706 results about "Prosthetic limb" patented technology

The hydraulic damper comprises an oil storage container, a piston is arranged in the oil storage container, and the piston divides the oil storage container into a first oil cavity and a second oil cavity; a piston rod; one part of the first circulating oil way and one part of the second circulating oil way are shared with each other, and damping parts are arranged on the parts and used for applying damping force to the hydraulic oil flowing through the damping parts; at least one first valve is arranged on the first circulating oil way and used for limiting hydraulic oil in the first circulating oil way to only flow from the first oil cavity to the second oil cavity in a one-way mode; at least one second valve is arranged on the second circulation oil way and used for limiting the hydraulic oil in the second circulation oil way to only flow from the second oil cavity to the first oil cavity in a one-way mode. The two-way damping control device has the beneficial effects that under the condition that only one damping valve is used, two-way damping control can be achieved when the artificial limb moves, and the wearing comfort and attractiveness of the artificial limb are improved.

The utility model discloses a tactile extremity structure and an artificial limb. The tactile extremity structure comprises a limb back structure; the limb abdomen structure is arranged on the limb back structure; the sensor is located between the limb back structure and the limb abdomen structure; the sensing target is arranged on the limb and abdomen structure; when the limb and abdomen structure deforms in a contact mode, the sensing target is driven to move and is sensed by the sensor. The sensor is located between the limb back structure and the limb belly structure, the sensing target is located on the limb belly structure and corresponds to the sensor in position, when the limb belly structure makes contact with other objects and deforms, the sensing target moves, the back sensor senses the movement, and therefore the limb end structure has touch sense and can sense contact. And the tactile extremity structure has a better simulation effect.

The invention is suitable for the technical field of medical instruments, and provides a pneumatic global self-adaptive ankle-foot artificial limb which comprises a rear sole and a front sole which are connected through a front and rear foot connecting piece. The pressure response assemblies are located at the bottoms of the rear sole and the front sole, and pressure changes after bearing; and the ankle self-adaption assembly is connected with the pressure response assembly through a valve communication assembly and drives the ankle to do eversion, centering and introversion motions based on pressure changes. According to the embodiment of the invention, an ankle joint inward and outward turning automatic adjusting mechanism directly driven by plantar pressure change can enable the artificial limb to adapt to complex terrains such as uneven road surfaces and lateral slopes in real time, an inward and outward turning motion mode of a physiological ankle joint in the walking process is simulated, and the gait of a user is smoother and more natural; the pure pneumatic control structure is relatively simple and light, and an external power supply pressure driving pump or a complex sensor is not needed.

Prosthetic heart valve leaflets of shapes that control bending. Prosthetic heart valves can include a leaflet frame having a generally tubular shape with attached film. The leaflet frame can define a plurality of leaflet windows with the film defining at least one leaflet extending from each of the leaflet windows. Each leaflet attachment zone on the leaflet frame may have substantially the shape of an isosceles trapezoid having two leaflet sides, a leaflet base and a leaflet free edge opposite the leaflet base. The two leaflet sides can diverge from the leaflet base, the leaflet base being substantially flat.

The invention discloses an intelligent artificial limb movement intention recognition method based on multi-modal information and a D-S evidence theory, and belongs to the technical field of artificial intelligence, mode recognition and intelligent artificial limb control. According to the method, firstly, electromyographic signals and kinematics signals of user limbs and three-dimensional point cloud information of the terrain where the user limbs are located are synchronously collected; filtering, segmenting and time domain / frequency domain feature extraction are carried out on the physiological signals, rotation correction and dimension reduction are carried out on the environment point cloud, and a binary image is generated; using a deep learning model to identify a preliminary motion mode from the physiological features and identify a terrain category from the environment image; and finally, inputting the two recognition results as evidence bodies into an improved D-S evidence theory model for decision-level fusion, and outputting a final comprehensive motion intention recognition result. According to the method, the human physiological signal and the external environment information are fused, so that the ambiguity and uncertainty of single information source identification are effectively solved, and the intention identification accuracy and adaptability of the intelligent artificial limb in different complex scenes are remarkably improved.

