US 2513134 A
Description (OCR text may contain errors)
June 27, 1950 1 H. BARGHAusx-:N 2,513,134
ARTIFICIAL LIMB KNEE STRUCTURE v Filed July 28, 1949 2 Sheets-Sheet l #Jal- ATTORNEY June 27, 1950 H, BARGHAUSEN 2,53,134
ARTIFICIAL LIMB KNEE STRUCTURE Filed July 28, 1949 2 Sheets-Sheet 2 @Mm @112; 5M@ Wm Y ATTORNEY Patented June 27, 1950 Avplieauongmly 28,
` 6129111115. (0;. 3&2)
wearers, t iS @punazsebf the present invniiQil ent inf Said 50 1949, sril No@ 107,268
Figure 6 is a front elevation of a knee struc- .I
ture, a right knee being shown.
Figure 7 is an enlarged detail section trating the brake shoe and its attachment to the presser bar.
In the example of embodiment herein disclosed, the improved knee structure is shown as incorporated in an articial limb including .theusual thigh section 5 and shank section. 6
pivotallyconnected by. akne'e.` bolt 'I whichpasses through the usualside arms 8 which are riveted or otherwise secured as vat l9 to the sha-nk section.: .The knee structure includes a knee plate I Il, the-lower face of which lies in the same hori- .zont'al' plane with the axis of the knee bolt, and
the plate includes an upstanding collar or flange II which` is circular inhorizontal vcross section -and,y adjustably fits within a circular .bore I2 `formed in .the lower end of `the thigh section. 5. It" will be `readily apparent that during the .fit- -,ting of the limb the knee structure and the attached .shank section may, be turned axially` within the thigh section bore I2 .in order to adjust the direction of projection` of` the attached foot'V and properly lineup the limb, and the .selected adjustment maybe secured by use of the screw bolts I3 which pass through holes I4 in the thigh section and elongated slots I 4a `formed in the knee plate collar or flange I l.
Theknee plate I .also includes two half cylindricaldepressionsv or recesses .I 5'which are opposed by cast extension portions .I6 terminat- .ing inr adjuster vears I'I whichare spaced from theplate in the. manner clearly illustrated in Figures k1, 2 and -4 of the drawings. The depressions I5 and -the extension portions I6 form bearings in which to receive split bearing sleeves I8 which may be formed. of ber or comparable acceptable bearing material in vwhi'chto receive the knee bolt 1. A longitudinal screw I8 extends through abore in each adjuster ear I'I and into a receiving tapin theplate I0, and oneach said screw is included and adjuster head which engages the respective ear I1 so that upon ad-` justment of the screwinone direction or anotherthe respective bearing sleeve I8 may be ,contractedor permitted to expand so .as to vary the friction appliedfto the knee bolt and effective to resist free turning thereof within said sleeves.
The central portion of the knee plate is cut away in the manner vclearly illustrated Vin Figures 2, 3.and 5 of thedrawings in order'to accommodate the knee check which is generally designated ZI, and said knee check includes a hub 22 which is split and securely clamped by a screw 23 about the knee bolt 1. Thus it will be apparent that the shank section,'the knee check 2I and theknee bolt 'I swing in unison. The knee check is secured at the front as at 24 lWithin the shank section E, and also at the rear as at 25 within said shank section. 'This knee check is shaped in the manner clearly illustrated in Figures 1, 4, 5 and 6 of the drawings to provide a front check stop 26, a rear check stop 21 and a cap clearance 28. The front check stop 26 is engageable with a bumper l29 mounted as at 30 on the knee plate I0, and the rear check stop 21 is engageable with a bumper 3I mounted as at 32 on said knee plate. Engagement of the front check stop 26 with the front bumper 3B limits swinging movement of the shank section in the forward direction at the position illustrated in Figures 1 and 4, and engagement of the rear check stop 2I with the rear bumper 3l limits swinging movement of the shank section in the rearward direction in the manner indicated in dot and dash lines in Figure 4.
