89 results about "Prosthetic feet" patented technology

Embodiments can relate to a prosthetic foot system. The system can include an ankle joint housing co-locating a rotation sub-assembly, a torsional shock absorbing sub-assembly, and a vertical shock absorbing sub-assembly. The system can include a foot component attached to the ankle joint housing. The system can be configured as a co-designed architecture to functionally integrate at least two functions of: (i) torsional shock absorption, (ii) multi-axial motion with stiffness modulation in single gait cycle, (iii) active dorsiflexion, and (iv) vertical shock absorption by causing the at least two functions to operate in concert.

A prosthetic foot includes a base spring, a top spring assembly, a connector assembly, and a heel cushion. The top spring assembly includes first and second spring members, and first and second bond connections. The second spring member extends parallel with and spaced apart from the first spring member. The first bond connection is between distal ends of the first and second spring members, and the second bond connection is between a distal end of the second spring member and a top surface of the base spring. The top spring assembly has a first portion arranged horizontally, and a second portion arranged vertically. The connector is connected to a proximal end of the top spring assembly to connect the prosthetic foot to a lower limb prosthesis. The heel cushion is mounted to the base spring at a location spaced forward of a heel end of the base spring.

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.

A prosthetic ankle joint used with a prosthetic foot to allow for a non-linear spring to be used for energy absorption and return capacity. Specifically, the ankle joint comprises a main body that connects to the shank of a prosthetic foot using mounting bolts that further connects to a pyramid adaptor using a non-linear spring. The use of a non-linear spring as an attachment member allows for movement of the attachment point in relation to the foot while retaining the added benefits of a conical spring and the nonlinear compression it has. The non-linear spring of the present invention is preferably a progressive rate spring and is preferably conical but may other shapes that increase stiffness with deflection. The spring rate is determined by the weight of the patient and their activity level.

A prosthetic ankle joint used with a prosthetic foot to allow for a non-linear spring to be used for energy absorption and return capacity. Specifically, the ankle joint comprises a main body that connects to the shank of a prosthetic foot using mounting bolts that further connects to a pyramid adaptor using guide pins and a non-linear spring. The use of a non-linear spring as an attachment member can also allow for a multiaxial movement of the attachment point in relation to the foot while retaining the added benefits of a conical spring and the nonlinear compression it has. The non-linear spring of the present invention is preferably a progressive rate spring and is preferably conical but may other shapes that increase stiffness with deflection. The spring rate is determined by the weight of the patient and their activity level. Complementary teeth are alternatively available to prevent rotation.

The invention discloses a three-degree-of-freedom ankle joint artificial limb with a gear mechanism. The three-degree-of-freedom ankle joint prosthesis with the gear mechanism comprises a prosthesis sleeve; the driving device assembly is arranged in the artificial limb sleeve and connected with the artificial limb sleeve; the gear movement assembly is arranged in the artificial limb sleeve, and the gear movement assembly is meshed with the driving device assembly; one end of the magnetic damping connecting device is connected with the artificial limb sleeve; the prosthetic foot is connected with the other end of the magnetic damping connecting device; wherein the driving device assembly is used for driving the gear movement assembly to move, so that the three-degree-of-freedom ankle joint artificial limb with the gear mechanism has three-active-degree-of-freedom movement; the magnetic damping connecting device provides different damping forces by changing the magnitude of current, and is used for supporting and keeping balance. Through cooperation of the driving device assembly, the gear movement assembly and the magnetic damping connecting device, three-active-freedom-degree movement can be achieved, and therefore the movement controllability and flexibility of the artificial limb system are improved.

A prosthetic foot includes a base spring, a top spring assembly, a connector assembly, and a heel cushion. The top spring assembly includes first and second spring members, and first and second bond connections. The second spring member extends parallel with and spaced apart from the first spring member. The first bond connection is between distal ends of the first and second spring members, and the second bond connection is between a distal end of the second spring member and a top surface of the base spring. The top spring assembly has a first portion arranged horizontally, and a second portion arranged vertically. The connector is connected to a proximal end of the top spring assembly to connect the prosthetic foot to a lower limb prosthesis. The heel cushion is mounted to the base spring at a location spaced forward of a heel end of the base spring.

