Spanners TRIZ Cases

See how asymmetric curved toothing and fork-shaped arms enable stable multi-directional engagem

See how asymmetric angled teeth and a flexible engagement profile enable secure tool-to-foot en

See how a clamp assembly with vertical stop ridges and push-member protrusions secures wrenches

See how a socket-engaged tool with reciprocal engagement devices removes tankless water heater

See how a fork-shaped tool with diverging arms and arched tooth engagement enables stable, high

See how a broken-profile fork key engages an 8-12 sided polygonal base to reduce maneuvering an

See how a pivotable security member with an L-shaped restriction component prevents hand tool t

Motor-state feedback detects bit-screw disengagement and stops rotation at the right moment to keep screw depth consistent and prevent head embedding.

Motor-state feedback detects bit-screw disengagement and stops rotation when the screw head reaches flush depth for stable fastening.

Combining motor current and rotation speed lets the control unit detect screw seating before impact and stop or slow the motor.

A hex-drive adapter links a lug nut cover wrench to a power tool for faster, scratch-free removal and attachment during wheel maintenance.

A contact-based feedback control scheme stops bit travel at the right depth, helping screws seat flush while maintaining fast insertion.

Movable pins, cams, and a trigger simplify damper component engagement and release while maintaining secure torque transfer.

A depth sensor near the output drive lets the controller adjust or pulse the motor at a threshold distance for consistent fastening depth.

A rigid safety pin links the head and body so a turnbuckle lashing tool stays intact under high stress and reduces injury risk.

A rigid safety pin and bore gap let the lashing head absorb failure loads, preventing complete breakage and reducing injury risk.

A detachable, torque-limited clamp tightener improves hidden roof-bar coupling, saves accessory space, and avoids damage during transport.

Motor-rotation feedback controls driver bit travel and stop timing to achieve flush screw heads with stable tightening speed.

A controller detects a tightened fastener from output-shaft load and switches reverse speed to raise torque for loosening rusted or deformed joints.

Motor load feedback stops forward bit travel when no screw is present, preventing empty fastening collisions and wasted motion.

A divided barrel integrates the motor and gear assembly in separate cavities, shrinking tool size while easing assembly and machining.

A double-ended socket body and coupler let utility workers drive different fastener sizes with one compact tool, cutting carry weight and tool loss.

A resin gear housing and retained bearing make the impact tool more compact, lighter to handle, and better protected from shock.

A multi-drive socket combines cross and triangular driving elements to handle varied utility fasteners while cutting tool count and carry weight.

A handle-mounted torque sensor and perpendicular torque post avoid wire breakage, contact failure, and vibration-driven torque errors.

A resin housing, nested bearing layout, and protective cover make the impact power tool more compact while preserving strength and internal protection.

Periodic motor shutdown after preset impacts lowers impact frequency in low-speed screwdriving to prevent surface damage while maintaining flushness.

A detachable tightening member uses guiding surfaces, elastic locking, and ratcheting to save space and ease clamping in tight spaces.

Periodic motor shutdown after preset impacts keeps thin-screw tightening at low speed, limiting surface damage from excess torque and impact.

A hollow-portion torque sensor with fixed rear plate improves screwing torque detection by isolating motor vibration and receiving torsion accurately.

Synchronizing bit feed with screw rotation prevents tool floatation from reaction force and enables complete screw tightening.

A stationary strain gauge section coupled to the pivot bearing detects multi-directional forces for earlier kickback and tool wear recognition.

Load-based reverse-speed switching boosts torque after impact to loosen rusted or deformed fasteners more efficiently.

An angled shaft tool with universal joints reaches hidden battery module nuts, blocking casual access while enabling authorized maintenance.

Flexible tactile members and a rotary shaft let users replace partially obstructed upward-facing bulbs from the ground, avoiding ladders.

A shear-limited bit lets standard tools apply repeatable set screw torque, securing conductor cables without dedicated torque tools.

A rotatable drain assembly in a ratchet wrench shortens axial reach and adjusts discharge angle for smoother brake oil draining in tight spaces.

Current-based stop control lets an electric tool adapt to metal, wood, and drill modes to prevent fastener slip and improve fastening efficiency.

Moveable pins and a trigger replace threaded damper engagement, enabling faster torque transfer and smoother disengagement in suspension assemblies.

Electromagnets shift the ratchet latch for one-handed direction switching while keeping the commutating mechanism enclosed against debris.

A USB interface automates torque wrench setup, charging, and measurement logging to cut manual resets and recording errors.

A decoder circuit powers the controller only when trigger or contact inputs are engaged, cutting idle battery leakage in cordless nailers.

A drill-driven rod and connecting tip replace bulky hand cranks to lower or raise underbody spare tires with far less strain.