A knee cap 33 is Secured to the knee plate f I0 by screws 34, and aligning tapered dowel pins 35 project from the upper edge of the knee plate and are engagea-ble in aligning recesses 36 provided in the knee plate IB. The engagement of the tapered pins 35 in the recesses 36 serves to maintain the meeting edges ofthe knee plate Yand the knee cap in alignment, and should there be any springing of the kneecap during casting or hard usage, said aligning pins and recesses will serve to draw the parts into yproper cooperative relation and alignment. It will be apparent Iby reference toY Figure 6 that the knee cap lalso includes apertures 38 through which the tension adjuster screws I9 may be manipulated.
T-he center openingin the knee plate I0 also 'clears the crank extension 39 provided on the "knee check 2 I, said extension being equipped with a roller 46 under which passes bight of a control ,strap 4I depending from the usual belt or other control harness (not shown). It is well known :in the art that the connection of the strap 4I with Athe crank roller 4UV enablesthe wearer of thelimb tto. exert'an upward `pull on the vcrank extension which iseiective to throw the rshank section forjward during Walking, and by this manner of controlling the swinging movement of the shank fsection, in conjunction with proper control offthe friction, the wearer of the limb is enabled to walk with the artificial limb with easefand lcom- `fort. A
' It will be noted by reference to Figures 1, 3,'4 "and 6 of'thedrawings thatV the knee plate I0 includes an upstanding outer abutment flange 42,
and in this flange and in the collar or ange II a slotway, 4.3 is provided in which an adjuster ,wheel 44 is rotatably conncd with its periphery ,projecting only slightly vthrough the outside of the slotway inthe mannerV clearly illustrated, especially in Figures Zand 3. The captivewheel 44 is threaded on an adjuster screw V45 which.
passes through a smooth bore 46 in the knee' plate II) in line with one of the laterally disposed friction bearings. At the' side at which the adjuster wheel 44 ismountedfthe kneeplate is' equipped with an anchor lug 41 to. which a heavy but flexible presser bar 48 is anchored at one end as at 49. The adjustably anchored presser bar is` apertured as at 50 to receive a" reduced hub extension 5I of a brake shoe 52, preferablyformed o f bronze. The reduced hub extension 5I is floatably secured to the presser bar '48 and within the aperture 5l by means of-a screw 53, and the outerface of the brake shoe. 52 which opposes thepresser bar 4.8
preferably is curved aslat 54. It' will .be apparent by reference to Figures 4, 5 and 7 of the drawings that the inner face of the brake shoe is curved, as at 55, on the same radius as the outer surface of -the knee bolt 1-so as to lie snugly -thereagainst for braking contact therewith', and said face is lubricantralonet omasta lubricanteand:aigri or:;other rsuitabjle: nommetaliicixnateria nated vwith :graphite-i .":Flhezftllerrmay face, 'i the zidea .being itc oprovideiiust the right amount of.:frictionandyetpassuresagainii'ellline- Itt isv .to :be: understood; however; ,that f s thelmail) .braking actionorffriction-appication'd provided by the. metal:to..metal*con-tactA 'b'etvveexr.thev brot-125e shoesurface nanditlnekneetbolt'1.
It will; beia'pparent by;refereneeltliiigutefthat the presserv bari 48.1'sprovided fwithi anzraperture l forclearingtheadiustertsorew tfandfthevhed 2'0 thereof: .associatefdrnzithithefrespectiyebearing ear extension :I 1, rand 2 afscompresson 15m-ing# '.533
surrounds :said iscrewibetweenrtheadjagent ar y,I 1 andrthe opposing? facey `:of-:the bar1:.4;8 zandrSer-ve$ toconstantly urgezthebarem adirection for- -displacing the :brake shoe; .522 from rits,..1fr,itf.ion X1132.11:
trolling contact with the knee boltrl. finie-tadreadily. interstate man refinements for controlling the swing of the shank section in accordance with the gait of a particular wearer or demands of varyingclimatic conditions will section and adjusted therein to suit the requirements of the particular wearer. f It is of marked advantage to provide the efcient checking of the shank movement both inthe forward and rearward direction, and the simple finger Wheel adjustment 44 which enables the adjustment of the frictionapplied tothe kneebolt by the wearer himself, without the use of special tools and without the necessitiT of seeking a place of privacy in which to make the manipulation."