A prosthetic assistive device configured to attach to a distal end of a natural or prosthetic arm or wrist. The device may include a palm portion. A split hook may be coupled to a distal end of the palm portion. The split hook may comprise a first end effector and a second end effector. The prosthetic device may include a third end effector rotatably coupled to the palm portion at a proximal end of the palm portion. The third end effector may rotate about a transverse axis to pinch and unpinch, as well as rotate about a longitudinal axis to adduct and abduct. A rotating member such as a ring may rotate about a plate for adduction / abduction. The prosthetic device may include a drive assembly configured to rotate one or both of the split hook end effectors about two different axes.

A system for loading a delivery apparatus including a crimping device and a loading assembly. The crimping device having a housing including a funnel segment and an outlet in communication with the funnel segment, and an actuator configured to advance a radially expanded prosthetic device at least partially through the funnel segment and outlet thereby partially crimping the prosthetic device. The loading assembly including a support tube disposable over at least a portion of a capsule of a delivery apparatus, the loading assembly comprising an inlet end configured to be disposed adjacent the outlet of the crimping device such that the loading assembly can be axially advanced over the partially crimped prosthetic device to move the prosthetic device into a fully compressed configuration.

A method of assembling a prosthetic heart valve comprises securing a suture loop having at least first and second windings to an outflow edge portion of an inner skirt. The first and second windings are arranged in a repeating pattern of figure-eight shape curves and each winding has a plurality of first sections attached to the outflow edge portion of the inner skirt and a plurality of second sections unattached to the inner skirt. The inner skirt is placed inside of an annular frame and the second sections of the first and second windings are placed over apices of an outflow end of the frame such that the second sections of the first and second windings reside outside of the frame. The second sections of the windings are inserted inwardly through openings in the frame and attached to selected locations on the inner skirt.

The application discloses an electro-hydraulic active ankle prosthesis and a walking method, relates to the technical field of prostheses and additive manufacturing technology, and discloses an electro-hydraulic active ankle prosthesis, which comprises a motor pump, a hydraulic cylinder, a hydraulic integrated block, an accumulator group and an integrated topology instep, wherein the motor pump, the hydraulic cylinder, the accumulator group and the integrated topology instep are all integrated on the hydraulic integrated block, the motor pump is used for charging the accumulator group, the motor pump and the accumulator group are both used for being connected with the hydraulic cylinder, and the hydraulic cylinder is used for being connected with the integrated topology instep. The electro-hydraulic active ankle prosthesis and the walking method have the advantages that the motor pump, the hydraulic cylinder, the accumulator group and the integrated topology instep are all integrated on the hydraulic integrated block, so that the overall volume and weight are reduced.

The invention relates to a prosthesis socket comprising a proximal entry opening and a distal end or a distal end region and a fastening system provided there for a prosthesis component, wherein the prosthesis socket has a frame consisting of a fiber-reinforced plastic material with at least one opening, a textile which spans the opening being fixed to the frame.

The invention relates to a control method of an artificial limb knee joint. According to the technical scheme, the control method comprises the steps that a heel pressure sensor signal Ph, a sole pressure sensor signal Pf and an inclination angle theta and an angular velocity omega output by a shank inertial measurement unit are obtained in real time; when it is detected that the Pf decline rate exceeds a preset multiple threshold value of the heel pressure decline rate, dynamically calibrating an inclination angle reference theta base and calculating an offset theta cal; dividing six stages of a gait period based on the theta < cal > and the pressure signal, and calculating period duration T; a step speed-damping mapping knowledge base is constructed, and the damping opening degree in the early stage of swing is optimized through iterative learning; finally, the adjusted U value is applied in the early stage of swinging, and fixed damping is kept in other stages. The method is mainly used for improving the walking naturalness and terrain adaptability of the artificial limb at different speeds.

The present disclosure relates to the field of artificial limbs for amputees and specifically to a passive compliant wrist unit 210 for upper limb prosthesis. The passive compliant can comprise a plurality of fingers controlled by a compliant four bar mechanism. The arm is capable of extension / flexion, radial / ulnar deviation on application of a force on the snap joint. The limb is also capable of pronation / supination actions. By application of a force on an arm snap joint, the flexible wrist 216 can be adapted to perform extension / flexion, radial / ulnar deviation.

