DEV0002115MA - Artificial knee joint - Google Patents

Description

Patent attorney ban ₉ the 28 »7.50

Div Wolf Müller

B ο η η

BacEsfFo 5

Applicant;

"SanTiatshaus Vogel
B a η η η Hansaeck

Inh _D ; Heinrich Vogel

Bonn

Uassiusgraben 31-33

Patent application

Artificial knee joint"

The invention relates to a novel linriohtuag of artificial limbs for amputees thigh, even if = beholfenen · People enables safe walking ma eir / the ·. "good stability guaranteed *

It is known to form the knee joint artificial G-Iieder with SWEi axes, the axis ais a partial bottom "leg and the other in the two axes Oberscheiikelteil liegt'tiiiä by fixed tabs together la Ver tying stand." Knee joints of this kind are been designed so that when an outstretched limb, the upper shaft behind the lower Jlchse was "Padurch but it is clear both in the state and at a certain GREHEN =: ismer far.

Unsiclieriieitj causes great difficulties for unskilled patients "

Eriindmigsgemäß such a knee joint is the knee joint with double-axis thereby improving Tresentlich that the two axes and mounted in such artificial G-Iiedteile are so guided against each other at an outstretched ₅ that link the upper axis located in front of the lower lchse "

In order to facilitate and improve the leg guidance and the so-called dangling of the lower leg part, reduce the necessary amount .. are, according to the further invention, stop pieces provided with padding .provided to which the connecting lugs between the two axes are placed in all flexion positions »Tn In these positions, only the lower joint axis is effective, while the position of the tab on the thigh Partly limited by these stop pieces v? ird * Only when the limb is fully extended do the tabs rise from the stop pieces by a certain amount away-

Since the patient with a knee joint according to the invention has a much better contact with the ground,

could LiJJ _n unpleasant shock sensations occur "To avoid this, both the lower leg part ™ also installed as part of the thigh of the artificial limb laugh soft-elastic Dämpfungsi., which come into contact in stretching the limb." In this way, all impacts "that arise from the stretching itself" are also absorbed without any further action

It is particularly expedient ₃ thigh part a Fiihrungsfläche and the lower leg part of a einstellbare- with this cooperating brake surface, such as a strap of leather e "to provide similar * ^; This gives the possibility of adjusting the frictional resistance of the joint to any desired value . Unsafe patient _s to avoid the beginning of the tape more loosely Sinstellen to the alleged obstruction by moving heavy knee * 'Trotsdem is the standing and walking security as a result of the precise guidance by the two axes substantially better than all previously known such devices. If, as a result of getting used to them , they feel more secure , the tension will later increase, thereby reducing the. Gang neck is safer and more natural and the adjustment to the walking style of healthy people is guaranteed to a degree that has not been achieved before.

" In addition , the tensioning device • makes it possible to activate the tensioning strap during prolonged use by simply pulling a screw back out of the ug Ie i che η '"

To further increase comfort, a damping piece is attached to the lower part of the lower leg ₅ which is resiliently supported by a guimni cushion and only comes with the joint when the joint is strongly flexed. a correspondingly recessed flip-flop on the thigh is in contact ^: kojamt *

Yieitere details of the invention are to the attached drawing _s explained that an exemplary sb ei play in different representations shows "

Fig »: 1 is a side view of the joint in flexed and

Fig ₀ E in the stretched position;

Fig; 3 is a vertical section through the joint 'and Fig ₀ ' 4 is a cross-section through the lower leg part with the tensioning device for the leather strap »

With 1 the lower leg part is designated and with 2 the thigh part 3 is the lower axis, which is attached to the Unter ™ seheiifcelteil ,, and 4 the upper axis _j die

goes through the thigh part ο Both axes are connected on both sides with a tab 5, which is slightly indented in the middle and rests against a padded stop piece S with the indentation «, 7 is a locking screw that secures the joint 3 against unintentional Loosen protected lit 8 the fittings are designated ^ which carry the joints 3 "These are only connected to each other via the lower leg part" while the axis β is not continuous "but only consists of the two opposing joint pieces 3 =. With 9 a strip of leather or similar material is denoted which is stretched over the UnterschenkeIteil of time and served as a braking surface for the .entsprechend elaborated thigh portion 10 is a soft-elastic base _3, for example made of felt ₅ are still using a sponge rubber reinforcement Il _s where it rests on the inside of the thigh part, it can be provided.This is held in place by a screw 12 in the lower leg part, 13 and 14 are pads _5, for example made of mushroom or rubber _y which are attached to the thigh part and when the limb is stretched out against the padding 10 and thus allow shock to be absorbed. The fact _s that the band 9 between these paddings

Is ührt Irindiirchgef that Bioßdämpfende Wirtung affect the upholstery · 10/13 and 14 in no way ₀