While one form of the invention has been shown for purposes of illustration it is to be clearly understood that vvarious changes in the details of construction and arrangement of parts may be made without departing from the spirit and scope of the invention as defined in the appended claims.
n l. In an articial limb, a thigh section, a shank section, means forming a pivotal connection between said sections and including a pivot bolt movable with one said section, and means carried by the other of said sections for applying variable frictional resistance to relative movement of said bolt and comprising, an elongated presser bar anchored at one end on said other section, a brake shoe attached to said bar and engaging the knee bolt, .9, screw attached to said bar, and a nger wheelheld captive and rotatable onv said other section and threadable orrsaidfscrewwherebyrretate Ofr'therwhelfwilil j `snwturfe @einen molaire ake shoe comprises ai twill 'be apparent that by adjusting-the screws 1 thigh SQSLQEI ahmk .aandgleansior aaai Qt reaction between aid sections and including-aikneeplate secured to thethigh section and having knee bolt bearing means thereon, and a knee bolt secured -to and movable with the shank section and rockable in said bearing means, said bearing means having an opening therein exposing an external surface of the knee bolt, an elongated presser bar anchored at one end on the knee plate, a brake shoe Aattached to said bar and engaging the knee bolt through the bearing means opening, a screw attached to the bar, and a finger wheel held captive and rotatable in a slot in said plate and extending slightly through the slot beyond the peripheral edge of thev plate.
for finger manipulation and threadable on said screw whereby rotation of the wheel will impart longitudinal movement to said screw and through it movement tothe brake shoe toward or from said bolt to increase or diminish frictional resistance to movement of the bolt.
6. Artificial limb structure as defined in claim` 5 in lwhich the knee bolt bearing means comprises a pair of laterally'spaced split .bearings in one of which the brake shoe receiving opening is formed, there being included means for individually adjusting the bearings to apply movement resisting friction to the knee bolt with relation to which the finger wheel manipulation constitutes supplementary friction adjustment.
7. Artificial limb structure as defined in claim 5 in which the knee bolt bearing means comprises a pair of laterally spaced split bearings in one ,ofwhich the brake shoe receiving opening kis formed, there being include means for individually adjusting the bearings to apply movement resisting friction to the knee bolt with relation to `which the finger Wheel manipulation consti- 7' 5 'iny whichl the fknee boltv bearing means compri'sesapair-*bf laterally spaced split bearings in one of which the brake shoe receiving opening is formed, there being included a screw means for adjusting each bearing to apply movement resisting friction `to the knee bolt, one said screw means passing through an aperture formed in the-presser bar, andthere being included a compression spring interposed between thev presser bar and the adjacent ybearing and about said one screw means and eiective to constantly tend to move the bar in a direction for relieving the pressure of the brake'shoe against the knee bolt. Y 9. Artificial limb structure as dened in claim 5 finA which the knee plate lhas an upstanding circular collar adjustably mounted in a bore in the lower end of the thigh section so that vby turningy the collar in said bore the angular relation of the thigh and shank sections can be varied.
l0. Articial limb structure as dened in claim 5 in which the knee plate has an upstanding circular collar extending into and turnable in abore formed in the lower end of the thigh section, said collar having' longitudinal slots therein and being secured to the thigh section by bolts passing through said slots andl through apertures in the thigh section and permitting adjustment of the collar in the bore effective to vary the angularrela'tion of the thigh and shank sections.
8 411'1.. Infanf' articial ."zlimb, a thigh section, .a shanky section; a, 'knee `'forming a pivotal 'connectionrbetvveenisaid sections, said knee including a pivot bolt,a knee `plate secured to the thigh sectionv and having a="centrally disposed control device accommodating opening, control devices operablein part insaid opening and including a knee' che'ck'securedfto said shank'section, and a control strap .bight receiving crank, said knee plate including a `knee bolt bearing at each side of the center opening, one said bearing having anl opening therein through which the knee bolt is exposed, and variable vfriction applying means lcomprising a brake shoe projecting through said bearing opening into contact with the knee bolt, and means for applyingl the shoe to the knee bolt'with variable pressure including an adjuster Wheelmounted,on` the knee plate and extending a' limited vdis'tar'ice'outwardly therefrom for finger manipulation.'l y
' f "L'O'UIS HERMAN BARGHAUSEN.
REFERENCES CITED ,The lfollowing reierences are of record in. the Vi'lle of this patent:
V"Han'ger" 'v Oct. 26, 1948