12 results about "Prosthetic knee" patented technology

A combination of a first assembly for guiding resection of a femur and tibia of a knee joint and a second assembly including femoral and tibial knee components. The combination of the first assembly and the second assembly provides optimal placement and positioning of the femoral and tibial knee components to achieve near-normal knee kinematics and tension. The preparation for and placement of the prosthetic knee components provides medial-pivoting kinematics mimicking that of the natural knee thereby promoting improved outcome for the patient.

The application discloses a single-shaft active and passive mixed driving intelligent artificial knee joint structure with energy recovery function, which comprises a joint rotating module, a gear transmission module, a hydraulic damping module, a rack and a motor. The gear transmission module comprises a primary bevel gear transmission system, a secondary gear transmission system, a synchronous belt wheel transmission assembly and a transmission rack. The motor is fixed on the transmission rack. In the active stage, the motor provides an active driving torque for the knee joint through the gear transmission module and the joint rotating module. In the passive stage, the joint rotating module transmits a passive torque of the knee joint to the motor through the gear transmission module, drives the motor to rotate, so that the motor generates electricity to recover energy, and the hydraulic damping module provides a damping torque to ensure the stability of the knee joint. In various use occasions, the required damping or driving torque can be obtained, the power consumption of the motor can be reduced by recovering the passive torque of the knee joint in the passive stage, and the working endurance of the intelligent artificial limb is improved.

The utility model belongs to the technical field of safety prostheses, and particularly relates to a double-hydraulic elastic buckling safety prosthetic knee joint which comprises a supporting body, a joint connector and a hydraulic sleeve, the joint connector is arranged at the lower end of the supporting body, and the hydraulic sleeve is arranged at the side end of the supporting body. Through the arrangement of the bent connecting frame, the supporting shaft, the pressure stabilizing connecting mechanism, the spring and the displacement telescopic column, the bent connecting frame and the knee joint protection shell at the front end rotate through the supporting of the supporting shaft and move under the driving of the hydraulic sleeve; the bending connecting frame pulls the pressure stabilizing connecting mechanism through the positioning column, the displacement telescopic column is promoted to move in the pressure stabilizing connecting mechanism, meanwhile, the spring connected to the side end of the pressure stabilizing connecting mechanism is stretched, and when the knee joint bends, the pressure stabilizing connecting mechanism connected with the bending connecting frame gets close to the other side, so that the knee joint is bent. And the displacement telescopic column slides in the pressure stabilizing connecting mechanism, and meanwhile, the spring rebounds and resets.

1. Name of the product in this design: Intelligent Knee Joint. 2. Purpose of this design: For use in prosthetic knee replacement. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application belongs to the technical field of damper, especially relates to an energy storage assembly, an adjustable damper and application of the damper on a prosthetic knee joint. The structure of the energy storage assembly comprises an external cylinder unit for connecting a regulating valve and a one-way valve through a connecting damper rear end cover, a piston plate unit inserted into the external cylinder unit and used for separating an oil storage cavity and an energy storage cavity, a spring unit with a base arranged on the inner side of the external cylinder unit and used for elastically supporting the piston plate unit, and a sealing connection dual-purpose plate unit. When the sealing connection dual-purpose plate unit is arranged on the spring unit with a base, the sealing connection dual-purpose plate unit is used for forming an inflatable energy storage cavity between the spring unit with a base and the piston plate unit. When the sealing connection dual-purpose plate unit is arranged on the side of the energy storage cavity of the piston plate unit, the sealing connection dual-purpose plate unit is connected with a power cylinder and used for forming a driven energy storage cavity.

The invention belongs to the technical field of prosthetic knee joints, and particularly relates to a five-connecting-rod self-adaptive multi-mode prosthetic knee joint based on a magnetorheological effect, which comprises a motor, an output shaft of the motor is connected with an input shaft of a double-output speed reducer, and an output shaft of the double-output speed reducer is connected with a five-connecting-rod mechanism. According to the double-output speed reducer, the self-locking connecting rod is locked and released through the self-holding electromagnet, and the self-locking characteristic of the worm gear and the worm is combined, so that dynamic reconfiguration of the five-connecting-rod mechanism is achieved; the five-connecting-rod mechanism is switched between a four-connecting-rod mechanism and an equivalent single-shaft mechanism, so that the three working states of an active mode, a semi-active mode and a mixed mode are achieved, walking requirements in different environments are met, powerful functions are guaranteed, meanwhile, high reliability and low cost are achieved, and the optimal balance of performance and energy consumption is achieved.