A prosthetic digit usable with capacitive panels is provided. The digit includes at least one conductive layer surrounding the body of the digit, and a non-conductive sealing layer around the conductive layer preventing direct external contact of the conductive layer with the capacitive panel. The digit may have a conductive tip pad to create a series capacitive pathway between the conductive layer of the body and the electrodes of the capacitive panel. Using the digit with a capacitive panel does not require a direct conductive pathway, e.g., a pathway between the capacitive panel and the structure of the device, the user's skin, or metallic sink.

The invention relates to the technical field of control engineering, in particular to a touch-based prosthetic hand multifunctional sharing control method, which comprises the following steps of: S1, acquiring a surface electromyogram signal of a user in real time, and identifying a motion intention of the user based on the surface electromyogram signal; s2, a finger needing to move is determined according to the movement intention of the user, the current availability of the finger needing to move is judged through fingertip touch readings, and a movable finger is determined and pre-grabbed; s3, after pre-grabbing is conducted, the movable fingers are controlled to conduct stable grabbing by calculating the grabbing force change rate of each finger at the adjacent moments; and S4, after stable grasping is carried out, the grasping power level is adjusted by executing a target activation gesture, and control over the prosthetic hand is completed. Stable grasping of the prosthetic hand, in-hand operation and one-hand multi-grasping control can be achieved.

Disclosed are prosthetic systems comprising a powered knee prosthesis and a volitional controller configured to provide control of the prosthesis to the user. The prosthetic system may be configured to enable a user to walk on smooth and / or uneven terrain and to ascend and / or descend stairs. The volitional controller may be configured in a contact state when the prosthesis is in contact with a ground surface and a no contact state when the prosthesis is lifted from the ground surface. When in the contact state, the controller may output a knee torque signal for controlling the powered knee of the prosthesis. The knee torque signal may be based on a target knee torque determined by the knee orientation and the torque measured at the ankle of a prosthetic foot. When in the no contact state, the controller may output a knee torque signal based on a desired knee position.

Prosthesis devices can include sockets having adjustable features. In one example, a socket includes one or more panels that can move outwardly or inwardly relative to a receptacle portion of the socket. The panels can be moved by tightening a tensioning line.

Aspects relate to a high-performance prosthetic attachment, the prosthetic attachment may include an articulating attachment with varying, adjustable ranges of motion, a limb connector coupled to the articulating attachment, a base connector coupled to the articulating attachment, and a base. Further embodiments of the high-performance prosthetic attachment may include at least an actuator mechanically connected to the articulating attachment and configured to adjust the range of motion of the articulating attachment, and at least a sensor, configured to detect attachment datum of a base. Lastly, further embodiments may include a control circuit, which may be communicatively connected to the prosthetic attachment and configured to receive attachment data and drive the actuator to adjust the range of motion available to the articulating attachment.

The invention provides a knee joint prosthesis and a lower limb prosthesis, and relates to the technical field of medical instruments. The knee joint prosthesis comprises a knee joint upper body, a knee joint lower body and a hydraulic rod; an offset rotating shaft is arranged on the knee joint upper body, one end of the hydraulic rod is pivoted in the knee joint lower body, and the other end of the hydraulic rod is pivoted with the offset rotating shaft, so that the knee joint upper body can drive the hydraulic rod to do telescopic motion when rotating relative to the knee joint lower body; the knee joint upper body is provided with a pivoting hole used for installing the pivoting shaft and a compression seam, the compression seam is located above the pivoting hole, the top of the knee joint upper body is provided with a connector used for being connected with the leg of a patient, and the knee joint upper body is provided with a first threaded connecting hole used for installing the connector. A locking hole is formed in the first threaded connecting hole, the locking hole penetrates through the compression seam to be communicated with the pivoting hole, a locking clamping column is arranged in the locking hole, and a locking piece used for limiting the locking clamping column is arranged at the top of the locking hole. The technical effect of improving the stability of the prosthesis is achieved.

