Artificial Legs TRIZ Cases

Biomechanical sensor data trains AI to predict preferred prosthesis ankle stiffness, cutting lengthy manual tuning for each user.

Asymmetrical clamping discs and jamming rollers hold gripping force after power loss while allowing free rotation and simpler manufacture.

Permanent magnets lock heel height settings in a prosthetic or orthotic joint actuator, preventing drift while allowing precise adjustment.

Opposing magnets lock or release a prosthetic actuator, enabling precise heel height adjustment without sacrificing joint stability.

Circumferential locking elements secure a prosthetic liner insert with easy release, reducing slack, noise, and incorrect locking.

Opposed magnets lock or release an actuator so prosthetic and orthotic joints can adjust heel height and length with stable positioning.

Uses jamming rollers and asymmetric disc recesses to lock against external force without continuous power while allowing free rotation in one direction.

A compliant Hall sensor array detects prosthetic ground contact while separating axial load from torque and inertial spikes for stance control.

A load-directing cam path shifts weight-bearing forces into the frame, cutting actuator size and power while improving ankle stability on varied terrain.

A guided pin, lock assembly, and lanyard-vacuum suspension reduce pistoning and make prosthetic donning easier for low-dexterity users.

A pivoting cover element follows prosthesis joint motion to shield exposed gaps, block clothing entanglement, and simplify fitting and removal.

A flexible bond reinforced by a spring connector preserves prosthetic foot flexibility while extending fatigue life and preventing detachment.

A friction-based unidirectional lock stores and releases elastic energy in prostheses with lower power use, less weight, and smoother comfort.

EMG, GRF, and IMU signals drive continuous knee torque control, helping transfemoral amputees climb stairs with a more natural gait.

A split heel element and forefoot main spring improve heel-strike damping, roll-over stability, and material use in prosthetic foot inserts.

A cam-guided pin, connector, and lanyard combine vacuum and mechanical suspension to prevent mislocking, reduce pistoning, and ease donning.

A segmented heel element and forefoot main spring improve impact damping, bending behavior, and rollover stability in prosthetic foot inserts.

Composite rivets secure prosthetic foot spring layers while limiting forefoot stiffness, improving stability, durability, and natural gait.

A bone-anchored magnetic implant suspends the prosthetic socket without soft tissue compression, reducing irritation, pistoning, and infection risk.

Adjustable stiffness and flexible members help a prosthetic foot stay stable in stance while absorbing and returning elastic energy.

Real-time finite-state control coordinates powered knee and ankle joints to reproduce healthy running gait and a double float phase.

Continuous fibers bridge the shank-foot gap to prevent joint degradation while preserving independent flex and user-specific tuning.

Locking joints and a heat-moldable inner socket let users adjust prosthesis fit as body shape changes, reducing clinic visits and cost.

A spaced spring and heel cushion layout improves energy return, heel-strike damping, and rollover in low-profile prosthetic feet.

A motor-controlled pneumatic-hydraulic module adjusts prosthesis stiffness and energy release timing across gait phases for smoother walking.

Resistance is adjusted from ankle and lower-leg angles plus step height change, improving downhill detection and stable transtibial gait.

A resilient foot shell cover uses a stirrup and elastic rim to seal the shell and pylon, blocking water and debris without added fasteners.

Speed-based resistance timing shifts peak ankle resistance earlier in stance to improve energy storage, release, and gait naturalness.

A handle-driven moment arm lets a prosthetic socket switch between open and closed fit states while adapting to residual limb volume changes.

A pre-tensioned pivoting-piston seal raises contact pressure in one direction and lowers friction in the other to cut gap losses in orthopedic joints.

A swappable polymer funnel adapts prosthetic socket fit to residual limb shape and volume changes, reducing discomfort without complex tightening.

A unified volitional controller switches by ground contact to adjust knee torque and position for stable walking, stairs, and uneven terrain.

Zoned recess and protrusion patterns improve drainage and traction in athletic prosthetic soles while limiting abrasion on varied running surfaces.

A four-bar ankle prosthesis uses a low-friction screw-nut brake to absorb stance torque and improve swing-phase toe clearance with less motor power.

A two-part heel element and nested forefoot spring improve impact damping, bending behavior, and space use in a prosthetic foot insert.

Finite-element-designed adjustable struts tune load transfer and energy return to match patient biomechanics and reduce fatigue.

Prefabricated mechatronic modules anchor into the socket wall to simplify prosthesis manufacturing while enabling adaptive fit adjustment.

A mechanical locking and pendulum linkage prevents involuntary knee mode switching during stair descent while preserving flexion ease.

A spring-gear knee and ankle mechanism stores and releases gait energy to cut metabolic effort and improve walking, sitting-standing, and stair climbing.

A diverter valve switches hydraulic flow paths to lower swing-phase resistance, lift the foot, and prevent toe drag during gait.

Flexible removable blades and variable stiffness control help a prosthetic foot improve gait stability, energy return, and user-specific adaptation.

A locking connecting rod and hydraulic oil-flow control keep prosthetic knee resistance active through the full bend, reducing stumbles on stairs.

Textured sole recesses, protrusions, and sipes improve wet-surface grip while reducing early toe-side abrasion in athletic prosthetic feet.

A parallel throttle and 3-way valve layout maintains damping and absorbs fluid volume changes with fewer valves and lower joint complexity.

Gait-driven pumping draws air from the socket to maintain sleeve-free vacuum suspension, reducing leakage, bulk, and motion limits.

Six-axis positioning and integrated heating enable precise prosthetic alignment, thermoforming, and documented fit measurements.

A reinforced flexible bond and spring connector improve prosthetic foot fatigue life while preserving spring stiffness and joint movement.

Axial displacement in the lower prosthetic component is converted into knee flexion, helping mimic natural gait and reduce hip effort.

Handle-driven shell components open for donning and lock for secure fit, adapting to residual limb volume changes with less user force.

EMG, ground-force, and IMU signals are combined to adjust powered knee torque continuously for more natural stair climbing with less fatigue.

Zoned flexibility in an exoskeletal prosthesis mimics natural limb hardness, resolving the contradiction between structural integrity and realistic comfort.