Spanners TRIZ Cases

Nested multi-component rings rotate frozen fasteners through a gear assembly, reducing operator strain in obstructed spaces.

Nested sockets in a sliding handle eliminate the need for separate tools while magnets retain fasteners during operation.

An electric ratchet wrench uses a clutch that disengages under high resistance, allowing manual override to overcome rusted bolts without losing motor drive.

Internal cutting channels grip stripped fasteners to apply torque, preventing over-travel and lodging during extraction.

Cylindrical pivots replace plate-shaped insertions in the mounting slots, securing pawl orientation and preventing instability during operation.

Hat-shaped drive adapter couples motor tools to interchangeable bushings, reducing manual spanner time and protecting measuring pins.

Alternating drive unit torque pulses reverse rotation to release clamped screwing means, preventing elastic deformation damage.

Adjustable magnetic arm in the wrench shaft positions the magnet to retain short bolts in deep sockets, resolving inadequate retention.

Constant bias applied to the cage member reduces the ratcheting angle, enabling reversible tools in confined spaces.

A backup tool uses a release nut to secure the device without adjustment screws.

A socket uses a rotating sleeve and internal magnet to hold fasteners securely.

A ratchet tool uses a linearly movable switching member to pivotally rotate a pawl member for rapid direction changes.

A modified basin wrench uses a pivoting head assembly to grip and rotate faucet shank nuts in confined sink spaces.

A portable power tool system uses RF signal strength to verify proximity to a fixed controller.

Curved positioning surfaces engage a catch to lock wrench segments, maintaining driving force when traditional teeth are damaged.

An auxiliary jaw slides elastically within a wrench head to grip workpieces.

A single-handle wrench uses a spring-loaded moveable jaw to grip workpieces securely.

A rotatable collar with a spring-loaded stop member enables bayonet-style coupling of power tool attachments.

A powered loosening tool with eccentric torque transmission and a flexible drive shaft.

Segmentation separates the light source from the knife module, resolving the trade-off between simultaneous illumination and safe knife operation.

A screw magazine attachment uses a feed pawl part pivoting on a transverse axis to advance fasteners.

A fastener guide uses a spring-loaded barrel to align tool bits with small fasteners, reducing manual alignment time and labor costs.

Replacing linear triggers with rotary input sensing resolves wrist strain and improves speed adjustment precision through angular displacement detection.

A telescopic socket uses a sliding inner sleeve within an outer sleeve to provide variable length options for fastening tasks.

A drive bit with a longitudinal slot accommodates various eyebolts and cup hooks for power tool installation.

Radial metal elastic pieces prevent fatigue breakage in plastic buckle rods, ensuring long-term reliability and easy replacement of the screwdriver bit seat.

Nested inner and outer mouths prevent gear disengagement while providing structural strength, resolving the trade-off between device complexity and versatility.

A two-phase impact wrench method estimates transmitted torque to control rotary impacts on expansion anchor screw heads.

A torque wrench uses a dual-range adjustment mechanism to set values quickly.

Dual annular drive gears transmit torque through simultaneous multi-tooth engagement, preventing wear and extending tool lifespan.

Elastic damping elements between motor and handle housings reduce vibration transmission, preventing component loosening and operator discomfort.

A torque wrench uses side and main display window lighting modules to provide immediate visual feedback on applied force levels.

Lock pins engage splines to prevent unintentional loosening during torque application.

A slide hammer impact wrench translates linear motion into rotational torque for fastener engagement.

A torque wrench retaining unit fixed at the tubular body end opening enables push rod sliding and elastic unit bearing.

Elastic holding claws in a tubular socket mechanically retain bolted assembly elements through spontaneous locking and unlocking actions.

Tapered neck geometry distributes force across damaged fastener corners, preventing further rounding and ensuring smooth rotation.

A torque socket integrates a release mechanism with elastic members to stop output at a set threshold.

A pivoting bit holder uses a multi-depth socket to articulate an interchangeable bit relative to the shaft axis.

A lag driver receives and rotates hook fasteners into a locked position for torque application.

Contoured tapered channels on alternating hex surfaces create digging edges that maintain grip on damaged fasteners.

Asymmetric placement of the actuating member reduces wall thickness and weight while maintaining engagement stability.

A torque driver moves a marker forward using repulsive magnetic forces to contact screw heads.

A universal tub drain wrench uses cam followers and an elastomeric ring to grip and remove old plumbing fixtures.

A multi-bit tool employs a substantially rigid main frame with longitudinal channels to prevent torsional deformation and actuator jamming.

A pipe wrench aligns its second jaw with a biasing mechanism to maintain grip stability while adapting to different pipe sizes.

A locking flex-head ratchet wrench uses a rotatable spool to engage ratcheting teeth for secure head positioning.

Concavities on the driving head forefront surfaces eliminate gaps between convexities and hexagonal bolts, ensuring stable rotation.

A decoupling mechanism interrupts torque transmission to prevent hammer damage at high axial displacement.