The invention discloses a bionic ankle joint and an artificial limb, the bionic ankle joint comprises an ankle joint base and a sole mechanism, and the ankle joint base is used for being connected with a leg component; the sole mechanism comprises a front sole component, a rear sole component and at least one elastic piece, the rear sole component is rotationally connected with the ankle joint base, the front sole component is rotationally connected with the rear sole component, one end of the elastic piece is connected with the rear sole component, and the other end of the elastic piece is connected with the front sole component; the elastic component is used for providing elastic restoring force when the front sole component rotates relative to the rear sole component. The sole fitting degree is improved through multi-joint linkage, the gait stability is enhanced, the additional burden caused by uneven stress is avoided, energy recycling is achieved through the elastic piece, energy consumption is reduced, meanwhile, the pedaling effect is improved through elastic assistance in the pedaling stage, the motion characteristic of the bionic ankle joint is closer to the natural state of the human body, and the mechanical performance of the bionic ankle joint is improved. And the matching degree of equipment and human motion characteristics is improved.

The invention belongs to the field of intelligent prostheses, and particularly relates to an intelligent prosthetic control algorithm based on EMG electromyographic signals, which comprises the following steps: S1, electromyographic signal acquisition: acquiring the electromyographic signals of the forearm of a user through a multi-channel surface electromyographic sensor, the electromyographic signals being sEMG signals; s2, signal preprocessing; according to the time-frequency feature enhancement and mixed learning architecture, the system can realize more accurate and stable small sample gesture recognition, the processing capability and classification performance of the non-stationary electromyographic signals are remarkably improved, and in addition, due to the fact that deep features and discriminative manual features are fused and a lightweight network and a multi-modal decision mechanism are combined, the recognition efficiency of the non-stationary electromyographic signals is improved. A user can realize reliable and smooth gesture interaction in a low-delay and low-data-dependence embedded environment, and does not need to depend on a large amount of labeled data or complex computing resources, so that the whole method has higher adaptability and practicability.

A vascular implant, in particular a prosthetic heart valve, for providing valve function, has a stent structure with a proximal conical-convex inflow region, a distal, linear cylindrical outflow region, an intermediate transition region, and a corresponding valve arrangement. When the stent structure is in the expanded state, a higher maximum radial force exists in the inlet region in direct comparison to the lower maximum radial force in the outlet region and in the transition region.

The present application relates to an intelligent knee joint for human lower limb exoskeleton, prosthesis, or orthosis. The intelligent knee joint reproduces part or all of the biomechanical characteristics of the human knee joint by adopting a motor drive unit in combination with a controllable spring energy storage unit based on a magnetorheological damper, or adopts a controllable resistance unit in combination with a controllable elastic energy storage unit based on a magnetorheological damper, thereby helping the wearer to better reduce the burden of walking and regain or repair the walking function. The motor drive unit operates in generator mode and driver mode, and the energy recovery technology is used to reduce the power consumption of the intelligent knee joint and extend the working time of the device. In addition, the use of a controllable elastic energy storage unit based on a magnetorheological damper further reduces the energy consumption of the intelligent knee joint, while also simplifying the control difficulty of the knee joint.

The present disclosure describes self-adjusting sockets for lower limb prostheses in which each step transmits motion to a resilient resistive element coupled to an actuator configured to cycle between a rest position and an actuated position. The resistive element can transmit the motion to the actuator to cycle the actuator. Each cycle of the actuator acts through a mechanical linkage to tighten the socket around the residuum, until a desired threshold tightness on the residuum is reached. After the threshold tightness is reached, the resistive element yields and absorbs the motion rather than transmitting the motion, so that the actuator ceases to cycle on each step, preventing further tightening beyond the threshold.

The knee joint linkage control ankle joint prosthesis comprises a base and a joint head, the base is connected with a foot plate piece, a hinge shaft is hinged to the base, the hinge shaft extends in the length direction perpendicular to the foot plate piece, the joint head is connected with a support, the supporting end of the support is connected with the hinge shaft, and a hinge piece is hinged to the support. The hinge piece is arranged close to the joint head and extends in the length direction perpendicular to the foot plate piece, a joint motor is hinged to the base, an output shaft of the joint motor is connected with a threaded rod, the threaded rod extends in the length direction perpendicular to the hinge piece, and the threaded rod is in threaded connection with a through hole in the hinge piece. A driving piece is connected between the shank piece and the thigh connecting piece, the shank piece is driven by the driving piece to rotate, and a controller on the shank piece is connected with the joint motor and the driving piece. The motion performance of the artificial limb is optimized through knee and ankle joint linkage control, proper supporting force and motion resistance are provided, the dynamic response capacity is improved, and therefore the walking stability and comfort of a patient are enhanced.