Various implementations include a prosthetic knee device. The prosthetic knee device includes a thigh portion. The prosthetic knee device includes an upper shank portion. The thigh portion is rotatable relative to the upper shank portion. The prosthetic knee device includes a lower shank portion translationally movable relative to the upper shank portion. Rotation of the thigh portion relative to the upper shank portion causes translational movement of the lower shank portion relative to the upper shank portion.

An arrangement for minimizing the amount of bone initially required to be resected off surfaces of a knee joint prepared using a plurality of user-operable adjustable extension tabs that define a stability gap derived from gap measurements taken in each of extension, mid-flexion and flexion, wherein the stability gap is commensurate with a reference plane derivable from the arrangement wherein a final bone resection with a corresponding bone surface with the reference plane provides for optimum balanced angular movement between the tibia component and the femoral component of the prosthetic knee joint post-surgery.

The invention relates to a tibial tray (20) having a distal surface (D), in which a tibial tray shaft structure (21) extends away from the distal surface (D) in a distal direction (DD), in which the tibial tray structure (21) comprises at least three shaft wall elements (22, 23, 24, 25), the at least three shaft wall elements (22, 23, 24, 25) are arranged relative to each other in such a way that a cross-section of the at least three shaft wall elements (22, 23, 24, 25) in a plane perpendicular to the distal direction (DD) is at least a T-shaped, Y-shaped or X-shaped cross-section, and an area (F) of the cross-section decreases strictly monotonically from the distal surface (D) in the distal direction. The invention further relates to an artificial knee joint.

The present application relates to a kind of prosthetic knee joint anti-collapse device of prosthetic shield, base is respectively arranged in the two sides of prosthetic knee joint, two sliding grooves are set in each base, and the branch of sliding connection is in each sliding groove, and the bottom end of two branches is connected with connecting rod;Folding soft shell's front and rear ends are respectively connected with the top end of four branches;Switching slider is connected with connecting rod, and pushing switching slider can be dragged branch along sliding groove by connecting rod, and the folding soft shell is folded or unfolded;The upper portion of connecting seat is connected with two bases, and its lower portion is connected with prosthetic lower leg.The device is designed folding structure in the recessed position of knee joint between prosthetic shield and receiving cavity, realizes the unfolding and folding of folding soft shell, completes the rapid filling to the recess, avoids the collapse problem at knee joint after lower limb prosthetic wearer sits down, and improves the aesthetic property of lower limb prosthetic wear.

A prosthetic knee replacement apparatus constructed of rubber avoids the disadvantages of metal prosthetics. The knee replacement apparatus includes a base member as a spacer between the upper and lower legs of a patient. A femoral portion extends upwardly from an upper surface of the base member and a tibial portion is coupled to a lower surface of the base member. The knee replacement apparatus may be constructed completely or substantially from a rubber material so as to reduce friction and degeneration. The knee replacement system may be constructed or even 3D printed after the leg bones of the patient are scanned.

The invention discloses a self-adaptive cooperative control method and system for a knee joint of an artificial limb and the artificial limb, and belongs to the field of intelligent rehabilitation equipment control. The method comprises the steps that plantar pressure distribution signals are collected, and preferably knee joint angle signals are also collected; identifying a fine gait sub-phase and a user high-level motion intention based on the signal; according to an identification result, performing joint query in a pre-stored multi-dimensional optimization mapping table to obtain matched driving control quantity and damping control quantity; and in the same control period, the two are synchronously output to the driving unit and the damping unit to cooperatively control the knee joint movement. The corresponding system comprises an information perception fusion module, an intelligent identification decision module and a synchronous driving execution module. Through collaborative decision and synchronous control of driving and damping, dynamic adaptive optimization of motion characteristics of the knee joint of the artificial limb is realized, and gait naturalness and environmental adaptability are improved.