A traction system for a mobile support device, such as a prosthetic foot piece or a crutch, includes a chassis, a latch assembly, and a strap. The chassis is couplable to a distal end of the mobile support device to extend underneath a bottom side of the mobile support device and the latch assembly. The latch assembly includes a front catch and a rear catch, both of which are securable to a top side of the mobile support device, the front catch being closer to the distal end of the mobile support device than the rear catch, and a lever having a front end and a rear end, the front end being releasably latchable to the front catch, the rear end being releasably latchable to the rear catch when the lever is pivoted about the front end of the latch. The strap is secured to the lever and the chassis.

A biomechanical motion device employs a plurality of actuator cylinders to generate forces representative of human gait loading. The biomechanical motion device includes a crosshead that is manipulated vertically by a set of two vertical pneumatic cylinders, and the crosshead is mounted to two vertical shafts on linear bearings that guide the crosshead in the vertical direction. The biomechanical motion device further includes a horizontal slide system that incorporates a linear carriage rail mounted flush to the bottom of the crosshead. The linear carriage rail guides a sliding carriage, and a custom bracket is mounted to the sliding carriage. Attached to the bracket is a pivot shaft, and the shaft serves as a simulated knee joint about which a lower leg assembly can be rotated. Horizontal motion colinear with the carriage rail of the simulated knee joint connection is generated using a set of two horizontal pneumatic cylinders. This horizontal motion causes the lower leg assembly to pivot about where a prosthetic foot contacts a bottom contact plate during gait to rotate about the pinned knee joint.

The utility model discloses a dual-purpose artificial limb for sports and life, which comprises a vertically arranged vertical elastic support plate, the bottom end of the vertical elastic support plate is fixedly connected with a C-shaped elastic plate, the other end of the C-shaped elastic plate is transversely and fixedly connected with an upper foot plate, and the vertical elastic support plate, the C-shaped elastic plate and the upper foot plate form an L-shaped artificial limb. The middle part of the lower surface of the upper foot plate is fixedly connected with a lower foot plate which extends backwards. According to the sports and living dual-purpose artificial limb, the vertical elastic supporting plate, the C-shaped elastic plate and the upper foot plate are arranged, and the vertical elastic supporting plate, the C-shaped elastic plate and the upper foot plate of the device are integrally formed and form an L-shaped artificial limb structure, so that the sports artificial limb not only facilitates an amputee to participate in various sports, but also can be used for daily life; a customer is helped to achieve the hobbies of instant sports, the trouble that the customer wears one leg and also wears one leg is avoided, convenience is achieved, meanwhile, unattractiveness is improved, and life confidence is improved.

Methods of fabricating a compliant prosthetic foot are provided. A method includes optimizing a set of determinants defining a shape of a compliant prosthetic foot. The shape comprises a keel curve, a heel curve, and a forefoot curve, each of the heel curve and the forefoot curve at least partially defined as an offset curve with respect to a representation of an arched ground-facing surface of the compliant prosthetic foot. The optimizing includes minimizing a lower leg trajectory error associated with the set of determinants relative to a target kinematic data set. The method further includes fabricating the compliant prosthetic foot in conformance with the optimized set of determinants.

This invention relates to a fabric performance testing device for sock production, belonging to the field of sock production technology. The device includes a testing chamber with a rotating cylinder rotatably mounted at the center of its inner side. A servo motor for driving the rotating cylinder is fixedly mounted on one side of the testing chamber. Several telescopic mechanisms are fixedly connected to the outer side of the rotating cylinder, and a prosthetic foot model is mounted at one end of each telescopic mechanism. Several pilling mechanisms that cooperate with the prosthetic foot models are mounted on the inner wall of the testing chamber. This invention, through the pilling mechanisms, can simulate the wear and tear on socks during footwear exercise. Furthermore, because the prosthetic foot model is made of silicone, it can more realistically simulate the wear and tear between a person's foot and socks, making the pilling and fuzzing test of the socks more realistic and simulating the wear and tear of socks during wear more accurately.

