Artificial Legs TRIZ Cases

A prosthetic running blade features a manually shiftable heel attachment that transitions between stowed and deployed positions.

A prosthetic foot uses a passive release device to switch between locked and released positions based on ankle torque.

An eccentric fastening device with a proximal strut reduces hip-to-knee distance, resolving uneven gait and thigh extension issues.

A powered prosthesis controller modulates knee flexion trajectory using thigh angle feedback to enable volitional foot clearance.

Multi-axis impedance modulation in a powered prosthesis reduces metabolic energy consumption during turning by mimicking natural ankle function.

A vacuum pump uses a spring-loaded movable wall to expand and contract its fluid chamber, reducing air pressure fluctuations during gait.

A jointless prosthetic foot uses a convexly curved attachment path to maintain constant foot-strike position during leaf spring flexion.

An external elastomeric valve regulates socket pressure via a low crack threshold, eliminating plugging and noise during gait cycles.

An inverted polycentric linkage prosthetic joint enables deep flexion by routing the first linkage through the space between the pair of linkages.

Curved hydraulic passages in a unitary prosthesis housing reduce energy losses, extending battery life while simplifying assembly.

Adjusting joint impedance parameters via user signals modulates torque output in powered lower limb assistive devices.

Segmented prosthetic sockets with adjustable windows enable sensor integration, resolving the trade-off between bespoke fit and component repurposing.

An adjustable prosthetic socket with an articulated hinge accommodates swelling limbs, eliminating the need for multiple replacement devices.

Modular segmentation and porous materials resolve the trade-off between structural support and ease of donning for residual limbs that swell.

A microprocessor-controlled motor converts residual bone rotation into prosthetic limb movement using magnetic field detection.

A perforated locking liner uses a frusto-conical sealing cap to manage sweat and maintain reduced pressure suspension.

Microprocessor-adjusted braking torque resolves stair descent contradictions by synchronizing knee and ankle movements.

A polycentric knee joint uses a multi-stage air pressure valve to adjust airflow resistance automatically.

Series-elastic actuators store elastic energy during stance phase to reduce electrical power consumption while maintaining mechanical output.

Friction brake modulates spring force to replicate natural muscle torque, eliminating heavy motorized components in prosthetic limbs.

Inertial sensors determine absolute lower leg angle to modify prosthetic knee bending resistance, reducing device complexity while maintaining control accuracy.

Segmented prosthetic foot cover prevents fluid accumulation and restricts transverse movement through detachable components.

Dual suspension prosthetic socket integrates mechanical locking with vacuum valve assembly to secure residual limb attachment.

A prosthetic foot pump mechanism uses a flexible membrane to generate negative pressure inside the socket.

Segmented knitted structures detach sensors from the prosthesis to simplify cleaning and reduce adaptation time.

A fluid pressure vessel membrane distributes hydrostatic force to capture limb stump contours during standing plaster casting.

Permanent magnet system controls magnetic flux to attach artificial limb without electric power, reducing stump pressure.

Curved split blades in prosthetic feet enable independent multi-axial movement, resolving instability on uneven surfaces by mimicking natural foot mechanics.

A 3D printed prosthetic foot uses concentric continuous fiber layers to deliver dynamic elastic response for energy returning gait.

A prosthetic foot uses a friction element to apply torque that resists pivoting between the foot part and lower leg part.

Replacing solenoid valves with a voice coil mechanism reduces power consumption while improving fluid flow precision and response speed.

A prosthetic knee joint adjusts rotational resistance via thigh inclination angle detection to match walking phases.

Curvilinear leaf springs store and release energy to simulate natural foot movement in prosthetic devices.

Directional friction forces from a sliding link part slow prosthetic knee flexion, preventing abrupt unlocking and enhancing balance stability.

Segmenting the core and casing with interchangeable tongues resolves manufacturing complexity while adapting foot properties to individual user needs.

Depth camera generates three-dimensional point cloud to adapt prosthetic distal segment positioning, reducing mental load and reeducation time.

A vacuum-assisted prosthetic suspension pump uses a compression transfer element to expand and compress a fluid chamber volume.

Dovetail rail and latch mechanism couples prosthetic blade to interchangeable outsoles for rapid sole structure changes.

A voice coil valve modulates hydraulic fluid flow in a prosthetic knee actuator to enable rapid, bi-directional movement.

A hinged prosthesis apparatus switches flexion resistance between minimal and maximal values based on support detection.

Check valves enable passive to active transition in a hydraulic actuator, reducing valve complexity and preventing pump leaks.

Porous mesh structures dissipate heat via convection without increasing device complexity, preventing pressure sores on residual limbs.

A phase-dependent EMG pattern recognition strategy classifies user locomotion modes using Linear Discriminant Analysis on leg muscle signals.

Repulsive magnetic forces between implanted and attachment magnets prevent prosthesis separation and rotation without mechanical complexity.

Rotatable toe part stores elastic energy during ground contact to resolve unstable walking and hip lift issues in conventional prosthetics.

An elongate groove in a prosthetic foot member allows segmented articulation, accommodating heel height changes while maintaining natural rollover performance.

Variable stiffness in the prosthetic ankle increases push-off force while maintaining range of motion for natural gait.

A rotatable axle decouples transverse forces in orthopaedic joint dampers.

A one-piece carbon fiber composite component forms the spring structure of a foot prosthesis, enabling homogeneous deformation and torsional flexibility.

Sensor-driven manipulators adjust ankle stiffness during gait phases to resolve the trade-off between inversion range and lateral stability.