-joint togive' `way and let the patient fall.
The knee-pivotV and thepivotwhich connects or A' attaches the heel-cord or link D to the thigh, are placed in suoli relation to eaehotherthat the heel-oordnot only holds the leg when completely orl nearly extended, but thecord also may act as anextensor, until the knee is bent to an angle of forty-ve degrees, or to the dead centre.
As theknee is bent, the point B travels through lthe arc of a circle, as shown in broken lines in tig. 4. It will be .seen that the point B first rises in passing ,this arc, so'as to draw up the-heelatthe centre of the are, and then descends until it reaches the point B',
front of the knee-pivot to the rear of the saine, as the knee bends,`andthen returns again to the front lof the knee-pivot as'the leg is extended.
During this motion, the link D transfers the point B from side to side-of the knee-pivot, without any ini terference, as is clearly seen in lig. 4.
lhe` hinge of the toe-joint is made to conform to the shape of the natural foot.
Fig. 5 is a section of this joint, showing atrans'versesection of the foot and the pivot'E; Thehinge is so moulded to the form ofthe foot as to make no cavity '01"projection, whether the toe is flexed or extended.
I set the knee-pivot and anklelpivot nearly parallel to each other, so as to prevent the knee from turning outward as the knee is bent. Thus the ankle-pivot is set obliquely to the central vline of the foot, and at right angles to the line of travel, vas shown in fig. 8.
Having thus described my invention, I claim- The link I), substantially in purposes set forth.
,. S. "Bl JEWE-I'B Witnesses: y i
DANIELlBnEED i l WM, H. SAMAN.
the, manner and for the 'I
Publications (1)
Publication Number | Publication Date |
---|---|
US97647A true US97647A (en) | 1869-12-07 |
Family
ID=2167108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US97647D Expired - Lifetime US97647A (en) | Improved artificial leg |
Country Status (1)
Country | Link |
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US (1) | US97647A (en) |
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0
- US US97647D patent/US97647A/en not_active Expired - Lifetime
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