The invention discloses a two-degree-of-freedom dynamic compensation below-knee prosthesis and a multi-mode control system and method, and belongs to the technical field of artificial below-knee prostheses. The two-degree-of-freedom dynamic compensation below-knee prosthesis comprises a prosthesis foot plate, a pitching joint, an inward and outward turning joint and a receiving cavity; the pitching joint is connected with the limb foot plate through the pitching support and can drive the limb foot plate to complete pitching motion around the bottom support. The inward and outward turning joint is connected with the pitching joint through the upper support and can control the shank support to achieve inward and outward turning movement around the inward and outward turning shaft. An induction control system is arranged to monitor inertia signals when a wearer walks in real time and receive pressure changes in the cavity walking process, sensor data are analyzed, normal gait motion characteristics are combined, the motion intention of the wearer is recognized, and an artificial limb system control strategy is adjusted; the control strategy is fed back and adjusted in real time according to the gait recognition result so as to meet the requirements for damping change and ankle joint angle change of the artificial limb system in different movement modes.

A prosthetic ankle joint used with a prosthetic foot to allow for a non-linear spring to be used for energy absorption and return capacity. Specifically, the ankle joint comprises a main body that connects to the shank of a prosthetic foot using mounting bolts that further connects to a pyramid adaptor using guide pins and a non-linear spring. The use of a non-linear spring as an attachment member allows for movement of the attachment point in relation to the foot while retaining the added benefits of a conical spring and the nonlinear compression it has. The non-linear spring of the present invention is preferably a progressive rate spring and is preferably conical but may other shapes that increase stiffness with deflection. The spring rate is determined by the weight of the patient and their activity level. Complementary teeth are alternatively available to prevent rotation.

The application discloses a passive bionic ankle-foot prosthesis, which comprises a shank connecting rod, a shank connector, a shank fixing tube, a sole fixing connecting device, a shank sliding block, a damper, an elastic element, a prosthetic foot plate and an energy recovery device. The shank connecting rod is hinged with the sole fixing connecting device to form a prosthetic ankle joint. The damper and the elastic element are connected in parallel. When the ankle joint rotates, the damper provides damping for adjusting the bending and stretching speed of the ankle joint, and the elastic element provides support and pushing torque in the states of plantar flexion, dorsal flexion and pushing. The prosthetic foot plate is used for reducing the impact force during the contact between the prosthesis and the ground, the sole fixing connecting device is connected with the prosthetic foot plate, and the energy recovery device is used for converting part of the elastic deformation of the prosthetic foot plate and the elastic element into electric energy. The application can well imitate the biomechanical characteristics of the human ankle joint, has flexibility and natural feeling when walking, and improves the stability and efficiency of walking.

The utility model relates to the technical field of prosthetic foot soles, and particularly discloses a carbon fiber all-terrain energy storage prosthetic foot sole, downward pressure is shared by a V-shaped connecting piece and a carbon fiber energy storage plate, the carbon fiber energy storage plate is of an arch structure, the pressure can be uniformly shared in the moving process of a stress point, breakage caused by pressure concentration at one point is avoided, and the service life of the carbon fiber all-terrain energy storage prosthetic foot sole is prolonged. When pressure is applied to the carbon fiber energy storage plate, the carbon fiber energy storage plate can deform to a certain degree, energy can be stored while the damping effect is achieved, energy stored by the carbon fiber energy storage plate is released when the foot is lifted, the carbon fiber panel is bent when the forefoot exerts force, energy can be stored when the carbon fiber panel is bent, and the elastic force of the carbon fiber panel is released when the user advances. The foot-lifting assisting device can assist in force application to push the artificial limb to move forwards, pressure generated when the artificial limb falls to the ground is stored through the carbon fiber panel and the carbon fiber energy storage plate, the stored energy is released when the foot is lifted, foot lifting assistance is completed, and the effects of foot-falling damping, energy storage, foot-lifting assisting force application and convenient walking are achieved.

A powered ankle / foot prosthetic with a closed-loop, neural, bi-directional intuitive control system can be utilized for transtibial amputees with traditional socket prosthetics or for those with osseintegrated prosthetics. Control (efferent) signals from the user to the prosthesis actuator are captured from EMG of residual gastrocnemius and tibialis anterior muscles. Sensory feedback (afferent) information about contact of the prosthetic foot with the ground obtained from a pressure sensor located on the foot bottom is reported to the user's nervous system by electrical stimulation of the residual trans-tibial and sural nerves. Surgically implanted or skin surface electrodes placed on / within the residual ankle flexor and extensor muscles relay recorded EMG to the control electronics mounted on the linear actuator. The control electronics are designed to generate a more natural powered plantarflexion of the ankle joint based on the EMG data, pressure sensor, and other inertial sensors.