With 15 is a guide surface. DezelGhnet _i the thigh part a üb is made and the Gelenkbewegimg hewIrkt _i5 set by Yeimnderung the Bandspanramg together with the tape a slight braking spell _G To this stunt not be air strongly Iassen _s' is the area- 15 functional polished "With 16 is a Mschlagstücky articulated at the upper rear end of the Uüterschnkelteils. for example from. Wood, referred to, which -has a padding 17 and an engaging into a slot of the 'Anschlagstiickes 16' Gismmiki SEN 18 and resiliently um.die axis $ 19 is stored drohbar · "This Anschlagstiick works at strong joint is articulated with one of the Obersahenkelteil milled abutment face 20 together and results in a soft stop for the by diffracted Geleak _s Jas Spamiband 9 i £ 't at the front · the UnterschenkelteiIs by a Schlits 21 hindurch- .geführt and by a screw with washer 22 in a metal eyelet 2?> retained? the actual attached to a Mutterstüok ₀ - a bolt & with Gevi in de 24 serves for controllably adjusting the Eandsparmung "at 27 am üatörsohenkelteil firmly clamped the other end of Cpannbandes using a KLemrrplatte and a screw"?

The padding 10 BEZW "13 can also be provided with incisions Weraen _j in the clamping band lodges, so that the upholstered surfaces come in the rest directly in contact with each"

The mode of operation of the device according to the invention can be clearly seen _{from a comparison of Ibb 0 1 and 2 0} Essentially, only the axis 3 acts as a joint _ff during the movement of the tabs 5 relative to the thigh part through the stops 6 ₃ which are in the lateral retraction of the will appeal lax limited "only on stretching the limb - as shown in Figure _s 2 - Tiirkt the axis 4 articulated, approximately from the moment i * o the axis 4, advancing before the axis 3 * This lift the plates 5 by a small amount veil the padded attacks β from, -As shown clearly in Figure "2 ο in this way, the limb in completely extended position by a small amount relative to the maximum length shortened the diffraction, only by overcoming a low resistance is achieved - ₃ resulting from the toggle action »This ensures particularly good stability with the least amount of fatigue, would be nd the Gehbe ^- impaired Wegusg in any _way? but also safer designed Wirde

For further clarification, it should again the go-V or gear with the artificial limb in the context described, First, one rotational movement is carried out from the bending out of the lower axis _13. At the same time herewith Tfird the upper Aohse upstream the lower joint shifted sets in this phase of the movement the foot rests on the ground, and now the sliding movement in the upper joint begins. The forward displacement of the upper and lower axis ensures safe walking. The elastic front stop replaces the ankle joint missing in an artificial limb braking BEZW ₀ sliding _s sonie the resilient stop for the flexion damping surfaces giving the joint an overall Bewegunpcf Orm _5, the natural movement when organic knee joint is best matched "particularly important here is that by the inventive arrangement of the two axes in the opening phase, d ₀ h _o if given done ugtem joint ₅ a shortening of the leg by about 12 ~ 13 mm ,, By shortening the patient looped into the swing phase - not with his foot on the floor and does not need the weight laterally · good leg out au moving ₃ but a healthy man can walk perfectly upright,

Yaciitig it is auchj that the device according to the invention apply regardless of the Ordinance on Mensciien different gaits .Application Icann ₀ Hian different bekv. borrowed three gaits5 in the first gait the foot is put on with the knee extended and when unwinding over the ball of the knee the knee joint is a bit overstepping _a This gait is found in all things in people with so-called saber legs Unwinding in a stretched manner, while the third gait involves both sitting down and unwinding with the knee bent ₀

The first gait _{j is} the I name ^{5 in subject therapy;} _? ing31beinste 11 performs clothing "falls in the present state of development of the Eunstgliederbaus Tellig continue - But whether mocked d ° r patient at di @ aweite or third gait to the expert ibereitet in impassung a Eunstgliede with erfinciingsgemäßen means no Difficult wedges. since in the latter gaits the lot from the hip joint to Infsatzstelle of the foot automatically by an ETR two Enieachsen sets., and _j while in the second line against the Ioi from Hufτgelenk! through the Jrinterc Enieachse to Iiitte of pUTES and the third gait by the front knee axis to the ball of the foot »

The construction of the artificial limb according to the invention is very simple »All parts, both The axle joints as well as the upholstery, stop surfaces and the brake band can be easily exchanged without any effort held.

Claims (1)

Claims Device on artificial limbs for thigh amputees with double knee joint axis, thereby characterized in that the two axles are mounted in such a way and the structural link parts are so opposed to one another are guided that when the limb is extended, the upper axis is in front of the lower axis, SinriGhtung according to claim I _j characterized in that there are provided with padding provided Ansehlagstücke, rest against the connecting strips between the two axes in all flexed positions. Device according to claims 1 and 2 _}, characterized in that soft-elastic damping surfaces are attached to both the lower leg part and the thigh part of the artificial limb, which come into contact with each other when the limb is kneaded. 4) Device according to claims IS ₈ characterized in that the thigh part of a Fiilirimgs- = Pl © and the UnterscJienkelteil an adjustable in its SPAI Mmg band made of leather-like cn ο is mounted as a braking surface " 5) Device according to claims 1 - 4, characterized by a damping assembly hinged to the lower leg piece, which is resiliently supported by a rubber pad and, when the joint is strongly flexed, comes into contact with a correspondingly recessed lynch joint / * & * a thigh piece * The patent attorney;