A joint device of an orthosis or prosthesis or for an orthosis or prosthesis with an upper part, a lower part, a joint that comprises a joint axis, about which the upper part is mounted such that it can be swivelled relative to the lower part, and an actuator, which is designed to influence a swivelling of the upper part relative to the lower part. The actuator is mounted at an upper part fixing point on the upper part and at a lower part fixing point on the lower part. At least two joints are arranged between the upper part fixing point and the lower part fixing point, wherein the joints enable a swivelling of the actuator relative to the upper part fixing point and the lower part fixing point, and the joint each form at least one joint axis, at least one of which is not oriented parallel to the joint axis.

Medical devices in accordance with various embodiments of the present invention employ one or more coaxial screw gear sleeve mechanisms. In various embodiments, coaxial screw gear sleeve mechanisms include a post with a threaded exterior surface and a corresponding sleeve configured to surround the post, the corresponding sleeve having a threaded interior surface configured to interface with the threaded exterior surface of the post and a geared exterior surface. A drive mechanism can be configured to interface with the geared exterior surface of the sleeve, causing the device to expand.

A joint device of an orthosis or prosthesis or for an orthosis or prosthesis with an upper part, a lower part, a joint that comprises a joint axis, about which the upper part is mounted such that it can be swivelled relative to the lower part, and an actuator, which is designed to influence a swivelling of the upper part relative to the lower part. The actuator is mounted at an upper part fixing point on the upper part and at a lower part fixing point on the lower part. At least two joints are arranged between the upper part fixing point and the lower part fixing point, wherein the joints enable a swivelling of the actuator relative to the upper part fixing point and the lower part fixing point, and the joint each form at least one joint axis, at least one of which is not oriented parallel to the joint axis.

A limb prosthesis including a palm, a forearm, an upper arm, an elbow joint and a wrist joint is provided. The palm has a first pivot and a first lock set. The upper arm has a socket. The elbow joint connects the forearm to the upper arm. The wrist joint includes a first connecting rod connected to the forearm. The first pivot rotatably penetrates through the first connecting rod. The first lock set is locked to the first pivot. A first wedge surface of the first lock set contacts a second wedge surface of the first connecting rod. By adjusting a distance between the first lock set and the first pivot, a magnitude of a forward force between the first wedge surface and the second wedge surface is adjusted, such that the palm is fixed relative to the first connecting rod or rotatable around an axial direction perpendicular to an extending direction of the forearm.

Medical devices in accordance with various embodiments of the present invention employ one or more coaxial screw gear sleeve mechanisms. In various embodiments, coaxial screw gear sleeve mechanisms include a post with a threaded exterior surface and a corresponding sleeve configured to surround the post, the corresponding sleeve having a threaded interior surface configured to interface with the threaded exterior surface of the post and a geared exterior surface. A drive mechanism can be configured to interface with the geared exterior surface of the sleeve, causing the device to expand.

A limb prosthesis including a palm, a forearm, an upper arm, an elbow joint and a wrist joint is provided. The palm has a first pivot and a first lock set. The upper arm has a socket. The elbow joint connects the forearm to the upper arm. The wrist joint includes a first connecting rod connected to the forearm. The first pivot rotatably penetrates through the first connecting rod. The first lock set is locked to the first pivot. A first wedge surface of the first lock set contacts a second wedge surface of the first connecting rod. By adjusting a distance between the first lock set and the first pivot, a magnitude of a forward force between the first wedge surface and the second wedge surface is adjusted, such that the palm is fixed relative to the first connecting rod or rotatable around an axial direction perpendicular to an extending direction of the forearm.

An improved mechanism for expanding or lifting a device in accordance with various embodiments of the present invention is a coaxial screw gear sleeve mechanism. In various embodiments, coaxial screw gear sleeve mechanisms includes a post with a threaded exterior surface and a corresponding sleeve configured to surround the post, the corresponding sleeve having a threaded interior surface configured to interface with the threaded exterior surface of the post and a geared exterior surface. A drive mechanism can be configured to interface with the geared exterior surface of the sleeve, causing a device utilizing such a mechanism to expand or lift between a collapsed configuration and an expanded configuration.

An improved mechanism for expanding or lifting a device in accordance with various embodiments of the present invention is a coaxial screw gear sleeve mechanism. In various embodiments, coaxial screw gear sleeve mechanisms includes a post with a threaded exterior surface and a corresponding sleeve configured to surround the post, the corresponding sleeve having a threaded interior surface configured to interface with the threaded exterior surface of the post and a geared exterior surface. A drive mechanism can be configured to interface with the geared exterior surface of the sleeve, causing a device utilizing such a mechanism to expand or lift between a collapsed configuration and an expanded configuration.

Medical devices in accordance with various embodiments of the present invention employ one or more coaxial screw gear sleeve mechanisms. In various embodiments, coaxial screw gear sleeve mechanisms include a post with a threaded exterior surface and a corresponding sleeve configured to surround the post, the corresponding sleeve having a threaded interior surface configured to interface with the threaded exterior surface of the post and a geared exterior surface. A drive mechanism can be configured to interface with the geared exterior surface of the sleeve, causing the device to expand.

A joint device of an orthosis or prosthesis or for an orthosis or prosthesis with an upper part, a lower part, a joint that comprises a joint axis, about which the upper part is mounted such that it can be swivelled relative to the lower part, and an actuator, which is designed to influence a swivelling of the upper part relative to the lower part. The actuator is mounted at an upper part fixing point on the upper part and at a lower part fixing point on the lower part. At least two joints are arranged between the upper part fixing point and the lower part fixing point, wherein the joints enable a swivelling of the actuator relative to the upper part fixing point and the lower part fixing point, and the joint each form at least one joint axis, at least one of which is not oriented parallel to the joint axis.