A water-tight foot cover assembly is described. In one example, the water-tight foot cover includes a foot cover, and a seal. The foot cover can have a pattern on a bottom surface to increase friction between the water-tight foot cover and a walking surface. The seal can include one or more one-way valves and provide a water-tight seal so that water, dirt, or other debris cannot enter an inner cavity of the foot cover. The water-tight foot cover assembly can include an inner shell that provides structural support to the foot cover. The foot cover can be pressurized or vacuumized in order to change structural properties of the foot cover.

The utility model relates to the technical field of artificial limb sockets, in particular to an ergonomic socket device, which is characterized in that a binding belt is sleeved above a residual limb, the binding belt and the residual limb are fixed through adhesion among a plurality of magic tapes, a carbon fiber shell is sleeved on the outer side, and a lacing rope is tied on a proper air hole. The tail end of the residual limb is placed in the nylon sleeve, the using stability of the carbon fiber shell can be improved, the multiple air holes formed in the carbon fiber shell can enable air to enter the carbon fiber shell, the air permeability of the skin is guaranteed, the weight of the carbon fiber shell can be greatly reduced through the air holes, and the service life of the carbon fiber shell is prolonged. The effect of wearing and using for a long time is achieved through a force bearing point formed by the nylon sleeve and the stump, the ball joint can enable the threaded sleeve to rotate, bend and the like, when the carbon fiber shell is lifted up, the threaded sleeve resets under the action of the elastic force of the rubber sleeve, and the effect of improving the flexibility of the prosthetic foot plate is achieved.

The invention relates to a prosthetic foot insert (10), comprising a proximal fastening device (20) for fastening the prosthetic foot insert (10) to a proximal part (2), a holding part (30) which is arranged distally with respect to the fastening device (20) and is coupled to the fastening device (20), an elastic heel element (50) which is arranged on the holding part (30), and a main spring (40), the main spring (40) extends into the forefoot region and is coupled to a retaining part (30), the main spring (40) is supported on a heel element (50) between a proximal heel part (51) and a distal heel part (52), the retaining part (30) has a projection (34) which projects beyond the fixing element in the direction of the forefoot region and which is supported on the main spring, and the retaining part (30) is configured so that the main spring (40) is supported by the retaining part (30) in the direction of the forefoot region. And the main spring interacts with the distal heel part (52) when the forefoot is loaded.

The invention relates to a prosthetic foot insert (10) having a. A proximal fastening device (20) for fastening the prosthetic foot insert (10) to a proximal part (2) or a patient, b. A holder (30) which is arranged distally with respect to the fastening device (20) and which is connected to the fastening device (20), and c. A main spring (40) which extends into a forefoot region (11) and is coupled to the holder (30), the retaining part (30) is mounted on the main spring (40) in a pivotable manner in a sagittal plane, a rear limiting element (92) is arranged between the main spring (40) and the retaining part (30), said rear limiting element limiting a displacement of the retaining part (30) away from the main spring (40), and the fastening device (20) is mounted on the retaining part (30) in an articulated and longitudinally displaceable manner.

The present invention relates to a prosthetic foot insert (10) having a proximal fixation device (20) for securing the proximal foot insert (10) to a proximal component (2), a retainer (30) disposed distally relative to and coupled to the fixation device (20), an elastic heel element (50), and a main spring (40) disposed on the retainer (30), the main spring extending into the forefoot region and coupled to the retainer (30), wherein the main spring (40) is supported on the heel element (50) between the proximal heel component (51) and the distal heel component (52).

The utility model discloses a multi-axis structure left-right toe-separation heel height adjustable prosthetic foot sole, which comprises a full-length foot sole plate, the upper surface of the full-length foot sole plate is fixedly connected with a middle plate, the upper surface of the middle plate is fixedly connected with an upper plate, the rear end of the middle plate is rotatably connected with a connecting cylinder, the inner part of the connecting cylinder is in threaded connection with a threaded rod, and the threaded rod is in threaded connection with the middle plate. The top end of the surface of the threaded rod is fixedly connected with a twisting handle, and the top end of the threaded rod is rotationally connected with a connecting block. According to the multi-shaft structure left-right toe separation heel height adjustable artificial limb foot plate, in the using process, a worker twists a twisting handle, a threaded rod can be driven to ascend and descend, then the height of a foot root can be adjusted, the equivalent height of a heel can be adjusted conveniently after a shoe is replaced, the situation that an artificial limb leans forwards and backwards is avoided, and then the wearing comfort is improved; and the safety in the movement process is improved.

