Screws TRIZ Cases

A reusable fastening clip uses dual locking mechanisms to maintain pin leg position for easy detachment and reuse.

Segmented grommet and pin components with flexible pawls maintain retention force after repeated removal, solving fastener lifespan issues.

Guide surfaces on support pillars center the clip during insertion, while empty spaces house deformed elastic legs to prevent chipping.

Hard woods resist pointed self-drilling screws; a flat chisel tip cuts across fibers, and a protruding centring point stabilizes the initial path.

Triangular guiding slopes on a screw shank channel debris into exhaust paths, preventing accumulation that causes jamming or workpiece cracking.

Segmented thread forms with a polygonal tapered end resolve single-material optimization limits by improving pull-out force across diverse materials.

Radially resilient spring webs shift catch noses to secure a locking part, eliminating complex manual compression during interconnection.

Dual sub cutting edges on a tapered positioning member sever fibers to reduce torque and prevent debris accumulation during drilling.

Varying rib heights resolve the contradiction between ease of insertion and explosive effect reduction in fastening operations.

A bolted hollow element design uses a radial bolt head and diametrically opposite wall fastening to enhance structural strength.

Moveable arcuate fins on a fastener shank compress for easy insertion into varying aperture diameters, then expand to provide strong retention force.

Elastomer support between actuator plate and vehicle flange absorbs mechanical oscillations.

Segmented threads with a valley reduce drilling resistance and prevent fiber entanglement.

Segmenting the post and hook allows universal fit across component sizes while preventing accidental disconnection of heavy expansion cards.

A self-tapping fastener shank with a cutting edge adapts to borehole irregularities in mineral components.

Curved milling pocket edges on a wood screw countersunk head enhance chip formation and machining effect while preserving structural strength against weakening.

A patient lift connector uses a spring-biased latch to secure lifting bars.

Segmented cutting edge with tapered positioning member guides debris through threaded channels, reducing torque and preventing material breakage.

Segmented shank design with flutes and chip breakers enhances drilling speed and pullout force without compromising ductility or torsional strength.

A threaded pin with a keyed plastic sleeve breaks thermal bridges while securing metal profiles at a distance.

Independent latching elements prevent mutual interference, improving connection reliability while maintaining easy dismantling for repairs.

Segmented drilling portions with integrated channels expel debris to reduce resistance and prevent head protrusion.

Segmented threads optimize drilling and holding strength in friable materials, preventing drywall damage while ensuring secure object mounting.

Segmented auxiliary threads carve material channels to reduce insertion force and prevent wood splitting in hard substrates.

A self-drilling screw uses a tapered unthreaded section to connect dissimilar substrates efficiently.

A flexible screw with a laser-cut helical slot bends to match bone curvature, preventing penetration and maintaining compression.

Resilient fastener fingers enable manual push-in installation, resolving the trade-off between attachment strength and tool-free operation.

Segmented cutting edges with varying angles improve drilling efficiency and thread formation quality while preventing slipping.

Segmented external threads with concave-convex biting surfaces improve initial torque and plastic forming in pilot holes.

A swivel hanger uses a ball-and-socket joint to enable free rotational movement of the anchor member.

A thermal wall anchor uses an insulating coating on its barrel to lower U-values while maintaining structural strength.

A single-part screw anchor combines wood and concrete threads to fasten timber directly into masonry.

A countersunk screw integrates a punching device and milling ribs to cut wood fibers during installation.

A fastening tab with a beveled aperture and flexible joint enables vertical and angular adjustment of construction elements.

Segmented screw threads and milling wings mount fiber cement planks without breakage from internal tensile stress.

A decking screw uses varying thread densities and diameters along the shank to minimize fiber tearing when driving into dense wood.

Asymmetric guide blocks prevent oblique insertion into vehicle panels, ensuring stable anchor retention and sufficient load capacity.

A self-tapping screw with a polygonal core section expands the threaded hole to lower driving torque.

A segmented screw design with identical thread pitches secures wooden elements to aerated concrete substrates without inducing tensile forces.

A screw design uses an angled displacement tip to deform sandwich layers and prevent reverse rotation without pre-drilling.

Segmented screw threads with varying angles reduce plate cracking during air nail driver insertion while maintaining combination force.

Spherical bushing surfaces enable self-alignment in suspension links, eliminating steel-to-steel wear and noise without lubrication.

A composite screw uses a welded tungsten carbide insert to provide high strength at the tapping end.

An opposite pitch cutting thread at the screw tip separates wood fibers cleanly, preventing splitting and enabling complete tightening near structural edges.

An asymmetrical screw design with varying thread angles enhances withdrawal capacity in wood frame construction.

A clip with a flexible hinge couples engaging portions at different angles, absorbing dimensional errors and reducing assembly steps.

Flat sections on the shank create debris pockets that prevent dust accumulation during thread tapping in abrasive stucco substrates.

Non-continuous threaded sections accumulate debris to prevent reaming and ensure firm fastening in concrete.

An eccentric sickle tip with parallel and oblique cutting edges drills a core-diameter hole, reducing forming torque and preventing wood splitting.