Screws TRIZ Cases

Reverse threaded sections on the shank ream wood openings to counter back-out from freezing cycles.

A lever shaft assembly uses a circumferential groove and projecting wall for positive rotational locking.

A two-piece golf weight screw uses a retaining ring to secure the drive part within a cavity for reliable wrench attachment.

Spring-loaded compression bolts maintain uniform heat distribution across asphalt paving screed plates without complex fluid systems.

Asymmetric head shapes and grooves on shear pins prevent misinstallation, ensuring correct load ratings during hard landings.

Universal mounting kit prevents warping on hollow chambers by adapting screw engagement to substrate type without multiple systems.

Staggered hole expanding blocks and debris exhaust channels reduce screwing torque and prevent workpiece cracking during fastening.

Angled wedge member and locking screw enable precise reinsertion of resharpened cutting tool inserts without requiring tool holder repositioning.

An inclined recess surface enables material escape, reducing screwing resistance and preventing component bursting in hard materials.

Varying thread diameters and pitches on a segmented screw rod resolve the trade-off between drilling speed and dregs removal efficiency.

Vertical groove cuts out welding spatter while incomplete screw portion prevents seizure from oblique insertion.

Cooling ribs extend into the coolant gap to increase surface area, reducing thermal overloads and pressure losses in continuous metal casting.

Triangular shank geometry and helical grooves reduce friction force and actively expel wood chips to prevent composite material cracking.

Segmented chip removal grooves on a tapering screw tail reduce driving torque and prevent wood cracking during fastening.

A self-drilling screw features a shank constriction behind the drill bit to guide thread formation within the pre-drilled hole.

Nested nuts with friction retention adapt to tolerance variations without deforming dashboard pillars.

Asymmetrical saw-type threads cut wood fibers while a carved V-shaped tail conveys debris away from the engagement zone to reduce friction.

Segmented auxiliary threads push and break wood fibers to prevent entanglement, reducing drilling resistance and preventing wood cracking.

Interrupted threading and oblique wings on a truss fastener displace lumber material to prevent splitting, splintering, and cracking in laminated assemblies.

Segmented cutting grooves expel wood chips to prevent surface damage while asymmetric threads resist loosening under vibration.

Relocating the rolling process closing fold from the thread apex to a flank area using an asymmetrical profile design.

Radio frequency screw antenna uses a coupling loop circuit disposed in a head groove to transfer energy via electromagnetic induction.

Beveled flank surfaces at greater than 90 degrees reduce pigtail burr formation and protect sealing washers during screw insertion.

Retractible fastening elements on a door unit carrier resolve the contradiction between secure mounting and easy alignment during assembly.

A fastening element with a kinked thread profile compresses porous material to form a secure mechanical anchor.

Wings fracture upon engaging steel, allowing the fastener to advance through multiple layers without tip failure.

Segmented thread crests with cutting notches break object fibers to reduce drilling torque and prevent debris entanglement during installation.

Segmented screw tip with tapered front and polygonal rear reduces axial force and prevents hardwood splitting during self-tapping.

O-rings in bearing grooves prevent corrosive substance intrusion and eliminate joint play, extending service life under pressure.

A universal license plate bracket uses gripping clamps to attach securely to vehicle horizontal grilles without drilling holes.

Double notches on the screw shank extrude debris to reduce drilling torque, preventing object splitting and screw breakage during high-density fastening.

A hole plug uses a bendable thin-walled leg to lock into plate holes while allowing easy insertion.

Segmented cutting areas on the wood screw head use grooves and rib walls to scrape off burrs, preventing protrusion and ensuring a flush fit.

Asymmetrical threads and anti-screw-out teeth guide wood chips away from the hole, maintaining surface flatness while preventing loosening under vibration.

A bent metal sheet forms a clamping collar to secure a spherical element via laser welding.

Radial locking members on the lifting eye rotate to block the bolt head, resolving tool loss risks and confined space access issues during installation.

An asymmetric thread profile leverages concrete compressive strength to resolve low tensile strength engagement failures.

A fastening screw with a spring element creates a gap between components, compensating for dimensional tolerances and preventing mechanical stress buildup.

Blunt-edged threads compact thermoplastic foam without cutting, preventing stress cracking and maintaining hold in MuCell injection molded parts.

An internal actuating pin releases clamping arms through a blind hole insertion opening, enabling non-destructive detachment without external access.

A screw design featuring dual threads and serrate cutting teeth on the middle segment to drive into wood.

Segmented threads with opening slots provide auxiliary cutting while inclined shank transitions enhance torsional resistance to prevent loosening.

An asymmetric sawtooth thread profile reduces manufacturing costs while ensuring reliable post-expansion behavior in cracked substrates.

Metal skeletons embedded in plastic pins hold superimposed material layers in place after outer coatings melt under extreme heat.

A screw connection uses a deformed section to form an annular projection that creates lateral interlocking between components.

Segmented hard points on a flexible film break up RPG nose cones, reducing vehicle weight while maintaining protection.

Helical grooves on the screw shank remove wood residues without reducing binding capacity or structural strength.

Varying thread pitch axially tensions and radially expands a plastic sleeve, increasing extraction resistance without overheating the material.

Segmented screw threads with distinct included angles and opening slots reduce drilling resistance by balancing cutting efficiency with thread bearing force.

Radially displacing arcuate ring segments couples blowout preventer top and housing components through an annular groove interface.