The invention discloses a deep neural network-based artificial limb foot plate constant stiffness reverse design method. The method comprises the following steps of: 1, parameterized script modeling; step 2, simulation output; step 3, constructing a data set; 4, constructing a deep neural network; 5, training a prediction model; step 6, testing and evaluating the model; 7, reversely outputting a design scheme; wherein in the step 3, a data set is established according to a simulation result; wherein in the step 4, a deep neural network is constructed by using a data set; wherein in the step 6, the network model is tested and evaluated; according to the systematic design method, the design efficiency can be remarkably improved, reverse structural parameter prediction is carried out on the prediction model through the deep neural network, meso-scale refined design can be carried out, the method is more reliable and accurate, network parameters can be optimized in real time in the design process for different design objects, and the design efficiency is improved. And the network model performance and design accuracy are improved.

A prosthetic foot includes a spring component and a sole component. The spring component comprises two or more stacked beam elements, each beam element including, along the length of the respective beam element, a first portion and a second portion, and the second portion of the beam element includes an extent with a length-varying width. The respective beam elements are fixed to each other and to the sole component proximate the heel portion of the sole component or the toe portion of the sole component at the first portions of the respective beam elements to form a fixed end of a cantilevered composite beam. The second portions of the respective beam elements are laterally movable with respect to each other when the spring component deflects.

The application provides a novel intelligent bionic hydraulic carbon fiber artificial foot, and relates to the field of artificial feet, which comprises a foot plate, a connecting seat, an ankle joint shell, a strain gauge and an electro-hydraulic damping cylinder. The electro-hydraulic damping cylinder comprises a cylinder body and a throttle valve assembly, and the throttle valve assembly comprises a telescopic rod, a throttle valve and a support rod which are connected with each other from top to bottom. The throttle valve comprises a valve body, a throttle valve sleeve is fixed to the bottom of the valve body along the axial direction of the cylinder body, a through hole is formed in the throttle valve sleeve along the axial direction of the cylinder body, a throttle valve core which can move up and down is inserted into the through hole, and a throttle port is formed in the side wall of the throttle valve sleeve. The coil magnet drives the throttle valve core to move in the through hole according to the electromagnetic force generated by the coil magnet, so as to change the size of the area of the throttle valve core blocking the throttle port. A displacement sensor is arranged on the valve body and is used for sensing the displacement of the throttle valve core relative to the valve body along the up and down movement of the through hole. A control device is arranged on the outer wall of the cylinder body and comprises an inertia sensor and a microprocessor. According to the artificial foot provided by the application, the structure is simple, and the corresponding optimal damping can be actively adjusted.

The utility model relates to the technical field of artificial limb ankle joints, and discloses an adjustable artificial limb ankle joint which comprises a main body support and an artificial limb foot plate, and further comprises a shaft rod structure and a connecting rod structure, the first hole site is formed in the main body bracket; the two second hole sites are both formed in the prosthetic foot plate, and the shaft rod structure penetrates through the first hole site and the two second hole sites; and the lubricating structure is arranged on the main body bracket. When the adjustable artificial limb ankle joint lubricating device is used, a user can lubricate the adjustable artificial limb ankle joint only by rotating the threaded rod, complex operation or additional tools are not needed, and therefore the adjustable artificial limb ankle joint lubricating device is very convenient to use, and convenience is provided for use of the artificial limb ankle joint.

A mounting bracket for a prosthetic foot configured to attach to a residual limb, comprising an upper member, a lower member and compression torsion joint. The upper member comprises an upper flange, a mating post, and mounting portion configured to attach to the residual limb. The lower member comprises a mating portion, a lower flange, and a mounting portion configured to attach to the prosthetic foot. The compression torsion joint couples the upper member to the lower member and is configured to limit the vertical movement and torsional movement of the upper member with respect to the lower member.