The invention relates to the technical field of medical instruments and robots, and discloses an active and passive knee joint artificial limb structure and a control and reinforcement learning parameter adjusting method.The active and passive knee joint artificial limb has various working mode combinations such as complete active, complete passive and active and passive combination and meanwhile has the extremely high exercise ability upper limit and cruising ability upper limit; the invention further discloses an active and passive knee joint artificial limb control method, an active mode or a passive mode is respectively entered in different stages of human body movement gaits, and more movement modes including walking, going up and down stairs, running and the like are met. The invention further discloses a reinforcement learning parameter adjusting method of the active and passive knee joint prosthesis, gait features of the uninjured side are used as a learning target, the motion of the prosthesis joint is matched with the uninjured side as much as possible by minimizing angle errors and phase deviation, and personalized efficient customization and continuous optimization of prosthesis control parameters are achieved.

The invention discloses a gesture recognition system and method based on multi-channel mixing of EMG, FMG and IMU. The system comprises a multi-channel signal acquisition module, a signal conditioning and synchronous acquisition circuit, a data preprocessing module, a deep neural network fusion recognition module and an output interface module. By integrating a surface electromyogram, a muscle force diagram and an inertial measurement unit, synchronous acquisition of multi-modal physiological signals of the forearm of a human body is realized; a double-flow convolution-time sequence attention fusion network (DCTANet) is adopted for feature extraction and classification decision making, and neuromuscular activity, muscle mechanical response and limb movement information are effectively fused. The accuracy, robustness and real-time performance of gesture recognition are improved, and the method is suitable for the fields of intelligent prostheses, wearable interaction, rehabilitation training and the like. The system is compact in structure, supports embedded deployment, and has a good practical prospect.

A prosthetic attachment system and corresponding lock assembly are provided for connecting a distal end of a prosthetic liner to a distal end of a prosthetic socket, by combining vacuum suspension and mechanical suspension. An attachment pin extends from a distal end of the prosthetic liner. A connector assembly secures to a distal end of the prosthetic socket and is adapted for receiving and locking to the attachment pin. A lanyard assembly has a first end secured to the connector assembly and a second end extending outwardly from the distal end of the prosthetic socket and adapted to secure to an exterior surface of the prosthetic socket by an external securing system.

The present disclosure describes sensor devices that can be readily integrated with prosthetic devices to provide sensing of force and torque applied to the prosthetic device during use. The sensor device includes an adaptor section that readily connects to standard prosthetic components and a base section. The base section has a deflectable portion and a fixed portion. Cantilevers in the deflectable portion house magnets and corresponding Hall effect sensors are housed in the fixed portion. When axial and / or torsional forces are applied, the cantilevers deflect relative to the fixed section and the Hall effect sensors provide a corresponding output that correlates to the axial and / or torsional forces applied.

The claimed group of inventions relates to a field of anatomical engineering, and it relates to a mechanical finger and an actuator therefor, which may be used in imitators and prostheses of upper limbs. The mechanical finger is a structural element that performs a gripping function, consists of movable phalanxes, elements for modifying their position relative to each other, and a driving rope that is connected to a lead nut that is, in turn, intended to interact with an electromechanical actuator that transmits a force to the mechanical finger. According to the invention, the rope is fixed on the lead nut and divided into two portions which are arranged symmetrically relative to a sagittal plane of the proximal phalanx and laid on the guides. Therewith, cavities are provided in locations of the rope which are configured to receive loops of the rope, and a length of each of them equals to a travel length of the lead nut. The actuator is a power module that is aimed to drive and to control a movement of the mechanical finger. It consists of a motor reducer having a front shaft with a lead screw mounted thereon, the lead screw is configured to be coupled to the lead nut, and an encoder that is configured to enable a connection to the contact board of the artificial wrist, thereby powering the motor reducer and transmitting pulses. The actuator and the mechanical finger are individual modules of the artificial wrist which together form a single module.