Flux-conducting rings redirect magnetic force to the bit tip, improving screw hold in deep holes without increasing rod diameter or blocking sight.

A rigidly linked cutting part uses setting head motion to cut material tape without extra actuators, reducing cycle time and maintenance issues.

Torque sensing and drive-direction correction align bolts with fastening holes, reducing twisting and deformation in aluminum or plastic parts.

A motor and transmission mechanism feed screws with enough pressing force while avoiding bulky solenoids and preserving compact tool balance.

Wide 45-90° blade angles improve conduit deburring, while a lanyard receiver near the center of gravity helps prevent bit dislocation.

A tube-and-ejector plug tool speeds deck board plug placement while improving color match and reducing water and debris traps.

Gravity-fed bolt separation and clamping raise fastening speed across varied bolt sizes while avoiding powered feed mechanisms.

Integrated lighting improves visibility at the workpiece, while a vibration-damping insert protects electronics and reduces noise in angled tool holders.

An asymmetrical detent pin notch reduces stress concentration while keeping impact tool sockets securely retained under repeated high-torque impacts.

Dual wireless and wired data transfer lets fastening tools send real-time torque data without suspending operation and offload stored records faster.

Magnetic holding suspends and centers ferromagnetic load distribution discs, simplifying roof membrane fastening and reducing jamming.

A flexible push element mechanically feeds rivets through an enclosed hose against gravity, cutting pneumatic energy use and jamming risk.

Magnetic washer holding replaces mechanical retainers in roof membrane fastening, improving alignment, release timing, and jamming resistance.

A geared multi-output tool applies independent torque to blind-mating fasteners, preventing rocking motion, mis-mating, and breakage.

Radially elastic conical centering aligns blind rivet nuts coaxially with the setting hole, cutting wear and cycle time in automated tools.

A single manual switch loads a selected bit from a rotating magazine and then starts the motor, simplifying one-handed screwdriver operation.

A rotary control and electronic clutch enable one-handed mode selection and automatic torque cutoff when a fastener reaches its target position.

A motor-driven reciprocating clamp loosens threaded pipe joints while protecting interior threading and reducing the need for multiple tools.

A segmented arm with a coupling mechanism and retraction cord places safety straps around varying tree diameters more safely and predictably.

Independent motors for bit rotation and axial motion replace springs and gas cylinders to deliver precise, adjustable screw striking force.

Extendable moment arms add mechanical advantage to a ball-and-socket mount, making surgical instrumentation easier to position and secure.

A movable arm and coupling mechanism place safety straps predictably around trees and poles despite changing diameter, height, and weather.

A dual-motor roller-screw tool streamlines blind fastener setting with compact, controlled crimping and fewer production steps.

A pressing-force threshold keeps the output shaft from rotating until intentional load is applied, reducing unintended start-up and preserving manual control.

A rotatable vacuum nozzle and pneumatic driver handle small screws and counter bore holes while enabling automatic screwing from 0 to 180°.

Flexible axial bearing support absorbs slanted-gear forces in a compact torque wrench attachment, improving torque accuracy and fatigue resistance.

A modular tool changer separates the pick tool from the driver, enabling quick fastener-specific changeover with a common drive bit.

Spring-biased clamps and a geared adapter let one torque wrench lock onto different fastener sizes without changing sockets.

Electrical bit stroke control replaces bulky mechanical depth adjustment, improving fastening precision, stability, and tool handling.

A spring-loaded lever and lifting magnet decouple the torque path at target torque, preventing over-tightening of sensitive screw joints.

Two torque transducers placed before and after the angle gear improve tightening accuracy by tracking gear ripple, friction, and tool wear.

A worm gear and ring gear winding tool cuts manual torque and slipping risk when installing or removing high-energy torsion springs.

Dual electric motors let a subsea torque tool switch or combine torque outputs, avoiding surface gearbox changes and limiting overload risk.

A sliding actuator and spring-biased jaws let one insulated tool grip live screws and nuts of different widths safely.

Serially connected pivot modules and Y- or H-shaped links extend wrench reach and add versatile driving points without a fixed pivot layout.

A bevel-gear transmission converts input torque across axes to drive fasteners on long threaded rods with better access and lower wear.

A wedge member expands contact in a damaged bone screw groove, improving removal force while avoiding further screw head damage.

Deep and shallow polygonal holes let one wrench rotate a main nut and jam nut with less tool switching and better access in confined spaces.

Wireless torque matching lets one tester identify and verify multiple electronic torque wrenches without cables or manual selection.

A rotatable intermediate gearbox shifts bolting reaction forces to a torque support foot, reducing operator effort for higher torque use.