Swivel connection between two parts of an orthopedic technical aid
First Claim
1. A swivel connection provided between two movable parts of an orthopedic device comprising at least four articulation members forming a plane kinematic articulation chain and exhibiting a polycentric swiveling characteristic consisting of translatory and rotatory components, wherein a swiveling movement of at least one articulation member is limited in at least one swivel direction by a swivel stop and the length of at least one articulation member is variable by action of an external force.
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Accused Products
Abstract
The invention relates to a swivel connection between two parts of an orthopedic technical aid, for example a prosthesis or orthotic device, with an adjustable, inherent articulation stability, consisting of a plane kinematic articulation chain with at least four articulation members and a polycentric swiveling characteristic composed of translatory and rotatory components, the swiveling of at least one articulation member being limited in at least one swivel direction by a first swivel stop. For improving the function, it is proposed that at least one articulation member should be designed in such a way that its length can be altered under the action of an external force.
104 Citations
18 Claims
- 1. A swivel connection provided between two movable parts of an orthopedic device comprising at least four articulation members forming a plane kinematic articulation chain and exhibiting a polycentric swiveling characteristic consisting of translatory and rotatory components, wherein a swiveling movement of at least one articulation member is limited in at least one swivel direction by a swivel stop and the length of at least one articulation member is variable by action of an external force.
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3. The swivel connection as claimed in claim further comprising a resistance device counteracting said length alteration.
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5. The swivel connection as claimed in claim wherein the swivel stop is adjustable.
- 7. The swivel connection as claimed in claim wherein the maximum extent of the shortening of the articulation member or of the displacement of the articulation point is limited by a length stop.
- 15. A swivel connection provided between two movable parts of an orthopedic device comprising a plane kinematic articulation chain having at least four articulation members and exhibiting a polycentric swiveling characteristic consisting of translatory and rotatory components, wherein a swiveling movement of at least one articulation member is limited in at least one swivel direction by a swivel stop and the length of at least one articulation member is variable by action of an external force, wherein a first part of the orthopedic technical aid constitutes a thigh prosthesis, a second part constitutes a lower leg prosthesis, and a four-membered articulation chain constitutes a knee joint, whose two articulation members connected securely to the thigh prosthesis and lower leg prosthesis, respectively, are connected to one another by a third, extensor-side coupling, articulation member used for setting the extension position and by a fourth, flexor-side couplings articulation member at articulation points, wherein the length of said fourth, flexor-side coupling, articulation member is variable in a spring-elastic manner under load, and wherein the articulation point connecting the fourth, flexor-side coupling, articulation member to a lower articulation member is arranged longitudinally displaceable within the lower articulation member and can be fixed in a desired position.
Specification